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1 | /* |
2 | * Software MMU support | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | #if DATA_SIZE == 8 | |
21 | #define SUFFIX q | |
22 | #define DATA_TYPE uint64_t | |
23 | #elif DATA_SIZE == 4 | |
24 | #define SUFFIX l | |
25 | #define DATA_TYPE uint32_t | |
26 | #elif DATA_SIZE == 2 | |
27 | #define SUFFIX w | |
28 | #define DATA_TYPE uint16_t | |
29 | #define DATA_STYPE int16_t | |
30 | #elif DATA_SIZE == 1 | |
31 | #define SUFFIX b | |
32 | #define DATA_TYPE uint8_t | |
33 | #define DATA_STYPE int8_t | |
34 | #else | |
35 | #error unsupported data size | |
36 | #endif | |
37 | ||
38 | #if MEMUSER == 0 | |
39 | #define MEMSUFFIX _kernel | |
40 | #else | |
41 | #define MEMSUFFIX _user | |
42 | #endif | |
43 | ||
44 | #if DATA_SIZE == 8 | |
45 | #define RES_TYPE uint64_t | |
46 | #else | |
47 | #define RES_TYPE int | |
48 | #endif | |
49 | ||
50 | ||
51 | #if MEMUSER == 0 | |
52 | DATA_TYPE __attribute((regparm(1))) glue(glue(__ld, SUFFIX), _mmu)(unsigned long addr); | |
53 | void __attribute((regparm(2))) glue(glue(__st, SUFFIX), _mmu)(unsigned long addr, DATA_TYPE v); | |
54 | #endif | |
55 | ||
56 | static inline int glue(glue(ldu, SUFFIX), MEMSUFFIX)(void *ptr) | |
57 | { | |
58 | int index; | |
59 | RES_TYPE res; | |
60 | unsigned long addr, physaddr; | |
61 | addr = (unsigned long)ptr; | |
62 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
63 | if (__builtin_expect(env->tlb_read[MEMUSER][index].address != | |
64 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { | |
65 | res = glue(glue(__ld, SUFFIX), _mmu)(addr); | |
66 | } else { | |
67 | physaddr = addr + env->tlb_read[MEMUSER][index].addend; | |
68 | res = glue(glue(ldu, SUFFIX), _raw)((uint8_t *)physaddr); | |
69 | } | |
70 | return res; | |
71 | } | |
72 | ||
73 | #if DATA_SIZE <= 2 | |
74 | static inline int glue(glue(lds, SUFFIX), MEMSUFFIX)(void *ptr) | |
75 | { | |
76 | int res, index; | |
77 | unsigned long addr, physaddr; | |
78 | addr = (unsigned long)ptr; | |
79 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
80 | if (__builtin_expect(env->tlb_read[MEMUSER][index].address != | |
81 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { | |
82 | res = (DATA_STYPE)glue(glue(__ld, SUFFIX), _mmu)(addr); | |
83 | } else { | |
84 | physaddr = addr + env->tlb_read[MEMUSER][index].addend; | |
85 | res = glue(glue(lds, SUFFIX), _raw)((uint8_t *)physaddr); | |
86 | } | |
87 | return res; | |
88 | } | |
89 | #endif | |
90 | ||
91 | static inline void glue(glue(st, SUFFIX), MEMSUFFIX)(void *ptr, RES_TYPE v) | |
92 | { | |
93 | int index; | |
94 | unsigned long addr, physaddr; | |
95 | addr = (unsigned long)ptr; | |
96 | index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1); | |
97 | if (__builtin_expect(env->tlb_write[MEMUSER][index].address != | |
98 | (addr & (TARGET_PAGE_MASK | (DATA_SIZE - 1))), 0)) { | |
99 | glue(glue(__st, SUFFIX), _mmu)(addr, v); | |
100 | } else { | |
101 | physaddr = addr + env->tlb_write[MEMUSER][index].addend; | |
102 | glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, v); | |
103 | } | |
104 | } | |
105 | ||
106 | #undef RES_TYPE | |
107 | #undef DATA_TYPE | |
108 | #undef DATA_STYPE | |
109 | #undef SUFFIX | |
110 | #undef DATA_SIZE | |
111 | #undef MEMSUFFIX |