2 * PowerPC memory access emulation helpers for QEMU.
4 * Copyright (c) 2003-2007 Jocelyn Mayer
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, see <http://www.gnu.org/licenses/>.
20 #include "host-utils.h"
23 #include "helper_regs.h"
25 #if !defined(CONFIG_USER_ONLY)
26 #include "exec/softmmu_exec.h"
27 #endif /* !defined(CONFIG_USER_ONLY) */
31 /*****************************************************************************/
32 /* Memory load and stores */
34 static inline target_ulong addr_add(CPUPPCState *env, target_ulong addr,
37 #if defined(TARGET_PPC64)
38 if (!msr_is_64bit(env, env->msr)) {
39 return (uint32_t)(addr + arg);
47 void helper_lmw(CPUPPCState *env, target_ulong addr, uint32_t reg)
49 for (; reg < 32; reg++) {
51 env->gpr[reg] = bswap32(cpu_ldl_data(env, addr));
53 env->gpr[reg] = cpu_ldl_data(env, addr);
55 addr = addr_add(env, addr, 4);
59 void helper_stmw(CPUPPCState *env, target_ulong addr, uint32_t reg)
61 for (; reg < 32; reg++) {
63 cpu_stl_data(env, addr, bswap32((uint32_t)env->gpr[reg]));
65 cpu_stl_data(env, addr, (uint32_t)env->gpr[reg]);
67 addr = addr_add(env, addr, 4);
71 void helper_lsw(CPUPPCState *env, target_ulong addr, uint32_t nb, uint32_t reg)
75 for (; nb > 3; nb -= 4) {
76 env->gpr[reg] = cpu_ldl_data(env, addr);
78 addr = addr_add(env, addr, 4);
80 if (unlikely(nb > 0)) {
82 for (sh = 24; nb > 0; nb--, sh -= 8) {
83 env->gpr[reg] |= cpu_ldub_data(env, addr) << sh;
84 addr = addr_add(env, addr, 1);
88 /* PPC32 specification says we must generate an exception if
89 * rA is in the range of registers to be loaded.
90 * In an other hand, IBM says this is valid, but rA won't be loaded.
91 * For now, I'll follow the spec...
93 void helper_lswx(CPUPPCState *env, target_ulong addr, uint32_t reg,
94 uint32_t ra, uint32_t rb)
96 if (likely(xer_bc != 0)) {
97 if (unlikely((ra != 0 && reg < ra && (reg + xer_bc) > ra) ||
98 (reg < rb && (reg + xer_bc) > rb))) {
99 helper_raise_exception_err(env, POWERPC_EXCP_PROGRAM,
101 POWERPC_EXCP_INVAL_LSWX);
103 helper_lsw(env, addr, xer_bc, reg);
108 void helper_stsw(CPUPPCState *env, target_ulong addr, uint32_t nb,
113 for (; nb > 3; nb -= 4) {
114 cpu_stl_data(env, addr, env->gpr[reg]);
115 reg = (reg + 1) % 32;
116 addr = addr_add(env, addr, 4);
118 if (unlikely(nb > 0)) {
119 for (sh = 24; nb > 0; nb--, sh -= 8) {
120 cpu_stb_data(env, addr, (env->gpr[reg] >> sh) & 0xFF);
121 addr = addr_add(env, addr, 1);
126 static void do_dcbz(CPUPPCState *env, target_ulong addr, int dcache_line_size)
130 addr &= ~(dcache_line_size - 1);
131 for (i = 0; i < dcache_line_size; i += 4) {
132 cpu_stl_data(env, addr + i, 0);
134 if (env->reserve_addr == addr) {
135 env->reserve_addr = (target_ulong)-1ULL;
139 void helper_dcbz(CPUPPCState *env, target_ulong addr)
141 do_dcbz(env, addr, env->dcache_line_size);
144 void helper_dcbz_970(CPUPPCState *env, target_ulong addr)
146 if (((env->spr[SPR_970_HID5] >> 7) & 0x3) == 1) {
147 do_dcbz(env, addr, 32);
149 do_dcbz(env, addr, env->dcache_line_size);
153 void helper_icbi(CPUPPCState *env, target_ulong addr)
155 addr &= ~(env->dcache_line_size - 1);
156 /* Invalidate one cache line :
157 * PowerPC specification says this is to be treated like a load
158 * (not a fetch) by the MMU. To be sure it will be so,
159 * do the load "by hand".
