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Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Browse source 
Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for MIPS for 4.8.  Also includes is a
  minor SSB cleanup as SSB code traditionally is merged through the MIPS
  tree:

  ATH25:
    - MIPS: Add default configuration for ath25

  Boot:
    - For zboot, copy appended dtb to the end of the kernel
    - store the appended dtb address in a variable

  BPF:
    - Fix off by one error in offset allocation

  Cobalt code:
    - Fix typos

  Core code:
    - debugfs_create_file returns NULL on error, so don't use IS_ERR for
      testing for errors.
    - Fix double locking issue in RM7000 S-cache code.  This would only
      affect RM7000 ARC systems on reboot.
    - Fix page table corruption on THP permission changes.
    - Use compat_sys_keyctl for 32 bit userspace on 64 bit kernels.
      David says, there are no compatibility issues raised by this fix.
    - Move some signal code around.
    - Rewrite r4k count/compare clockevent device registration such that
      min_delta_ticks/max_delta_ticks files are guaranteed to be
      initialized.
    - Only register r4k count/compare as clockevent device if we can
      assume the clock to be constant.
    - Fix MSA asm warnings in control reg accessors
    - uasm and tlbex fixes and tweaking.
    - Print segment physical address when EU=1.
    - Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO.
    - CP: Allow booting by VP other than VP 0
    - Cache handling fixes and optimizations for r4k class caches
    - Add hotplug support for R6 processors
    - Cleanup hotplug bits in kconfig
    - traps: return correct si code for accessing nonmapped addresses
    - Remove cpu_has_safe_index_cacheops

  Lantiq:
    - Register IRQ handler for virtual IRQ number
    - Fix EIU interrupt loading code
    - Use the real EXIN count
    - Fix build error.

  Loongson 3:
    - Increase HPET_MIN_PROG_DELTA and decrease HPET_MIN_CYCLES

  Octeon:
    - Delete built-in DTB pruning code for D-Link DSR-1000N.
    - Clean up GPIO definitions in dlink_dsr-1000n.dts.
    - Add more LEDs to the DSR-100n DTS
    - Fix off by one in octeon_irq_gpio_map()
    - Typo fixes
    - Enable SATA by default in cavium_octeon_defconfig
    - Support readq/writeq()
    - Remove forced mappings of USB interrupts.
    - Ensure DMA descriptors are always in the low 4GB
    - Improve USB reset code for OCTEON II.

  Pistachio:
    - Add maintainers entry for pistachio SoC Support
    - Remove plat_setup_iocoherency

  Ralink:
    - Fix pwm UART in spis group pinmux.

  SSB:
    - Change bare unsigned to unsigned int to suit coding style

  Tools:
    - Fix reloc tool compiler warnings.

  Other:
    - Delete use of ARCH_WANT_OPTIONAL_GPIOLIB"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (61 commits)
  MIPS: mm: Fix definition of R6 cache instruction
  MIPS: tools: Fix relocs tool compiler warnings
  MIPS: Cobalt: Fix typo
  MIPS: Octeon: Fix typo
  MIPS: Lantiq: Fix build failure
  MIPS: Use CPHYSADDR to implement mips32 __pa
  MIPS: Octeon: Dlink_dsr-1000n.dts: add more leds.
  MIPS: Octeon: Clean up GPIO definitions in dlink_dsr-1000n.dts.
  MIPS: Octeon: Delete built-in DTB pruning code for D-Link DSR-1000N.
  MIPS: store the appended dtb address in a variable
  MIPS: ZBOOT: copy appended dtb to the end of the kernel
  MIPS: ralink: fix spis group pinmux
  MIPS: Factor o32 specific code into signal_o32.c
  MIPS: non-exec stack & heap when non-exec PT_GNU_STACK is present
  MIPS: Use per-mm page to execute branch delay slot instructions
  MIPS: Modify error handling
  MIPS: c-r4k: Use SMP calls for CM indexed cache ops
  MIPS: c-r4k: Avoid small flush_icache_range SMP calls
  MIPS: c-r4k: Local flush_icache_range cache op override
  MIPS: c-r4k: Split r4k_flush_kernel_vmap_range()
  ...
This commit is contained in:
Linus Torvalds 2016-08-06 09:13:11 -04:00
commit 4305f42401
69 changed files with 1418 additions and 806 deletions
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10
MAINTAINERS
View file

@ -9252,6 +9252,16 @@ W: http://www.st.com/spear
S: Maintained
F: drivers/pinctrl/spear/
PISTACHIO SOC SUPPORT
M: James Hartley <james.hartley@imgtec.com>
M: Ionela Voinescu <ionela.voinescu@imgtec.com>
L: linux-mips@linux-mips.org
S: Maintained
F: arch/mips/pistachio/
F: arch/mips/include/asm/mach-pistachio/
F: arch/mips/boot/dts/pistachio/
F: arch/mips/configs/pistachio*_defconfig
PKTCDVD DRIVER
M: Jiri Kosina <jikos@kernel.org>
S: Maintained

47
arch/mips/Kconfig
View file

@ -64,6 +64,7 @@ config MIPS
select GENERIC_TIME_VSYSCALL
select ARCH_CLOCKSOURCE_DATA
select HANDLE_DOMAIN_IRQ
select HAVE_EXIT_THREAD
menu "Machine selection"
@ -384,7 +385,7 @@ config MACH_PISTACHIO
select CLKSRC_MIPS_GIC
select COMMON_CLK
select CSRC_R4K
select DMA_MAYBE_COHERENT
select DMA_NONCOHERENT
select GPIOLIB
select IRQ_MIPS_CPU
select LIBFDT
@ -880,7 +881,6 @@ config CAVIUM_OCTEON_SOC
select SYS_SUPPORTS_HOTPLUG_CPU if CPU_BIG_ENDIAN
select SYS_HAS_EARLY_PRINTK
select SYS_HAS_CPU_CAVIUM_OCTEON
select SWAP_IO_SPACE
select HW_HAS_PCI
select ZONE_DMA32
select HOLES_IN_ZONE
@ -1111,16 +1111,6 @@ config NEED_DMA_MAP_STATE
config SYS_HAS_EARLY_PRINTK
bool
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
depends on SMP && SYS_SUPPORTS_HOTPLUG_CPU
help
Say Y here to allow turning CPUs off and on. CPUs can be
controlled through /sys/devices/system/cpu.
(Note: power management support will enable this option
automatically on SMP systems. )
Say N if you want to disable CPU hotplug.
config SYS_SUPPORTS_HOTPLUG_CPU
bool
@ -1406,7 +1396,6 @@ config CPU_LOONGSON1B
bool "Loongson 1B"
depends on SYS_HAS_CPU_LOONGSON1B
select CPU_LOONGSON1
select ARCH_WANT_OPTIONAL_GPIOLIB
select LEDS_GPIO_REGISTER
help
The Loongson 1B is a 32-bit SoC, which implements the MIPS32
@ -2636,6 +2625,16 @@ config SMP
If you don't know what to do here, say N.
config HOTPLUG_CPU
bool "Support for hot-pluggable CPUs"
depends on SMP && SYS_SUPPORTS_HOTPLUG_CPU
help
Say Y here to allow turning CPUs off and on. CPUs can be
controlled through /sys/devices/system/cpu.
(Note: power management support will enable this option
automatically on SMP systems. )
Say N if you want to disable CPU hotplug.
config SMP_UP
bool
@ -2887,10 +2886,10 @@ choice
the documented boot protocol using a device tree.
config MIPS_RAW_APPENDED_DTB
bool "vmlinux.bin"
bool "vmlinux.bin or vmlinuz.bin"
help
With this option, the boot code will look for a device tree binary
DTB) appended to raw vmlinux.bin (without decompressor).
DTB) appended to raw vmlinux.bin or vmlinuz.bin.
(e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb).
This is meant as a backward compatibility convenience for those
@ -2902,24 +2901,6 @@ choice
look like a DTB header after a reboot if no actual DTB is appended
to vmlinux.bin. Do not leave this option active in a production kernel
if you don't intend to always append a DTB.
config MIPS_ZBOOT_APPENDED_DTB
bool "vmlinuz.bin"
depends on SYS_SUPPORTS_ZBOOT
help
With this option, the boot code will look for a device tree binary
DTB) appended to raw vmlinuz.bin (with decompressor).
(e.g. cat vmlinuz.bin <filename>.dtb > vmlinuz_w_dtb).
This is meant as a backward compatibility convenience for those
systems with a bootloader that can't be upgraded to accommodate
the documented boot protocol using a device tree.
Beware that there is very little in terms of protection against
this option being confused by leftover garbage in memory that might
look like a DTB header after a reboot if no actual DTB is appended
to vmlinuz.bin. Do not leave this option active in a production kernel
if you don't intend to always append a DTB.
endchoice
choice

4
arch/mips/ath79/setup.c
View file

@ -203,8 +203,8 @@ void __init plat_mem_setup(void)
fdt_start = fw_getenvl("fdt_start");
if (fdt_start)
__dt_setup_arch((void *)KSEG0ADDR(fdt_start));
else if (fw_arg0 == -2)
__dt_setup_arch((void *)KSEG0ADDR(fw_arg1));
else if (fw_passed_dtb)
__dt_setup_arch((void *)KSEG0ADDR(fw_passed_dtb));
if (mips_machtype != ATH79_MACH_GENERIC_OF) {
ath79_reset_base = ioremap_nocache(AR71XX_RESET_BASE,

4
arch/mips/bmips/setup.c
View file

@ -162,8 +162,8 @@ void __init plat_mem_setup(void)
/* intended to somewhat resemble ARM; see Documentation/arm/Booting */
if (fw_arg0 == 0 && fw_arg1 == 0xffffffff)
dtb = phys_to_virt(fw_arg2);
else if (fw_arg0 == -2) /* UHI interface */
dtb = (void *)fw_arg1;
else if (fw_passed_dtb) /* UHI interface */
dtb = (void *)fw_passed_dtb;
else if (__dtb_start != __dtb_end)
dtb = (void *)__dtb_start;
else

17
arch/mips/boot/compressed/decompress.c
View file

@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/libfdt.h>
#include <asm/addrspace.h>
@ -36,6 +37,8 @@ extern void puthex(unsigned long long val);
#define puthex(val) do {} while (0)
#endif
extern char __appended_dtb[];
void error(char *x)
{
puts("\n\n");
@ -114,6 +117,20 @@ void decompress_kernel(unsigned long boot_heap_start)
__decompress((char *)zimage_start, zimage_size, 0, 0,
(void *)VMLINUX_LOAD_ADDRESS_ULL, 0, 0, error);
if (IS_ENABLED(CONFIG_MIPS_RAW_APPENDED_DTB) &&
fdt_magic((void *)&__appended_dtb) == FDT_MAGIC) {
unsigned int image_size, dtb_size;
dtb_size = fdt_totalsize((void *)&__appended_dtb);
/* last four bytes is always image size in little endian */
image_size = le32_to_cpup((void *)&__image_end - 4);
/* copy dtb to where the booted kernel will expect it */
memcpy((void *)VMLINUX_LOAD_ADDRESS_ULL + image_size,
__appended_dtb, dtb_size);
}
/* FIXME: should we flush cache here? */
puts("Now, booting the kernel...\n");
}

16
arch/mips/boot/compressed/head.S
View file

@ -25,22 +25,6 @@ start:
move s2, a2
move s3, a3
#ifdef CONFIG_MIPS_ZBOOT_APPENDED_DTB
PTR_LA t0, __appended_dtb
#ifdef CONFIG_CPU_BIG_ENDIAN
li t1, 0xd00dfeed
#else
li t1, 0xedfe0dd0
#endif
lw t2, (t0)
bne t1, t2, not_found
nop
move s1, t0
PTR_LI s0, -2
not_found:
#endif
/* Clear BSS */
PTR_LA a0, _edata
PTR_LA a2, _end

20
arch/mips/boot/dts/cavium-octeon/dlink_dsr-1000n.dts
View file

@ -9,6 +9,7 @@
*/
/include/ "octeon_3xxx.dtsi"
#include <dt-bindings/gpio/gpio.h>
/ {
model = "dlink,dsr-1000n";
@ -63,12 +64,27 @@
usb1 {
label = "usb1";
gpios = <&gpio 9 1>; /* Active low */
gpios = <&gpio 9 GPIO_ACTIVE_LOW>;
};
usb2 {
label = "usb2";
gpios = <&gpio 10 1>; /* Active low */
gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
};
wps {
label = "wps";
gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
};
wireless1 {
label = "5g";
gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
};
wireless2 {
label = "2.4g";
gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
};
};

12
arch/mips/boot/dts/cavium-octeon/octeon_3xxx.dts
View file

@ -388,16 +388,4 @@
usbn = &usbn;
led0 = &led0;
};
dsr1000n-leds {
compatible = "gpio-leds";
usb1 {
label = "usb1";
gpios = <&gpio 9 1>; /* Active low */
};
usb2 {
label = "usb2";
gpios = <&gpio 10 1>; /* Active low */
};
};
};

19
arch/mips/boot/tools/relocs_64.c
View file

@ -9,17 +9,20 @@
typedef uint8_t Elf64_Byte;
typedef struct {
Elf64_Word r_sym; /* Symbol index. */
Elf64_Byte r_ssym; /* Special symbol. */
Elf64_Byte r_type3; /* Third relocation. */
Elf64_Byte r_type2; /* Second relocation. */
Elf64_Byte r_type; /* First relocation. */
typedef union {
struct {
Elf64_Word r_sym; /* Symbol index. */
Elf64_Byte r_ssym; /* Special symbol. */
Elf64_Byte r_type3; /* Third relocation. */
Elf64_Byte r_type2; /* Second relocation. */
Elf64_Byte r_type; /* First relocation. */
} fields;
Elf64_Xword unused;
} Elf64_Mips_Rela;
#define ELF_CLASS ELFCLASS64
#define ELF_R_SYM(val) (((Elf64_Mips_Rela *)(&val))->r_sym)
#define ELF_R_TYPE(val) (((Elf64_Mips_Rela *)(&val))->r_type)
#define ELF_R_SYM(val) (((Elf64_Mips_Rela *)(&val))->fields.r_sym)
#define ELF_R_TYPE(val) (((Elf64_Mips_Rela *)(&val))->fields.r_type)
#define ELF_ST_TYPE(o) ELF64_ST_TYPE(o)
#define ELF_ST_BIND(o) ELF64_ST_BIND(o)
#define ELF_ST_VISIBILITY(o) ELF64_ST_VISIBILITY(o)

