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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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). */
71static 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. */
84static 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. */
99static 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. */
112static 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. */
126static 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 */
139static 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 */
152static 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
163extern void *sun3_ioremap(unsigned long phys, unsigned long size,
164 unsigned long type);
165
166extern int sun3_map_test(unsigned long addr, char *val);
167
168#endif /* !__ASSEMBLY__ */
169
170#endif /* !__SUN3_MMU_H__ */