2 * MicroBlaze helper routines.
4 * Copyright (c) 2009 Edgar E. Iglesias <edgar.iglesias@gmail.com>
5 * Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 #include "qemu/host-utils.h"
27 #if defined(CONFIG_USER_ONLY)
29 void mb_cpu_do_interrupt(CPUState *cs)
31 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
32 CPUMBState *env = &cpu->env;
34 env->exception_index = -1;
35 env->res_addr = RES_ADDR_NONE;
36 env->regs[14] = env->sregs[SR_PC];
39 int cpu_mb_handle_mmu_fault(CPUMBState * env, target_ulong address, int rw,
42 env->exception_index = 0xaa;
43 cpu_dump_state(env, stderr, fprintf, 0);
47 #else /* !CONFIG_USER_ONLY */
49 int cpu_mb_handle_mmu_fault (CPUMBState *env, target_ulong address, int rw,
53 unsigned int mmu_available;
58 if (env->pvr.regs[0] & PVR0_USE_MMU) {
60 if ((env->pvr.regs[0] & PVR0_PVR_FULL_MASK)
61 && (env->pvr.regs[11] & PVR11_USE_MMU) != PVR11_USE_MMU) {
66 /* Translate if the MMU is available and enabled. */
67 if (mmu_available && (env->sregs[SR_MSR] & MSR_VM)) {
68 target_ulong vaddr, paddr;
69 struct microblaze_mmu_lookup lu;
71 hit = mmu_translate(&env->mmu, &lu, address, rw, mmu_idx);
73 vaddr = address & TARGET_PAGE_MASK;
74 paddr = lu.paddr + vaddr - lu.vaddr;
76 DMMU(qemu_log("MMU map mmu=%d v=%x p=%x prot=%x\n",
77 mmu_idx, vaddr, paddr, lu.prot));
78 tlb_set_page(env, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
81 env->sregs[SR_EAR] = address;
82 DMMU(qemu_log("mmu=%d miss v=%x\n", mmu_idx, address));
86 env->sregs[SR_ESR] = rw == 2 ? 17 : 16;
87 env->sregs[SR_ESR] |= (rw == 1) << 10;
90 env->sregs[SR_ESR] = rw == 2 ? 19 : 18;
91 env->sregs[SR_ESR] |= (rw == 1) << 10;
98 if (env->exception_index == EXCP_MMU) {
99 cpu_abort(env, "recursive faults\n");
103 env->exception_index = EXCP_MMU;
106 /* MMU disabled or not available. */
107 address &= TARGET_PAGE_MASK;
109 tlb_set_page(env, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
115 void mb_cpu_do_interrupt(CPUState *cs)
117 MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
118 CPUMBState *env = &cpu->env;
121 /* IMM flag cannot propagate across a branch and into the dslot. */
122 assert(!((env->iflags & D_FLAG) && (env->iflags & IMM_FLAG)));
123 assert(!(env->iflags & (DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)));
124 /* assert(env->sregs[SR_MSR] & (MSR_EE)); Only for HW exceptions. */
125 env->res_addr = RES_ADDR_NONE;
126 switch (env->exception_index) {
128 if (!(env->pvr.regs[0] & PVR0_USE_EXC_MASK)) {
129 qemu_log("Exception raised on system without exceptions!\n");
133 env->regs[17] = env->sregs[SR_PC] + 4;
134 env->sregs[SR_ESR] &= ~(1 << 12);
136 /* Exception breaks branch + dslot sequence? */
137 if (env->iflags & D_FLAG) {
138 env->sregs[SR_ESR] |= 1 << 12 ;
139 env->sregs[SR_BTR] = env->btarget;
142 /* Disable the MMU. */
143 t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
144 env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
145 env->sregs[SR_MSR] |= t;
146 /* Exception in progress. */
147 env->sregs[SR_MSR] |= MSR_EIP;
149 qemu_log_mask(CPU_LOG_INT,
150 "hw exception at pc=%x ear=%x esr=%x iflags=%x\n",
151 env->sregs[SR_PC], env->sregs[SR_EAR],
152 env->sregs[SR_ESR], env->iflags);
153 log_cpu_state_mask(CPU_LOG_INT, env, 0);
