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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Definitions for Sun3 custom MMU.
4 */
5#ifndef __SUN3_MMU_H__
6#define __SUN3_MMU_H__
7
8#include <linux/types.h>
9#include <asm/movs.h>
10#include <asm/sun3-head.h>
11
12/* MMU characteristics. */
13#define SUN3_SEGMAPS_PER_CONTEXT 2048
14#define SUN3_PMEGS_NUM 256
15#define SUN3_CONTEXTS_NUM 8
16
17#define SUN3_PMEG_SIZE_BITS 17
18#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
19#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
20
21#define SUN3_PTE_SIZE_BITS 13
22#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
23#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
24
25#define SUN3_CONTROL_MASK (0x0FFFFFFC)
26#define SUN3_INVALID_PMEG 255
27#define SUN3_INVALID_CONTEXT 255
28
29#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
30#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
31#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
32#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
33#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
34#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
35#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
36#define AC_SYNC_ERR 0x60000000 /* c fault type */
37#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
38#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
39#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
40#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
41#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
42#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
43#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
44#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
45#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
46
47#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
48 | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
49
50/* Bus access type within PTE. */
51#define SUN3_PAGE_TYPE_MASK (0x0c000000)
52#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
53#define SUN3_PAGE_TYPE_IO (0x04000000)
54#define SUN3_PAGE_TYPE_VME16 (0x08000000)
55#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
56
57/* Mask for page number within PTE. */
58#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
59
60/* Bits within bus-error register. */
61#define SUN3_BUSERR_WATCHDOG (0x01)
62#define SUN3_BUSERR_unused (0x02)
63#define SUN3_BUSERR_FPAENERR (0x04)
64#define SUN3_BUSERR_FPABERR (0x08)
65#define SUN3_BUSERR_VMEBERR (0x10)
66#define SUN3_BUSERR_TIMEOUT (0x20)
67#define SUN3_BUSERR_PROTERR (0x40)
68#define SUN3_BUSERR_INVALID (0x80)
69
70#ifndef __ASSEMBLY__
71
72/* Read bus error status register (implicitly clearing it). */
73static inline unsigned char sun3_get_buserr(void)
74{
75 unsigned char sfc, c;
76
77 GET_SFC (sfc);
78 SET_SFC (FC_CONTROL);
79 GET_CONTROL_BYTE (AC_BUS_ERROR, c);
80 SET_SFC (sfc);
81
82 return c;
83}
84
85/* Read segmap from hardware MMU. */
86static inline unsigned long sun3_get_segmap(unsigned long addr)
87{
88 register unsigned long entry;
89 unsigned char c, sfc;
90
91 GET_SFC (sfc);
92 SET_SFC (FC_CONTROL);
93 GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
94 SET_SFC (sfc);
95 entry = c;
96
97 return entry;
98}
99
100/* Write segmap to hardware MMU. */
101static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
102{
103 unsigned char sfc;
104
105 GET_DFC (sfc);
106 SET_DFC (FC_CONTROL);
107 SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
108 SET_DFC (sfc);
109
110 return;
111}
112
113/* Read PTE from hardware MMU. */
114static inline unsigned long sun3_get_pte(unsigned long addr)
115{
116 register unsigned long entry;
117 unsigned char sfc;
118
119 GET_SFC (sfc);
120 SET_SFC (FC_CONTROL);
121 GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
122 SET_SFC (sfc);
123
124 return entry;
125}
126
127/* Write PTE to hardware MMU. */
128static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
129{
130 unsigned char sfc;
131
132 GET_DFC (sfc);
133 SET_DFC (FC_CONTROL);
134 SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
135 SET_DFC (sfc);
136
137 return;
138}
139
140/* get current context */
141static inline unsigned char sun3_get_context(void)
142{
143 unsigned char sfc, c;
144
145 GET_SFC(sfc);
146 SET_SFC(FC_CONTROL);
147 GET_CONTROL_BYTE(AC_CONTEXT, c);
148 SET_SFC(sfc);
149
150 return c;
151}
152
153/* set alternate context */
154static inline void sun3_put_context(unsigned char c)
155{
156 unsigned char dfc;
157 GET_DFC(dfc);
158 SET_DFC(FC_CONTROL);
159 SET_CONTROL_BYTE(AC_CONTEXT, c);
160 SET_DFC(dfc);
161
162 return;
163}
164
165extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
166 unsigned long type);
167
168extern int sun3_map_test(unsigned long addr, char *val);
169
170#endif /* !__ASSEMBLY__ */
171
172#endif /* !__SUN3_MMU_H__ */
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Definitions for Sun3 custom MMU.
