tmp105: Correct handling of temperature limit checks
[qemu.git] / target / xtensa / helper.c
1 /*
2 * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the Open Source and Linux Lab nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "qemu/osdep.h"
29 #include "cpu.h"
30 #include "exec/exec-all.h"
31 #include "exec/gdbstub.h"
32 #include "exec/helper-proto.h"
33 #include "qemu/error-report.h"
34 #include "qemu/qemu-print.h"
35 #include "qemu/host-utils.h"
36
37 static struct XtensaConfigList *xtensa_cores;
38
39 static void add_translator_to_hash(GHashTable *translator,
40 const char *name,
41 const XtensaOpcodeOps *opcode)
42 {
43 if (!g_hash_table_insert(translator, (void *)name, (void *)opcode)) {
44 error_report("Multiple definitions of '%s' opcode in a single table",
45 name);
46 }
47 }
48
49 static GHashTable *hash_opcode_translators(const XtensaOpcodeTranslators *t)
50 {
51 unsigned i, j;
52 GHashTable *translator = g_hash_table_new(g_str_hash, g_str_equal);
53
54 for (i = 0; i < t->num_opcodes; ++i) {
55 if (t->opcode[i].op_flags & XTENSA_OP_NAME_ARRAY) {
56 const char * const *name = t->opcode[i].name;
57
58 for (j = 0; name[j]; ++j) {
59 add_translator_to_hash(translator,
60 (void *)name[j],
61 (void *)(t->opcode + i));
62 }
63 } else {
64 add_translator_to_hash(translator,
65 (void *)t->opcode[i].name,
66 (void *)(t->opcode + i));
67 }
68 }
69 return translator;
70 }
71
72 static XtensaOpcodeOps *
73 xtensa_find_opcode_ops(const XtensaOpcodeTranslators *t,
74 const char *name)
75 {
76 static GHashTable *translators;
77 GHashTable *translator;
78
79 if (translators == NULL) {
80 translators = g_hash_table_new(g_direct_hash, g_direct_equal);
81 }
82 translator = g_hash_table_lookup(translators, t);
83 if (translator == NULL) {
84 translator = hash_opcode_translators(t);
85 g_hash_table_insert(translators, (void *)t, translator);
86 }
87 return g_hash_table_lookup(translator, name);
88 }
89
90 static void init_libisa(XtensaConfig *config)
91 {
92 unsigned i, j;
93 unsigned opcodes;
94 unsigned formats;
95 unsigned regfiles;
96
97 config->isa = xtensa_isa_init(config->isa_internal, NULL, NULL);
98 assert(xtensa_isa_maxlength(config->isa) <= MAX_INSN_LENGTH);
99 assert(xtensa_insnbuf_size(config->isa) <= MAX_INSNBUF_LENGTH);
100 opcodes = xtensa_isa_num_opcodes(config->isa);
101 formats = xtensa_isa_num_formats(config->isa);
102 regfiles = xtensa_isa_num_regfiles(config->isa);
103 config->opcode_ops = g_new(XtensaOpcodeOps *, opcodes);
104
105 for (i = 0; i < formats; ++i) {
106 assert(xtensa_format_num_slots(config->isa, i) <= MAX_INSN_SLOTS);
107 }
108
109 for (i = 0; i < opcodes; ++i) {
110 const char *opc_name = xtensa_opcode_name(config->isa, i);
111 XtensaOpcodeOps *ops = NULL;
112
113 assert(xtensa_opcode_num_operands(config->isa, i) <= MAX_OPCODE_ARGS);
114 if (!config->opcode_translators) {
115 ops = xtensa_find_opcode_ops(&xtensa_core_opcodes, opc_name);
116 } else {
117 for (j = 0; !ops && config->opcode_translators[j]; ++j) {
118 ops = xtensa_find_opcode_ops(config->opcode_translators[j],
119 opc_name);
120 }
121 }
122 #ifdef DEBUG
123 if (ops == NULL) {
124 fprintf(stderr,
125 "opcode translator not found for %s's opcode '%s'\n",
126 config->name, opc_name);
127 }
128 #endif
129 config->opcode_ops[i] = ops;
130 }
131 config->a_regfile = xtensa_regfile_lookup(config->isa, "AR");
132
133 config->regfile = g_new(void **, regfiles);
134 for (i = 0; i < regfiles; ++i) {
135 const char *name = xtensa_regfile_name(config->isa, i);