2
arch/mips/cavium-octeon/executive/cvmx-bootmem.c
View file

@ -668,7 +668,7 @@ int64_t cvmx_bootmem_phy_named_block_alloc(uint64_t size, uint64_t min_addr,
/*
* Round size up to mult of minimum alignment bytes We need
* the actual size allocated to allow for blocks to be
* coallesced when they are freed. The alloc routine does the
* coalesced when they are freed. The alloc routine does the
* same rounding up on all allocations.
*/
size = ALIGN(size, CVMX_BOOTMEM_ALIGNMENT_SIZE);

22
arch/mips/cavium-octeon/executive/cvmx-helper-board.c
View file

@ -186,15 +186,6 @@ int cvmx_helper_board_get_mii_address(int ipd_port)
return 7 - ipd_port;
else
return -1;
case CVMX_BOARD_TYPE_CUST_DSR1000N:
/*
* Port 2 connects to Broadcom PHY (B5081). Other ports (0-1)
* connect to a switch (BCM53115).
*/
if (ipd_port == 2)
return 8;
else
return -1;
case CVMX_BOARD_TYPE_KONTRON_S1901:
if (ipd_port == CVMX_HELPER_BOARD_MGMT_IPD_PORT)
return 1;
@ -289,18 +280,6 @@ cvmx_helper_link_info_t __cvmx_helper_board_link_get(int ipd_port)
return result;
}
break;
case CVMX_BOARD_TYPE_CUST_DSR1000N:
if (ipd_port == 0 || ipd_port == 1) {
/* Ports 0 and 1 connect to a switch (BCM53115). */
result.s.link_up = 1;
result.s.full_duplex = 1;
result.s.speed = 1000;
return result;
} else {
/* Port 2 uses a Broadcom PHY (B5081). */
is_broadcom_phy = 1;
}
break;
}
phy_addr = cvmx_helper_board_get_mii_address(ipd_port);
@ -765,7 +744,6 @@ enum cvmx_helper_board_usb_clock_types __cvmx_helper_board_usb_get_clock_type(vo
case CVMX_BOARD_TYPE_LANAI2_G:
case CVMX_BOARD_TYPE_NIC10E_66:
case CVMX_BOARD_TYPE_UBNT_E100:
case CVMX_BOARD_TYPE_CUST_DSR1000N:
return USB_CLOCK_TYPE_CRYSTAL_12;
case CVMX_BOARD_TYPE_NIC10E:
return USB_CLOCK_TYPE_REF_12;

14
arch/mips/cavium-octeon/octeon-irq.c
View file

@ -1260,7 +1260,7 @@ static int octeon_irq_gpio_map(struct irq_domain *d,
line = (hw + gpiod->base_hwirq) >> 6;
bit = (hw + gpiod->base_hwirq) & 63;
if (line > ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
if (line >= ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
octeon_irq_ciu_to_irq[line][bit] != 0)
return -EINVAL;
@ -1542,10 +1542,6 @@ static int __init octeon_irq_init_ciu(
goto err;
}
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56);
if (r)
goto err;
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
if (r)
goto err;
@ -1559,10 +1555,6 @@ static int __init octeon_irq_init_ciu(
goto err;
}
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17);
if (r)
goto err;
/* Enable the CIU lines */
set_c0_status(STATUSF_IP3 | STATUSF_IP2);
if (octeon_irq_use_ip4)
@ -2077,10 +2069,6 @@ static int __init octeon_irq_init_ciu2(
goto err;
}
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 3, 44);
if (r)
goto err;
for (i = 0; i < 4; i++) {
r = octeon_irq_force_ciu_mapping(
ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);

125
arch/mips/cavium-octeon/octeon-platform.c
View file

@ -3,33 +3,27 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2004-2011 Cavium Networks
* Copyright (C) 2004-2016 Cavium Networks
* Copyright (C) 2008 Wind River Systems
*/
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/i2c.h>
#include <linux/usb.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
#include <linux/usb/ehci_def.h>
#include <linux/usb/ehci_pdriver.h>
#include <linux/usb/ohci_pdriver.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-rnm-defs.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
#include <asm/octeon/cvmx-uctlx-defs.h>
#define CVMX_UAHCX_EHCI_USBCMD (CVMX_ADD_IO_SEG(0x00016F0000000010ull))
#define CVMX_UAHCX_OHCI_USBCMD (CVMX_ADD_IO_SEG(0x00016F0000000408ull))
/* Octeon Random Number Generator. */
static int __init octeon_rng_device_init(void)
{
@ -78,12 +72,36 @@ static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
static int octeon2_usb_clock_start_cnt;
static int __init octeon2_usb_reset(void)
{
union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
u32 ucmd;
if (!OCTEON_IS_OCTEON2())
return 0;
clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
if (clk_rst_ctl.s.hrst) {
ucmd = cvmx_read64_uint32(CVMX_UAHCX_EHCI_USBCMD);
ucmd &= ~CMD_RUN;
cvmx_write64_uint32(CVMX_UAHCX_EHCI_USBCMD, ucmd);
mdelay(2);
ucmd |= CMD_RESET;
cvmx_write64_uint32(CVMX_UAHCX_EHCI_USBCMD, ucmd);
ucmd = cvmx_read64_uint32(CVMX_UAHCX_OHCI_USBCMD);
ucmd |= CMD_RUN;
cvmx_write64_uint32(CVMX_UAHCX_OHCI_USBCMD, ucmd);
}
return 0;
}
arch_initcall(octeon2_usb_reset);
static void octeon2_usb_clocks_start(struct device *dev)
{
u64 div;
union cvmx_uctlx_if_ena if_ena;
union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
union cvmx_uctlx_uphy_ctl_status uphy_ctl_status;
union cvmx_uctlx_uphy_portx_ctl_status port_ctl_status;
int i;
unsigned long io_clk_64_to_ns;
@ -131,6 +149,17 @@ static void octeon2_usb_clocks_start(struct device *dev)
if_ena.s.en = 1;
cvmx_write_csr(CVMX_UCTLX_IF_ENA(0), if_ena.u64);
for (i = 0; i <= 1; i++) {
port_ctl_status.u64 =
cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
/* Set txvreftune to 15 to obtain compliant 'eye' diagram. */
port_ctl_status.s.txvreftune = 15;
port_ctl_status.s.txrisetune = 1;
port_ctl_status.s.txpreemphasistune = 1;
cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
port_ctl_status.u64);
}
/* Step 3: Configure the reference clock, PHY, and HCLK */
clk_rst_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_CLK_RST_CTL(0));
@ -218,29 +247,10 @@ static void octeon2_usb_clocks_start(struct device *dev)
clk_rst_ctl.s.p_por = 0;
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* Step 5: Wait 1 ms for the PHY clock to start. */
mdelay(1);
/* Step 5: Wait 3 ms for the PHY clock to start. */
mdelay(3);
/*
* Step 6: Program the reset input from automatic test
* equipment field in the UPHY CSR
*/
uphy_ctl_status.u64 = cvmx_read_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0));
uphy_ctl_status.s.ate_reset = 1;
cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
/* Step 7: Wait for at least 10ns. */
ndelay(10);
/* Step 8: Clear the ATE_RESET field in the UPHY CSR. */
uphy_ctl_status.s.ate_reset = 0;
cvmx_write_csr(CVMX_UCTLX_UPHY_CTL_STATUS(0), uphy_ctl_status.u64);
/*
* Step 9: Wait for at least 20ns for UPHY to output PHY clock
* signals and OHCI_CLK48
*/
ndelay(20);
/* Steps 6..9 for ATE only, are skipped. */
/* Step 10: Configure the OHCI_CLK48 and OHCI_CLK12 clocks. */
/* 10a */
@ -261,6 +271,20 @@ static void octeon2_usb_clocks_start(struct device *dev)
clk_rst_ctl.s.p_prst = 1;
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* Step 11b */
udelay(1);
/* Step 11c */
clk_rst_ctl.s.p_prst = 0;
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* Step 11d */
mdelay(1);
/* Step 11e */
clk_rst_ctl.s.p_prst = 1;
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* Step 12: Wait 1 uS. */
udelay(1);
@ -269,21 +293,9 @@ static void octeon2_usb_clocks_start(struct device *dev)
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
end_clock:
/* Now we can set some other registers. */
for (i = 0; i <= 1; i++) {
port_ctl_status.u64 =
cvmx_read_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0));
/* Set txvreftune to 15 to obtain compliant 'eye' diagram. */
port_ctl_status.s.txvreftune = 15;
port_ctl_status.s.txrisetune = 1;
port_ctl_status.s.txpreemphasistune = 1;
cvmx_write_csr(CVMX_UCTLX_UPHY_PORTX_CTL_STATUS(i, 0),
port_ctl_status.u64);
}
/* Set uSOF cycle period to 60,000 bits. */
cvmx_write_csr(CVMX_UCTLX_EHCI_FLA(0), 0x20ull);
exit:
mutex_unlock(&octeon2_usb_clocks_mutex);
}
@ -311,7 +323,11 @@ static struct usb_ehci_pdata octeon_ehci_pdata = {
#ifdef __BIG_ENDIAN
.big_endian_mmio = 1,
#endif
.dma_mask_64 = 1,
/*
* We can DMA from anywhere. But the descriptors must be in
* the lower 4GB.
*/
.dma_mask_64 = 0,
.power_on = octeon_ehci_power_on,
.power_off = octeon_ehci_power_off,
};
@ -689,6 +705,10 @@ int __init octeon_prune_device_tree(void)
if (fdt_check_header(initial_boot_params))
panic("Corrupt Device Tree.");
WARN(octeon_bootinfo->board_type == CVMX_BOARD_TYPE_CUST_DSR1000N,
"Built-in DTB booting is deprecated on %s. Please switch to use appended DTB.",
cvmx_board_type_to_string(octeon_bootinfo->board_type));
aliases = fdt_path_offset(initial_boot_params, "/aliases");
if (aliases < 0) {
pr_err("Error: No /aliases node in device tree.");
@ -1032,13 +1052,6 @@ int __init octeon_prune_device_tree(void)
}
}
if (octeon_bootinfo->board_type != CVMX_BOARD_TYPE_CUST_DSR1000N) {
int dsr1000n_leds = fdt_path_offset(initial_boot_params,
"/dsr1000n-leds");
if (dsr1000n_leds >= 0)
fdt_nop_node(initial_boot_params, dsr1000n_leds);
}
return 0;
}

20
arch/mips/cavium-octeon/setup.c
View file

@ -40,9 +40,27 @@
#include <asm/octeon/octeon.h>
#include <asm/octeon/pci-octeon.h>
#include <asm/octeon/cvmx-mio-defs.h>
#include <asm/octeon/cvmx-rst-defs.h>
/*
* TRUE for devices having registers with little-endian byte
* order, FALSE for registers with native-endian byte order.
* PCI mandates little-endian, USB and SATA are configuraable,
* but we chose little-endian for these.
*/
const bool octeon_should_swizzle_table[256] = {
[0x00] = true, /* bootbus/CF */
[0x1b] = true, /* PCI mmio window */
[0x1c] = true, /* PCI mmio window */
[0x1d] = true, /* PCI mmio window */
[0x1e] = true, /* PCI mmio window */
[0x68] = true, /* OCTEON III USB */
[0x69] = true, /* OCTEON III USB */
[0x6c] = true, /* OCTEON III SATA */
[0x6f] = true, /* OCTEON II USB */
};
EXPORT_SYMBOL(octeon_should_swizzle_table);
#ifdef CONFIG_PCI
extern void pci_console_init(const char *arg);
#endif

1
arch/mips/cavium-octeon/smp.c
View file

@ -271,6 +271,7 @@ static int octeon_cpu_disable(void)
return -ENOTSUPP;
set_cpu_online(cpu, false);
calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
octeon_fixup_irqs();

4
arch/mips/cobalt/setup.c
View file

@ -42,8 +42,8 @@ const char *get_system_type(void)
/*
* Cobalt doesn't have PS/2 keyboard/mouse interfaces,
* keyboard conntroller is never used.
* Also PCI-ISA bridge DMA contoroller is never used.
* keyboard controller is never used.
* Also PCI-ISA bridge DMA controller is never used.
*/
static struct resource cobalt_reserved_resources[] = {
{ /* dma1 */

119
arch/mips/configs/ath25_defconfig Normal file
View file

@ -0,0 +1,119 @@
CONFIG_ATH25=y
# CONFIG_COMPACTION is not set
CONFIG_HZ_100=y
# CONFIG_SECCOMP is not set
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SYSVIPC=y
# CONFIG_CROSS_MEMORY_ATTACH is not set
# CONFIG_FHANDLE is not set
CONFIG_HIGH_RES_TIMERS=y
CONFIG_BLK_DEV_INITRD=y
# CONFIG_RD_GZIP is not set
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_XZ is not set
# CONFIG_RD_LZO is not set
# CONFIG_RD_LZ4 is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
# CONFIG_AIO is not set
CONFIG_EMBEDDED=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_CFQ is not set
# CONFIG_SUSPEND is not set
CONFIG_NET=y
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_IPV6 is not set
CONFIG_CFG80211=m
CONFIG_MAC80211=m
CONFIG_MAC80211_DEBUGFS=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_MTD=y
CONFIG_MTD_REDBOOT_PARTS=y
CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-2
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_CFI=y
CONFIG_MTD_CFI_ADV_OPTIONS=y
CONFIG_MTD_CFI_GEOMETRY=y
# CONFIG_MTD_MAP_BANK_WIDTH_1 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_4 is not set
# CONFIG_MTD_CFI_I2 is not set
CONFIG_MTD_CFI_AMDSTD=y
CONFIG_MTD_COMPLEX_MAPPINGS=y
CONFIG_MTD_PHYSMAP=y
CONFIG_NETDEVICES=y
# CONFIG_ETHERNET is not set
# CONFIG_WLAN_VENDOR_ADMTEK is not set
CONFIG_ATH5K=m
# CONFIG_WLAN_VENDOR_ATMEL is not set
# CONFIG_WLAN_VENDOR_BROADCOM is not set
# CONFIG_WLAN_VENDOR_CISCO is not set
# CONFIG_WLAN_VENDOR_INTEL is not set
# CONFIG_WLAN_VENDOR_INTERSIL is not set
# CONFIG_WLAN_VENDOR_MARVELL is not set
# CONFIG_WLAN_VENDOR_MEDIATEK is not set
# CONFIG_WLAN_VENDOR_RALINK is not set
# CONFIG_WLAN_VENDOR_REALTEK is not set
# CONFIG_WLAN_VENDOR_RSI is not set
# CONFIG_WLAN_VENDOR_ST is not set
# CONFIG_WLAN_VENDOR_TI is not set
# CONFIG_WLAN_VENDOR_ZYDAS is not set
CONFIG_INPUT=m
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_SERIO is not set
# CONFIG_VT is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_DEVKMEM is not set
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
# CONFIG_SERIAL_8250_PCI is not set
CONFIG_SERIAL_8250_NR_UARTS=1
CONFIG_SERIAL_8250_RUNTIME_UARTS=1
# CONFIG_HW_RANDOM is not set
# CONFIG_HWMON is not set
# CONFIG_VGA_ARB is not set
CONFIG_USB=m
CONFIG_USB_EHCI_HCD=m
CONFIG_LEDS_CLASS=y
# CONFIG_IOMMU_SUPPORT is not set
# CONFIG_DNOTIFY is not set
# CONFIG_PROC_PAGE_MONITOR is not set
CONFIG_TMPFS=y
CONFIG_TMPFS_XATTR=y
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_SUMMARY=y
CONFIG_JFFS2_FS_XATTR=y
# CONFIG_JFFS2_FS_POSIX_ACL is not set
# CONFIG_JFFS2_FS_SECURITY is not set
CONFIG_JFFS2_COMPRESSION_OPTIONS=y
# CONFIG_JFFS2_ZLIB is not set
CONFIG_SQUASHFS=y
CONFIG_SQUASHFS_FILE_DIRECT=y
CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU=y
# CONFIG_SQUASHFS_ZLIB is not set
CONFIG_SQUASHFS_XZ=y
CONFIG_PRINTK_TIME=y
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_STRIP_ASM_SYMS=y
CONFIG_DEBUG_FS=y
# CONFIG_SCHED_DEBUG is not set
# CONFIG_FTRACE is not set
# CONFIG_XZ_DEC_X86 is not set
# CONFIG_XZ_DEC_POWERPC is not set
# CONFIG_XZ_DEC_IA64 is not set
# CONFIG_XZ_DEC_ARM is not set
# CONFIG_XZ_DEC_ARMTHUMB is not set
# CONFIG_XZ_DEC_SPARC is not set

