diff options
| author | Gary King <gking@nvidia.com> | 2009-12-07 16:18:05 -0800 |
|---|---|---|
| committer | Gary King <gking@nvidia.com> | 2009-12-07 16:18:05 -0800 |
| commit | bb11d46b72a4a2b53f890faa970a380cf0084bf2 (patch) | |
| tree | 2d9d2955e069fed69febbe567a835fcc48ec6ec6 /arch/arm/mm/cache-l2x0.c | |
| parent | e1b5e49debba7174e7b9c48195de8abfd54911dd (diff) | |
| parent | 74ece4056571443eef30d4dff62180944b5a39d8 (diff) | |
Merge commit 'arm/2.6.28-arm' into android-tegra-2.6.29
Conflicts:
MAINTAINERS
arch/arm/Kconfig
arch/arm/Makefile
arch/arm/boot/compressed/head.S
arch/arm/common/Makefile
arch/arm/configs/realview-smp_defconfig
arch/arm/configs/realview_defconfig
arch/arm/configs/versatile_defconfig
arch/arm/include/asm/elf.h
arch/arm/include/asm/uaccess.h
arch/arm/kernel/module.c
arch/arm/kernel/signal.c
arch/arm/mach-realview/Kconfig
arch/arm/mach-realview/Makefile
arch/arm/mach-realview/core.c
arch/arm/mach-realview/core.h
arch/arm/mach-realview/include/mach/board-pba8.h
arch/arm/mach-realview/include/mach/debug-macro.S
arch/arm/mach-realview/include/mach/hardware.h
arch/arm/mach-realview/include/mach/irqs.h
arch/arm/mach-realview/include/mach/memory.h
arch/arm/mach-realview/include/mach/uncompress.h
arch/arm/mach-realview/localtimer.c
arch/arm/mach-realview/platsmp.c
arch/arm/mach-realview/realview_eb.c
arch/arm/mach-realview/realview_pb1176.c
arch/arm/mach-realview/realview_pb11mp.c
arch/arm/mach-realview/realview_pba8.c
arch/arm/mm/Kconfig
arch/arm/mm/copypage-v6.c
arch/arm/mm/dma-mapping.c
arch/arm/mm/proc-v7.S
arch/arm/oprofile/op_model_mpcore.c
arch/arm/tools/mach-types
arch/arm/vfp/vfpmodule.c
drivers/mtd/maps/integrator-flash.c
drivers/net/smsc911x.c
drivers/net/smsc911x.h
Diffstat (limited to 'arch/arm/mm/cache-l2x0.c')
| -rw-r--r-- | arch/arm/mm/cache-l2x0.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c index b480f1d3591f..b97081b9cefd 100644 --- a/arch/arm/mm/cache-l2x0.c +++ b/arch/arm/mm/cache-l2x0.c @@ -27,6 +27,7 @@ static void __iomem *l2x0_base; static DEFINE_SPINLOCK(l2x0_lock); +bool l2x0_disabled; static inline void sync_writel(unsigned long val, unsigned long reg, unsigned long complete_mask) @@ -34,7 +35,11 @@ static inline void sync_writel(unsigned long val, unsigned long reg, unsigned long flags; spin_lock_irqsave(&l2x0_lock, flags); +#ifdef CONFIG_ARM_ERRATA_484863 + asm volatile("swp %0, %0, [%1]\n" : "+r" (val) : "r" (l2x0_base + reg)); +#else writel(val, l2x0_base + reg); +#endif /* wait for the operation to complete */ while (readl(l2x0_base + reg) & complete_mask) ; @@ -97,20 +102,25 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) { __u32 aux; - l2x0_base = base; + if (l2x0_disabled) { + printk(KERN_INFO "L2X0 cache controller disabled\n"); + return; + } - /* disable L2X0 */ - writel(0, l2x0_base + L2X0_CTRL); + l2x0_base = base; - aux = readl(l2x0_base + L2X0_AUX_CTRL); - aux &= aux_mask; - aux |= aux_val; - writel(aux, l2x0_base + L2X0_AUX_CTRL); + if (!(readl(l2x0_base + L2X0_CTRL) & 1)) { + /* L2X0 cache controller disabled */ + aux = readl(l2x0_base + L2X0_AUX_CTRL); + aux &= aux_mask; + aux |= aux_val; + writel(aux, l2x0_base + L2X0_AUX_CTRL); - l2x0_inv_all(); + l2x0_inv_all(); - /* enable L2X0 */ - writel(1, l2x0_base + L2X0_CTRL); + /* enable L2X0 */ + writel(1, l2x0_base + L2X0_CTRL); + } outer_cache.inv_range = l2x0_inv_range; outer_cache.clean_range = l2x0_clean_range; @@ -118,3 +128,10 @@ void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask) printk(KERN_INFO "L2X0 cache controller enabled\n"); } + +static int __init l2x0_disable(char *unused) +{ + l2x0_disabled = 1; + return 0; +} +early_param("nol2x0", l2x0_disable); |