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Merge branch 'l2x0-pull-rmk' of git://dev.omapzoom.org/pub/scm/santosh/kernel-omap4-base into devel-stable

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This commit is contained in:
Russell King 2010-10-28 14:42:06 +01:00
commit be6786ac73
7 changed files with 171 additions and 9 deletions
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9
arch/arm/include/asm/hardware/cache-l2x0.h
View file

@ -21,9 +21,6 @@
#define __ASM_ARM_HARDWARE_L2X0_H
#define L2X0_CACHE_ID 0x000
#define L2X0_CACHE_ID_PART_MASK (0xf << 6)
#define L2X0_CACHE_ID_PART_L210 (1 << 6)
#define L2X0_CACHE_ID_PART_L310 (3 << 6)
#define L2X0_CACHE_TYPE 0x004
#define L2X0_CTRL 0x100
#define L2X0_AUX_CTRL 0x104
@ -58,6 +55,12 @@
#define L2X0_DYNAMIC_CLK_GATING_EN (1 << 1)
#define L2X0_STNDBY_MODE_EN (1 << 0)
/* Registers shifts and masks */
#define L2X0_CACHE_ID_PART_MASK (0xf << 6)
#define L2X0_CACHE_ID_PART_L210 (1 << 6)
#define L2X0_CACHE_ID_PART_L310 (3 << 6)
#define L2X0_AUX_CTRL_WAY_SIZE_MASK (0x3 << 17)
#ifndef __ASSEMBLY__
extern void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask);
#endif

24
arch/arm/include/asm/outercache.h
View file

@ -25,6 +25,9 @@ struct outer_cache_fns {
void (*inv_range)(unsigned long, unsigned long);
void (*clean_range)(unsigned long, unsigned long);
void (*flush_range)(unsigned long, unsigned long);
void (*flush_all)(void);
void (*inv_all)(void);
void (*disable)(void);
#ifdef CONFIG_OUTER_CACHE_SYNC
void (*sync)(void);
#endif
@ -50,6 +53,24 @@ static inline void outer_flush_range(unsigned long start, unsigned long end)
outer_cache.flush_range(start, end);
}
static inline void outer_flush_all(void)
{
if (outer_cache.flush_all)
outer_cache.flush_all();
}
static inline void outer_inv_all(void)
{
if (outer_cache.inv_all)
outer_cache.inv_all();
}
static inline void outer_disable(void)
{
if (outer_cache.disable)
outer_cache.disable();
}
#else
static inline void outer_inv_range(unsigned long start, unsigned long end)
@ -58,6 +79,9 @@ static inline void outer_clean_range(unsigned long start, unsigned long end)
{ }
static inline void outer_flush_range(unsigned long start, unsigned long end)
{ }
static inline void outer_flush_all(void) { }
static inline void outer_inv_all(void) { }
static inline void outer_disable(void) { }
#endif

3
arch/arm/kernel/machine_kexec.c
View file

@ -78,7 +78,10 @@ void machine_kexec(struct kimage *image)
local_fiq_disable();
setup_mm_for_reboot(0); /* mode is not used, so just pass 0*/
flush_cache_all();
outer_flush_all();
outer_disable();
cpu_proc_fin();
outer_inv_all();
flush_cache_all();
cpu_reset(reboot_code_buffer_phys);
}

13
arch/arm/mach-omap2/omap4-common.c
View file

@ -44,6 +44,13 @@ void __init gic_init_irq(void)
}
#ifdef CONFIG_CACHE_L2X0
static void omap4_l2x0_disable(void)
{
/* Disable PL310 L2 Cache controller */
omap_smc1(0x102, 0x0);
}
static int __init omap_l2_cache_init(void)
{
/*
@ -70,6 +77,12 @@ static int __init omap_l2_cache_init(void)
else
l2x0_init(l2cache_base, 0x0e070000, 0xc0000fff);
/*
* Override default outer_cache.disable with a OMAP4
* specific one
*/
outer_cache.disable = omap4_l2x0_disable;
return 0;
}
early_initcall(omap_l2_cache_init);

45
arch/arm/mach-ux500/cpu.c
View file

@ -10,6 +10,7 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/hardware/gic.h>
#include <asm/mach/map.h>
@ -71,6 +72,46 @@ void __init ux500_init_irq(void)
}
#ifdef CONFIG_CACHE_L2X0
static inline void ux500_cache_wait(void __iomem *reg, unsigned long mask)
{
/* wait for the operation to complete */
while (readl(reg) & mask)
;
}
static inline void ux500_cache_sync(void)
{
void __iomem *base = __io_address(UX500_L2CC_BASE);
writel(0, base + L2X0_CACHE_SYNC);
ux500_cache_wait(base + L2X0_CACHE_SYNC, 1);
}
/*
* The L2 cache cannot be turned off in the non-secure world.
* Dummy until a secure service is in place.
*/
static void ux500_l2x0_disable(void)
{
}
/*
* This is only called when doing a kexec, just after turning off the L2
* and L1 cache, and it is surrounded by a spinlock in the generic version.
* However, we're not really turning off the L2 cache right now and the
* PL310 does not support exclusive accesses (used to implement the spinlock).
* So, the invalidation needs to be done without the spinlock.
*/
static void ux500_l2x0_inv_all(void)
{
void __iomem *l2x0_base = __io_address(UX500_L2CC_BASE);
uint32_t l2x0_way_mask = (1<<16) - 1; /* Bitmask of active ways */
/* invalidate all ways */
writel(l2x0_way_mask, l2x0_base + L2X0_INV_WAY);
ux500_cache_wait(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
ux500_cache_sync();
}
static int ux500_l2x0_init(void)
{
void __iomem *l2x0_base;
@ -80,6 +121,10 @@ static int ux500_l2x0_init(void)
/* 64KB way size, 8 way associativity, force WA */
l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);
/* Override invalidate function */
outer_cache.disable = ux500_l2x0_disable;
outer_cache.inv_all = ux500_l2x0_inv_all;
return 0;
}
early_initcall(ux500_l2x0_init);