4 */
5#ifndef __SUN3_MMU_H__
6#define __SUN3_MMU_H__
7
8#include <linux/types.h>
9#include <asm/movs.h>
10#include <asm/sun3-head.h>
11
12/* MMU characteristics. */
13#define SUN3_SEGMAPS_PER_CONTEXT 2048
14#define SUN3_PMEGS_NUM 256
15#define SUN3_CONTEXTS_NUM 8
16
17#define SUN3_PMEG_SIZE_BITS 17
18#define SUN3_PMEG_SIZE (1 << SUN3_PMEG_SIZE_BITS)
19#define SUN3_PMEG_MASK (SUN3_PMEG_SIZE - 1)
20
21#define SUN3_PTE_SIZE_BITS 13
22#define SUN3_PTE_SIZE (1 << SUN3_PTE_SIZE_BITS)
23#define SUN3_PTE_MASK (SUN3_PTE_SIZE - 1)
24
25#define SUN3_CONTROL_MASK (0x0FFFFFFC)
26#define SUN3_INVALID_PMEG 255
27#define SUN3_INVALID_CONTEXT 255
28
29#define AC_IDPROM 0x00000000 /* 34 ID PROM, R/O, byte, 32 bytes */
30#define AC_PAGEMAP 0x10000000 /* 3 Pagemap R/W, long */
31#define AC_SEGMAP 0x20000000 /* 3 Segment map, byte */
32#define AC_CONTEXT 0x30000000 /* 34c current mmu-context */
33#define AC_SENABLE 0x40000000 /* 34c system dvma/cache/reset enable reg*/
34#define AC_UDVMA_ENB 0x50000000 /* 34 Not used on Sun boards, byte */
35#define AC_BUS_ERROR 0x60000000 /* 34 Cleared on read, byte. */
36#define AC_SYNC_ERR 0x60000000 /* c fault type */
37#define AC_SYNC_VA 0x60000004 /* c fault virtual address */
38#define AC_ASYNC_ERR 0x60000008 /* c asynchronous fault type */
39#define AC_ASYNC_VA 0x6000000c /* c async fault virtual address */
40#define AC_LEDS 0x70000000 /* 34 Zero turns on LEDs, byte */
41#define AC_CACHETAGS 0x80000000 /* 34c direct access to the VAC tags */
42#define AC_CACHEDDATA 0x90000000 /* 3 c direct access to the VAC data */
43#define AC_UDVMA_MAP 0xD0000000 /* 4 Not used on Sun boards, byte */
44#define AC_VME_VECTOR 0xE0000000 /* 4 For non-Autovector VME, byte */
45#define AC_BOOT_SCC 0xF0000000 /* 34 bypass to access Zilog 8530. byte.*/
46
47#define SUN3_PAGE_CHG_MASK (SUN3_PAGE_PGNUM_MASK \
48 | SUN3_PAGE_ACCESSED | SUN3_PAGE_MODIFIED)
49
50/* Bus access type within PTE. */
51#define SUN3_PAGE_TYPE_MASK (0x0c000000)
52#define SUN3_PAGE_TYPE_MEMORY (0x00000000)
53#define SUN3_PAGE_TYPE_IO (0x04000000)
54#define SUN3_PAGE_TYPE_VME16 (0x08000000)
55#define SUN3_PAGE_TYPE_VME32 (0x0c000000)
56
57/* Mask for page number within PTE. */
58#define SUN3_PAGE_PGNUM_MASK (0x0007FFFF)
59
60/* Bits within bus-error register. */
61#define SUN3_BUSERR_WATCHDOG (0x01)
62#define SUN3_BUSERR_unused (0x02)
63#define SUN3_BUSERR_FPAENERR (0x04)
64#define SUN3_BUSERR_FPABERR (0x08)
