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 cpu_get_phys_page_debug(CPULM32State *env, target_ulong addr)
42 return addr & TARGET_PAGE_MASK;
45 void do_interrupt(CPULM32State *env)
47 qemu_log_mask(CPU_LOG_INT,
48 "exception at pc=%x type=%x\n", env->pc, env->exception_index);
50 switch (env->exception_index) {
51 case EXCP_INSN_BUS_ERROR:
52 case EXCP_DATA_BUS_ERROR:
53 case EXCP_DIVIDE_BY_ZERO:
56 /* non-debug exceptions */
57 env->regs[R_EA] = env->pc;
58 env->ie |= (env->ie & IE_IE) ? IE_EIE : 0;
60 if (env->dc & DC_RE) {
61 env->pc = env->deba + (env->exception_index * 32);
63 env->pc = env->eba + (env->exception_index * 32);
65 log_cpu_state_mask(CPU_LOG_INT, env, 0);
69 /* debug exceptions */
70 env->regs[R_BA] = env->pc;
71 env->ie |= (env->ie & IE_IE) ? IE_BIE : 0;
73 env->pc = env->deba + (env->exception_index * 32);
74 log_cpu_state_mask(CPU_LOG_INT, env, 0);
77 cpu_abort(env, "unhandled exception type=%d\n",
78 env->exception_index);
86 uint8_t num_interrupts;
87 uint8_t num_breakpoints;
88 uint8_t num_watchpoints;
92 static const LM32Def lm32_defs[] = {
99 .features = (LM32_FEATURE_SHIFT
100 | LM32_FEATURE_SIGN_EXTEND
101 | LM32_FEATURE_CYCLE_COUNT),
104 .name = "lm32-standard",
106 .num_interrupts = 32,
107 .num_breakpoints = 4,
108 .num_watchpoints = 4,
109 .features = (LM32_FEATURE_MULTIPLY
110 | LM32_FEATURE_DIVIDE
112 | LM32_FEATURE_SIGN_EXTEND
113 | LM32_FEATURE_I_CACHE
114 | LM32_FEATURE_CYCLE_COUNT),
119 .num_interrupts = 32,
120 .num_breakpoints = 4,
121 .num_watchpoints = 4,
122 .features = (LM32_FEATURE_MULTIPLY
123 | LM32_FEATURE_DIVIDE
125 | LM32_FEATURE_SIGN_EXTEND
126 | LM32_FEATURE_I_CACHE
127 | LM32_FEATURE_D_CACHE
128 | LM32_FEATURE_CYCLE_COUNT),
132 void cpu_lm32_list(FILE *f, fprintf_function cpu_fprintf)
136 cpu_fprintf(f, "Available CPUs:\n");
137 for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
138 cpu_fprintf(f, " %s\n", lm32_defs[i].name);
142 static const LM32Def *cpu_lm32_find_by_name(const char *name)
146 for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) {
147 if (strcasecmp(name, lm32_defs[i].name) == 0) {
148 return &lm32_defs[i];
155 static uint32_t cfg_by_def(const LM32Def *def)
159 if (def->features & LM32_FEATURE_MULTIPLY) {
163 if (def->features & LM32_FEATURE_DIVIDE) {
167 if (def->features & LM32_FEATURE_SHIFT) {
171 if (def->features & LM32_FEATURE_SIGN_EXTEND) {
175 if (def->features & LM32_FEATURE_I_CACHE) {
179 if (def->features & LM32_FEATURE_D_CACHE) {
183 if (def->features & LM32_FEATURE_CYCLE_COUNT) {
187 cfg |= (def->num_interrupts << CFG_INT_SHIFT);
188 cfg |= (def->num_breakpoints << CFG_BP_SHIFT);
189 cfg |= (def->num_watchpoints << CFG_WP_SHIFT);
190 cfg |= (def->revision << CFG_REV_SHIFT);
195 LM32CPU *cpu_lm32_init(const char *cpu_model)
201 def = cpu_lm32_find_by_name(cpu_model);
206 cpu = LM32_CPU(object_new(TYPE_LM32_CPU));
209 env->features = def->features;
210 env->num_bps = def->num_breakpoints;
211 env->num_wps = def->num_watchpoints;
212 env->cfg = cfg_by_def(def);
214 object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
219 /* Some soc ignores the MSB on the address bus. Thus creating a shadow memory
220 * area. As a general rule, 0x00000000-0x7fffffff is cached, whereas
221 * 0x80000000-0xffffffff is not cached and used to access IO devices. */
222 void cpu_lm32_set_phys_msb_ignore(CPULM32State *env, int value)
225 env->flags |= LM32_FLAG_IGNORE_MSB;
227 env->flags &= ~LM32_FLAG_IGNORE_MSB;