2
arch/mips/configs/cavium_octeon_defconfig
View file

@ -59,6 +59,8 @@ CONFIG_EEPROM_AT25=y
CONFIG_BLK_DEV_SD=y
CONFIG_ATA=y
CONFIG_SATA_AHCI=y
CONFIG_SATA_AHCI_PLATFORM=y
CONFIG_AHCI_OCTEON=y
CONFIG_PATA_OCTEON_CF=y
CONFIG_SATA_SIL=y
CONFIG_NETDEVICES=y

4
arch/mips/include/asm/bootinfo.h
View file

@ -127,6 +127,10 @@ extern char arcs_cmdline[COMMAND_LINE_SIZE];
*/
extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
#ifdef CONFIG_USE_OF
extern unsigned long fw_passed_dtb;
#endif
/*
* Platform memory detection hook called by setup_arch
*/

92
arch/mips/include/asm/dsemul.h Normal file
View file

@ -0,0 +1,92 @@
/*
* Copyright (C) 2016 Imagination Technologies
* Author: Paul Burton <paul.burton@imgtec.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef __MIPS_ASM_DSEMUL_H__
#define __MIPS_ASM_DSEMUL_H__
#include <asm/break.h>
#include <asm/inst.h>
/* Break instruction with special math emu break code set */
#define BREAK_MATH(micromips) (((micromips) ? 0x7 : 0xd) | (BRK_MEMU << 16))
/* When used as a frame index, indicates the lack of a frame */
#define BD_EMUFRAME_NONE ((int)BIT(31))
struct mm_struct;
struct pt_regs;
struct task_struct;
/**
* mips_dsemul() - 'Emulate' an instruction from a branch delay slot
* @regs: User thread register context.
* @ir: The instruction to be 'emulated'.
* @branch_pc: The PC of the branch instruction.
* @cont_pc: The PC to continue at following 'emulation'.
*
* Emulate or execute an arbitrary MIPS instruction within the context of
* the current user thread. This is used primarily to handle instructions
* in the delay slots of emulated branch instructions, for example FP
* branch instructions on systems without an FPU.
*
* Return: Zero on success, negative if ir is a NOP, signal number on failure.
*/
extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
unsigned long branch_pc, unsigned long cont_pc);
/**
* do_dsemulret() - Return from a delay slot 'emulation' frame
* @xcp: User thread register context.
*
* Call in response to the BRK_MEMU break instruction used to return to
* the kernel from branch delay slot 'emulation' frames following a call
* to mips_dsemul(). Restores the user thread PC to the value that was
* passed as the cpc parameter to mips_dsemul().
*
* Return: True if an emulation frame was returned from, else false.
*/
extern bool do_dsemulret(struct pt_regs *xcp);
/**
* dsemul_thread_cleanup() - Cleanup thread 'emulation' frame
* @tsk: The task structure associated with the thread
*
* If the thread @tsk has a branch delay slot 'emulation' frame
* allocated to it then free that frame.
*
* Return: True if a frame was freed, else false.
*/
extern bool dsemul_thread_cleanup(struct task_struct *tsk);
/**
* dsemul_thread_rollback() - Rollback from an 'emulation' frame
* @regs: User thread register context.
*
* If the current thread, whose register context is represented by @regs,
* is executing within a delay slot 'emulation' frame then exit that
* frame. The PC will be rolled back to the branch if the instruction
* that was being 'emulated' has not yet executed, or advanced to the
* continuation PC if it has.
*
* Return: True if a frame was exited, else false.
*/
extern bool dsemul_thread_rollback(struct pt_regs *regs);
/**
* dsemul_mm_cleanup() - Cleanup per-mm delay slot 'emulation' state
* @mm: The struct mm_struct to cleanup state for.
*
* Cleanup state for the given @mm, ensuring that any memory allocated
* for delay slot 'emulation' book-keeping is freed. This is to be called
* before @mm is freed in order to avoid memory leaks.
*/
extern void dsemul_mm_cleanup(struct mm_struct *mm);
#endif /* __MIPS_ASM_DSEMUL_H__ */

4
arch/mips/include/asm/elf.h
View file

@ -458,6 +458,7 @@ extern const char *__elf_platform;
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
#endif
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \
@ -498,4 +499,7 @@ extern int arch_check_elf(void *ehdr, bool has_interpreter, void *interp_ehdr,
extern void mips_set_personality_nan(struct arch_elf_state *state);
extern void mips_set_personality_fp(struct arch_elf_state *state);
#define elf_read_implies_exec(ex, stk) mips_elf_read_implies_exec(&(ex), stk)
extern int mips_elf_read_implies_exec(void *elf_ex, int exstack);
#endif /* _ASM_ELF_H */

17
arch/mips/include/asm/fpu_emulator.h
View file

@ -24,7 +24,7 @@
#define _ASM_FPU_EMULATOR_H
#include <linux/sched.h>
#include <asm/break.h>
#include <asm/dsemul.h>
#include <asm/thread_info.h>
#include <asm/inst.h>
#include <asm/local.h>
@ -60,27 +60,16 @@ do { \
#define MIPS_FPU_EMU_INC_STATS(M) do { } while (0)
#endif /* CONFIG_DEBUG_FS */
extern int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
unsigned long cpc);
extern int do_dsemulret(struct pt_regs *xcp);
extern int fpu_emulator_cop1Handler(struct pt_regs *xcp,
struct mips_fpu_struct *ctx, int has_fpu,
void *__user *fault_addr);
int process_fpemu_return(int sig, void __user *fault_addr,
unsigned long fcr31);
int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc);
int mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc);
/*
* Instruction inserted following the badinst to further tag the sequence
*/
#define BD_COOKIE 0x0000bd36 /* tne $0, $0 with baggage */
/*
* Break instruction with special math emu break code set
*/
#define BREAK_MATH(micromips) (((micromips) ? 0x7 : 0xd) | (BRK_MEMU << 16))
#define SIGNALLING_NAN 0x7ff800007ff80000LL
static inline void fpu_emulator_init_fpu(void)

2
arch/mips/include/asm/mach-cavium-octeon/irq.h
View file

@ -42,8 +42,6 @@ enum octeon_irq {
OCTEON_IRQ_TIMER1,
OCTEON_IRQ_TIMER2,
OCTEON_IRQ_TIMER3,
OCTEON_IRQ_USB0,
OCTEON_IRQ_USB1,
#ifndef CONFIG_PCI_MSI
OCTEON_IRQ_LAST = 127
#endif

42
arch/mips/include/asm/mach-cavium-octeon/mangle-port.h
View file

@ -12,6 +12,14 @@
#ifdef __BIG_ENDIAN
static inline bool __should_swizzle_bits(volatile void *a)
{
extern const bool octeon_should_swizzle_table[];
unsigned long did = ((unsigned long)a >> 40) & 0xff;
return octeon_should_swizzle_table[did];
}
# define __swizzle_addr_b(port) (port)
# define __swizzle_addr_w(port) (port)
# define __swizzle_addr_l(port) (port)
@ -19,6 +27,8 @@
#else /* __LITTLE_ENDIAN */
#define __should_swizzle_bits(a) false
static inline bool __should_swizzle_addr(unsigned long p)
{
/* boot bus? */
@ -35,40 +45,14 @@ static inline bool __should_swizzle_addr(unsigned long p)
#endif /* __BIG_ENDIAN */
/*
* Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
* less sane hardware forces software to fiddle with this...
*
* Regardless, if the host bus endianness mismatches that of PCI/ISA, then
* you can't have the numerical value of data and byte addresses within
* multibyte quantities both preserved at the same time. Hence two
* variations of functions: non-prefixed ones that preserve the value
* and prefixed ones that preserve byte addresses. The latters are
* typically used for moving raw data between a peripheral and memory (cf.
* string I/O functions), hence the "__mem_" prefix.
*/
#if defined(CONFIG_SWAP_IO_SPACE)
# define ioswabb(a, x) (x)
# define __mem_ioswabb(a, x) (x)
# define ioswabw(a, x) le16_to_cpu(x)
# define ioswabw(a, x) (__should_swizzle_bits(a) ? le16_to_cpu(x) : x)
# define __mem_ioswabw(a, x) (x)
# define ioswabl(a, x) le32_to_cpu(x)
# define ioswabl(a, x) (__should_swizzle_bits(a) ? le32_to_cpu(x) : x)
# define __mem_ioswabl(a, x) (x)
# define ioswabq(a, x) le64_to_cpu(x)
# define ioswabq(a, x) (__should_swizzle_bits(a) ? le64_to_cpu(x) : x)
# define __mem_ioswabq(a, x) (x)
#else
# define ioswabb(a, x) (x)
# define __mem_ioswabb(a, x) (x)
# define ioswabw(a, x) (x)
# define __mem_ioswabw(a, x) cpu_to_le16(x)
# define ioswabl(a, x) (x)
# define __mem_ioswabl(a, x) cpu_to_le32(x)
# define ioswabq(a, x) (x)
# define __mem_ioswabq(a, x) cpu_to_le32(x)
#endif
#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */

9
arch/mips/include/asm/mmu.h
View file

@ -2,11 +2,20 @@
#define __ASM_MMU_H
#include <linux/atomic.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
typedef struct {
unsigned long asid[NR_CPUS];
void *vdso;
atomic_t fp_mode_switching;
/* lock to be held whilst modifying fp_bd_emupage_allocmap */
spinlock_t bd_emupage_lock;
/* bitmap tracking allocation of fp_bd_emupage */
unsigned long *bd_emupage_allocmap;
/* wait queue for threads requiring an emuframe */
wait_queue_head_t bd_emupage_queue;
} mm_context_t;
#endif /* __ASM_MMU_H */

6
arch/mips/include/asm/mmu_context.h
View file

@ -16,6 +16,7 @@
#include <linux/smp.h>
#include <linux/slab.h>
#include <asm/cacheflush.h>
#include <asm/dsemul.h>
#include <asm/hazards.h>
#include <asm/tlbflush.h>
#include <asm-generic/mm_hooks.h>
@ -128,6 +129,10 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
atomic_set(&mm->context.fp_mode_switching, 0);
mm->context.bd_emupage_allocmap = NULL;
spin_lock_init(&mm->context.bd_emupage_lock);
init_waitqueue_head(&mm->context.bd_emupage_queue);
return 0;
}
@ -162,6 +167,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
*/
static inline void destroy_context(struct mm_struct *mm)
{
dsemul_mm_cleanup(mm);
}
#define deactivate_mm(tsk, mm) do { } while (0)

2
arch/mips/include/asm/msa.h
View file

@ -168,6 +168,7 @@ static inline unsigned int read_msa_##name(void) \
unsigned int reg; \
__asm__ __volatile__( \
" .set push\n" \
" .set fp=64\n" \
" .set msa\n" \
" cfcmsa %0, $" #cs "\n" \
" .set pop\n" \
@ -179,6 +180,7 @@ static inline void write_msa_##name(unsigned int val) \
{ \
__asm__ __volatile__( \
" .set push\n" \
" .set fp=64\n" \
" .set msa\n" \
" ctcmsa $" #cs ", %0\n" \
" .set pop\n" \

44
arch/mips/include/asm/page.h
View file

@ -162,16 +162,34 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/*
* __pa()/__va() should be used only during mem init.
*/
#ifdef CONFIG_64BIT
#define __pa(x) \
({ \
unsigned long __x = (unsigned long)(x); \
__x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \
})
#else
#define __pa(x) \
((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
#endif
static inline unsigned long ___pa(unsigned long x)
{
if (config_enabled(CONFIG_64BIT)) {
/*
* For MIPS64 the virtual address may either be in one of
* the compatibility segements ckseg0 or ckseg1, or it may
* be in xkphys.
*/
return x < CKSEG0 ? XPHYSADDR(x) : CPHYSADDR(x);
}
if (!config_enabled(CONFIG_EVA)) {
/*
* We're using the standard MIPS32 legacy memory map, ie.
* the address x is going to be in kseg0 or kseg1. We can
* handle either case by masking out the desired bits using
* CPHYSADDR.
*/
return CPHYSADDR(x);
}
/*
* EVA is in use so the memory map could be anything, making it not
* safe to just mask out bits.
*/
return x - PAGE_OFFSET + PHYS_OFFSET;
}
#define __pa(x) ___pa((unsigned long)(x))
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
#include <asm/io.h>
@ -229,8 +247,10 @@ extern int __virt_addr_valid(const volatile void *kaddr);
#define virt_addr_valid(kaddr) \
__virt_addr_valid((const volatile void *) (kaddr))
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define VM_DATA_DEFAULT_FLAGS \
(VM_READ | VM_WRITE | \
((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)