8
arch/arm/mm/Kconfig
View file

@ -779,6 +779,14 @@ config CACHE_L2X0
help
This option enables the L2x0 PrimeCell.
config CACHE_PL310
bool
depends on CACHE_L2X0
default y if CPU_V7 && !CPU_V6
help
This option enables optimisations for the PL310 cache
controller.
config CACHE_TAUROS2
bool "Enable the Tauros2 L2 cache controller"
depends on (ARCH_DOVE || ARCH_MMP)

78
arch/arm/mm/cache-l2x0.c
View file

@ -28,14 +28,24 @@
static void __iomem *l2x0_base;
static DEFINE_SPINLOCK(l2x0_lock);
static uint32_t l2x0_way_mask; /* Bitmask of active ways */
static uint32_t l2x0_size;
static inline void cache_wait(void __iomem *reg, unsigned long mask)
static inline void cache_wait_way(void __iomem *reg, unsigned long mask)
{
/* wait for the operation to complete */
/* wait for cache operation by line or way to complete */
while (readl_relaxed(reg) & mask)
;
}
#ifdef CONFIG_CACHE_PL310
static inline void cache_wait(void __iomem *reg, unsigned long mask)
{
/* cache operations by line are atomic on PL310 */
}
#else
#define cache_wait cache_wait_way
#endif
static inline void cache_sync(void)
{
void __iomem *base = l2x0_base;
@ -103,14 +113,40 @@ static void l2x0_cache_sync(void)
spin_unlock_irqrestore(&l2x0_lock, flags);
}
static inline void l2x0_inv_all(void)
static void l2x0_flush_all(void)
{
unsigned long flags;
/* clean all ways */
spin_lock_irqsave(&l2x0_lock, flags);
writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_INV_WAY);
cache_wait_way(l2x0_base + L2X0_CLEAN_INV_WAY, l2x0_way_mask);
cache_sync();
spin_unlock_irqrestore(&l2x0_lock, flags);
}
static void l2x0_clean_all(void)
{
unsigned long flags;
/* clean all ways */
spin_lock_irqsave(&l2x0_lock, flags);
writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_CLEAN_WAY);
cache_wait_way(l2x0_base + L2X0_CLEAN_WAY, l2x0_way_mask);
cache_sync();
spin_unlock_irqrestore(&l2x0_lock, flags);
}
static void l2x0_inv_all(void)
{
unsigned long flags;
/* invalidate all ways */
spin_lock_irqsave(&l2x0_lock, flags);
/* Invalidating when L2 is enabled is a nono */
BUG_ON(readl(l2x0_base + L2X0_CTRL) & 1);
writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY);
cache_wait(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
cache_wait_way(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
cache_sync();
spin_unlock_irqrestore(&l2x0_lock, flags);
}
@ -159,6 +195,11 @@ static void l2x0_clean_range(unsigned long start, unsigned long end)
void __iomem *base = l2x0_base;
unsigned long flags;
if ((end - start) >= l2x0_size) {
l2x0_clean_all();
return;
}
spin_lock_irqsave(&l2x0_lock, flags);
start &= ~(CACHE_LINE_SIZE - 1);
while (start < end) {
@ -184,6 +225,11 @@ static void l2x0_flush_range(unsigned long start, unsigned long end)
void __iomem *base = l2x0_base;
unsigned long flags;
if ((end - start) >= l2x0_size) {
l2x0_flush_all();
return;
}
spin_lock_irqsave(&l2x0_lock, flags);
start &= ~(CACHE_LINE_SIZE - 1);
while (start < end) {
@ -206,10 +252,20 @@ static void l2x0_flush_range(unsigned long start, unsigned long end)
spin_unlock_irqrestore(&l2x0_lock, flags);
}
static void l2x0_disable(void)
{
unsigned long flags;
spin_lock_irqsave(&l2x0_lock, flags);
writel(0, l2x0_base + L2X0_CTRL);
spin_unlock_irqrestore(&l2x0_lock, flags);
}
void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
{
__u32 aux;
__u32 cache_id;
__u32 way_size = 0;
int ways;
const char *type;
@ -243,6 +299,13 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
l2x0_way_mask = (1 << ways) - 1;
/*
* L2 cache Size = Way size * Number of ways
*/
way_size = (aux & L2X0_AUX_CTRL_WAY_SIZE_MASK) >> 17;
way_size = 1 << (way_size + 3);
l2x0_size = ways * way_size * SZ_1K;
/*
* Check if l2x0 controller is already enabled.
* If you are booting from non-secure mode
@ -263,8 +326,11 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask)
outer_cache.clean_range = l2x0_clean_range;
outer_cache.flush_range = l2x0_flush_range;
outer_cache.sync = l2x0_cache_sync;
outer_cache.flush_all = l2x0_flush_all;
outer_cache.inv_all = l2x0_inv_all;
outer_cache.disable = l2x0_disable;
printk(KERN_INFO "%s cache controller enabled\n", type);
printk(KERN_INFO "l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x\n",
ways, cache_id, aux);
printk(KERN_INFO "l2x0: %d ways, CACHE_ID 0x%08x, AUX_CTRL 0x%08x, Cache size: %d B\n",
ways, cache_id, aux, l2x0_size);
}