65#define SUN3_BUSERR_VMEBERR (0x10)
66#define SUN3_BUSERR_TIMEOUT (0x20)
67#define SUN3_BUSERR_PROTERR (0x40)
68#define SUN3_BUSERR_INVALID (0x80)
69
70#ifndef __ASSEMBLY__
71
72/* Read bus error status register (implicitly clearing it). */
73static inline unsigned char sun3_get_buserr(void)
74{
75 unsigned char sfc, c;
76
77 GET_SFC (sfc);
78 SET_SFC (FC_CONTROL);
79 GET_CONTROL_BYTE (AC_BUS_ERROR, c);
80 SET_SFC (sfc);
81
82 return c;
83}
84
85/* Read segmap from hardware MMU. */
86static inline unsigned long sun3_get_segmap(unsigned long addr)
87{
88 register unsigned long entry;
89 unsigned char c, sfc;
90
91 GET_SFC (sfc);
92 SET_SFC (FC_CONTROL);
93 GET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), c);
94 SET_SFC (sfc);
95 entry = c;
96
97 return entry;
98}
99
100/* Write segmap to hardware MMU. */
101static inline void sun3_put_segmap(unsigned long addr, unsigned long entry)
102{
103 unsigned char sfc;
104
105 GET_DFC (sfc);
106 SET_DFC (FC_CONTROL);
107 SET_CONTROL_BYTE (AC_SEGMAP | (addr & SUN3_CONTROL_MASK), entry);
108 SET_DFC (sfc);
109
110 return;
111}
112
113/* Read PTE from hardware MMU. */
114static inline unsigned long sun3_get_pte(unsigned long addr)
115{
116 register unsigned long entry;
117 unsigned char sfc;
118
119 GET_SFC (sfc);
120 SET_SFC (FC_CONTROL);
121 GET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
122 SET_SFC (sfc);
123
124 return entry;
125}
126
127/* Write PTE to hardware MMU. */
128static inline void sun3_put_pte(unsigned long addr, unsigned long entry)
129{
130 unsigned char sfc;
131
132 GET_DFC (sfc);
133 SET_DFC (FC_CONTROL);
134 SET_CONTROL_WORD (AC_PAGEMAP | (addr & SUN3_CONTROL_MASK), entry);
135 SET_DFC (sfc);
136
137 return;
138}
139
140/* get current context */
141static inline unsigned char sun3_get_context(void)
142{
143 unsigned char sfc, c;
144
145 GET_SFC(sfc);
146 SET_SFC(FC_CONTROL);
147 GET_CONTROL_BYTE(AC_CONTEXT, c);
148 SET_SFC(sfc);
149
150 return c;
151}
152
153/* set alternate context */
154static inline void sun3_put_context(unsigned char c)
155{
156 unsigned char dfc;
157 GET_DFC(dfc);
158 SET_DFC(FC_CONTROL);
159 SET_CONTROL_BYTE(AC_CONTEXT, c);
160 SET_DFC(dfc);
161
162 return;
163}
164
165extern void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
166 unsigned long type);
167
168extern int sun3_map_test(unsigned long addr, char *val);
169
170#endif /* !__ASSEMBLY__ */
171
172#endif /* !__SUN3_MMU_H__ */