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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
Al Virocbff6762006-10-14 16:53:38 +01007#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <asm/movs.h>
9#include <asm/sun3-head.h>
10
11/* MMU characteristics. */
12#define SUN3_SEGMAPS_PER_CONTEXT 2048
13#define SUN3_PMEGS_NUM 256
14#define SUN3_CONTEXTS_NUM 8
15
16#define SUN3_PMEG_SIZE_BITS 17
17#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
18#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
19
20#define SUN3_PTE_SIZE_BITS 13
21#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
22#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
23
24#define SUN3_CONTROL_MASK (0x0FFFFFFC)
25#define SUN3_INVALID_PMEG 255
26#define SUN3_INVALID_CONTEXT 255
27
28#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
29#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
30#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
31#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
32#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
33#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
34#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
35#define AC_SYNC_ERR 0x60000000 /* c fault type */
36#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
37#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
38#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
39#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
40#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
41#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
42#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
43#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
44#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
45
46#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
47 | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
48
49/* Bus access type within PTE. */
50#define SUN3_PAGE_TYPE_MASK (0x0c000000)
51#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
52#define SUN3_PAGE_TYPE_IO (0x04000000)
53#define SUN3_PAGE_TYPE_VME16 (0x08000000)
54#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
55
56/* Mask for page number within PTE. */
57#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
58
59/* Bits within bus-error register. */
60#define SUN3_BUSERR_WATCHDOG (0x01)
61#define SUN3_BUSERR_unused (0x02)
62#define SUN3_BUSERR_FPAENERR (0x04)
63#define SUN3_BUSERR_FPABERR (0x08)
64#define SUN3_BUSERR_VMEBERR (0x10)
65#define SUN3_BUSERR_TIMEOUT (0x20)
66#define SUN3_BUSERR_PROTERR (0x40)
67#define SUN3_BUSERR_INVALID (0x80)
68
69#ifndef __ASSEMBLY__
70
71/* Read bus error status register (implicitly clearing it). */
72static inline unsigned char sun3_get_buserr(void)
73{
74 unsigned char sfc, c;
75
76 GET_SFC (sfc);
77 SET_SFC (FC_CONTROL);
78 GET_CONTROL_BYTE (AC_BUS_ERROR, c);
79 SET_SFC (sfc);
80
81 return c;
82}
83
84/* Read segmap from hardware MMU. */
85static inline unsigned long sun3_get_segmap(unsigned long addr)
86{
87 register unsigned long entry;
88 unsigned char c, sfc;
89
90 GET_SFC (sfc);
91 SET_SFC (FC_CONTROL);
92 GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
93 SET_SFC (sfc);
94 entry = c;
95
96 return entry;
97}
98
99/* Write segmap to hardware MMU. */
100static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
101{
102 unsigned char sfc;
103
104 GET_DFC (sfc);
105 SET_DFC (FC_CONTROL);
106 SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
107 SET_DFC (sfc);
108
109 return;
110}
111
112/* Read PTE from hardware MMU. */
113static inline unsigned long sun3_get_pte(unsigned long addr)
114{
115 register unsigned long entry;
116 unsigned char sfc;
117
118 GET_SFC (sfc);
119 SET_SFC (FC_CONTROL);
120 GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
121 SET_SFC (sfc);
122
123 return entry;
124}
125
126/* Write PTE to hardware MMU. */
127static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
128{
129 unsigned char sfc;
130
131 GET_DFC (sfc);
132 SET_DFC (FC_CONTROL);
133 SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
134 SET_DFC (sfc);
135
136 return;
137}
138
139/* get current context */
140static inline unsigned char sun3_get_context(void)
141{
142 unsigned char sfc, c;
143
144 GET_SFC(sfc);
145 SET_SFC(FC_CONTROL);
146 GET_CONTROL_BYTE(AC_CONTEXT, c);
147 SET_SFC(sfc);
148
149 return c;
150}
151
152/* set alternate context */
153static inline void sun3_put_context(unsigned char c)
154{
155 unsigned char dfc;
156 GET_DFC(dfc);
157 SET_DFC(FC_CONTROL);
158 SET_CONTROL_BYTE(AC_CONTEXT, c);
159 SET_DFC(dfc);
160
161 return;
162}
163
Al Virocbff6762006-10-14 16:53:38 +0100164extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 unsigned long type);
166
167extern int sun3_map_test(unsigned long addr, char *val);
168
169#endif /* !__ASSEMBLY__ */
170
171#endif /* !__SUN3_MMU_H__ */