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[POWERPC] powermac: Suspend to disk on G5

Browse source 
Powermac G5 suspend to disk implementation.  The code is platform
agnostic but only tested on powermac, no other 64-bit powerpc
machines.

Because nvidiafb still breaks suspend I have marked it EXPERIMENTAL on
powermac and because I can't test it and some lowlevel code will need
changes it is BROKEN on all other 64-bit platforms.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Johannes Berg 2007-05-03 22:31:38 +10:00 committed by Paul Mackerras
parent 7e11580b36
commit 543b9fd352
9 changed files with 276 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
arch/powerpc/Kconfig
View file

@ -126,6 +126,11 @@ config DEFAULT_UIMAGE
Used to allow a board to specify it wants a uImage built by default
default n
config PPC64_SWSUSP
bool
depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
default y
menu "Processor support"
choice
prompt "Processor Type"

1
arch/powerpc/kernel/Makefile
View file

@ -38,6 +38,7 @@ obj-$(CONFIG_6xx) += idle_6xx.o l2cr_6xx.o cpu_setup_6xx.o
obj-$(CONFIG_TAU) += tau_6xx.o
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
obj32-$(CONFIG_SOFTWARE_SUSPEND) += swsusp_32.o
obj64-$(CONFIG_SOFTWARE_SUSPEND) += swsusp_64.o swsusp_asm64.o
obj32-$(CONFIG_MODULES) += module_32.o
ifeq ($(CONFIG_PPC_MERGE),y)

4
arch/powerpc/kernel/asm-offsets.c
View file

@ -21,12 +21,12 @@
#include <linux/types.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/suspend.h>
#ifdef CONFIG_PPC64
#include <linux/time.h>
#include <linux/hardirq.h>
#else
#include <linux/ptrace.h>
#include <linux/suspend.h>
#endif
#include <asm/io.h>
@ -257,11 +257,11 @@ int main(void)
DEFINE(CPU_SPEC_SETUP, offsetof(struct cpu_spec, cpu_setup));
DEFINE(CPU_SPEC_RESTORE, offsetof(struct cpu_spec, cpu_restore));
#ifndef CONFIG_PPC64
DEFINE(pbe_address, offsetof(struct pbe, address));
DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address));
DEFINE(pbe_next, offsetof(struct pbe, next));
#ifndef CONFIG_PPC64
DEFINE(TASK_SIZE, TASK_SIZE);
DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28);
#endif /* ! CONFIG_PPC64 */

5
arch/powerpc/kernel/idle.c
View file

@ -33,8 +33,11 @@
#include <asm/smp.h>
#ifdef CONFIG_HOTPLUG_CPU
/* this is used for software suspend, and that shuts down
* CPUs even while the system is still booting... */
#define cpu_should_die() (cpu_is_offline(smp_processor_id()) && \
system_state == SYSTEM_RUNNING)
(system_state == SYSTEM_RUNNING \
|| system_state == SYSTEM_BOOTING))
#else
#define cpu_should_die() 0
#endif

9
arch/powerpc/kernel/swsusp.c
View file

@ -24,6 +24,11 @@ void save_processor_state(void)
flush_fp_to_thread(current);
flush_altivec_to_thread(current);
flush_spe_to_thread(current);
#ifdef CONFIG_PPC64
hard_irq_disable();
#endif
}
void restore_processor_state(void)
@ -31,4 +36,8 @@ void restore_processor_state(void)
#ifdef CONFIG_PPC32
set_context(current->active_mm->context.id, current->active_mm->pgd);
#endif
#ifdef CONFIG_PPC64
hard_irq_enable();
#endif
}

24
arch/powerpc/kernel/swsusp_64.c Normal file
View file

@ -0,0 +1,24 @@
/*
* PowerPC 64-bit swsusp implementation
*
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* GPLv2
*/
#include <asm/system.h>
#include <asm/iommu.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
void do_after_copyback(void)
{
iommu_restore();
touch_softlockup_watchdog();
mb();
}
void _iommu_save(void)
{
iommu_save();
}

