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Diffstat (limited to 'kernel/arch/m68k/include/asm/m52xxacr.h')
| -rw-r--r-- | kernel/arch/m68k/include/asm/m52xxacr.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/kernel/arch/m68k/include/asm/m52xxacr.h b/kernel/arch/m68k/include/asm/m52xxacr.h new file mode 100644 index 000000000..abc391a9a --- /dev/null +++ b/kernel/arch/m68k/include/asm/m52xxacr.h @@ -0,0 +1,94 @@ +/****************************************************************************/ + +/* + * m52xxacr.h -- ColdFire version 2 core cache support + * + * (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com> + */ + +/****************************************************************************/ +#ifndef m52xxacr_h +#define m52xxacr_h +/****************************************************************************/ + +/* + * All varients of the ColdFire using version 2 cores have a similar + * cache setup. Although not absolutely identical the cache register + * definitions are compatible for all of them. Mostly they support a + * configurable cache memory that can be instruction only, data only, + * or split instruction and data. The exception is the very old version 2 + * core based parts, like the 5206(e), 5249 and 5272, which are instruction + * cache only. Cache size varies from 2k up to 16k. + */ + +/* + * Define the Cache Control register flags. + */ +#define CACR_CENB 0x80000000 /* Enable cache */ +#define CACR_CDPI 0x10000000 /* Disable invalidation by CPUSHL */ +#define CACR_CFRZ 0x08000000 /* Cache freeze mode */ +#define CACR_CINV 0x01000000 /* Invalidate cache */ +#define CACR_DISI 0x00800000 /* Disable instruction cache */ +#define CACR_DISD 0x00400000 /* Disable data cache */ +#define CACR_INVI 0x00200000 /* Invalidate instruction cache */ +#define CACR_INVD 0x00100000 /* Invalidate data cache */ +#define CACR_CEIB 0x00000400 /* Non-cachable instruction burst */ +#define CACR_DCM 0x00000200 /* Default cache mode */ +#define CACR_DBWE 0x00000100 /* Buffered write enable */ +#define CACR_DWP 0x00000020 /* Write protection */ +#define CACR_EUSP 0x00000010 /* Enable separate user a7 */ + +/* + * Define the Access Control register flags. + */ +#define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */ +#define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */ +#define ACR_ENABLE 0x00008000 /* Enable this ACR */ +#define ACR_USER 0x00000000 /* Allow only user accesses */ +#define ACR_SUPER 0x00002000 /* Allow supervisor access only */ +#define ACR_ANY 0x00004000 /* Allow any access type */ +#define ACR_CENB 0x00000000 /* Caching of region enabled */ +#define ACR_CDIS 0x00000040 /* Caching of region disabled */ +#define ACR_BWE 0x00000020 /* Write buffer enabled */ +#define ACR_WPROTECT 0x00000004 /* Write protect region */ + +/* + * Set the cache controller settings we will use. On the cores that support + * a split cache configuration we allow all the combinations at Kconfig + * time. For those cores that only have an instruction cache we just set + * that as on. + */ +#if defined(CONFIG_CACHE_I) +#define CACHE_TYPE (CACR_DISD + CACR_EUSP) +#define CACHE_INVTYPEI 0 +#elif defined(CONFIG_CACHE_D) +#define CACHE_TYPE (CACR_DISI + CACR_EUSP) +#define CACHE_INVTYPED 0 +#elif defined(CONFIG_CACHE_BOTH) +#define CACHE_TYPE CACR_EUSP +#define CACHE_INVTYPEI CACR_INVI +#define CACHE_INVTYPED CACR_INVD +#else +/* This is the instruction cache only devices (no split cache, no eusp) */ +#define CACHE_TYPE 0 +#define CACHE_INVTYPEI 0 +#endif + +#define CACHE_INIT (CACR_CINV + CACHE_TYPE) +#define CACHE_MODE (CACR_CENB + CACHE_TYPE + CACR_DCM) + +#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINV) +#if defined(CACHE_INVTYPEI) +#define CACHE_INVALIDATEI (CACHE_MODE + CACR_CINV + CACHE_INVTYPEI) +#endif +#if defined(CACHE_INVTYPED) +#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINV + CACHE_INVTYPED) +#endif + +#define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \ + (0x000f0000) + \ + (ACR_ENABLE + ACR_ANY + ACR_CENB + ACR_BWE)) +#define ACR1_MODE 0 + +/****************************************************************************/ +#endif /* m52xxsim_h */ |