diff --git a/arch/arc/include/asm/cacheflush.h b/arch/arc/include/asm/cacheflush.h index a093adbdb017580f6da74abb551ea02e14e04da5..fc662f49c55ac91916af7cbd830b1c978f827ffe 100644 --- a/arch/arc/include/asm/cacheflush.h +++ b/arch/arc/include/asm/cacheflush.h @@ -85,6 +85,10 @@ void flush_anon_page(struct vm_area_struct *vma, */ #define PG_dc_clean PG_arch_1 +#define CACHE_COLORS_NUM 4 +#define CACHE_COLORS_MSK (CACHE_COLORS_NUM - 1) +#define CACHE_COLOR(addr) (((unsigned long)(addr) >> (PAGE_SHIFT)) & CACHE_COLORS_MSK) + /* * Simple wrapper over config option * Bootup code ensures that hardware matches kernel configuration @@ -94,8 +98,6 @@ static inline int cache_is_vipt_aliasing(void) return IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING); } -#define CACHE_COLOR(addr) (((unsigned long)(addr) >> (PAGE_SHIFT)) & 1) - /* * checks if two addresses (after page aligning) index into same cache set */ diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c index a0ce8ff1e59cffe87867510fffd8361a2aa7915c..ec86ac0e33213b889cd6100e10e95fda8f3c31e4 100644 --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -972,11 +972,16 @@ void arc_cache_init(void) /* check for D-Cache aliasing on ARCompact: ARCv2 has PIPT */ if (is_isa_arcompact()) { int handled = IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING); - - if (dc->alias && !handled) - panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n"); - else if (!dc->alias && handled) + int num_colors = dc->sz_k/dc->assoc/TO_KB(PAGE_SIZE); + + if (dc->alias) { + if (!handled) + panic("Enable CONFIG_ARC_CACHE_VIPT_ALIASING\n"); + if (CACHE_COLORS_NUM != num_colors) + panic("CACHE_COLORS_NUM not optimized for config\n"); + } else if (!dc->alias && handled) { panic("Disable CONFIG_ARC_CACHE_VIPT_ALIASING\n"); + } } }