18
arch/mips/include/asm/processor.h
View file

@ -11,12 +11,14 @@
#ifndef _ASM_PROCESSOR_H
#define _ASM_PROCESSOR_H
#include <linux/atomic.h>
#include <linux/cpumask.h>
#include <linux/threads.h>
#include <asm/cachectl.h>
#include <asm/cpu.h>
#include <asm/cpu-info.h>
#include <asm/dsemul.h>
#include <asm/mipsregs.h>
#include <asm/prefetch.h>
@ -78,7 +80,11 @@ extern unsigned int vced_count, vcei_count;
#endif
#define STACK_TOP (TASK_SIZE & PAGE_MASK)
/*
* One page above the stack is used for branch delay slot "emulation".
* See dsemul.c for details.
*/
#define STACK_TOP ((TASK_SIZE & PAGE_MASK) - PAGE_SIZE)
/*
* This decides where the kernel will search for a free chunk of vm
@ -256,6 +262,12 @@ struct thread_struct {
/* Saved fpu/fpu emulator stuff. */
struct mips_fpu_struct fpu FPU_ALIGN;
/* Assigned branch delay slot 'emulation' frame */
atomic_t bd_emu_frame;
/* PC of the branch from a branch delay slot 'emulation' */
unsigned long bd_emu_branch_pc;
/* PC to continue from following a branch delay slot 'emulation' */
unsigned long bd_emu_cont_pc;
#ifdef CONFIG_MIPS_MT_FPAFF
/* Emulated instruction count */
unsigned long emulated_fp;
@ -323,6 +335,10 @@ struct thread_struct {
* FPU affinity state (null if not FPAFF) \
*/ \
FPAFF_INIT \
/* Delay slot emulation */ \
.bd_emu_frame = ATOMIC_INIT(BD_EMUFRAME_NONE), \
.bd_emu_branch_pc = 0, \
.bd_emu_cont_pc = 0, \
/* \
* Saved DSP stuff \
*/ \

4
arch/mips/include/asm/r4kcache.h
View file

@ -210,7 +210,11 @@ static inline void protected_writeback_dcache_line(unsigned long addr)
static inline void protected_writeback_scache_line(unsigned long addr)
{
#ifdef CONFIG_EVA
protected_cachee_op(Hit_Writeback_Inv_SD, addr);
#else
protected_cache_op(Hit_Writeback_Inv_SD, addr);
#endif
}
/*

2
arch/mips/include/asm/signal.h
View file

@ -11,7 +11,7 @@
#include <uapi/asm/signal.h>
#ifdef CONFIG_MIPS32_COMPAT
#ifdef CONFIG_MIPS32_O32
extern struct mips_abi mips_abi_32;
#define sig_uses_siginfo(ka, abi) \

4
arch/mips/include/asm/smp.h
View file

@ -23,7 +23,7 @@
extern int smp_num_siblings;
extern cpumask_t cpu_sibling_map[];
extern cpumask_t cpu_core_map[];
extern cpumask_t cpu_foreign_map;
extern cpumask_t cpu_foreign_map[];
#define raw_smp_processor_id() (current_thread_info()->cpu)
@ -53,6 +53,8 @@ extern cpumask_t cpu_coherent_mask;
extern void asmlinkage smp_bootstrap(void);
extern void calculate_cpu_foreign_map(void);
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing

2
arch/mips/include/uapi/asm/auxvec.h
View file

@ -14,4 +14,6 @@
/* Location of VDSO image. */
#define AT_SYSINFO_EHDR 33
#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
#endif /* __ASM_AUXVEC_H */

2
arch/mips/kernel/Makefile
View file

@ -71,7 +71,7 @@ obj-$(CONFIG_32BIT) += scall32-o32.o
obj-$(CONFIG_64BIT) += scall64-64.o
obj-$(CONFIG_MIPS32_COMPAT) += linux32.o ptrace32.o signal32.o
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o signal_o32.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_PROC_FS) += proc.o

7
arch/mips/kernel/cevt-r4k.c
View file

@ -276,12 +276,7 @@ int r4k_clockevent_init(void)
CLOCK_EVT_FEAT_C3STOP |
CLOCK_EVT_FEAT_PERCPU;
clockevent_set_clock(cd, mips_hpt_frequency);
/* Calculate the min / max delta */
cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd);
min_delta = calculate_min_delta();
cd->min_delta_ns = clockevent_delta2ns(min_delta, cd);
cd->rating = 300;
cd->irq = irq;
@ -289,7 +284,7 @@ int r4k_clockevent_init(void)
cd->set_next_event = mips_next_event;
cd->event_handler = mips_event_handler;
clockevents_register_device(cd);
clockevents_config_and_register(cd, mips_hpt_frequency, min_delta, 0x7fffffff);
if (cp0_timer_irq_installed)
return 0;

4
arch/mips/kernel/csrc-r4k.c
View file

@ -23,7 +23,7 @@ static struct clocksource clocksource_mips = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
static u64 notrace r4k_read_sched_clock(void)
static u64 __maybe_unused notrace r4k_read_sched_clock(void)
{
return read_c0_count();
}
@ -82,7 +82,9 @@ int __init init_r4k_clocksource(void)
clocksource_register_hz(&clocksource_mips, mips_hpt_frequency);
#ifndef CONFIG_CPU_FREQ
sched_clock_register(r4k_read_sched_clock, 32, mips_hpt_frequency);
#endif
return 0;
}

19
arch/mips/kernel/elf.c
View file

@ -8,9 +8,12 @@
* option) any later version.
*/
#include <linux/binfmts.h>
#include <linux/elf.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <asm/cpu-features.h>
#include <asm/cpu-info.h>
/* Whether to accept legacy-NaN and 2008-NaN user binaries. */
@ -326,3 +329,19 @@ void mips_set_personality_nan(struct arch_elf_state *state)
BUG();
}
}
int mips_elf_read_implies_exec(void *elf_ex, int exstack)
{
if (exstack != EXSTACK_DISABLE_X) {
/* The binary doesn't request a non-executable stack */
return 1;
}
if (!cpu_has_rixi) {
/* The CPU doesn't support non-executable memory */
return 1;
}
return 0;
}
EXPORT_SYMBOL(mips_elf_read_implies_exec);

21
arch/mips/kernel/head.S
View file

@ -93,21 +93,24 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
jr t0
0:
#ifdef CONFIG_USE_OF
#ifdef CONFIG_MIPS_RAW_APPENDED_DTB
PTR_LA t0, __appended_dtb
PTR_LA t2, __appended_dtb
#ifdef CONFIG_CPU_BIG_ENDIAN
li t1, 0xd00dfeed
#else
li t1, 0xedfe0dd0
#endif
lw t2, (t0)
bne t1, t2, not_found
nop
lw t0, (t2)
beq t0, t1, dtb_found
#endif
li t1, -2
beq a0, t1, dtb_found
move t2, a1
move a1, t0
PTR_LI a0, -2
not_found:
li t2, 0
dtb_found:
#endif
PTR_LA t0, __bss_start # clear .bss
LONG_S zero, (t0)
@ -122,6 +125,10 @@ not_found:
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
#ifdef CONFIG_USE_OF
LONG_S t2, fw_passed_dtb
#endif
MTC0 zero, CP0_CONTEXT # clear context register
PTR_LA $28, init_thread_union
/* Set the SP after an empty pt_regs. */

8
arch/mips/kernel/mips-r2-to-r6-emul.c
View file

@ -283,7 +283,7 @@ static int jr_func(struct pt_regs *regs, u32 ir)
err = mipsr6_emul(regs, nir);
if (err > 0) {
regs->cp0_epc = nepc;
err = mips_dsemul(regs, nir, cepc);
err = mips_dsemul(regs, nir, epc, cepc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@ -1033,7 +1033,7 @@ int mipsr2_decoder(struct pt_regs *regs, u32 inst, unsigned long *fcr31)
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
err = mips_dsemul(regs, nir, cpc);
err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@ -1082,7 +1082,7 @@ int mipsr2_decoder(struct pt_regs *regs, u32 inst, unsigned long *fcr31)
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
err = mips_dsemul(regs, nir, cpc);
err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);
@ -1149,7 +1149,7 @@ int mipsr2_decoder(struct pt_regs *regs, u32 inst, unsigned long *fcr31)
if (nir) {
err = mipsr6_emul(regs, nir);
if (err > 0) {
err = mips_dsemul(regs, nir, cpc);
err = mips_dsemul(regs, nir, epc, cpc);
if (err == SIGILL)
err = SIGEMT;
MIPS_R2_STATS(dsemul);

14
arch/mips/kernel/process.c
View file

@ -30,6 +30,7 @@
#include <asm/asm.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/dsemul.h>
#include <asm/dsp.h>
#include <asm/fpu.h>
#include <asm/msa.h>
@ -68,11 +69,22 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
lose_fpu(0);
clear_thread_flag(TIF_MSA_CTX_LIVE);
clear_used_math();
atomic_set(&current->thread.bd_emu_frame, BD_EMUFRAME_NONE);
init_dsp();
regs->cp0_epc = pc;
regs->regs[29] = sp;
}
void exit_thread(struct task_struct *tsk)
{
/*
* User threads may have allocated a delay slot emulation frame.
* If so, clean up that allocation.
*/
if (!(current->flags & PF_KTHREAD))
dsemul_thread_cleanup(tsk);
}
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
/*
@ -159,6 +171,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
clear_tsk_thread_flag(p, TIF_FPUBOUND);
#endif /* CONFIG_MIPS_MT_FPAFF */
atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
if (clone_flags & CLONE_SETTLS)
ti->tp_value = regs->regs[7];

2
arch/mips/kernel/scall64-n32.S
View file

@ -348,7 +348,7 @@ EXPORT(sysn32_call_table)
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key
PTR sys_request_key
PTR sys_keyctl /* 6245 */
PTR compat_sys_keyctl /* 6245 */
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch

2
arch/mips/kernel/scall64-o32.S
View file

@ -504,7 +504,7 @@ EXPORT(sys32_call_table)
PTR sys_ni_syscall /* available, was setaltroot */
PTR sys_add_key /* 4280 */
PTR sys_request_key
PTR sys_keyctl
PTR compat_sys_keyctl
PTR sys_set_thread_area
PTR sys_inotify_init
PTR sys_inotify_add_watch /* 4285 */

13
arch/mips/kernel/segment.c
View file

@ -26,17 +26,20 @@ static void build_segment_config(char *str, unsigned int cfg)
/*
* Access modes MK, MSK and MUSK are mapped segments. Therefore
* there is no direct physical address mapping.
* there is no direct physical address mapping unless it becomes
* unmapped uncached at error level due to EU.
*/
if ((am == 0) || (am > 3)) {
if ((am == 0) || (am > 3) || (cfg & MIPS_SEGCFG_EU))
str += sprintf(str, " %03lx",
((cfg & MIPS_SEGCFG_PA) >> MIPS_SEGCFG_PA_SHIFT));
else
str += sprintf(str, " UND");
if ((am == 0) || (am > 3))
str += sprintf(str, " %01ld",
((cfg & MIPS_SEGCFG_C) >> MIPS_SEGCFG_C_SHIFT));
} else {
str += sprintf(str, " UND");
else
str += sprintf(str, " U");
}
/* Exception configuration. */
str += sprintf(str, " %01ld\n",

4
arch/mips/kernel/setup.c
View file

@ -875,6 +875,10 @@ void __init setup_arch(char **cmdline_p)
unsigned long kernelsp[NR_CPUS];
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
#ifdef CONFIG_USE_OF
unsigned long fw_passed_dtb;
#endif
#ifdef CONFIG_DEBUG_FS
struct dentry *mips_debugfs_dir;
static int __init debugfs_mips(void)

8
arch/mips/kernel/signal.c
View file

@ -772,6 +772,14 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
struct mips_abi *abi = current->thread.abi;
void *vdso = current->mm->context.vdso;
/*
* If we were emulating a delay slot instruction, exit that frame such
* that addresses in the sigframe are as expected for userland and we
* don't have a problem if we reuse the thread's frame for an
* instruction within the signal handler.
*/
dsemul_thread_rollback(regs);
if (regs->regs[0]) {
switch(regs->regs[2]) {
case ERESTART_RESTARTBLOCK:

288
arch/mips/kernel/signal32.c
View file

@ -6,129 +6,26 @@
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2016, Imagination Technologies Ltd.
*/
#include <linux/cache.h>
#include <linux/compat.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/suspend.h>
#include <linux/compiler.h>
#include <linux/uaccess.h>
#include <asm/abi.h>
#include <asm/asm.h>
#include <asm/compat.h>
#include <asm/compat-signal.h>
#include <linux/bitops.h>
#include <asm/cacheflush.h>
#include <asm/sim.h>
#include <asm/ucontext.h>
#include <asm/fpu.h>
#include <asm/war.h>
#include <asm/dsp.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include "signal-common.h"
/*
* Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
*/
#define __NR_O32_restart_syscall 4253
/* 32-bit compatibility types */
typedef unsigned int __sighandler32_t;
typedef void (*vfptr_t)(void);
struct ucontext32 {
u32 uc_flags;
s32 uc_link;
compat_stack_t uc_stack;
struct sigcontext32 uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
struct sigframe32 {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_pad[2]; /* Was: signal trampoline */
struct sigcontext32 sf_sc;
compat_sigset_t sf_mask;
};
struct rt_sigframe32 {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_pad[2]; /* Was: signal trampoline */
compat_siginfo_t rs_info;
struct ucontext32 rs_uc;
};
static int setup_sigcontext32(struct pt_regs *regs,
struct sigcontext32 __user *sc)
{
int err = 0;
int i;
err |= __put_user(regs->cp0_epc, &sc->sc_pc);
err |= __put_user(0, &sc->sc_regs[0]);
for (i = 1; i < 32; i++)
err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
err |= __put_user(regs->hi, &sc->sc_mdhi);
err |= __put_user(regs->lo, &sc->sc_mdlo);
if (cpu_has_dsp) {
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
err |= __put_user(mfhi1(), &sc->sc_hi1);
err |= __put_user(mflo1(), &sc->sc_lo1);
err |= __put_user(mfhi2(), &sc->sc_hi2);
err |= __put_user(mflo2(), &sc->sc_lo2);
err |= __put_user(mfhi3(), &sc->sc_hi3);
err |= __put_user(mflo3(), &sc->sc_lo3);
}
/*
* Save FPU state to signal context. Signal handler
* will "inherit" current FPU state.
*/
err |= protected_save_fp_context(sc);
return err;
}
static int restore_sigcontext32(struct pt_regs *regs,
struct sigcontext32 __user *sc)
{
int err = 0;
s32 treg;
int i;
/* Always make any pending restarted system calls return -EINTR */
current->restart_block.fn = do_no_restart_syscall;
err |= __get_user(regs->cp0_epc, &sc->sc_pc);
err |= __get_user(regs->hi, &sc->sc_mdhi);
err |= __get_user(regs->lo, &sc->sc_mdlo);
if (cpu_has_dsp) {
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
}
for (i = 1; i < 32; i++)
err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
return err ?: protected_restore_fp_context(sc);
}
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
@ -247,176 +144,3 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
return 0;
}
asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe32 __user *frame;
sigset_t blocked;
int sig;
frame = (struct sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
goto badframe;
set_current_blocked(&blocked);
sig = restore_sigcontext32(&regs, &frame->sf_sc);
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe32 __user *frame;
sigset_t set;
int sig;
frame = (struct rt_sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
goto badframe;
set_current_blocked(&set);
sig = restore_sigcontext32(&regs, &frame->rs_uc.uc_mcontext);
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
static int setup_frame_32(void *sig_return, struct ksignal *ksig,
struct pt_regs *regs, sigset_t *set)
{
struct sigframe32 __user *frame;
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return -EFAULT;
err |= setup_sigcontext32(regs, &frame->sf_sc);
err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
if (err)
return -EFAULT;
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = 0 (should be cause)
* a2 = pointer to struct sigcontext
*
* $25 and c0_epc point to the signal handler, $29 points to the
* struct sigframe.
*/
regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = 0;
regs->regs[ 6] = (unsigned long) &frame->sf_sc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
}
static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe32 __user *frame;
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return -EFAULT;
/* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
return -EFAULT;
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = 0 (should be cause)
* a2 = pointer to ucontext
*
* $25 and c0_epc point to the signal handler, $29 points to
* the struct rt_sigframe32.
*/
regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = (unsigned long) &frame->rs_info;
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
}
/*
* o32 compatibility on 64-bit kernels, without DSP ASE
*/
struct mips_abi mips_abi_32 = {
.setup_frame = setup_frame_32,
.setup_rt_frame = setup_rt_frame_32,
.restart = __NR_O32_restart_syscall,
.off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
.off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
.off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
.vdso = &vdso_image_o32,
};

