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](io_mem_opaque[index], physaddr);
60 #ifdef TARGET_WORDS_BIGENDIAN
61 res = (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr) << 32;
62 res |= io_mem_read[index][2](io_mem_opaque[index], physaddr + 4);
64 res = io_mem_read[index][2](io_mem_opaque[index], physaddr);
65 res |= (uint64_t)io_mem_read[index][2](io_mem_opaque[index], physaddr + 4) << 32;
67 #endif /* SHIFT > 2 */
71 static inline void glue(io_write, SUFFIX)(unsigned long physaddr,
73 unsigned long tlb_addr,
78 index = (tlb_addr >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
79 env->mem_write_vaddr = tlb_addr;
80 env->mem_write_pc = (unsigned long)retaddr;
82 io_mem_write[index][SHIFT](io_mem_opaque[index], physaddr, val);
84 #ifdef TARGET_WORDS_BIGENDIAN
85 io_mem_write[index][2](io_mem_opaque[index], physaddr, val >> 32);
86 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val);
88 io_mem_write[index][2](io_mem_opaque[index], physaddr, val);
89 io_mem_write[index][2](io_mem_opaque[index], physaddr + 4, val >> 32);
91 #endif /* SHIFT > 2 */
94 /* handle all cases except unaligned access which span two pages */
95 DATA_TYPE REGPARM(1) glue(glue(__ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
100 unsigned long physaddr, tlb_addr;
103 /* test if there is match for unaligned or IO access */
104 /* XXX: could done more in memory macro in a non portable way */
105 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
107 tlb_addr = env->tlb_read[is_user][index].address;
108 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
109 physaddr = addr + env->tlb_read[is_user][index].addend;
110 if (tlb_addr & ~TARGET_PAGE_MASK) {
112 if ((addr & (DATA_SIZE - 1)) != 0)
113 goto do_unaligned_access;
114 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
115 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
116 /* slow unaligned access (it spans two pages or IO) */
119 res = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr,
122 /* unaligned access in the same page */
123 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
126 /* the page is not in the TLB : fill it */
128 tlb_fill(addr, 0, is_user, retaddr);
134 /* handle all unaligned cases */
135 static DATA_TYPE glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(unsigned long addr,
139 DATA_TYPE res, res1, res2;
141 unsigned long physaddr, tlb_addr, addr1, addr2;
143 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
145 tlb_addr = env->tlb_read[is_user][index].address;
146 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
147 physaddr = addr + env->tlb_read[is_user][index].addend;
148 if (tlb_addr & ~TARGET_PAGE_MASK) {
150 if ((addr & (DATA_SIZE - 1)) != 0)
151 goto do_unaligned_access;
152 res = glue(io_read, SUFFIX)(physaddr, tlb_addr);
153 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
155 /* slow unaligned access (it spans two pages) */
156 addr1 = addr & ~(DATA_SIZE - 1);
157 addr2 = addr1 + DATA_SIZE;
158 res1 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr1,
160 res2 = glue(glue(slow_ld, SUFFIX), MMUSUFFIX)(addr2,
162 shift = (addr & (DATA_SIZE - 1)) * 8;
163 #ifdef TARGET_WORDS_BIGENDIAN
164 res = (res1 << shift) | (res2 >> ((DATA_SIZE * 8) - shift));
166 res = (res1 >> shift) | (res2 << ((DATA_SIZE * 8) - shift));
168 res = (DATA_TYPE)res;
170 /* unaligned/aligned access in the same page */
171 res = glue(glue(ld, USUFFIX), _raw)((uint8_t *)physaddr);
174 /* the page is not in the TLB : fill it */
175 tlb_fill(addr, 0, is_user, retaddr);
182 void REGPARM(2) glue(glue(__st, SUFFIX), MMUSUFFIX)(unsigned long addr,
186 unsigned long physaddr, tlb_addr;
190 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
192 tlb_addr = env->tlb_write[is_user][index].address;
193 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
194 physaddr = addr + env->tlb_write[is_user][index].addend;
195 if (tlb_addr & ~TARGET_PAGE_MASK) {
197 if ((addr & (DATA_SIZE - 1)) != 0)
198 goto do_unaligned_access;
200 glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
201 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
204 glue(glue(slow_st, SUFFIX), MMUSUFFIX)(addr, val,
207 /* aligned/unaligned access in the same page */
208 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
211 /* the page is not in the TLB : fill it */
213 tlb_fill(addr, 1, is_user, retaddr);
218 /* handles all unaligned cases */
219 static void glue(glue(slow_st, SUFFIX), MMUSUFFIX)(unsigned long addr,
224 unsigned long physaddr, tlb_addr;
227 index = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
229 tlb_addr = env->tlb_write[is_user][index].address;
230 if ((addr & TARGET_PAGE_MASK) == (tlb_addr & (TARGET_PAGE_MASK | TLB_INVALID_MASK))) {
231 physaddr = addr + env->tlb_write[is_user][index].addend;
232 if (tlb_addr & ~TARGET_PAGE_MASK) {
234 if ((addr & (DATA_SIZE - 1)) != 0)
235 goto do_unaligned_access;
236 glue(io_write, SUFFIX)(physaddr, val, tlb_addr, retaddr);
237 } else if (((addr & 0xfff) + DATA_SIZE - 1) >= TARGET_PAGE_SIZE) {
239 /* XXX: not efficient, but simple */
240 for(i = 0;i < DATA_SIZE; i++) {
241 #ifdef TARGET_WORDS_BIGENDIAN
242 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (((DATA_SIZE - 1) * 8) - (i * 8)),
245 glue(slow_stb, MMUSUFFIX)(addr + i, val >> (i * 8),
250 /* aligned/unaligned access in the same page */
251 glue(glue(st, SUFFIX), _raw)((uint8_t *)physaddr, val);
254 /* the page is not in the TLB : fill it */
255 tlb_fill(addr, 1, is_user, retaddr);