228
arch/powerpc/kernel/swsusp_asm64.S Normal file
View file

@ -0,0 +1,228 @@
/*
* PowerPC 64-bit swsusp implementation
*
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* GPLv2
*/
#include <linux/threads.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
/*
* Structure for storing CPU registers on the save area.
*/
#define SL_r1 0x00 /* stack pointer */
#define SL_PC 0x08
#define SL_MSR 0x10
#define SL_SDR1 0x18
#define SL_XER 0x20
#define SL_TB 0x40
#define SL_r2 0x48
#define SL_CR 0x50
#define SL_LR 0x58
#define SL_r12 0x60
#define SL_r13 0x68
#define SL_r14 0x70
#define SL_r15 0x78
#define SL_r16 0x80
#define SL_r17 0x88
#define SL_r18 0x90
#define SL_r19 0x98
#define SL_r20 0xa0
#define SL_r21 0xa8
#define SL_r22 0xb0
#define SL_r23 0xb8
#define SL_r24 0xc0
#define SL_r25 0xc8
#define SL_r26 0xd0
#define SL_r27 0xd8
#define SL_r28 0xe0
#define SL_r29 0xe8
#define SL_r30 0xf0
#define SL_r31 0xf8
#define SL_SIZE SL_r31+8
/* these macros rely on the save area being
* pointed to by r11 */
#define SAVE_SPECIAL(special) \
mf##special r0 ;\
std r0, SL_##special(r11)
#define RESTORE_SPECIAL(special) \
ld r0, SL_##special(r11) ;\
mt##special r0
#define SAVE_REGISTER(reg) \
std reg, SL_##reg(r11)
#define RESTORE_REGISTER(reg) \
ld reg, SL_##reg(r11)
/* space for storing cpu state */
.section .data
.align 5
swsusp_save_area:
.space SL_SIZE
.section ".toc","aw"
swsusp_save_area_ptr:
.tc swsusp_save_area[TC],swsusp_save_area
restore_pblist_ptr:
.tc restore_pblist[TC],restore_pblist
.section .text
.align 5
_GLOBAL(swsusp_arch_suspend)
ld r11,swsusp_save_area_ptr@toc(r2)
SAVE_SPECIAL(LR)
SAVE_REGISTER(r1)
SAVE_SPECIAL(CR)
SAVE_SPECIAL(TB)
SAVE_REGISTER(r2)
SAVE_REGISTER(r12)
SAVE_REGISTER(r13)
SAVE_REGISTER(r14)
SAVE_REGISTER(r15)
SAVE_REGISTER(r16)
SAVE_REGISTER(r17)
SAVE_REGISTER(r18)
SAVE_REGISTER(r19)
SAVE_REGISTER(r20)
SAVE_REGISTER(r21)
SAVE_REGISTER(r22)
SAVE_REGISTER(r23)
SAVE_REGISTER(r24)
SAVE_REGISTER(r25)
SAVE_REGISTER(r26)
SAVE_REGISTER(r27)
SAVE_REGISTER(r28)
SAVE_REGISTER(r29)
SAVE_REGISTER(r30)
SAVE_REGISTER(r31)
SAVE_SPECIAL(MSR)
SAVE_SPECIAL(SDR1)
SAVE_SPECIAL(XER)
/* we push the stack up 128 bytes but don't store the
* stack pointer on the stack like a real stackframe */
addi r1,r1,-128
bl _iommu_save
bl swsusp_save
/* restore LR */
ld r11,swsusp_save_area_ptr@toc(r2)
RESTORE_SPECIAL(LR)
addi r1,r1,128
blr
/* Resume code */
_GLOBAL(swsusp_arch_resume)
/* Stop pending alitvec streams and memory accesses */
BEGIN_FTR_SECTION
DSSALL
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
sync
ld r12,restore_pblist_ptr@toc(r2)
ld r12,0(r12)
cmpdi r12,0
beq- nothing_to_copy
li r15,512
copyloop:
ld r13,pbe_address(r12)
ld r14,pbe_orig_address(r12)
mtctr r15
li r10,0
copy_page_loop:
ldx r0,r10,r13
stdx r0,r10,r14
addi r10,r10,8
bdnz copy_page_loop
ld r12,pbe_next(r12)
cmpdi r12,0
bne+ copyloop
nothing_to_copy:
/* flush caches */
lis r3, 0x10
mtctr r3
li r3, 0
ori r3, r3, CONFIG_KERNEL_START>>48
li r0, 48
sld r3, r3, r0
li r0, 0
1:
dcbf r0,r3
addi r3,r3,0x20
bdnz 1b
sync
tlbia
ld r11,swsusp_save_area_ptr@toc(r2)
RESTORE_SPECIAL(CR)
/* restore timebase */
/* load saved tb */
ld r1, SL_TB(r11)
/* get upper 32 bits of it */
srdi r2, r1, 32
/* clear tb lower to avoid wrap */
li r0, 0
mttbl r0
/* set tb upper */
mttbu r2
/* set tb lower */
mttbl r1
/* restore registers */
RESTORE_REGISTER(r1)
RESTORE_REGISTER(r2)
RESTORE_REGISTER(r12)
RESTORE_REGISTER(r13)
RESTORE_REGISTER(r14)
RESTORE_REGISTER(r15)
RESTORE_REGISTER(r16)
RESTORE_REGISTER(r17)
RESTORE_REGISTER(r18)
RESTORE_REGISTER(r19)
RESTORE_REGISTER(r20)
RESTORE_REGISTER(r21)
RESTORE_REGISTER(r22)
RESTORE_REGISTER(r23)
RESTORE_REGISTER(r24)
RESTORE_REGISTER(r25)
RESTORE_REGISTER(r26)
RESTORE_REGISTER(r27)
RESTORE_REGISTER(r28)
RESTORE_REGISTER(r29)
RESTORE_REGISTER(r30)
RESTORE_REGISTER(r31)
/* can't use RESTORE_SPECIAL(MSR) */
ld r0, SL_MSR(r11)
mtmsrd r0, 0
RESTORE_SPECIAL(SDR1)
RESTORE_SPECIAL(XER)
sync
addi r1,r1,-128
bl slb_flush_and_rebolt
bl do_after_copyback
addi r1,r1,128
ld r11,swsusp_save_area_ptr@toc(r2)
RESTORE_SPECIAL(LR)
li r3, 0
blr

2
include/linux/suspend.h
View file

@ -1,7 +1,7 @@
#ifndef _LINUX_SWSUSP_H
#define _LINUX_SWSUSP_H
#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32)
#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
#include <asm/suspend.h>
#endif
#include <linux/swap.h>

4
kernel/power/Kconfig
View file

@ -79,7 +79,7 @@ config PM_SYSFS_DEPRECATED
config SOFTWARE_SUSPEND
bool "Software Suspend"
depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
depends on PM && SWAP && (((X86 || PPC64_SWSUSP) && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP))
---help---
Enable the suspend to disk (STD) functionality.
@ -134,7 +134,7 @@ config PM_STD_PARTITION
config SUSPEND_SMP
bool
depends on HOTPLUG_CPU && X86 && PM
depends on HOTPLUG_CPU && (X86 || PPC64) && PM
default y
config APM_EMULATION