285
arch/mips/kernel/signal_o32.c Normal file
View file

@ -0,0 +1,285 @@
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2016, Imagination Technologies Ltd.
*/
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/uaccess.h>
#include <asm/abi.h>
#include <asm/compat-signal.h>
#include <asm/dsp.h>
#include <asm/sim.h>
#include <asm/unistd.h>
#include "signal-common.h"
/*
* Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
*/
#define __NR_O32_restart_syscall 4253
struct sigframe32 {
u32 sf_ass[4]; /* argument save space for o32 */
u32 sf_pad[2]; /* Was: signal trampoline */
struct sigcontext32 sf_sc;
compat_sigset_t sf_mask;
};
struct ucontext32 {
u32 uc_flags;
s32 uc_link;
compat_stack_t uc_stack;
struct sigcontext32 uc_mcontext;
compat_sigset_t uc_sigmask; /* mask last for extensibility */
};
struct rt_sigframe32 {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_pad[2]; /* Was: signal trampoline */
compat_siginfo_t rs_info;
struct ucontext32 rs_uc;
};
static int setup_sigcontext32(struct pt_regs *regs,
struct sigcontext32 __user *sc)
{
int err = 0;
int i;
err |= __put_user(regs->cp0_epc, &sc->sc_pc);
err |= __put_user(0, &sc->sc_regs[0]);
for (i = 1; i < 32; i++)
err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
err |= __put_user(regs->hi, &sc->sc_mdhi);
err |= __put_user(regs->lo, &sc->sc_mdlo);
if (cpu_has_dsp) {
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
err |= __put_user(mfhi1(), &sc->sc_hi1);
err |= __put_user(mflo1(), &sc->sc_lo1);
err |= __put_user(mfhi2(), &sc->sc_hi2);
err |= __put_user(mflo2(), &sc->sc_lo2);
err |= __put_user(mfhi3(), &sc->sc_hi3);
err |= __put_user(mflo3(), &sc->sc_lo3);
}
/*
* Save FPU state to signal context. Signal handler
* will "inherit" current FPU state.
*/
err |= protected_save_fp_context(sc);
return err;
}
static int restore_sigcontext32(struct pt_regs *regs,
struct sigcontext32 __user *sc)
{
int err = 0;
s32 treg;
int i;
/* Always make any pending restarted system calls return -EINTR */
current->restart_block.fn = do_no_restart_syscall;
err |= __get_user(regs->cp0_epc, &sc->sc_pc);
err |= __get_user(regs->hi, &sc->sc_mdhi);
err |= __get_user(regs->lo, &sc->sc_mdlo);
if (cpu_has_dsp) {
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
}
for (i = 1; i < 32; i++)
err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
return err ?: protected_restore_fp_context(sc);
}
static int setup_frame_32(void *sig_return, struct ksignal *ksig,
struct pt_regs *regs, sigset_t *set)
{
struct sigframe32 __user *frame;
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return -EFAULT;
err |= setup_sigcontext32(regs, &frame->sf_sc);
err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
if (err)
return -EFAULT;
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = 0 (should be cause)
* a2 = pointer to struct sigcontext
*
* $25 and c0_epc point to the signal handler, $29 points to the
* struct sigframe.
*/
regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = 0;
regs->regs[ 6] = (unsigned long) &frame->sf_sc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
}
asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct rt_sigframe32 __user *frame;
sigset_t set;
int sig;
frame = (struct rt_sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
goto badframe;
set_current_blocked(&set);
sig = restore_sigcontext32(&regs, &frame->rs_uc.uc_mcontext);
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
if (compat_restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}
static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
struct pt_regs *regs, sigset_t *set)
{
struct rt_sigframe32 __user *frame;
int err = 0;
frame = get_sigframe(ksig, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
return -EFAULT;
/* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->rs_uc.uc_flags);
err |= __put_user(0, &frame->rs_uc.uc_link);
err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
if (err)
return -EFAULT;
/*
* Arguments to signal handler:
*
* a0 = signal number
* a1 = 0 (should be cause)
* a2 = pointer to ucontext
*
* $25 and c0_epc point to the signal handler, $29 points to
* the struct rt_sigframe32.
*/
regs->regs[ 4] = ksig->sig;
regs->regs[ 5] = (unsigned long) &frame->rs_info;
regs->regs[ 6] = (unsigned long) &frame->rs_uc;
regs->regs[29] = (unsigned long) frame;
regs->regs[31] = (unsigned long) sig_return;
regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
current->comm, current->pid,
frame, regs->cp0_epc, regs->regs[31]);
return 0;
}
/*
* o32 compatibility on 64-bit kernels, without DSP ASE
*/
struct mips_abi mips_abi_32 = {
.setup_frame = setup_frame_32,
.setup_rt_frame = setup_rt_frame_32,
.restart = __NR_O32_restart_syscall,
.off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
.off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
.off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
.vdso = &vdso_image_o32,
};
asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
{
struct sigframe32 __user *frame;
sigset_t blocked;
int sig;
frame = (struct sigframe32 __user *) regs.regs[29];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
goto badframe;
set_current_blocked(&blocked);
sig = restore_sigcontext32(&regs, &frame->sf_sc);
if (sig < 0)
goto badframe;
else if (sig)
force_sig(sig, current);
/*
* Don't let your children do this ...
*/
__asm__ __volatile__(
"move\t$29, %0\n\t"
"j\tsyscall_exit"
:/* no outputs */
:"r" (&regs));
/* Unreached */
badframe:
force_sig(SIGSEGV, current);
}

1
arch/mips/kernel/smp-bmips.c
View file

@ -363,6 +363,7 @@ static int bmips_cpu_disable(void)
pr_info("SMP: CPU%d is offline\n", cpu);
set_cpu_online(cpu, false);
calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
clear_c0_status(IE_IRQ5);

42
arch/mips/kernel/smp-cps.c
View file

@ -206,7 +206,7 @@ static void __init cps_prepare_cpus(unsigned int max_cpus)
}
}
static void boot_core(unsigned core)
static void boot_core(unsigned int core, unsigned int vpe_id)
{
u32 access, stat, seq_state;
unsigned timeout;
@ -233,8 +233,9 @@ static void boot_core(unsigned core)
mips_cpc_lock_other(core);
if (mips_cm_revision() >= CM_REV_CM3) {
/* Run VP0 following the reset */
write_cpc_co_vp_run(0x1);
/* Run only the requested VP following the reset */
write_cpc_co_vp_stop(0xf);
write_cpc_co_vp_run(1 << vpe_id);
/*
* Ensure that the VP_RUN register is written before the
@ -306,7 +307,7 @@ static void cps_boot_secondary(int cpu, struct task_struct *idle)
if (!test_bit(core, core_power)) {
/* Boot a VPE on a powered down core */
boot_core(core);
boot_core(core, vpe_id);
goto out;
}
@ -397,6 +398,7 @@ static int cps_cpu_disable(void)
atomic_sub(1 << cpu_vpe_id(&current_cpu_data), &core_cfg->vpe_mask);
smp_mb__after_atomic();
set_cpu_online(cpu, false);
calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
return 0;
@ -411,14 +413,16 @@ static enum {
void play_dead(void)
{
unsigned cpu, core;
unsigned int cpu, core, vpe_id;
local_irq_disable();
idle_task_exit();
cpu = smp_processor_id();
cpu_death = CPU_DEATH_POWER;
if (cpu_has_mipsmt) {
pr_debug("CPU%d going offline\n", cpu);
if (cpu_has_mipsmt || cpu_has_vp) {
core = cpu_data[cpu].core;
/* Look for another online VPE within the core */
@ -439,10 +443,21 @@ void play_dead(void)
complete(&cpu_death_chosen);
if (cpu_death == CPU_DEATH_HALT) {
/* Halt this TC */
write_c0_tchalt(TCHALT_H);
instruction_hazard();
vpe_id = cpu_vpe_id(&cpu_data[cpu]);
pr_debug("Halting core %d VP%d\n", core, vpe_id);
if (cpu_has_mipsmt) {
/* Halt this TC */
write_c0_tchalt(TCHALT_H);
instruction_hazard();
} else if (cpu_has_vp) {
write_cpc_cl_vp_stop(1 << vpe_id);
/* Ensure that the VP_STOP register is written */
wmb();
}
} else {
pr_debug("Gating power to core %d\n", core);
/* Power down the core */
cps_pm_enter_state(CPS_PM_POWER_GATED);
}
@ -469,6 +484,7 @@ static void wait_for_sibling_halt(void *ptr_cpu)
static void cps_cpu_die(unsigned int cpu)
{
unsigned core = cpu_data[cpu].core;
unsigned int vpe_id = cpu_vpe_id(&cpu_data[cpu]);
unsigned stat;
int err;
@ -497,10 +513,12 @@ static void cps_cpu_die(unsigned int cpu)
* in which case the CPC will refuse to power down the core.
*/
do {
mips_cm_lock_other(core, vpe_id);
mips_cpc_lock_other(core);
stat = read_cpc_co_stat_conf();
stat &= CPC_Cx_STAT_CONF_SEQSTATE_MSK;
mips_cpc_unlock_other();
mips_cm_unlock_other();
} while (stat != CPC_Cx_STAT_CONF_SEQSTATE_D0 &&
stat != CPC_Cx_STAT_CONF_SEQSTATE_D2 &&
stat != CPC_Cx_STAT_CONF_SEQSTATE_U2);
@ -517,6 +535,12 @@ static void cps_cpu_die(unsigned int cpu)
(void *)(unsigned long)cpu, 1);
if (err)
panic("Failed to call remote sibling CPU\n");
} else if (cpu_has_vp) {
do {
mips_cm_lock_other(core, vpe_id);
stat = read_cpc_co_vp_running();
mips_cm_unlock_other();
} while (stat & (1 << vpe_id));
}
}

34
arch/mips/kernel/smp.c
View file

@ -72,7 +72,7 @@ EXPORT_SYMBOL(cpu_core_map);
* A logcal cpu mask containing only one VPE per core to
* reduce the number of IPIs on large MT systems.
*/
cpumask_t cpu_foreign_map __read_mostly;
cpumask_t cpu_foreign_map[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(cpu_foreign_map);
/* representing cpus for which sibling maps can be computed */
@ -124,7 +124,7 @@ static inline void set_cpu_core_map(int cpu)
* Calculate a new cpu_foreign_map mask whenever a
* new cpu appears or disappears.
*/
static inline void calculate_cpu_foreign_map(void)
void calculate_cpu_foreign_map(void)
{
int i, k, core_present;
cpumask_t temp_foreign_map;
@ -141,7 +141,9 @@ static inline void calculate_cpu_foreign_map(void)
cpumask_set_cpu(i, &temp_foreign_map);
}
cpumask_copy(&cpu_foreign_map, &temp_foreign_map);
for_each_online_cpu(i)
cpumask_andnot(&cpu_foreign_map[i],
&temp_foreign_map, &cpu_sibling_map[i]);
}
struct plat_smp_ops *mp_ops;
@ -344,16 +346,9 @@ asmlinkage void start_secondary(void)
static void stop_this_cpu(void *dummy)
{
/*
* Remove this CPU. Be a bit slow here and
* set the bits for every online CPU so we don't miss
* any IPI whilst taking this VPE down.
* Remove this CPU:
*/
cpumask_copy(&cpu_foreign_map, cpu_online_mask);
/* Make it visible to every other CPU */
smp_mb();
set_cpu_online(smp_processor_id(), false);
calculate_cpu_foreign_map();
local_irq_disable();
@ -512,10 +507,17 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned l
smp_on_other_tlbs(flush_tlb_range_ipi, &fd);
} else {
unsigned int cpu;
int exec = vma->vm_flags & VM_EXEC;
for_each_online_cpu(cpu) {
/*
* flush_cache_range() will only fully flush icache if
* the VMA is executable, otherwise we must invalidate
* ASID without it appearing to has_valid_asid() as if
* mm has been completely unused by that CPU.
*/
if (cpu != smp_processor_id() && cpu_context(cpu, mm))
cpu_context(cpu, mm) = 0;
cpu_context(cpu, mm) = !exec;
}
}
local_flush_tlb_range(vma, start, end);
@ -560,8 +562,14 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
unsigned int cpu;
for_each_online_cpu(cpu) {
/*
* flush_cache_page() only does partial flushes, so
* invalidate ASID without it appearing to
* has_valid_asid() as if mm has been completely unused
* by that CPU.
*/
if (cpu != smp_processor_id() && cpu_context(cpu, vma->vm_mm))
cpu_context(cpu, vma->vm_mm) = 0;
cpu_context(cpu, vma->vm_mm) = 1;
}
}
local_flush_tlb_page(vma, page);

4
arch/mips/kernel/traps.c
View file

@ -704,6 +704,7 @@ asmlinkage void do_ov(struct pt_regs *regs)
int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
{
struct siginfo si = { 0 };
struct vm_area_struct *vma;
switch (sig) {
case 0:
@ -744,7 +745,8 @@ int process_fpemu_return(int sig, void __user *fault_addr, unsigned long fcr31)
si.si_addr = fault_addr;
si.si_signo = sig;
down_read(&current->mm->mmap_sem);
if (find_vma(current->mm, (unsigned long)fault_addr))
vma = find_vma(current->mm, (unsigned long)fault_addr);
if (vma && (vma->vm_start <= (unsigned long)fault_addr))
si.si_code = SEGV_ACCERR;
else
si.si_code = SEGV_MAPERR;

