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| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2010-07-11 14:35:37 +0530 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2010-10-26 11:40:03 +0530 |
| commit | 5ba70372289a1fb378b95cee2cf46b0203d65291 (patch) | |
| tree | 9f5fed0e160ff3476af12e51689cd6eeb9ae48a7 | |
| parent | 7db27e864abe0110cec5087b77de777455581e8f (diff) | |
| download | linux-5ba70372289a1fb378b95cee2cf46b0203d65291.tar.gz linux-5ba70372289a1fb378b95cee2cf46b0203d65291.tar.bz2 linux-5ba70372289a1fb378b95cee2cf46b0203d65291.zip | |
ARM: l2x0: Determine the cache size
The cache size is needed for to optimise range based
maintainance operations
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
| -rw-r--r-- | arch/arm/include/asm/hardware/cache-l2x0.h | 1 | ||||
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 13 |
2 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm/include/asm/hardware/cache-l2x0.h b/arch/arm/include/asm/hardware/cache-l2x0.h index d833355569cb..4633d2a8817a 100644 --- a/arch/arm/include/asm/hardware/cache-l2x0.h +++ b/arch/arm/include/asm/hardware/cache-l2x0.h @@ -55,6 +55,7 @@ #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); diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index 9310d618070b..262c7529bcdb 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -28,6 +28,7 @@ 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_way(void __iomem *reg, unsigned long mask) { @@ -242,6 +243,7 @@ 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; @@ -276,6 +278,13 @@ 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 * accessing the below registers will fault. @@ -300,6 +309,6 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) 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); } |