136 int entries = xtensa_regfile_num_entries(config->isa, i);
137 int bits = xtensa_regfile_num_bits(config->isa, i);
138
139 config->regfile[i] = xtensa_get_regfile_by_name(name, entries, bits);
140 #ifdef DEBUG
141 if (config->regfile[i] == NULL) {
142 fprintf(stderr, "regfile '%s' not found for %s\n",
143 name, config->name);
144 }
145 #endif
146 }
147 xtensa_collect_sr_names(config);
148 }
149
150 static void xtensa_finalize_config(XtensaConfig *config)
151 {
152 if (config->isa_internal) {
153 init_libisa(config);
154 }
155
156 if (config->gdb_regmap.num_regs == 0 ||
157 config->gdb_regmap.num_core_regs == 0) {
158 unsigned n_regs = 0;
159 unsigned n_core_regs = 0;
160
161 xtensa_count_regs(config, &n_regs, &n_core_regs);
162 if (config->gdb_regmap.num_regs == 0) {
163 config->gdb_regmap.num_regs = n_regs;
164 }
165 if (config->gdb_regmap.num_core_regs == 0) {
166 config->gdb_regmap.num_core_regs = n_core_regs;
167 }
168 }
169 }
170
171 static void xtensa_core_class_init(ObjectClass *oc, void *data)
172 {
173 CPUClass *cc = CPU_CLASS(oc);
174 XtensaCPUClass *xcc = XTENSA_CPU_CLASS(oc);
175 XtensaConfig *config = data;
176
177 xtensa_finalize_config(config);
178 xcc->config = config;
179
180 /*
181 * Use num_core_regs to see only non-privileged registers in an unmodified
182 * gdb. Use num_regs to see all registers. gdb modification is required
183 * for that: reset bit 0 in the 'flags' field of the registers definitions
184 * in the gdb/xtensa-config.c inside gdb source tree or inside gdb overlay.
185 */
186 cc->gdb_num_core_regs = config->gdb_regmap.num_regs;
187 }
188
189 void xtensa_register_core(XtensaConfigList *node)
190 {
191 TypeInfo type = {
192 .parent = TYPE_XTENSA_CPU,
193 .class_init = xtensa_core_class_init,
194 .class_data = (void *)node->config,
195 };
196
197 node->next = xtensa_cores;
198 xtensa_cores = node;
199 type.name = g_strdup_printf(XTENSA_CPU_TYPE_NAME("%s"), node->config->name);
200 type_register(&type);
201 g_free((gpointer)type.name);
202 }
203
204 static uint32_t check_hw_breakpoints(CPUXtensaState *env)
205 {
206 unsigned i;
207
208 for (i = 0; i < env->config->ndbreak; ++i) {
209 if (env->cpu_watchpoint[i] &&
210 env->cpu_watchpoint[i]->flags & BP_WATCHPOINT_HIT) {
211 return DEBUGCAUSE_DB | (i << DEBUGCAUSE_DBNUM_SHIFT);
212 }
213 }
214 return 0;
215 }
216
217 void xtensa_breakpoint_handler(CPUState *cs)
218 {
219 XtensaCPU *cpu = XTENSA_CPU(cs);
220 CPUXtensaState *env = &cpu->env;
221
222 if (cs->watchpoint_hit) {
223 if (cs->watchpoint_hit->flags & BP_CPU) {
224 uint32_t cause;
225
226 cs->watchpoint_hit = NULL;
227 cause = check_hw_breakpoints(env);
228 if (cause) {
229 debug_exception_env(env, cause);
230 }
231 cpu_loop_exit_noexc(cs);
232 }
233 }
234 }
235
236 void xtensa_cpu_list(void)
237 {
238 XtensaConfigList *core = xtensa_cores;
239 qemu_printf("Available CPUs:\n");
240 for (; core; core = core->next) {
241 qemu_printf(" %s\n", core->config->name);
242 }
243 }
244
245 #ifdef CONFIG_USER_ONLY
246
247 bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
248 MMUAccessType access_type, int mmu_idx,
249 bool probe, uintptr_t retaddr)
250 {
251 XtensaCPU *cpu = XTENSA_CPU(cs);
252 CPUXtensaState *env = &cpu->env;
253
254 qemu_log_mask(CPU_LOG_INT,
255 "%s: rw = %d, address = 0x%08" VADDR_PRIx ", size = %d\n",
256 __func__, access_type, address, size);
257 env->sregs[EXCVADDR] = address;
258 env->sregs[EXCCAUSE] = (access_type == MMU_DATA_STORE ?