10
arch/mips/kernel/vdso.c
View file

@ -107,6 +107,16 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (down_write_killable(&mm->mmap_sem))
return -EINTR;
/* Map delay slot emulation page */
base = mmap_region(NULL, STACK_TOP, PAGE_SIZE,
VM_READ|VM_WRITE|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
0);
if (IS_ERR_VALUE(base)) {
ret = base;
goto out;
}
/*
* Determine total area size. This includes the VDSO data itself, the
* data page, and the GIC user page if present. Always create a mapping

31
arch/mips/lantiq/irq.c
View file

@ -66,7 +66,7 @@ int gic_present;
#endif
static int exin_avail;
static struct resource ltq_eiu_irq[MAX_EIU];
static u32 ltq_eiu_irq[MAX_EIU];
static void __iomem *ltq_icu_membase[MAX_IM];
static void __iomem *ltq_eiu_membase;
static struct irq_domain *ltq_domain;
@ -75,7 +75,7 @@ static int ltq_perfcount_irq;
int ltq_eiu_get_irq(int exin)
{
if (exin < exin_avail)
return ltq_eiu_irq[exin].start;
return ltq_eiu_irq[exin];
return -1;
}
@ -125,8 +125,8 @@ static int ltq_eiu_settype(struct irq_data *d, unsigned int type)
{
int i;
for (i = 0; i < MAX_EIU; i++) {
if (d->hwirq == ltq_eiu_irq[i].start) {
for (i = 0; i < exin_avail; i++) {
if (d->hwirq == ltq_eiu_irq[i]) {
int val = 0;
int edge = 0;
@ -173,8 +173,8 @@ static unsigned int ltq_startup_eiu_irq(struct irq_data *d)
int i;
ltq_enable_irq(d);
for (i = 0; i < MAX_EIU; i++) {
if (d->hwirq == ltq_eiu_irq[i].start) {
for (i = 0; i < exin_avail; i++) {
if (d->hwirq == ltq_eiu_irq[i]) {
/* by default we are low level triggered */
ltq_eiu_settype(d, IRQF_TRIGGER_LOW);
/* clear all pending */
@ -195,8 +195,8 @@ static void ltq_shutdown_eiu_irq(struct irq_data *d)
int i;
ltq_disable_irq(d);
for (i = 0; i < MAX_EIU; i++) {
if (d->hwirq == ltq_eiu_irq[i].start) {
for (i = 0; i < exin_avail; i++) {
if (d->hwirq == ltq_eiu_irq[i]) {
/* disable */
ltq_eiu_w32(ltq_eiu_r32(LTQ_EIU_EXIN_INEN) & ~BIT(i),
LTQ_EIU_EXIN_INEN);
@ -206,7 +206,7 @@ static void ltq_shutdown_eiu_irq(struct irq_data *d)
}
static struct irq_chip ltq_irq_type = {
"icu",
.name = "icu",
.irq_enable = ltq_enable_irq,
.irq_disable = ltq_disable_irq,
.irq_unmask = ltq_enable_irq,
@ -216,7 +216,7 @@ static struct irq_chip ltq_irq_type = {
};
static struct irq_chip ltq_eiu_type = {
"eiu",
.name = "eiu",
.irq_startup = ltq_startup_eiu_irq,
.irq_shutdown = ltq_shutdown_eiu_irq,
.irq_enable = ltq_enable_irq,
@ -341,10 +341,10 @@ static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
return 0;
for (i = 0; i < exin_avail; i++)
if (hw == ltq_eiu_irq[i].start)
if (hw == ltq_eiu_irq[i])
chip = &ltq_eiu_type;
irq_set_chip_and_handler(hw, chip, handle_level_irq);
irq_set_chip_and_handler(irq, chip, handle_level_irq);
return 0;
}
@ -439,14 +439,15 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
eiu_node = of_find_compatible_node(NULL, NULL, "lantiq,eiu-xway");
if (eiu_node && !of_address_to_resource(eiu_node, 0, &res)) {
/* find out how many external irq sources we have */
exin_avail = of_irq_count(eiu_node);
exin_avail = of_property_count_u32_elems(eiu_node,
"lantiq,eiu-irqs");
if (exin_avail > MAX_EIU)
exin_avail = MAX_EIU;
ret = of_irq_to_resource_table(eiu_node,
ret = of_property_read_u32_array(eiu_node, "lantiq,eiu-irqs",
ltq_eiu_irq, exin_avail);
if (ret != exin_avail)
if (ret)
panic("failed to load external irq resources");
if (!request_mem_region(res.start, resource_size(&res),

4
arch/mips/lantiq/prom.c
View file

@ -74,8 +74,8 @@ void __init plat_mem_setup(void)
set_io_port_base((unsigned long) KSEG1);
if (fw_arg0 == -2) /* UHI interface */
dtb = (void *)fw_arg1;
if (fw_passed_dtb) /* UHI interface */
dtb = (void *)fw_passed_dtb;
else if (__dtb_start != __dtb_end)
dtb = (void *)__dtb_start;
else

14
arch/mips/loongson64/loongson-3/hpet.c
View file

@ -13,8 +13,8 @@
#define SMBUS_PCI_REG64 0x64
#define SMBUS_PCI_REGB4 0xb4
#define HPET_MIN_CYCLES 64
#define HPET_MIN_PROG_DELTA (HPET_MIN_CYCLES + (HPET_MIN_CYCLES >> 1))
#define HPET_MIN_CYCLES 16
#define HPET_MIN_PROG_DELTA (HPET_MIN_CYCLES * 12)
static DEFINE_SPINLOCK(hpet_lock);
DEFINE_PER_CPU(struct clock_event_device, hpet_clockevent_device);
@ -157,14 +157,14 @@ static int hpet_tick_resume(struct clock_event_device *evt)
static int hpet_next_event(unsigned long delta,
struct clock_event_device *evt)
{
unsigned int cnt;
int res;
u32 cnt;
s32 res;
cnt = hpet_read(HPET_COUNTER);
cnt += delta;
cnt += (u32) delta;
hpet_write(HPET_T0_CMP, cnt);
res = (int)(cnt - hpet_read(HPET_COUNTER));
res = (s32)(cnt - hpet_read(HPET_COUNTER));
return res < HPET_MIN_CYCLES ? -ETIME : 0;
}
@ -230,7 +230,7 @@ void __init setup_hpet_timer(void)
cd = &per_cpu(hpet_clockevent_device, cpu);
cd->name = "hpet";
cd->rating = 320;
cd->rating = 100;
cd->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
cd->set_state_shutdown = hpet_set_state_shutdown;
cd->set_state_periodic = hpet_set_state_periodic;

1
arch/mips/loongson64/loongson-3/smp.c
View file

@ -417,6 +417,7 @@ static int loongson3_cpu_disable(void)
return -EBUSY;
set_cpu_online(cpu, false);
calculate_cpu_foreign_map();
cpumask_clear_cpu(cpu, &cpu_callin_map);
local_irq_save(flags);
fixup_irqs();

8
arch/mips/math-emu/cp1emu.c
View file

@ -434,8 +434,8 @@ static int microMIPS32_to_MIPS32(union mips_instruction *insn_ptr)
* a single subroutine should be used across both
* modules.
*/
static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc)
int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc)
{
union mips_instruction insn = (union mips_instruction)dec_insn.insn;
unsigned int fcr31;
@ -1268,7 +1268,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
* instruction in the dslot.
*/
sig = mips_dsemul(xcp, ir,
contpc);
bcpc, contpc);
if (sig < 0)
break;
if (sig)
@ -1323,7 +1323,7 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
* Single step the non-cp1
* instruction in the dslot
*/
sig = mips_dsemul(xcp, ir, contpc);
sig = mips_dsemul(xcp, ir, bcpc, contpc);
if (sig < 0)
break;
if (sig)

333
arch/mips/math-emu/dsemul.c
View file

@ -1,3 +1,6 @@
#include <linux/err.h>
#include <linux/slab.h>
#include <asm/branch.h>
#include <asm/cacheflush.h>
#include <asm/fpu_emulator.h>
@ -5,43 +8,211 @@
#include <asm/mipsregs.h>
#include <asm/uaccess.h>
#include "ieee754.h"
/*
* Emulate the arbitrary instruction ir at xcp->cp0_epc. Required when
* we have to emulate the instruction in a COP1 branch delay slot. Do
* not change cp0_epc due to the instruction
/**
* struct emuframe - The 'emulation' frame structure
* @emul: The instruction to 'emulate'.
* @badinst: A break instruction to cause a return to the kernel.
*
* According to the spec:
* 1) it shouldn't be a branch :-)
* 2) it can be a COP instruction :-(
* 3) if we are tring to run a protected memory space we must take
* special care on memory access instructions :-(
* This structure defines the frames placed within the delay slot emulation
* page in response to a call to mips_dsemul(). Each thread may be allocated
* only one frame at any given time. The kernel stores within it the
* instruction to be 'emulated' followed by a break instruction, then
* executes the frame in user mode. The break causes a trap to the kernel
* which leads to do_dsemulret() being called unless the instruction in
* @emul causes a trap itself, is a branch, or a signal is delivered to
* the thread. In these cases the allocated frame will either be reused by
* a subsequent delay slot 'emulation', or be freed during signal delivery or
* upon thread exit.
*
* This approach is used because:
*
* - Actually emulating all instructions isn't feasible. We would need to
* be able to handle instructions from all revisions of the MIPS ISA,
* all ASEs & all vendor instruction set extensions. This would be a
* whole lot of work & continual maintenance burden as new instructions
* are introduced, and in the case of some vendor extensions may not
* even be possible. Thus we need to take the approach of actually
* executing the instruction.
*
* - We must execute the instruction within user context. If we were to
* execute the instruction in kernel mode then it would have access to
* kernel resources without very careful checks, leaving us with a
* high potential for security or stability issues to arise.
*
* - We used to place the frame on the users stack, but this requires
* that the stack be executable. This is bad for security so the
* per-process page is now used instead.
*
* - The instruction in @emul may be something entirely invalid for a
* delay slot. The user may (intentionally or otherwise) place a branch
* in a delay slot, or a kernel mode instruction, or something else
* which generates an exception. Thus we can't rely upon the break in
* @badinst always being hit. For this reason we track the index of the
* frame allocated to each thread, allowing us to clean it up at later
* points such as signal delivery or thread exit.
*
* - The user may generate a fake struct emuframe if they wish, invoking
* the BRK_MEMU break instruction themselves. We must therefore not
* trust that BRK_MEMU means there's actually a valid frame allocated
* to the thread, and must not allow the user to do anything they
* couldn't already.
*/
/*
* "Trampoline" return routine to catch exception following
* execution of delay-slot instruction execution.
*/
struct emuframe {
mips_instruction emul;
mips_instruction badinst;
mips_instruction cookie;
unsigned long epc;
};
/*
* Set up an emulation frame for instruction IR, from a delay slot of
* a branch jumping to CPC. Return 0 if successful, -1 if no emulation
* required, otherwise a signal number causing a frame setup failure.
*/
int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
static const int emupage_frame_count = PAGE_SIZE / sizeof(struct emuframe);
static inline __user struct emuframe *dsemul_page(void)
{
return (__user struct emuframe *)STACK_TOP;
}
static int alloc_emuframe(void)
{
mm_context_t *mm_ctx = &current->mm->context;
int idx;
retry:
spin_lock(&mm_ctx->bd_emupage_lock);
/* Ensure we have an allocation bitmap */
if (!mm_ctx->bd_emupage_allocmap) {
mm_ctx->bd_emupage_allocmap =
kcalloc(BITS_TO_LONGS(emupage_frame_count),
sizeof(unsigned long),
GFP_ATOMIC);
if (!mm_ctx->bd_emupage_allocmap) {
idx = BD_EMUFRAME_NONE;
goto out_unlock;
}
}
/* Attempt to allocate a single bit/frame */
idx = bitmap_find_free_region(mm_ctx->bd_emupage_allocmap,
emupage_frame_count, 0);
if (idx < 0) {
/*
* Failed to allocate a frame. We'll wait until one becomes
* available. We unlock the page so that other threads actually
* get the opportunity to free their frames, which means
* technically the result of bitmap_full may be incorrect.
* However the worst case is that we repeat all this and end up
* back here again.
*/
spin_unlock(&mm_ctx->bd_emupage_lock);
if (!wait_event_killable(mm_ctx->bd_emupage_queue,
!bitmap_full(mm_ctx->bd_emupage_allocmap,
emupage_frame_count)))
goto retry;
/* Received a fatal signal - just give in */
return BD_EMUFRAME_NONE;
}
/* Success! */
pr_debug("allocate emuframe %d to %d\n", idx, current->pid);
out_unlock:
spin_unlock(&mm_ctx->bd_emupage_lock);
return idx;
}
static void free_emuframe(int idx, struct mm_struct *mm)
{
mm_context_t *mm_ctx = &mm->context;
spin_lock(&mm_ctx->bd_emupage_lock);
pr_debug("free emuframe %d from %d\n", idx, current->pid);
bitmap_clear(mm_ctx->bd_emupage_allocmap, idx, 1);
/* If some thread is waiting for a frame, now's its chance */
wake_up(&mm_ctx->bd_emupage_queue);
spin_unlock(&mm_ctx->bd_emupage_lock);
}
static bool within_emuframe(struct pt_regs *regs)
{
unsigned long base = (unsigned long)dsemul_page();
if (regs->cp0_epc < base)
return false;
if (regs->cp0_epc >= (base + PAGE_SIZE))
return false;
return true;
}
bool dsemul_thread_cleanup(struct task_struct *tsk)
{
int fr_idx;
/* Clear any allocated frame, retrieving its index */
fr_idx = atomic_xchg(&tsk->thread.bd_emu_frame, BD_EMUFRAME_NONE);
/* If no frame was allocated, we're done */
if (fr_idx == BD_EMUFRAME_NONE)
return false;
task_lock(tsk);
/* Free the frame that this thread had allocated */
if (tsk->mm)
free_emuframe(fr_idx, tsk->mm);
task_unlock(tsk);
return true;
}
bool dsemul_thread_rollback(struct pt_regs *regs)
{
struct emuframe __user *fr;
int fr_idx;
/* Do nothing if we're not executing from a frame */
if (!within_emuframe(regs))
return false;
/* Find the frame being executed */
fr_idx = atomic_read(&current->thread.bd_emu_frame);
if (fr_idx == BD_EMUFRAME_NONE)
return false;
fr = &dsemul_page()[fr_idx];
/*
* If the PC is at the emul instruction, roll back to the branch. If
* PC is at the badinst (break) instruction, we've already emulated the
* instruction so progress to the continue PC. If it's anything else
* then something is amiss & the user has branched into some other area
* of the emupage - we'll free the allocated frame anyway.
*/
if (msk_isa16_mode(regs->cp0_epc) == (unsigned long)&fr->emul)
regs->cp0_epc = current->thread.bd_emu_branch_pc;
else if (msk_isa16_mode(regs->cp0_epc) == (unsigned long)&fr->badinst)
regs->cp0_epc = current->thread.bd_emu_cont_pc;
atomic_set(&current->thread.bd_emu_frame, BD_EMUFRAME_NONE);
free_emuframe(fr_idx, current->mm);
return true;
}
void dsemul_mm_cleanup(struct mm_struct *mm)
{
mm_context_t *mm_ctx = &mm->context;
kfree(mm_ctx->bd_emupage_allocmap);
}
int mips_dsemul(struct pt_regs *regs, mips_instruction ir,
unsigned long branch_pc, unsigned long cont_pc)
{
int isa16 = get_isa16_mode(regs->cp0_epc);
mips_instruction break_math;
struct emuframe __user *fr;
int err;
int err, fr_idx;
/* NOP is easy */
if (ir == 0)
@ -68,30 +239,20 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
}
}
pr_debug("dsemul %lx %lx\n", regs->cp0_epc, cpc);
pr_debug("dsemul 0x%08lx cont at 0x%08lx\n", regs->cp0_epc, cont_pc);
/*
* The strategy is to push the instruction onto the user stack
* and put a trap after it which we can catch and jump to
* the required address any alternative apart from full
* instruction emulation!!.
*
* Algorithmics used a system call instruction, and
* borrowed that vector. MIPS/Linux version is a bit
* more heavyweight in the interests of portability and
* multiprocessor support. For Linux we use a BREAK 514
* instruction causing a breakpoint exception.
*/
/* Allocate a frame if we don't already have one */
fr_idx = atomic_read(&current->thread.bd_emu_frame);
if (fr_idx == BD_EMUFRAME_NONE)
fr_idx = alloc_emuframe();
if (fr_idx == BD_EMUFRAME_NONE)
return SIGBUS;
fr = &dsemul_page()[fr_idx];
/* Retrieve the appropriately encoded break instruction */
break_math = BREAK_MATH(isa16);
/* Ensure that the two instructions are in the same cache line */
fr = (struct emuframe __user *)
((regs->regs[29] - sizeof(struct emuframe)) & ~0x7);
/* Verify that the stack pointer is not completely insane */
if (unlikely(!access_ok(VERIFY_WRITE, fr, sizeof(struct emuframe))))
return SIGBUS;
/* Write the instructions to the frame */
if (isa16) {
err = __put_user(ir >> 16,
(u16 __user *)(&fr->emul));
@ -106,84 +267,36 @@ int mips_dsemul(struct pt_regs *regs, mips_instruction ir, unsigned long cpc)
err |= __put_user(break_math, &fr->badinst);
}
err |= __put_user((mips_instruction)BD_COOKIE, &fr->cookie);
err |= __put_user(cpc, &fr->epc);
if (unlikely(err)) {
MIPS_FPU_EMU_INC_STATS(errors);
free_emuframe(fr_idx, current->mm);
return SIGBUS;
}
/* Record the PC of the branch, PC to continue from & frame index */
current->thread.bd_emu_branch_pc = branch_pc;
current->thread.bd_emu_cont_pc = cont_pc;
atomic_set(&current->thread.bd_emu_frame, fr_idx);
/* Change user register context to execute the frame */
regs->cp0_epc = (unsigned long)&fr->emul | isa16;
/* Ensure the icache observes our newly written frame */
flush_cache_sigtramp((unsigned long)&fr->emul);
return 0;
}
int do_dsemulret(struct pt_regs *xcp)
bool do_dsemulret(struct pt_regs *xcp)
{
int isa16 = get_isa16_mode(xcp->cp0_epc);
struct emuframe __user *fr;
unsigned long epc;
u32 insn, cookie;
int err = 0;
u16 instr[2];
fr = (struct emuframe __user *)
(msk_isa16_mode(xcp->cp0_epc) - sizeof(mips_instruction));
/*
* If we can't even access the area, something is very wrong, but we'll
* leave that to the default handling
*/
if (!access_ok(VERIFY_READ, fr, sizeof(struct emuframe)))
return 0;
/*
* Do some sanity checking on the stackframe:
*
* - Is the instruction pointed to by the EPC an BREAK_MATH?
* - Is the following memory word the BD_COOKIE?
*/
if (isa16) {
err = __get_user(instr[0],
(u16 __user *)(&fr->badinst));
err |= __get_user(instr[1],
(u16 __user *)((long)(&fr->badinst) + 2));
insn = (instr[0] << 16) | instr[1];
} else {
err = __get_user(insn, &fr->badinst);
}
err |= __get_user(cookie, &fr->cookie);
if (unlikely(err ||
insn != BREAK_MATH(isa16) || cookie != BD_COOKIE)) {
/* Cleanup the allocated frame, returning if there wasn't one */
if (!dsemul_thread_cleanup(current)) {
MIPS_FPU_EMU_INC_STATS(errors);
return 0;
}
/*
* At this point, we are satisfied that it's a BD emulation trap. Yes,
* a user might have deliberately put two malformed and useless
* instructions in a row in his program, in which case he's in for a
* nasty surprise - the next instruction will be treated as a
* continuation address! Alas, this seems to be the only way that we
* can handle signals, recursion, and longjmps() in the context of
* emulating the branch delay instruction.
*/
pr_debug("dsemulret\n");
if (__get_user(epc, &fr->epc)) { /* Saved EPC */
/* This is not a good situation to be in */
force_sig(SIGBUS, current);
return 0;
return false;
}
/* Set EPC to return to post-branch instruction */
xcp->cp0_epc = epc;
MIPS_FPU_EMU_INC_STATS(ds_emul);
return 1;
xcp->cp0_epc = current->thread.bd_emu_cont_pc;
pr_debug("dsemulret to 0x%08lx\n", xcp->cp0_epc);
return true;
}