154 env->iflags &= ~(IMM_FLAG | D_FLAG);
155 env->sregs[SR_PC] = 0x20;
159 env->regs[17] = env->sregs[SR_PC];
161 env->sregs[SR_ESR] &= ~(1 << 12);
162 /* Exception breaks branch + dslot sequence? */
163 if (env->iflags & D_FLAG) {
164 D(qemu_log("D_FLAG set at exception bimm=%d\n", env->bimm));
165 env->sregs[SR_ESR] |= 1 << 12 ;
166 env->sregs[SR_BTR] = env->btarget;
168 /* Reexecute the branch. */
170 /* was the branch immprefixed?. */
172 qemu_log_mask(CPU_LOG_INT,
173 "bimm exception at pc=%x iflags=%x\n",
174 env->sregs[SR_PC], env->iflags);
176 log_cpu_state_mask(CPU_LOG_INT, env, 0);
178 } else if (env->iflags & IMM_FLAG) {
179 D(qemu_log("IMM_FLAG set at exception\n"));
183 /* Disable the MMU. */
184 t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
185 env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
186 env->sregs[SR_MSR] |= t;
187 /* Exception in progress. */
188 env->sregs[SR_MSR] |= MSR_EIP;
190 qemu_log_mask(CPU_LOG_INT,
191 "exception at pc=%x ear=%x iflags=%x\n",
192 env->sregs[SR_PC], env->sregs[SR_EAR], env->iflags);
193 log_cpu_state_mask(CPU_LOG_INT, env, 0);
194 env->iflags &= ~(IMM_FLAG | D_FLAG);
195 env->sregs[SR_PC] = 0x20;
199 assert(!(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)));
200 assert(env->sregs[SR_MSR] & MSR_IE);
201 assert(!(env->iflags & D_FLAG));
203 t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
206 #include "disas/disas.h"
208 /* Useful instrumentation when debugging interrupt issues in either
209 the models or in sw. */
213 sym = lookup_symbol(env->sregs[SR_PC]);
215 && (!strcmp("netif_rx", sym)
216 || !strcmp("process_backlog", sym))) {
219 "interrupt at pc=%x msr=%x %x iflags=%x sym=%s\n",
220 env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags,
223 log_cpu_state(env, 0);
227 qemu_log_mask(CPU_LOG_INT,
228 "interrupt at pc=%x msr=%x %x iflags=%x\n",
229 env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);
231 env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM \
233 env->sregs[SR_MSR] |= t;
235 env->regs[14] = env->sregs[SR_PC];
236 env->sregs[SR_PC] = 0x10;
237 //log_cpu_state_mask(CPU_LOG_INT, env, 0);
242 assert(!(env->iflags & IMM_FLAG));
243 assert(!(env->iflags & D_FLAG));
244 t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
245 qemu_log_mask(CPU_LOG_INT,
246 "break at pc=%x msr=%x %x iflags=%x\n",
247 env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);
248 log_cpu_state_mask(CPU_LOG_INT, env, 0);
249 env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
250 env->sregs[SR_MSR] |= t;
251 env->sregs[SR_MSR] |= MSR_BIP;
252 if (env->exception_index == EXCP_HW_BREAK) {
253 env->regs[16] = env->sregs[SR_PC];
254 env->sregs[SR_MSR] |= MSR_BIP;
255 env->sregs[SR_PC] = 0x18;
257 env->sregs[SR_PC] = env->btarget;
260 cpu_abort(env, "unhandled exception type=%d\n",
261 env->exception_index);
266 hwaddr cpu_get_phys_page_debug(CPUMBState * env, target_ulong addr)
268 target_ulong vaddr, paddr = 0;
269 struct microblaze_mmu_lookup lu;
272 if (env->sregs[SR_MSR] & MSR_VM) {
273 hit = mmu_translate(&env->mmu, &lu, addr, 0, 0);
275 vaddr = addr & TARGET_PAGE_MASK;
276 paddr = lu.paddr + vaddr - lu.vaddr;
278 paddr = 0; /* ???. */
280 paddr = addr & TARGET_PAGE_MASK;