259 STORE_PROHIBITED_CAUSE : LOAD_PROHIBITED_CAUSE);
260 cs->exception_index = EXC_USER;
261 cpu_loop_exit_restore(cs, retaddr);
262 }
263
264 #else
265
266 void xtensa_cpu_do_unaligned_access(CPUState *cs,
267 vaddr addr, MMUAccessType access_type,
268 int mmu_idx, uintptr_t retaddr)
269 {
270 XtensaCPU *cpu = XTENSA_CPU(cs);
271 CPUXtensaState *env = &cpu->env;
272
273 if (xtensa_option_enabled(env->config, XTENSA_OPTION_UNALIGNED_EXCEPTION) &&
274 !xtensa_option_enabled(env->config, XTENSA_OPTION_HW_ALIGNMENT)) {
275 cpu_restore_state(CPU(cpu), retaddr, true);
276 HELPER(exception_cause_vaddr)(env,
277 env->pc, LOAD_STORE_ALIGNMENT_CAUSE,
278 addr);
279 }
280 }
281
282 bool xtensa_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
283 MMUAccessType access_type, int mmu_idx,
284 bool probe, uintptr_t retaddr)
285 {
286 XtensaCPU *cpu = XTENSA_CPU(cs);
287 CPUXtensaState *env = &cpu->env;
288 uint32_t paddr;
289 uint32_t page_size;
290 unsigned access;
291 int ret = xtensa_get_physical_addr(env, true, address, access_type,
292 mmu_idx, &paddr, &page_size, &access);
293
294 qemu_log_mask(CPU_LOG_MMU, "%s(%08" VADDR_PRIx
295 ", %d, %d) -> %08x, ret = %d\n",
296 __func__, address, access_type, mmu_idx, paddr, ret);
297
298 if (ret == 0) {
299 tlb_set_page(cs,
300 address & TARGET_PAGE_MASK,
301 paddr & TARGET_PAGE_MASK,
302 access, mmu_idx, page_size);
303 return true;
304 } else if (probe) {
305 return false;
306 } else {
307 cpu_restore_state(cs, retaddr, true);
308 HELPER(exception_cause_vaddr)(env, env->pc, ret, address);
309 }
310 }
311
312 void xtensa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
313 unsigned size, MMUAccessType access_type,
314 int mmu_idx, MemTxAttrs attrs,
315 MemTxResult response, uintptr_t retaddr)
316 {
317 XtensaCPU *cpu = XTENSA_CPU(cs);
318 CPUXtensaState *env = &cpu->env;
319
320 cpu_restore_state(cs, retaddr, true);
321 HELPER(exception_cause_vaddr)(env, env->pc,
322 access_type == MMU_INST_FETCH ?
323 INSTR_PIF_ADDR_ERROR_CAUSE :
324 LOAD_STORE_PIF_ADDR_ERROR_CAUSE,
325 addr);
326 }
327
328 void xtensa_runstall(CPUXtensaState *env, bool runstall)
329 {
330 CPUState *cpu = env_cpu(env);
331
332 env->runstall = runstall;
333 cpu->halted = runstall;
334 if (runstall) {
335 cpu_interrupt(cpu, CPU_INTERRUPT_HALT);
336 } else {
337 qemu_cpu_kick(cpu);
338 }
339 }
340 #endif