284
arch/mips/mm/c-r4k.c
View file

@ -39,6 +39,51 @@
#include <asm/dma-coherence.h>
#include <asm/mips-cm.h>
/*
* Bits describing what cache ops an SMP callback function may perform.
*
* R4K_HIT - Virtual user or kernel address based cache operations. The
* active_mm must be checked before using user addresses, falling
* back to kmap.
* R4K_INDEX - Index based cache operations.
*/
#define R4K_HIT BIT(0)
#define R4K_INDEX BIT(1)
/**
* r4k_op_needs_ipi() - Decide if a cache op needs to be done on every core.
* @type: Type of cache operations (R4K_HIT or R4K_INDEX).
*
* Decides whether a cache op needs to be performed on every core in the system.
* This may change depending on the @type of cache operation, as well as the set
* of online CPUs, so preemption should be disabled by the caller to prevent CPU
* hotplug from changing the result.
*
* Returns: 1 if the cache operation @type should be done on every core in
* the system.
* 0 if the cache operation @type is globalized and only needs to
* be performed on a simple CPU.
*/
static inline bool r4k_op_needs_ipi(unsigned int type)
{
/* The MIPS Coherence Manager (CM) globalizes address-based cache ops */
if (type == R4K_HIT && mips_cm_present())
return false;
/*
* Hardware doesn't globalize the required cache ops, so SMP calls may
* be needed, but only if there are foreign CPUs (non-siblings with
* separate caches).
*/
/* cpu_foreign_map[] undeclared when !CONFIG_SMP */
#ifdef CONFIG_SMP
return !cpumask_empty(&cpu_foreign_map[0]);
#else
return false;
#endif
}
/*
* Special Variant of smp_call_function for use by cache functions:
*
@ -48,30 +93,17 @@
* primary cache.
* o doesn't disable interrupts on the local CPU
*/
static inline void r4k_on_each_cpu(void (*func) (void *info), void *info)
static inline void r4k_on_each_cpu(unsigned int type,
void (*func)(void *info), void *info)
{
preempt_disable();
/*
* The Coherent Manager propagates address-based cache ops to other
* cores but not index-based ops. However, r4k_on_each_cpu is used
* in both cases so there is no easy way to tell what kind of op is
* executed to the other cores. The best we can probably do is
* to restrict that call when a CM is not present because both
* CM-based SMP protocols (CMP & CPS) restrict index-based cache ops.
*/
if (!mips_cm_present())
smp_call_function_many(&cpu_foreign_map, func, info, 1);
if (r4k_op_needs_ipi(type))
smp_call_function_many(&cpu_foreign_map[smp_processor_id()],
func, info, 1);
func(info);
preempt_enable();
}
#if defined(CONFIG_MIPS_CMP) || defined(CONFIG_MIPS_CPS)
#define cpu_has_safe_index_cacheops 0
#else
#define cpu_has_safe_index_cacheops 1
#endif
/*
* Must die.
*/
@ -462,22 +494,44 @@ static inline void local_r4k___flush_cache_all(void * args)
static void r4k___flush_cache_all(void)
{
r4k_on_each_cpu(local_r4k___flush_cache_all, NULL);
r4k_on_each_cpu(R4K_INDEX, local_r4k___flush_cache_all, NULL);
}
static inline int has_valid_asid(const struct mm_struct *mm)
/**
* has_valid_asid() - Determine if an mm already has an ASID.
* @mm: Memory map.
* @type: R4K_HIT or R4K_INDEX, type of cache op.
*
* Determines whether @mm already has an ASID on any of the CPUs which cache ops
* of type @type within an r4k_on_each_cpu() call will affect. If
* r4k_on_each_cpu() does an SMP call to a single VPE in each core, then the
* scope of the operation is confined to sibling CPUs, otherwise all online CPUs
* will need to be checked.
*
* Must be called in non-preemptive context.
*
* Returns: 1 if the CPUs affected by @type cache ops have an ASID for @mm.
* 0 otherwise.
*/
static inline int has_valid_asid(const struct mm_struct *mm, unsigned int type)
{
#ifdef CONFIG_MIPS_MT_SMP
int i;
unsigned int i;
const cpumask_t *mask = cpu_present_mask;
for_each_online_cpu(i)
/* cpu_sibling_map[] undeclared when !CONFIG_SMP */
#ifdef CONFIG_SMP
/*
* If r4k_on_each_cpu does SMP calls, it does them to a single VPE in
* each foreign core, so we only need to worry about siblings.
* Otherwise we need to worry about all present CPUs.
*/
if (r4k_op_needs_ipi(type))
mask = &cpu_sibling_map[smp_processor_id()];
#endif
for_each_cpu(i, mask)
if (cpu_context(i, mm))
return 1;
return 0;
#else
return cpu_context(smp_processor_id(), mm);
#endif
}
static void r4k__flush_cache_vmap(void)
@ -490,12 +544,16 @@ static void r4k__flush_cache_vunmap(void)
r4k_blast_dcache();
}
/*
* Note: flush_tlb_range() assumes flush_cache_range() sufficiently flushes
* whole caches when vma is executable.
*/
static inline void local_r4k_flush_cache_range(void * args)
{
struct vm_area_struct *vma = args;
int exec = vma->vm_flags & VM_EXEC;
if (!(has_valid_asid(vma->vm_mm)))
if (!has_valid_asid(vma->vm_mm, R4K_INDEX))
return;
/*
@ -516,14 +574,14 @@ static void r4k_flush_cache_range(struct vm_area_struct *vma,
int exec = vma->vm_flags & VM_EXEC;
if (cpu_has_dc_aliases || exec)
r4k_on_each_cpu(local_r4k_flush_cache_range, vma);
r4k_on_each_cpu(R4K_INDEX, local_r4k_flush_cache_range, vma);
}
static inline void local_r4k_flush_cache_mm(void * args)
{
struct mm_struct *mm = args;
if (!has_valid_asid(mm))
if (!has_valid_asid(mm, R4K_INDEX))
return;
/*
@ -548,7 +606,7 @@ static void r4k_flush_cache_mm(struct mm_struct *mm)
if (!cpu_has_dc_aliases)
return;
r4k_on_each_cpu(local_r4k_flush_cache_mm, mm);
r4k_on_each_cpu(R4K_INDEX, local_r4k_flush_cache_mm, mm);
}
struct flush_cache_page_args {
@ -573,10 +631,10 @@ static inline void local_r4k_flush_cache_page(void *args)
void *vaddr;
/*
* If ownes no valid ASID yet, cannot possibly have gotten
* If owns no valid ASID yet, cannot possibly have gotten
* this page into the cache.
*/
if (!has_valid_asid(mm))
if (!has_valid_asid(mm, R4K_HIT))
return;
addr &= PAGE_MASK;
@ -643,7 +701,7 @@ static void r4k_flush_cache_page(struct vm_area_struct *vma,
args.addr = addr;
args.pfn = pfn;
r4k_on_each_cpu(local_r4k_flush_cache_page, &args);
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_cache_page, &args);
}
static inline void local_r4k_flush_data_cache_page(void * addr)
@ -656,18 +714,23 @@ static void r4k_flush_data_cache_page(unsigned long addr)
if (in_atomic())
local_r4k_flush_data_cache_page((void *)addr);
else
r4k_on_each_cpu(local_r4k_flush_data_cache_page, (void *) addr);
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_data_cache_page,
(void *) addr);
}
struct flush_icache_range_args {
unsigned long start;
unsigned long end;
unsigned int type;
};
static inline void local_r4k_flush_icache_range(unsigned long start, unsigned long end)
static inline void __local_r4k_flush_icache_range(unsigned long start,
unsigned long end,
unsigned int type)
{
if (!cpu_has_ic_fills_f_dc) {
if (end - start >= dcache_size) {
if (type == R4K_INDEX ||
(type & R4K_INDEX && end - start >= dcache_size)) {
r4k_blast_dcache();
} else {
R4600_HIT_CACHEOP_WAR_IMPL;
@ -675,7 +738,8 @@ static inline void local_r4k_flush_icache_range(unsigned long start, unsigned lo
}
}
if (end - start > icache_size)
if (type == R4K_INDEX ||
(type & R4K_INDEX && end - start > icache_size))
r4k_blast_icache();
else {
switch (boot_cpu_type()) {
@ -701,23 +765,52 @@ static inline void local_r4k_flush_icache_range(unsigned long start, unsigned lo
#endif
}
static inline void local_r4k_flush_icache_range(unsigned long start,
unsigned long end)
{
__local_r4k_flush_icache_range(start, end, R4K_HIT | R4K_INDEX);
}
static inline void local_r4k_flush_icache_range_ipi(void *args)
{
struct flush_icache_range_args *fir_args = args;
unsigned long start = fir_args->start;
unsigned long end = fir_args->end;
unsigned int type = fir_args->type;
local_r4k_flush_icache_range(start, end);
__local_r4k_flush_icache_range(start, end, type);
}
static void r4k_flush_icache_range(unsigned long start, unsigned long end)
{
struct flush_icache_range_args args;
unsigned long size, cache_size;
args.start = start;
args.end = end;
args.type = R4K_HIT | R4K_INDEX;
r4k_on_each_cpu(local_r4k_flush_icache_range_ipi, &args);
/*
* Indexed cache ops require an SMP call.
* Consider if that can or should be avoided.
*/
preempt_disable();
if (r4k_op_needs_ipi(R4K_INDEX) && !r4k_op_needs_ipi(R4K_HIT)) {
/*
* If address-based cache ops don't require an SMP call, then
* use them exclusively for small flushes.
*/
size = start - end;
cache_size = icache_size;
if (!cpu_has_ic_fills_f_dc) {
size *= 2;
cache_size += dcache_size;
}
if (size <= cache_size)
args.type &= ~R4K_INDEX;
}
r4k_on_each_cpu(args.type, local_r4k_flush_icache_range_ipi, &args);
preempt_enable();
instruction_hazard();
}
@ -744,7 +837,7 @@ static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size)
* subset property so we have to flush the primary caches
* explicitly
*/
if (cpu_has_safe_index_cacheops && size >= dcache_size) {
if (size >= dcache_size) {
r4k_blast_dcache();
} else {
R4600_HIT_CACHEOP_WAR_IMPL;
@ -781,7 +874,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
return;
}
if (cpu_has_safe_index_cacheops && size >= dcache_size) {
if (size >= dcache_size) {
r4k_blast_dcache();
} else {
R4600_HIT_CACHEOP_WAR_IMPL;
@ -794,25 +887,76 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
}
#endif /* CONFIG_DMA_NONCOHERENT || CONFIG_DMA_MAYBE_COHERENT */
struct flush_cache_sigtramp_args {
struct mm_struct *mm;
struct page *page;
unsigned long addr;
};
/*
* While we're protected against bad userland addresses we don't care
* very much about what happens in that case. Usually a segmentation
* fault will dump the process later on anyway ...
*/
static void local_r4k_flush_cache_sigtramp(void * arg)
static void local_r4k_flush_cache_sigtramp(void *args)
{
struct flush_cache_sigtramp_args *fcs_args = args;
unsigned long addr = fcs_args->addr;
struct page *page = fcs_args->page;
struct mm_struct *mm = fcs_args->mm;
int map_coherent = 0;
void *vaddr;
unsigned long ic_lsize = cpu_icache_line_size();
unsigned long dc_lsize = cpu_dcache_line_size();
unsigned long sc_lsize = cpu_scache_line_size();
unsigned long addr = (unsigned long) arg;
/*
* If owns no valid ASID yet, cannot possibly have gotten
* this page into the cache.
*/
if (!has_valid_asid(mm, R4K_HIT))
return;
if (mm == current->active_mm) {
vaddr = NULL;
} else {
/*
* Use kmap_coherent or kmap_atomic to do flushes for
* another ASID than the current one.
*/
map_coherent = (cpu_has_dc_aliases &&
page_mapcount(page) &&
!Page_dcache_dirty(page));
if (map_coherent)
vaddr = kmap_coherent(page, addr);
else
vaddr = kmap_atomic(page);
addr = (unsigned long)vaddr + (addr & ~PAGE_MASK);
}
R4600_HIT_CACHEOP_WAR_IMPL;
if (dc_lsize)
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
if (!cpu_icache_snoops_remote_store && scache_size)
protected_writeback_scache_line(addr & ~(sc_lsize - 1));
if (!cpu_has_ic_fills_f_dc) {
if (dc_lsize)
vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1))
: protected_writeback_dcache_line(
addr & ~(dc_lsize - 1));
if (!cpu_icache_snoops_remote_store && scache_size)
vaddr ? flush_scache_line(addr & ~(sc_lsize - 1))
: protected_writeback_scache_line(
addr & ~(sc_lsize - 1));
}
if (ic_lsize)
protected_flush_icache_line(addr & ~(ic_lsize - 1));
vaddr ? flush_icache_line(addr & ~(ic_lsize - 1))
: protected_flush_icache_line(addr & ~(ic_lsize - 1));
if (vaddr) {
if (map_coherent)
kunmap_coherent();
else
kunmap_atomic(vaddr);
}
if (MIPS4K_ICACHE_REFILL_WAR) {
__asm__ __volatile__ (
".set push\n\t"
@ -837,7 +981,23 @@ static void local_r4k_flush_cache_sigtramp(void * arg)
static void r4k_flush_cache_sigtramp(unsigned long addr)
{
r4k_on_each_cpu(local_r4k_flush_cache_sigtramp, (void *) addr);
struct flush_cache_sigtramp_args args;
int npages;
down_read(&current->mm->mmap_sem);
npages = get_user_pages_fast(addr, 1, 0, &args.page);
if (npages < 1)
goto out;
args.mm = current->mm;
args.addr = addr;
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_cache_sigtramp, &args);
put_page(args.page);
out:
up_read(&current->mm->mmap_sem);
}
static void r4k_flush_icache_all(void)
@ -851,6 +1011,15 @@ struct flush_kernel_vmap_range_args {
int size;
};
static inline void local_r4k_flush_kernel_vmap_range_index(void *args)
{
/*
* Aliases only affect the primary caches so don't bother with
* S-caches or T-caches.
*/
r4k_blast_dcache();
}
static inline void local_r4k_flush_kernel_vmap_range(void *args)
{
struct flush_kernel_vmap_range_args *vmra = args;
@ -861,12 +1030,8 @@ static inline void local_r4k_flush_kernel_vmap_range(void *args)
* Aliases only affect the primary caches so don't bother with
* S-caches or T-caches.
*/
if (cpu_has_safe_index_cacheops && size >= dcache_size)
r4k_blast_dcache();
else {
R4600_HIT_CACHEOP_WAR_IMPL;
blast_dcache_range(vaddr, vaddr + size);
}
R4600_HIT_CACHEOP_WAR_IMPL;
blast_dcache_range(vaddr, vaddr + size);
}
static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size)
@ -876,7 +1041,12 @@ static void r4k_flush_kernel_vmap_range(unsigned long vaddr, int size)
args.vaddr = (unsigned long) vaddr;
args.size = size;
r4k_on_each_cpu(local_r4k_flush_kernel_vmap_range, &args);
if (size >= dcache_size)
r4k_on_each_cpu(R4K_INDEX,
local_r4k_flush_kernel_vmap_range_index, NULL);
else
r4k_on_each_cpu(R4K_HIT, local_r4k_flush_kernel_vmap_range,
&args);
}
static inline void rm7k_erratum31(void)

