xref: /linux/arch/m68k/include/asm/m54xxacr.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Bit definitions for the MCF54xx ACR and CACR registers.
4  */
5 
6 #ifndef	m54xxacr_h
7 #define m54xxacr_h
8 
9 /*
10  *	Define the Cache register flags.
11  */
12 #define CACR_DEC	0x80000000	/* Enable data cache */
13 #define CACR_DWP	0x40000000	/* Data write protection */
14 #define CACR_DESB	0x20000000	/* Enable data store buffer */
15 #define CACR_DDPI	0x10000000	/* Disable invalidation by CPUSHL */
16 #define CACR_DHCLK	0x08000000	/* Half data cache lock mode */
17 #define CACR_DDCM_WT	0x00000000	/* Write through cache*/
18 #define CACR_DDCM_CP	0x02000000	/* Copyback cache */
19 #define CACR_DDCM_P	0x04000000	/* No cache, precise */
20 #define CACR_DDCM_IMP	0x06000000	/* No cache, imprecise */
21 #define CACR_DCINVA	0x01000000	/* Invalidate data cache */
22 #define CACR_BEC	0x00080000	/* Enable branch cache */
23 #define CACR_BCINVA	0x00040000	/* Invalidate branch cache */
24 #define CACR_IEC	0x00008000	/* Enable instruction cache */
25 #define CACR_DNFB	0x00002000	/* Inhibited fill buffer */
26 #define CACR_IDPI	0x00001000	/* Disable CPUSHL */
27 #define CACR_IHLCK	0x00000800	/* Instruction cache half lock */
28 #define CACR_IDCM	0x00000400	/* Instruction cache inhibit */
29 #define CACR_ICINVA	0x00000100	/* Invalidate instr cache */
30 #define CACR_EUSP	0x00000020	/* Enable separate user a7 */
31 
32 #define ACR_BASE_POS	24		/* Address Base */
33 #define ACR_MASK_POS	16		/* Address Mask */
34 #define ACR_ENABLE	0x00008000	/* Enable address */
35 #define ACR_USER	0x00000000	/* User mode access only */
36 #define ACR_SUPER	0x00002000	/* Supervisor mode only */
37 #define ACR_ANY		0x00004000	/* Match any access mode */
38 #define ACR_CM_WT	0x00000000	/* Write through mode */
39 #define ACR_CM_CP	0x00000020	/* Copyback mode */
40 #define ACR_CM_OFF_PRE	0x00000040	/* No cache, precise */
41 #define ACR_CM_OFF_IMP	0x00000060	/* No cache, imprecise */
42 #define ACR_CM		0x00000060	/* Cache mode mask */
43 #define ACR_SP		0x00000008	/* Supervisor protect */
44 #define ACR_WPROTECT	0x00000004	/* Write protect */
45 
46 #define ACR_BA(x)	((x) & 0xff000000)
47 #define ACR_ADMSK(x)	((((x) - 1) & 0xff000000) >> 8)
48 
49 #if defined(CONFIG_M5407)
50 
51 #define ICACHE_SIZE 0x4000	/* instruction - 16k */
52 #define DCACHE_SIZE 0x2000	/* data - 8k */
53 
54 #elif defined(CONFIG_M54xx)
55 
56 #define ICACHE_SIZE 0x8000	/* instruction - 32k */
57 #define DCACHE_SIZE 0x8000	/* data - 32k */
58 
59 #elif defined(CONFIG_M5441x)
60 
61 #define ICACHE_SIZE 0x2000	/* instruction - 8k */
62 #define DCACHE_SIZE 0x2000	/* data - 8k */
63 #endif
64 
65 #define CACHE_LINE_SIZE 0x0010	/* 16 bytes */
66 #define CACHE_WAYS 4		/* 4 ways */
67 
68 #define ICACHE_SET_MASK	((ICACHE_SIZE / 64 - 1) << CACHE_WAYS)
69 #define DCACHE_SET_MASK	((DCACHE_SIZE / 64 - 1) << CACHE_WAYS)
70 #define ICACHE_MAX_ADDR	ICACHE_SET_MASK
71 #define DCACHE_MAX_ADDR	DCACHE_SET_MASK
72 
73 /*
74  *	Version 4 cores have a true harvard style separate instruction
75  *	and data cache. Enable data and instruction caches, also enable write
76  *	buffers and branch accelerator.
77  */
78 /* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
79 /* use '+' instead of '|' for assembler's sake */
80 
81 	/* Enable data cache */
82 	/* Enable data store buffer */
83 	/* outside ACRs : No cache, precise */
84 	/* Enable instruction+branch caches */
85 #if defined(CONFIG_M5407)
86 #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
87 #else
88 #define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP)
89 #endif
90 #define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
91 
92 #if defined(CONFIG_MMU)
93 /*
94  *	If running with the MMU enabled then we need to map the internal
95  *	register region as non-cacheable. And then we map all our RAM as
96  *	cacheable and supervisor access only.
97  */
98 #define ACR0_MODE	(ACR_BA(IOMEMBASE)+ACR_ADMSK(IOMEMSIZE)+ \
99 			 ACR_ENABLE+ACR_SUPER+ACR_CM_OFF_PRE+ACR_SP)
100 #if defined(CONFIG_CACHE_COPYBACK)
101 #define ACR1_MODE	(ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
102 			 ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_CP)
103 #else
104 #define ACR1_MODE	(ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
105 			 ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_WT)
106 #endif
107 #define ACR2_MODE	0
108 #define ACR3_MODE	(ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
109 			 ACR_ENABLE+ACR_SUPER+ACR_SP)
110 
111 #else
112 
113 /*
114  *	For the non-MMU enabled case we map all of RAM as cacheable.
115  */
116 #if defined(CONFIG_CACHE_COPYBACK)
117 #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP)
118 #else
119 #define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
120 #endif
121 #define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)
122 
123 #define CACHE_INVALIDATE  (CACHE_MODE+CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
124 #define CACHE_INVALIDATEI (CACHE_MODE+CACR_BCINVA+CACR_ICINVA)
125 #define CACHE_INVALIDATED (CACHE_MODE+CACR_DCINVA)
126 #define ACR0_MODE	(0x000f0000+DATA_CACHE_MODE)
127 #define ACR1_MODE	0
128 #define ACR2_MODE	(0x000f0000+INSN_CACHE_MODE)
129 #define ACR3_MODE	0
130 
131 #if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
132 /* Copyback cache mode must push dirty cache lines first */
133 #define	CACHE_PUSH
134 #endif
135 
136 #endif /* CONFIG_MMU */
137 #endif	/* m54xxacr_h */
138