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)
24 #define DATA_TYPE uint64_t
27 #define DATA_TYPE uint32_t
30 #define DATA_TYPE uint16_t
33 #define DATA_TYPE uint8_t
35 #error unsupported data size
38 static DATA_TYPE glue(slow_ld, SUFFIX)(unsigned long addr, void *retaddr);
39 static void glue(slow_st, SUFFIX)(unsigned long addr, DATA_TYPE val,
42 static inline DATA_TYPE glue(io_read, SUFFIX)(unsigned long physaddr,
43 unsigned long tlb_addr)
48 index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
50 res = io_mem_read[index][SHIFT](physaddr);
52 #ifdef TARGET_WORDS_BIGENDIAN
53 res = (uint64_t)io_mem_read[index][2](physaddr) << 32;
54 res |= io_mem_read[index][2](physaddr + 4);
56 res = io_mem_read[index][2](physaddr);
57 res |= (uint64_t)io_mem_read[index][2](physaddr + 4) << 32;
59 #endif /* SHIFT > 2 */
63 static inline void glue(io_write, SUFFIX)(unsigned long physaddr,
65 unsigned long tlb_addr)
69 index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
71 io_mem_write[index][SHIFT](physaddr, val);
73 #ifdef TARGET_WORDS_BIGENDIAN
74 io_mem_write[index][2](physaddr, val >> 32);
75 io_mem_write[index][2](physaddr + 4, val);
77 io_mem_write[index][2](physaddr, val);
78 io_mem_write[index][2](physaddr + 4, val >> 32);
80 #endif /* SHIFT > 2 */
83 /* handle all cases except unaligned access which span two pages */
84 DATA_TYPE __attribute((regparm(1))) glue(glue(__ld, SUFFIX), _mmu)(unsigned long addr)
88 unsigned long physaddr, tlb_addr;
91 /* test if there is match for unaligned or IO access */
92 /* XXX: could done more in memory macro in a non portable way */
93 is_user = (env->cpl == 3);
94 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
96 tlb_addr = env->tlb_read[is_user][index].address;
97 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
98 physaddr = addr + env->tlb_read[is_user][index].addend;
99 if (tlb_addr & ~TARGET_PAGE_MASK) {
101 if ((addr & (DATA_SIZE - 1)) != 0)
102 goto do_unaligned_access;
103 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
104 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
105 /* slow unaligned access (it spans two pages or IO) */
107 retaddr = __builtin_return_address(0);
108 res = glue(slow_ld, SUFFIX)(addr, retaddr);
110 /* unaligned access in the same page */
111 res = glue(glue(ldu, SUFFIX), _raw)((uint8_t *)physaddr);
114 /* the page is not in the TLB : fill it */
115 retaddr = __builtin_return_address(0);
116 tlb_fill(addr, 0, retaddr);
122 /* handle all unaligned cases */
123 static DATA_TYPE glue(slow_ld, SUFFIX)(unsigned long addr, void *retaddr)
125 DATA_TYPE res, res1, res2;
126 int is_user, index, shift;
127 unsigned long physaddr, tlb_addr, addr1, addr2;
129 is_user = (env->cpl == 3);
130 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
132 tlb_addr = env->tlb_read[is_user][index].address;
133 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
134 physaddr = addr + env->tlb_read[is_user][index].addend;
135 if (tlb_addr & ~TARGET_PAGE_MASK) {
137 if ((addr & (DATA_SIZE - 1)) != 0)
138 goto do_unaligned_access;
139 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
140 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
142 /* slow unaligned access (it spans two pages) */
143 addr1 = addr & ~(DATA_SIZE - 1);
144 addr2 = addr1 + DATA_SIZE;
145 res1 = glue(slow_ld, SUFFIX)(addr1, retaddr);
146 res2 = glue(slow_ld, SUFFIX)(addr2, retaddr);
147 shift = (addr & (DATA_SIZE - 1)) * 8;
148 #ifdef TARGET_WORDS_BIGENDIAN
149 res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
151 res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
154 /* unaligned/aligned access in the same page */
155 res = glue(glue(ldu, SUFFIX), _raw)((uint8_t *)physaddr);
158 /* the page is not in the TLB : fill it */
159 tlb_fill(addr, 0, retaddr);
166 void __attribute((regparm(2))) glue(glue(__st, SUFFIX), _mmu)(unsigned long addr, DATA_TYPE val)
168 unsigned long physaddr, tlb_addr;
172 is_user = (env->cpl == 3);
173 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
175 tlb_addr = env->tlb_write[is_user][index].address;
176 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
177 physaddr = addr + env->tlb_read[is_user][index].addend;
178 if (tlb_addr & ~TARGET_PAGE_MASK) {
180 if ((addr & (DATA_SIZE - 1)) != 0)
181 goto do_unaligned_access;
182 glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
183 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
185 retaddr = __builtin_return_address(0);
186 glue(slow_st, SUFFIX)(addr, val, retaddr);
188 /* aligned/unaligned access in the same page */
189 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
192 /* the page is not in the TLB : fill it */
193 retaddr = __builtin_return_address(0);
194 tlb_fill(addr, 1, retaddr);
199 /* handles all unaligned cases */
200 static void glue(slow_st, SUFFIX)(unsigned long addr, DATA_TYPE val,
203 unsigned long physaddr, tlb_addr;
204 int is_user, index, i;
206 is_user = (env->cpl == 3);
207 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
209 tlb_addr = env->tlb_write[is_user][index].address;
210 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
211 physaddr = addr + env->tlb_read[is_user][index].addend;
212 if (tlb_addr & ~TARGET_PAGE_MASK) {
214 if ((addr & (DATA_SIZE - 1)) != 0)
215 goto do_unaligned_access;
216 glue(io_write, SUFFIX)(physaddr, val, tlb_addr);
217 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
219 /* XXX: not efficient, but simple */
220 for(i = 0;i < DATA_SIZE; i++) {
221 #ifdef TARGET_WORDS_BIGENDIAN
222 slow_stb(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)), retaddr);
224 slow_stb(addr + i, val >> (i * 8), retaddr);
228 /* aligned/unaligned access in the same page */
229 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
232 /* the page is not in the TLB : fill it */
233 tlb_fill(addr, 1, retaddr);