> -----Original Message----- > From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- > owner@xxxxxxxxxxxxxxx] On Behalf Of Shilimkar, Santosh > Sent: Tuesday, October 05, 2010 10:25 AM > To: Russell King - ARM Linux > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; catalin.marinas@xxxxxxx; > tglx@xxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx > Subject: RE: [PATCH 6/6] ARM: l2x0: Optimise the range based operations > [....] > > mmcblk0: error -5 transferring data, sector 1, nr 7, card status 0x900 > > end_request: I/O error, dev mmcblk0, sector 1 > > Buffer I/O error on device mmcblk0, logical block 0 > > port 1 high speed > > > > -5 is -EIO, which is a FIFO overrun error, so somehow these changes are > > causing the CPU or bus accesses to be slower. > I don't see the problem on OMAP MMC. > May be some how additional check is making these operations > touch slower which lead to the under run. > > Will have a look at it again. May for this merge window you can > drop 'Optimise the range based operations' and 'Determine cache size' > patches. > The Pl310 cache way size given in KB and 'Determine cache size' missed to include that. Have updated the git tree with refreshed patch. Here is the updated patch.. ---------------------- >From 8b351fbc4da738a0727854cb88933c4051657384 Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Date: Sun, 11 Jul 2010 14:35:37 +0530 Subject: [PATCH 6/8 v2] 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@xxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx> --- arch/arm/include/asm/hardware/cache-l2x0.h | 1 + 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 d833355..4633d2a 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 9310d61..262c752 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); } -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
