diff options
Diffstat (limited to 'target-lm32/helper.c')
| -rw-r--r-- | target-lm32/helper.c | 218 |
1 files changed, 94 insertions, 124 deletions
diff --git a/target-lm32/helper.c b/target-lm32/helper.c index 15bc61554d..eecb9f612e 100644 --- a/target-lm32/helper.c +++ b/target-lm32/helper.c @@ -49,6 +49,96 @@ hwaddr lm32_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) } } +void lm32_breakpoint_insert(CPULM32State *env, int idx, target_ulong address) +{ + cpu_breakpoint_insert(env, address, BP_CPU, &env->cpu_breakpoint[idx]); +} + +void lm32_breakpoint_remove(CPULM32State *env, int idx) +{ + if (!env->cpu_breakpoint[idx]) { + return; + } + + cpu_breakpoint_remove_by_ref(env, env->cpu_breakpoint[idx]); + env->cpu_breakpoint[idx] = NULL; +} + +void lm32_watchpoint_insert(CPULM32State *env, int idx, target_ulong address, + lm32_wp_t wp_type) +{ + int flags = 0; + + switch (wp_type) { + case LM32_WP_DISABLED: + /* nothing to to */ + break; + case LM32_WP_READ: + flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_READ; + break; + case LM32_WP_WRITE: + flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_WRITE; + break; + case LM32_WP_READ_WRITE: + flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_ACCESS; + break; + } + + if (flags != 0) { + cpu_watchpoint_insert(env, address, 1, flags, + &env->cpu_watchpoint[idx]); + } +} + +void lm32_watchpoint_remove(CPULM32State *env, int idx) +{ + if (!env->cpu_watchpoint[idx]) { + return; + } + + cpu_watchpoint_remove_by_ref(env, env->cpu_watchpoint[idx]); + env->cpu_watchpoint[idx] = NULL; +} + +static bool check_watchpoints(CPULM32State *env) +{ + LM32CPU *cpu = lm32_env_get_cpu(env); + int i; + + for (i = 0; i < cpu->num_watchpoints; i++) { + if (env->cpu_watchpoint[i] && + env->cpu_watchpoint[i]->flags & BP_WATCHPOINT_HIT) { + return true; + } + } + return false; +} + +void lm32_debug_excp_handler(CPULM32State *env) +{ + CPUBreakpoint *bp; + + if (env->watchpoint_hit) { + if (env->watchpoint_hit->flags & BP_CPU) { + env->watchpoint_hit = NULL; + if (check_watchpoints(env)) { + raise_exception(env, EXCP_WATCHPOINT); + } else { + cpu_resume_from_signal(env, NULL); + } + } + } else { + QTAILQ_FOREACH(bp, &env->breakpoints, entry) { + if (bp->pc == env->pc) { + if (bp->flags & BP_CPU) { + raise_exception(env, EXCP_BREAKPOINT); + } + break; + } + } + } +} + void lm32_cpu_do_interrupt(CPUState *cs) { LM32CPU *cpu = LM32_CPU(cs); @@ -90,136 +180,16 @@ void lm32_cpu_do_interrupt(CPUState *cs) } } -typedef struct { - const char *name; - uint32_t revision; - uint8_t num_interrupts; - uint8_t num_breakpoints; - uint8_t num_watchpoints; - uint32_t features; -} LM32Def; - -static const LM32Def lm32_defs[] = { - { - .name = "lm32-basic", - .revision = 3, - .num_interrupts = 32, - .num_breakpoints = 4, - .num_watchpoints = 4, - .features = (LM32_FEATURE_SHIFT - | LM32_FEATURE_SIGN_EXTEND - | LM32_FEATURE_CYCLE_COUNT), - }, - { - .name = "lm32-standard", - .revision = 3, - .num_interrupts = 32, - .num_breakpoints = 4, - .num_watchpoints = 4, - .features = (LM32_FEATURE_MULTIPLY - | LM32_FEATURE_DIVIDE - | LM32_FEATURE_SHIFT - | LM32_FEATURE_SIGN_EXTEND - | LM32_FEATURE_I_CACHE - | LM32_FEATURE_CYCLE_COUNT), - }, - { - .name = "lm32-full", - .revision = 3, - .num_interrupts = 32, - .num_breakpoints = 4, - .num_watchpoints = 4, - .features = (LM32_FEATURE_MULTIPLY - | LM32_FEATURE_DIVIDE - | LM32_FEATURE_SHIFT - | LM32_FEATURE_SIGN_EXTEND - | LM32_FEATURE_I_CACHE - | LM32_FEATURE_D_CACHE - | LM32_FEATURE_CYCLE_COUNT), - } -}; - -void cpu_lm32_list(FILE *f, fprintf_function cpu_fprintf) -{ - int i; - - cpu_fprintf(f, "Available CPUs:\n"); - for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) { - cpu_fprintf(f, " %s\n", lm32_defs[i].name); - } -} - -static const LM32Def *cpu_lm32_find_by_name(const char *name) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(lm32_defs); i++) { - if (strcasecmp(name, lm32_defs[i].name) == 0) { - return &lm32_defs[i]; - } - } - - return NULL; -} - -static uint32_t cfg_by_def(const LM32Def *def) -{ - uint32_t cfg = 0; - - if (def->features & LM32_FEATURE_MULTIPLY) { - cfg |= CFG_M; - } - - if (def->features & LM32_FEATURE_DIVIDE) { - cfg |= CFG_D; - } - - if (def->features & LM32_FEATURE_SHIFT) { - cfg |= CFG_S; - } - - if (def->features & LM32_FEATURE_SIGN_EXTEND) { - cfg |= CFG_X; - } - - if (def->features & LM32_FEATURE_I_CACHE) { - cfg |= CFG_IC; - } - - if (def->features & LM32_FEATURE_D_CACHE) { - cfg |= CFG_DC; - } - - if (def->features & LM32_FEATURE_CYCLE_COUNT) { - cfg |= CFG_CC; - } - - cfg |= (def->num_interrupts << CFG_INT_SHIFT); - cfg |= (def->num_breakpoints << CFG_BP_SHIFT); - cfg |= (def->num_watchpoints << CFG_WP_SHIFT); - cfg |= (def->revision << CFG_REV_SHIFT); - - return cfg; -} - LM32CPU *cpu_lm32_init(const char *cpu_model) { LM32CPU *cpu; - CPULM32State *env; - const LM32Def *def; + ObjectClass *oc; - def = cpu_lm32_find_by_name(cpu_model); - if (!def) { + oc = cpu_class_by_name(TYPE_LM32_CPU, cpu_model); + if (oc == NULL) { return NULL; } - - cpu = LM32_CPU(object_new(TYPE_LM32_CPU)); - env = &cpu->env; - - env->features = def->features; - env->num_bps = def->num_breakpoints; - env->num_wps = def->num_watchpoints; - env->cfg = cfg_by_def(def); + cpu = LM32_CPU(object_new(object_class_get_name(oc))); object_property_set_bool(OBJECT(cpu), true, "realized", NULL); |