4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
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
20 #define DATA_SIZE (1 << SHIFT)
25 #define DATA_TYPE uint64_t
29 #define DATA_TYPE uint32_t
33 #define DATA_TYPE uint16_t
37 #define DATA_TYPE uint8_t
39 #error unsupported data size
42 static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
45 static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr,
50 static inline DATA_TYPE glue(io_read, SUFFIX)(unsigned long physaddr,
51 unsigned long tlb_addr)
56 index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
58 res = io_mem_read[index][SHIFT](physaddr);
60 #ifdef TARGET_WORDS_BIGENDIAN
61 res = (uint64_t)io_mem_read[index][2](physaddr) << 32;
62 res |= io_mem_read[index][2](physaddr + 4);
64 res = io_mem_read[index][2](physaddr);
65 res |= (uint64_t)io_mem_read[index][2](physaddr + 4) << 32;
67 #endif /* SHIFT > 2 */
71 static inline void glue(io_write, SUFFIX)(unsigned long physaddr,
73 unsigned long tlb_addr)
77 index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
79 io_mem_write[index][SHIFT](physaddr, val, tlb_addr);
81 #ifdef TARGET_WORDS_BIGENDIAN
82 io_mem_write[index][2](physaddr, val >> 32, tlb_addr);
83 io_mem_write[index][2](physaddr + 4, val, tlb_addr);
85 io_mem_write[index][2](physaddr, val, tlb_addr);
86 io_mem_write[index][2](physaddr + 4, val >> 32, tlb_addr);
88 #endif /* SHIFT > 2 */
91 /* handle all cases except unaligned access which span two pages */
92 DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
97 unsigned long physaddr, tlb_addr;
100 /* test if there is match for unaligned or IO access */
101 /* XXX: could done more in memory macro in a non portable way */
102 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
104 tlb_addr = env->tlb_read[is_user][index].address;
105 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
106 physaddr = addr + env->tlb_read[is_user][index].addend;
107 if (tlb_addr & ~TARGET_PAGE_MASK) {
109 if ((addr & (DATA_SIZE - 1)) != 0)
110 goto do_unaligned_access;
111 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
112 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
113 /* slow unaligned access (it spans two pages or IO) */
116 res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
119 /* unaligned access in the same page */
120 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
123 /* the page is not in the TLB : fill it */
125 tlb_fill(addr, 0, is_user, retaddr);
131 /* handle all unaligned cases */
132 static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
136 DATA_TYPE res, res1, res2;
138 unsigned long physaddr, tlb_addr, addr1, addr2;
140 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
142 tlb_addr = env->tlb_read[is_user][index].address;
143 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
144 physaddr = addr + env->tlb_read[is_user][index].addend;
145 if (tlb_addr & ~TARGET_PAGE_MASK) {
147 if ((addr & (DATA_SIZE - 1)) != 0)
148 goto do_unaligned_access;
149 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
150 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
152 /* slow unaligned access (it spans two pages) */
153 addr1 = addr & ~(DATA_SIZE - 1);
154 addr2 = addr1 + DATA_SIZE;
155 res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
157 res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
159 shift = (addr & (DATA_SIZE - 1)) * 8;
160 #ifdef TARGET_WORDS_BIGENDIAN
161 res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
163 res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
165 res = (DATA_TYPE)res;
167 /* unaligned/aligned access in the same page */
168 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
171 /* the page is not in the TLB : fill it */
172 tlb_fill(addr, 0, is_user, retaddr);
179 void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr,
183 unsigned long physaddr, tlb_addr;
187 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
189 tlb_addr = env->tlb_write[is_user][index].address;
190 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
191 physaddr = addr + env->tlb_write[is_user][index].addend;
192 if (tlb_addr & ~TARGET_PAGE_MASK) {
194 if ((addr & (DATA_SIZE - 1)) != 0)
195 goto do_unaligned_access;
196 glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
197 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
200 glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
203 /* aligned/unaligned access in the same page */
204 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
207 /* the page is not in the TLB : fill it */
209 tlb_fill(addr, 1, is_user, retaddr);
214 /* handles all unaligned cases */
215 static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr,
220 unsigned long physaddr, tlb_addr;
223 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
225 tlb_addr = env->tlb_write[is_user][index].address;
226 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
227 physaddr = addr + env->tlb_write[is_user][index].addend;
228 if (tlb_addr & ~TARGET_PAGE_MASK) {
230 if ((addr & (DATA_SIZE - 1)) != 0)
231 goto do_unaligned_access;
232 glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
233 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
235 /* XXX: not efficient, but simple */
236 for(i = 0;i < DATA_SIZE; i++) {
237 #ifdef TARGET_WORDS_BIGENDIAN
238 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
241 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
246 /* aligned/unaligned access in the same page */
247 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
250 /* the page is not in the TLB : fill it */
251 tlb_fill(addr, 1, is_user, retaddr);