diff options
Diffstat (limited to 'arch/arm/mm')
| -rw-r--r-- | arch/arm/mm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/mm/cache-feroceon-l2.c | 45 | ||||
| -rw-r--r-- | arch/arm/mm/cache-tauros2.c | 29 |
3 files changed, 46 insertions, 30 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 241622e2fea3..f5ad9ee70426 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -854,7 +854,7 @@ config OUTER_CACHE_SYNC config CACHE_FEROCEON_L2 bool "Enable the Feroceon L2 cache controller" - depends on ARCH_KIRKWOOD || ARCH_MV78XX0 + depends on ARCH_KIRKWOOD || ARCH_MV78XX0 || ARCH_MVEBU default y select OUTER_CACHE help diff --git a/arch/arm/mm/cache-feroceon-l2.c b/arch/arm/mm/cache-feroceon-l2.c index aae891820f8f..dc814a548056 100644 --- a/arch/arm/mm/cache-feroceon-l2.c +++ b/arch/arm/mm/cache-feroceon-l2.c @@ -13,10 +13,15 @@ */ #include <linux/init.h> +#include <linux/of.h> +#include <linux/of_address.h> #include <linux/highmem.h> +#include <linux/io.h> #include <asm/cacheflush.h> #include <asm/cp15.h> -#include <plat/cache-feroceon-l2.h> +#include <asm/hardware/cache-feroceon-l2.h> + +#define L2_WRITETHROUGH_KIRKWOOD BIT(4) /* * Low-level cache maintenance operations. @@ -352,3 +357,41 @@ void __init feroceon_l2_init(int __l2_wt_override) printk(KERN_INFO "Feroceon L2: Cache support initialised%s.\n", l2_wt_override ? ", in WT override mode" : ""); } +#ifdef CONFIG_OF +static const struct of_device_id feroceon_ids[] __initconst = { + { .compatible = "marvell,kirkwood-cache"}, + { .compatible = "marvell,feroceon-cache"}, + {} +}; + +int __init feroceon_of_init(void) +{ + struct device_node *node; + void __iomem *base; + bool l2_wt_override = false; + struct resource res; + +#if defined(CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH) + l2_wt_override = true; +#endif + + node = of_find_matching_node(NULL, feroceon_ids); + if (node && of_device_is_compatible(node, "marvell,kirkwood-cache")) { + if (of_address_to_resource(node, 0, &res)) + return -ENODEV; + + base = ioremap(res.start, resource_size(&res)); + if (!base) + return -ENOMEM; + + if (l2_wt_override) + writel(readl(base) | L2_WRITETHROUGH_KIRKWOOD, base); + else + writel(readl(base) & ~L2_WRITETHROUGH_KIRKWOOD, base); + } + + feroceon_l2_init(l2_wt_override); + + return 0; +} +#endif diff --git a/arch/arm/mm/cache-tauros2.c b/arch/arm/mm/cache-tauros2.c index 1be0f4e5e6eb..b273739e6359 100644 --- a/arch/arm/mm/cache-tauros2.c +++ b/arch/arm/mm/cache-tauros2.c @@ -33,7 +33,7 @@ * outer cache operations into the kernel image if the kernel has been * configured to support a pre-v7 CPU. */ -#if __LINUX_ARM_ARCH__ < 7 +#ifdef CONFIG_CPU_32v5 /* * Low-level cache maintenance operations. */ @@ -229,33 +229,6 @@ static void __init tauros2_internal_init(unsigned int features) } #endif -#ifdef CONFIG_CPU_32v6 - /* - * Check whether this CPU lacks support for the v7 hierarchical - * cache ops. (PJ4 is in its v6 personality mode if the MMFR3 - * register indicates no support for the v7 hierarchical cache - * ops.) - */ - if (cpuid_scheme() && (read_mmfr3() & 0xf) == 0) { - /* - * When Tauros2 is used in an ARMv6 system, the L2 - * enable bit is in the ARMv6 ARM-mandated position - * (bit [26] of the System Control Register). - */ - if (!(get_cr() & 0x04000000)) { - printk(KERN_INFO "Tauros2: Enabling L2 cache.\n"); - adjust_cr(0x04000000, 0x04000000); - } - - mode = "ARMv6"; - outer_cache.inv_range = tauros2_inv_range; - outer_cache.clean_range = tauros2_clean_range; - outer_cache.flush_range = tauros2_flush_range; - outer_cache.disable = tauros2_disable; - outer_cache.resume = tauros2_resume; - } -#endif - #ifdef CONFIG_CPU_32v7 /* * Check whether this CPU has support for the v7 hierarchical |