4
arch/mips/mm/sc-debugfs.c
View file

@ -73,8 +73,8 @@ static int __init sc_debugfs_init(void)
file = debugfs_create_file("prefetch", S_IRUGO | S_IWUSR, dir,
NULL, &sc_prefetch_fops);
if (IS_ERR(file))
return PTR_ERR(file);
if (!file)
return -ENOMEM;
return 0;
}

2
arch/mips/mm/sc-rm7k.c
View file

@ -161,7 +161,7 @@ static void rm7k_tc_disable(void)
local_irq_save(flags);
blast_rm7k_tcache();
clear_c0_config(RM7K_CONF_TE);
local_irq_save(flags);
local_irq_restore(flags);
}
static void rm7k_sc_disable(void)

2
arch/mips/mm/tlbex.c
View file

@ -888,7 +888,7 @@ build_get_pgd_vmalloc64(u32 **p, struct uasm_label **l, struct uasm_reloc **r,
}
}
if (!did_vmalloc_branch) {
if (uasm_in_compat_space_p(swpd) && !uasm_rel_lo(swpd)) {
if (single_insn_swpd) {
uasm_il_b(p, r, label_vmalloc_done);
uasm_i_lui(p, ptr, uasm_rel_hi(swpd));
} else {

2
arch/mips/mm/uasm-mips.c
View file

@ -65,7 +65,7 @@ static struct insn insn_table[] = {
#ifndef CONFIG_CPU_MIPSR6
{ insn_cache, M(cache_op, 0, 0, 0, 0, 0), RS | RT | SIMM },
#else
{ insn_cache, M6(cache_op, 0, 0, 0, cache6_op), RS | RT | SIMM9 },
{ insn_cache, M6(spec3_op, 0, 0, 0, cache6_op), RS | RT | SIMM9 },
#endif
{ insn_cfc1, M(cop1_op, cfc_op, 0, 0, 0, 0), RT | RD },
{ insn_cfcmsa, M(msa_op, 0, msa_cfc_op, 0, 0, msa_elm_op), RD | RE },

6
arch/mips/mm/uasm.c
View file

@ -378,11 +378,7 @@ UASM_EXPORT_SYMBOL(ISAFUNC(uasm_build_label));
int ISAFUNC(uasm_in_compat_space_p)(long addr)
{
/* Is this address in 32bit compat space? */
#ifdef CONFIG_64BIT
return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
#else
return 1;
#endif
return addr == (int)addr;
}
UASM_EXPORT_SYMBOL(ISAFUNC(uasm_in_compat_space_p));

2
arch/mips/net/bpf_jit.c
View file

@ -1199,7 +1199,7 @@ void bpf_jit_compile(struct bpf_prog *fp)
memset(&ctx, 0, sizeof(ctx));
ctx.offsets = kcalloc(fp->len, sizeof(*ctx.offsets), GFP_KERNEL);
ctx.offsets = kcalloc(fp->len + 1, sizeof(*ctx.offsets), GFP_KERNEL);
if (ctx.offsets == NULL)
return;

4
arch/mips/pic32/pic32mzda/init.c
View file

@ -33,8 +33,8 @@ static ulong get_fdtaddr(void)
{
ulong ftaddr = 0;
if ((fw_arg0 == -2) && fw_arg1 && !fw_arg2 && !fw_arg3)
return (ulong)fw_arg1;
if (fw_passed_dtb && !fw_arg2 && !fw_arg3)
return (ulong)fw_passed_dtb;
if (__dtb_start < __dtb_end)
ftaddr = (ulong)__dtb_start;

25
arch/mips/pistachio/init.c
View file

@ -59,29 +59,6 @@ const char *get_system_type(void)
return sys_type;
}
static void __init plat_setup_iocoherency(void)
{
/*
* Kernel has been configured with software coherency
* but we might choose to turn it off and use hardware
* coherency instead.
*/
if (mips_cm_numiocu() != 0) {
/* Nothing special needs to be done to enable coherency */
pr_info("CMP IOCU detected\n");
hw_coherentio = 1;
if (coherentio == 0)
pr_info("Hardware DMA cache coherency disabled\n");
else
pr_info("Hardware DMA cache coherency enabled\n");
} else {
if (coherentio == 1)
pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n");
else
pr_info("Software DMA cache coherency enabled\n");
}
}
void __init *plat_get_fdt(void)
{
if (fw_arg0 != -2)
@ -92,8 +69,6 @@ void __init *plat_get_fdt(void)
void __init plat_mem_setup(void)
{
__dt_setup_arch(plat_get_fdt());
plat_setup_iocoherency();
}
#define DEFAULT_CPC_BASE_ADDR 0x1bde0000

2
arch/mips/ralink/mt7620.c
View file

@ -175,7 +175,7 @@ static struct rt2880_pmx_func spi_cs1_grp_mt7628[] = {
};
static struct rt2880_pmx_func spis_grp_mt7628[] = {
FUNC("pwm", 3, 14, 4),
FUNC("pwm_uart2", 3, 14, 4),
FUNC("util", 2, 14, 4),
FUNC("gpio", 1, 14, 4),
FUNC("spis", 0, 14, 4),

22
drivers/ssb/driver_gpio.c
View file

@ -23,7 +23,7 @@
**************************************************/
#if IS_ENABLED(CONFIG_SSB_EMBEDDED)
static int ssb_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
static int ssb_gpio_to_irq(struct gpio_chip *chip, unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -38,14 +38,14 @@ static int ssb_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
* ChipCommon
**************************************************/
static int ssb_gpio_chipco_get_value(struct gpio_chip *chip, unsigned gpio)
static int ssb_gpio_chipco_get_value(struct gpio_chip *chip, unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
return !!ssb_chipco_gpio_in(&bus->chipco, 1 << gpio);
}
static void ssb_gpio_chipco_set_value(struct gpio_chip *chip, unsigned gpio,
static void ssb_gpio_chipco_set_value(struct gpio_chip *chip, unsigned int gpio,
int value)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -54,7 +54,7 @@ static void ssb_gpio_chipco_set_value(struct gpio_chip *chip, unsigned gpio,
}
static int ssb_gpio_chipco_direction_input(struct gpio_chip *chip,
unsigned gpio)
unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -63,7 +63,7 @@ static int ssb_gpio_chipco_direction_input(struct gpio_chip *chip,
}
static int ssb_gpio_chipco_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
unsigned int gpio, int value)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -72,7 +72,7 @@ static int ssb_gpio_chipco_direction_output(struct gpio_chip *chip,
return 0;
}
static int ssb_gpio_chipco_request(struct gpio_chip *chip, unsigned gpio)
static int ssb_gpio_chipco_request(struct gpio_chip *chip, unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -85,7 +85,7 @@ static int ssb_gpio_chipco_request(struct gpio_chip *chip, unsigned gpio)
return 0;
}
static void ssb_gpio_chipco_free(struct gpio_chip *chip, unsigned gpio)
static void ssb_gpio_chipco_free(struct gpio_chip *chip, unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -256,14 +256,14 @@ static int ssb_gpio_chipco_init(struct ssb_bus *bus)
#ifdef CONFIG_SSB_DRIVER_EXTIF
static int ssb_gpio_extif_get_value(struct gpio_chip *chip, unsigned gpio)
static int ssb_gpio_extif_get_value(struct gpio_chip *chip, unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
return !!ssb_extif_gpio_in(&bus->extif, 1 << gpio);
}
static void ssb_gpio_extif_set_value(struct gpio_chip *chip, unsigned gpio,
static void ssb_gpio_extif_set_value(struct gpio_chip *chip, unsigned int gpio,
int value)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -272,7 +272,7 @@ static void ssb_gpio_extif_set_value(struct gpio_chip *chip, unsigned gpio,
}
static int ssb_gpio_extif_direction_input(struct gpio_chip *chip,
unsigned gpio)
unsigned int gpio)
{
struct ssb_bus *bus = gpiochip_get_data(chip);
@ -281,7 +281,7 @@ static int ssb_gpio_extif_direction_input(struct gpio_chip *chip,
}
static int ssb_gpio_extif_direction_output(struct gpio_chip *chip,
unsigned gpio, int value)
unsigned int gpio, int value)
{
struct ssb_bus *bus = gpiochip_get_data(chip);