2 * LatticeMico32 helper routines.
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/>.
21 #include "qemu/host-utils.h"
23 int cpu_lm32_handle_mmu_fault(CPULM32State *env, target_ulong address, int rw,
28 address &= TARGET_PAGE_MASK;
30 if (env->flags & LM32_FLAG_IGNORE_MSB) {
31 tlb_set_page(env, address, address & 0x7fffffff, prot, mmu_idx,
34 tlb_set_page(env, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
40 hwaddr lm32_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
42 LM32CPU *cpu = LM32_CPU(cs);
44 addr &= TARGET_PAGE_MASK;
45 if (cpu->env.flags & LM32_FLAG_IGNORE_MSB) {
46 return addr & 0x7fffffff;
52 void lm32_cpu_do_interrupt(CPUState *cs)
54 LM32CPU *cpu = LM32_CPU(cs);
55 CPULM32State *env = &cpu->env;
57 qemu_log_mask(CPU_LOG_INT,
58 "exception at pc=%x type=%x\n", env->pc, env->exception_index);
60 switch (env->exception_index) {
61 case EXCP_INSN_BUS_ERROR:
62 case EXCP_DATA_BUS_ERROR:
63 case EXCP_DIVIDE_BY_ZERO:
66 /* non-debug exceptions */
67 env->regs[R_EA] = env->pc;
68 env->ie |= (env->ie & IE_IE) ? IE_EIE : 0;
70 if (env->dc & DC_RE) {
71 env->pc = env->deba + (env->exception_index * 32);
73 env->pc = env->eba + (env->exception_index * 32);
75 log_cpu_state_mask(CPU_LOG_INT, cs, 0);
79 /* debug exceptions */
80 env->regs[R_BA] = env->pc;
81 env->ie |= (env->ie & IE_IE) ? IE_BIE : 0;
83 env->pc = env->deba + (env->exception_index * 32);
84 log_cpu_state_mask(CPU_LOG_INT, cs, 0);
87 cpu_abort(env, "unhandled exception type=%d\n",
88 env->exception_index);
96 uint8_t num_interrupts;
97 uint8_t num_breakpoints;
98 uint8_t num_watchpoints;
102 static const LM32Def lm32_defs[] = {
104 .name = "lm32-basic",
106 .num_interrupts = 32,
107 .num_breakpoints = 4,
108 .num_watchpoints = 4,
109 .features = (LM32_FEATURE_SHIFT
110 | LM32_FEATURE_SIGN_EXTEND
111 | LM32_FEATURE_CYCLE_COUNT),
114 .name = "lm32-standard",
116 .num_interrupts = 32,
117 .num_breakpoints = 4,
118 .num_watchpoints = 4,
119 .features = (LM32_FEATURE_MULTIPLY
120 | LM32_FEATURE_DIVIDE
122 | LM32_FEATURE_SIGN_EXTEND
123 | LM32_FEATURE_I_CACHE
124 | LM32_FEATURE_CYCLE_COUNT),
129 .num_interrupts = 32,
130 .num_breakpoints = 4,
131 .num_watchpoints = 4,
132 .features = (LM32_FEATURE_MULTIPLY
133 | LM32_FEATURE_DIVIDE
135 | LM32_FEATURE_SIGN_EXTEND
136 | LM32_FEATURE_I_CACHE
137 | LM32_FEATURE_D_CACHE
138 | LM32_FEATURE_CYCLE_COUNT),
142 void cpu_lm32_list(FILE *f, fprintf_function cpu_fprintf)
146 cpu_fprintf(f, "Available CPUs:\n");
147 for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
148 cpu_fprintf(f, " %s\n", lm32_defs[i].name);
152 static const LM32Def *cpu_lm32_find_by_name(const char *name)
156 for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
157 if (strcasecmp(name, lm32_defs[i].name) == 0) {
158 return &lm32_defs[i];
165 static uint32_t cfg_by_def(const LM32Def *def)
169 if (def->features & LM32_FEATURE_MULTIPLY) {
173 if (def->features & LM32_FEATURE_DIVIDE) {
177 if (def->features & LM32_FEATURE_SHIFT) {
181 if (def->features & LM32_FEATURE_SIGN_EXTEND) {
185 if (def->features & LM32_FEATURE_I_CACHE) {
189 if (def->features & LM32_FEATURE_D_CACHE) {
193 if (def->features & LM32_FEATURE_CYCLE_COUNT) {
197 cfg |= (def->num_interrupts << CFG_INT_SHIFT);
198 cfg |= (def->num_breakpoints << CFG_BP_SHIFT);
199 cfg |= (def->num_watchpoints << CFG_WP_SHIFT);
200 cfg |= (def->revision << CFG_REV_SHIFT);
205 LM32CPU *cpu_lm32_init(const char *cpu_model)
211 def = cpu_lm32_find_by_name(cpu_model);
216 cpu = LM32_CPU(object_new(TYPE_LM32_CPU));
219 env->features = def->features;
220 env->num_bps = def->num_breakpoints;
221 env->num_wps = def->num_watchpoints;
222 env->cfg = cfg_by_def(def);
224 object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
229 /* Some soc ignores the MSB on the address bus. Thus creating a shadow memory
230 * area. As a general rule, 0x00000000-0x7fffffff is cached, whereas
231 * 0x80000000-0xffffffff is not cached and used to access IO devices. */
232 void cpu_lm32_set_phys_msb_ignore(CPULM32State *env, int value)
235 env->flags |= LM32_FLAG_IGNORE_MSB;
237 env->flags &= ~LM32_FLAG_IGNORE_MSB;