From 1c83af5f9d7e15a091f11394ad5916a7dcf1a99e Mon Sep 17 00:00:00 2001 From: Greg Ungerer Date: Thu, 4 Nov 2010 13:53:26 +1000 Subject: m68knommu: use user stack pointer hardware on some ColdFire cores The more modern ColdFire parts (even if based on older version cores) have separate user and supervisor stack pointers (a7 register). Modify the ColdFire CPU setup and exception code to enable and use this on parts that have it. Signed-off-by: Greg Ungerer --- arch/m68k/include/asm/m54xxacr.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/m68k/include/asm/m54xxacr.h') diff --git a/arch/m68k/include/asm/m54xxacr.h b/arch/m68k/include/asm/m54xxacr.h index 76d64906aa62..12209c68b904 100644 --- a/arch/m68k/include/asm/m54xxacr.h +++ b/arch/m68k/include/asm/m54xxacr.h @@ -26,6 +26,7 @@ #define CACR_IHLCK 0x00000800 /* Intruction cache half lock */ #define CACR_IDCM 0x00000400 /* Intruction cache inhibit */ #define CACR_ICINVA 0x00000100 /* Invalidate instr cache */ +#define CACR_EUSP 0x00000020 /* Enable separate user a7 */ #define ACR_BASE_POS 24 /* Address Base */ #define ACR_MASK_POS 16 /* Address Mask */ @@ -67,7 +68,11 @@ /* Enable data store buffer */ /* outside ACRs : No cache, precise */ /* Enable instruction+branch caches */ +#if defined(CONFIG_M5407) #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC) +#else +#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP) +#endif #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT) -- cgit v1.2.3-55-g7522