2 * Bit definitions for the MCF54xx ACR and CACR registers.
9 * Define the Cache register flags.
11 #define CACR_DEC 0x80000000 /* Enable data cache */
12 #define CACR_DWP 0x40000000 /* Data write protection */
13 #define CACR_DESB 0x20000000 /* Enable data store buffer */
14 #define CACR_DDPI 0x10000000 /* Disable invalidation by CPUSHL */
15 #define CACR_DHCLK 0x08000000 /* Half data cache lock mode */
16 #define CACR_DDCM_WT 0x00000000 /* Write through cache*/
17 #define CACR_DDCM_CP 0x02000000 /* Copyback cache */
18 #define CACR_DDCM_P 0x04000000 /* No cache, precise */
19 #define CACR_DDCM_IMP 0x06000000 /* No cache, imprecise */
20 #define CACR_DCINVA 0x01000000 /* Invalidate data cache */
21 #define CACR_BEC 0x00080000 /* Enable branch cache */
22 #define CACR_BCINVA 0x00040000 /* Invalidate branch cache */
23 #define CACR_IEC 0x00008000 /* Enable instruction cache */
24 #define CACR_DNFB 0x00002000 /* Inhibited fill buffer */
25 #define CACR_IDPI 0x00001000 /* Disable CPUSHL */
26 #define CACR_IHLCK 0x00000800 /* Intruction cache half lock */
27 #define CACR_IDCM 0x00000400 /* Intruction cache inhibit */
28 #define CACR_ICINVA 0x00000100 /* Invalidate instr cache */
30 #define ACR_BASE_POS 24 /* Address Base */
31 #define ACR_MASK_POS 16 /* Address Mask */
32 #define ACR_ENABLE 0x00008000 /* Enable address */
33 #define ACR_USER 0x00000000 /* User mode access only */
34 #define ACR_SUPER 0x00002000 /* Supervisor mode only */
35 #define ACR_ANY 0x00004000 /* Match any access mode */
36 #define ACR_CM_WT 0x00000000 /* Write through mode */
37 #define ACR_CM_CP 0x00000020 /* Copyback mode */
38 #define ACR_CM_OFF_PRE 0x00000040 /* No cache, precise */
39 #define ACR_CM_OFF_IMP 0x00000060 /* No cache, imprecise */
40 #define ACR_CM 0x00000060 /* Cache mode mask */
41 #define ACR_WPROTECT 0x00000004 /* Write protect */
43 #if defined(CONFIG_M5407)
45 #define ICACHE_SIZE 0x4000 /* instruction - 16k */
46 #define DCACHE_SIZE 0x2000 /* data - 8k */
48 #elif defined(CONFIG_M54xx)
50 #define ICACHE_SIZE 0x8000 /* instruction - 32k */
51 #define DCACHE_SIZE 0x8000 /* data - 32k */
55 #define CACHE_LINE_SIZE 0x0010 /* 16 bytes */
56 #define CACHE_WAYS 4 /* 4 ways */
59 * Version 4 cores have a true harvard style separate instruction
60 * and data cache. Enable data and instruction caches, also enable write
61 * buffers and branch accelerator.
63 /* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
64 /* use '+' instead of '|' for assembler's sake */
66 /* Enable data cache */
67 /* Enable data store buffer */
68 /* outside ACRs : No cache, precise */
69 /* Enable instruction+branch caches */
70 #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
72 #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
74 #define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)
78 #if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_WT)
79 #define flush_dcache_range(a, l) do { asm("nop"); } while (0)
82 static inline void __m54xx_flush_cache_all(void)
84 __asm__ __volatile__ (
85 #if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
87 * Use cpushl to push and invalidate all cache lines.
88 * Gas doesn't seem to know how to generate the ColdFire
89 * cpushl instruction... Oh well, bit stuff it for now.
104 "movec %%d0,%%CACR\n\t"
105 "nop\n\t" /* forces flush of Store Buffer */
107 : "i" (CACHE_LINE_SIZE),
108 "i" (DCACHE_SIZE / CACHE_WAYS),
110 "i" (CACHE_MODE|CACR_DCINVA|CACR_BCINVA|CACR_ICINVA)
114 #define __flush_cache_all() __m54xx_flush_cache_all()
116 #endif /* __ASSEMBLY__ */
118 #endif /* m54xxacr_h */