Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Definitions for Sun3 custom MMU. | |
3 | */ | |
4 | #ifndef __SUN3_MMU_H__ | |
5 | #define __SUN3_MMU_H__ | |
6 | ||
7 | #include <asm/movs.h> | |
8 | #include <asm/sun3-head.h> | |
9 | ||
10 | /* MMU characteristics. */ | |
11 | #define SUN3_SEGMAPS_PER_CONTEXT 2048 | |
12 | #define SUN3_PMEGS_NUM 256 | |
13 | #define SUN3_CONTEXTS_NUM 8 | |
14 | ||
15 | #define SUN3_PMEG_SIZE_BITS 17 | |
16 | #define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS) | |
17 | #define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1) | |
18 | ||
19 | #define SUN3_PTE_SIZE_BITS 13 | |
20 | #define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS) | |
21 | #define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1) | |
22 | ||
23 | #define SUN3_CONTROL_MASK (0x0FFFFFFC) | |
24 | #define SUN3_INVALID_PMEG 255 | |
25 | #define SUN3_INVALID_CONTEXT 255 | |
26 | ||
27 | #define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */ | |
28 | #define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */ | |
29 | #define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */ | |
30 | #define AC_CONTEXT 0x30000000 /* 34c current mmu-context */ | |
31 | #define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/ | |
32 | #define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */ | |
33 | #define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */ | |
34 | #define AC_SYNC_ERR 0x60000000 /* c fault type */ | |
35 | #define AC_SYNC_VA 0x60000004 /* c fault virtual address */ | |
36 | #define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */ | |
37 | #define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */ | |
38 | #define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */ | |
39 | #define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */ | |
40 | #define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */ | |
41 | #define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */ | |
42 | #define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */ | |
43 | #define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/ | |
44 | ||
45 | #define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \ | |
46 | | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED) | |
47 | ||
48 | /* Bus access type within PTE. */ | |
49 | #define SUN3_PAGE_TYPE_MASK (0x0c000000) | |
50 | #define SUN3_PAGE_TYPE_MEMORY (0x00000000) | |
51 | #define SUN3_PAGE_TYPE_IO (0x04000000) | |
52 | #define SUN3_PAGE_TYPE_VME16 (0x08000000) | |
53 | #define SUN3_PAGE_TYPE_VME32 (0x0c000000) | |
54 | ||
55 | /* Mask for page number within PTE. */ | |
56 | #define SUN3_PAGE_PGNUM_MASK (0x0007FFFF) | |
57 | ||
58 | /* Bits within bus-error register. */ | |
59 | #define SUN3_BUSERR_WATCHDOG (0x01) | |
60 | #define SUN3_BUSERR_unused (0x02) | |
61 | #define SUN3_BUSERR_FPAENERR (0x04) | |
62 | #define SUN3_BUSERR_FPABERR (0x08) | |
63 | #define SUN3_BUSERR_VMEBERR (0x10) | |
64 | #define SUN3_BUSERR_TIMEOUT (0x20) | |
65 | #define SUN3_BUSERR_PROTERR (0x40) | |
66 | #define SUN3_BUSERR_INVALID (0x80) | |
67 | ||
68 | #ifndef __ASSEMBLY__ | |
69 | ||
70 | /* Read bus error status register (implicitly clearing it). */ | |
71 | static inline unsigned char sun3_get_buserr(void) | |
72 | { | |
73 | unsigned char sfc, c; | |
74 | ||
75 | GET_SFC (sfc); | |
76 | SET_SFC (FC_CONTROL); | |
77 | GET_CONTROL_BYTE (AC_BUS_ERROR, c); | |
78 | SET_SFC (sfc); | |
79 | ||
80 | return c; | |
81 | } | |
82 | ||
83 | /* Read segmap from hardware MMU. */ | |
84 | static inline unsigned long sun3_get_segmap(unsigned long addr) | |
85 | { | |
86 | register unsigned long entry; | |
87 | unsigned char c, sfc; | |
88 | ||
89 | GET_SFC (sfc); | |
90 | SET_SFC (FC_CONTROL); | |
91 | GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c); | |
92 | SET_SFC (sfc); | |
93 | entry = c; | |
94 | ||
95 | return entry; | |
96 | } | |
97 | ||
98 | /* Write segmap to hardware MMU. */ | |
99 | static inline void sun3_put_segmap(unsigned long addr, unsigned long entry) | |
100 | { | |
101 | unsigned char sfc; | |
102 | ||
103 | GET_DFC (sfc); | |
104 | SET_DFC (FC_CONTROL); | |
105 | SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry); | |
106 | SET_DFC (sfc); | |
107 | ||
108 | return; | |
109 | } | |
110 | ||
111 | /* Read PTE from hardware MMU. */ | |
112 | static inline unsigned long sun3_get_pte(unsigned long addr) | |
113 | { | |
114 | register unsigned long entry; | |
115 | unsigned char sfc; | |
116 | ||
117 | GET_SFC (sfc); | |
118 | SET_SFC (FC_CONTROL); | |
119 | GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry); | |
120 | SET_SFC (sfc); | |
121 | ||
122 | return entry; | |
123 | } | |
124 | ||
125 | /* Write PTE to hardware MMU. */ | |
126 | static inline void sun3_put_pte(unsigned long addr, unsigned long entry) | |
127 | { | |
128 | unsigned char sfc; | |
129 | ||
130 | GET_DFC (sfc); | |
131 | SET_DFC (FC_CONTROL); | |
132 | SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry); | |
133 | SET_DFC (sfc); | |
134 | ||
135 | return; | |
136 | } | |
137 | ||
138 | /* get current context */ | |
139 | static inline unsigned char sun3_get_context(void) | |
140 | { | |
141 | unsigned char sfc, c; | |
142 | ||
143 | GET_SFC(sfc); | |
144 | SET_SFC(FC_CONTROL); | |
145 | GET_CONTROL_BYTE(AC_CONTEXT, c); | |
146 | SET_SFC(sfc); | |
147 | ||
148 | return c; | |
149 | } | |
150 | ||
151 | /* set alternate context */ | |
152 | static inline void sun3_put_context(unsigned char c) | |
153 | { | |
154 | unsigned char dfc; | |
155 | GET_DFC(dfc); | |
156 | SET_DFC(FC_CONTROL); | |
157 | SET_CONTROL_BYTE(AC_CONTEXT, c); | |
158 | SET_DFC(dfc); | |
159 | ||
160 | return; | |
161 | } | |
162 | ||
163 | extern void *sun3_ioremap(unsigned long phys, unsigned long size, | |
164 | unsigned long type); | |
165 | ||
166 | extern int sun3_map_test(unsigned long addr, char *val); | |
167 | ||
168 | #endif /* !__ASSEMBLY__ */ | |
169 | ||
170 | #endif /* !__SUN3_MMU_H__ */ |