161 cpu_ldl_data(env, addr);
164 /* XXX: to be tested */
165 target_ulong helper_lscbx(CPUPPCState *env, target_ulong addr, uint32_t reg,
166 uint32_t ra, uint32_t rb)
171 for (i = 0; i < xer_bc; i++) {
172 c = cpu_ldub_data(env, addr);
173 addr = addr_add(env, addr, 1);
174 /* ra (if not 0) and rb are never modified */
175 if (likely(reg != rb && (ra == 0 || reg != ra))) {
176 env->gpr[reg] = (env->gpr[reg] & ~(0xFF << d)) | (c << d);
178 if (unlikely(c == xer_cmp)) {
181 if (likely(d != 0)) {
192 /*****************************************************************************/
193 /* Altivec extension helpers */
194 #if defined(HOST_WORDS_BIGENDIAN)
202 #define LVE(name, access, swap, element) \
203 void helper_##name(CPUPPCState *env, ppc_avr_t *r, \
206 size_t n_elems = ARRAY_SIZE(r->element); \
207 int adjust = HI_IDX*(n_elems - 1); \
208 int sh = sizeof(r->element[0]) >> 1; \
209 int index = (addr & 0xf) >> sh; \
212 r->element[LO_IDX ? index : (adjust - index)] = \
213 swap(access(env, addr)); \
215 r->element[LO_IDX ? index : (adjust - index)] = \
220 LVE(lvebx, cpu_ldub_data, I, u8)
221 LVE(lvehx, cpu_lduw_data, bswap16, u16)
222 LVE(lvewx, cpu_ldl_data, bswap32, u32)
226 #define STVE(name, access, swap, element) \
227 void helper_##name(CPUPPCState *env, ppc_avr_t *r, \
230 size_t n_elems = ARRAY_SIZE(r->element); \
231 int adjust = HI_IDX * (n_elems - 1); \
232 int sh = sizeof(r->element[0]) >> 1; \
233 int index = (addr & 0xf) >> sh; \
236 access(env, addr, swap(r->element[LO_IDX ? index : \
237 (adjust - index)])); \
239 access(env, addr, r->element[LO_IDX ? index : \
240 (adjust - index)]); \
244 STVE(stvebx, cpu_stb_data, I, u8)
245 STVE(stvehx, cpu_stw_data, bswap16, u16)
246 STVE(stvewx, cpu_stl_data, bswap32, u32)
253 /*****************************************************************************/
254 /* Softmmu support */
255 #if !defined(CONFIG_USER_ONLY)
257 #define MMUSUFFIX _mmu
260 #include "exec/softmmu_template.h"
263 #include "exec/softmmu_template.h"
266 #include "exec/softmmu_template.h"
269 #include "exec/softmmu_template.h"
271 /* try to fill the TLB and return an exception if error. If retaddr is
272 NULL, it means that the function was called in C code (i.e. not
273 from generated code or from helper.c) */
274 /* XXX: fix it to restore all registers */
275 void tlb_fill(CPUPPCState *env, target_ulong addr, int is_write, int mmu_idx,
280 ret = cpu_ppc_handle_mmu_fault(env, addr, is_write, mmu_idx);
281 if (unlikely(ret != 0)) {
282 if (likely(retaddr)) {
283 /* now we have a real cpu fault */
284 cpu_restore_state(env, retaddr);
286 helper_raise_exception_err(env, env->exception_index, env->error_code);
289 #endif /* !CONFIG_USER_ONLY */