From 32a2c70d3e05bf037b655ff80edcdc2637133650 Mon Sep 17 00:00:00 2001 From: oharboe Date: Thu, 27 Aug 2009 06:50:36 +0000 Subject: [PATCH] refactor arm simulator to allow arm11 code to use it as well - no observable changes otherwise. git-svn-id: svn://svn.berlios.de/openocd/trunk@2640 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/arm_simulator.c | 177 +++++++++++++++++++++++++++---------- src/target/arm_simulator.h | 19 +++- 2 files changed, 147 insertions(+), 49 deletions(-) diff --git a/src/target/arm_simulator.c b/src/target/arm_simulator.c index c087b772..7c610a5b 100644 --- a/src/target/arm_simulator.c +++ b/src/target/arm_simulator.c @@ -122,17 +122,18 @@ uint32_t arm_shift(uint8_t shift, uint32_t Rm, uint32_t shift_amount, uint8_t *c return return_value; } -uint32_t arm_shifter_operand(armv4_5_common_t *armv4_5, int variant, union arm_shifter_operand shifter_operand, uint8_t *shifter_carry_out) + +uint32_t arm_shifter_operand(struct arm_sim_interface *sim, int variant, union arm_shifter_operand shifter_operand, uint8_t *shifter_carry_out) { uint32_t return_value; int instruction_size; - if (armv4_5->core_state == ARMV4_5_STATE_ARM) + if (sim->get_state(sim) == ARMV4_5_STATE_ARM) instruction_size = 4; else instruction_size = 2; - *shifter_carry_out = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 29, 1); + *shifter_carry_out = sim->get_cpsr(sim, 29, 1); if (variant == 0) /* 32-bit immediate */ { @@ -140,7 +141,7 @@ uint32_t arm_shifter_operand(armv4_5_common_t *armv4_5, int variant, union arm_s } else if (variant == 1) /* immediate shift */ { - uint32_t Rm = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, shifter_operand.immediate_shift.Rm).value, 0, 32); + uint32_t Rm = sim->get_reg_mode(sim, shifter_operand.immediate_shift.Rm); /* adjust RM in case the PC is being read */ if (shifter_operand.immediate_shift.Rm == 15) @@ -150,8 +151,8 @@ uint32_t arm_shifter_operand(armv4_5_common_t *armv4_5, int variant, union arm_s } else if (variant == 2) /* register shift */ { - uint32_t Rm = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, shifter_operand.register_shift.Rm).value, 0, 32); - uint32_t Rs = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, shifter_operand.register_shift.Rs).value, 0, 32); + uint32_t Rm = sim->get_reg_mode(sim, shifter_operand.register_shift.Rm); + uint32_t Rs = sim->get_reg_mode(sim, shifter_operand.register_shift.Rs); /* adjust RM in case the PC is being read */ if (shifter_operand.register_shift.Rm == 15) @@ -267,15 +268,14 @@ int thumb_pass_branch_condition(uint32_t cpsr, uint16_t opcode) * if the dry_run_pc argument is provided, no state is changed, * but the new pc is stored in the variable pointed at by the argument */ -int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) +int arm_simulate_step_core(target_t *target, uint32_t *dry_run_pc, struct arm_sim_interface *sim) { - armv4_5_common_t *armv4_5 = target->arch_info; - uint32_t current_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); + uint32_t current_pc = sim->get_reg(sim, 15); arm_instruction_t instruction; int instruction_size; int retval = ERROR_OK; - if (armv4_5->core_state == ARMV4_5_STATE_ARM) + if (sim->get_state(sim) == ARMV4_5_STATE_ARM) { uint32_t opcode; @@ -291,7 +291,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) instruction_size = 4; /* check condition code (for all instructions) */ - if (!pass_condition(buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32), opcode)) + if (!pass_condition(sim->get_cpsr(sim, 0, 32), opcode)) { if (dry_run_pc) { @@ -299,7 +299,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, current_pc + instruction_size); + sim->set_reg(sim, 15, current_pc + instruction_size); } return ERROR_OK; @@ -320,7 +320,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) instruction_size = 2; /* check condition code (only for branch instructions) */ - if ((!thumb_pass_branch_condition(buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32), opcode)) && + if ((!thumb_pass_branch_condition(sim->get_cpsr(sim, 0, 32), opcode)) && (instruction.type == ARM_B)) { if (dry_run_pc) @@ -329,7 +329,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, current_pc + instruction_size); + sim->set_reg(sim, 15, current_pc + instruction_size); } return ERROR_OK; @@ -349,7 +349,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - target = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.b_bl_bx_blx.reg_operand).value, 0, 32); + target = sim->get_reg_mode(sim, instruction.info.b_bl_bx_blx.reg_operand); if (instruction.info.b_bl_bx_blx.reg_operand == 15) { target += 2 * instruction_size; @@ -365,40 +365,40 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) { if (instruction.type == ARM_B) { - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, target); + sim->set_reg(sim, 15, target); } else if (instruction.type == ARM_BL) { - uint32_t old_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 14).value, 0, 32, old_pc + 4); - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, target); + uint32_t old_pc = sim->get_reg(sim, 15); + sim->set_reg_mode(sim, 14, old_pc + 4); + sim->set_reg(sim, 15, target); } else if (instruction.type == ARM_BX) { if (target & 0x1) { - armv4_5->core_state = ARMV4_5_STATE_THUMB; + sim->set_state(sim, ARMV4_5_STATE_THUMB); } else { - armv4_5->core_state = ARMV4_5_STATE_ARM; + sim->set_state(sim, ARMV4_5_STATE_ARM); } - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, target & 0xfffffffe); + sim->set_reg(sim, 15, target & 0xfffffffe); } else if (instruction.type == ARM_BLX) { - uint32_t old_pc = buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32); - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 14).value, 0, 32, old_pc + 4); + uint32_t old_pc = sim->get_reg(sim, 15); + sim->set_reg_mode(sim, 14, old_pc + 4); if (target & 0x1) { - armv4_5->core_state = ARMV4_5_STATE_THUMB; + sim->set_state(sim, ARMV4_5_STATE_THUMB); } else { - armv4_5->core_state = ARMV4_5_STATE_ARM; + sim->set_state(sim, ARMV4_5_STATE_ARM); } - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, target & 0xfffffffe); + sim->set_reg(sim, 15, target & 0xfffffffe); } return ERROR_OK; @@ -409,17 +409,17 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) || ((instruction.type >= ARM_ORR) && (instruction.type <= ARM_MVN))) { uint32_t Rd, Rn, shifter_operand; - uint8_t C = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 29, 1); + uint8_t C = sim->get_cpsr(sim, 29, 1); uint8_t carry_out; Rd = 0x0; /* ARM_MOV and ARM_MVN does not use Rn */ if ((instruction.type != ARM_MOV) && (instruction.type != ARM_MVN)) - Rn = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.data_proc.Rn).value, 0, 32); + Rn = sim->get_reg_mode(sim, instruction.info.data_proc.Rn); else Rn = 0; - shifter_operand = arm_shifter_operand(armv4_5, instruction.info.data_proc.variant, instruction.info.data_proc.shifter_operand, &carry_out); + shifter_operand = arm_shifter_operand(sim, instruction.info.data_proc.variant, instruction.info.data_proc.shifter_operand, &carry_out); /* adjust Rn in case the PC is being read */ if (instruction.info.data_proc.Rn == 15) @@ -468,7 +468,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.data_proc.Rd).value, 0, 32, Rd); + sim->set_reg_mode(sim, instruction.info.data_proc.Rd, Rd); LOG_WARNING("no updating of flags yet"); if (instruction.info.data_proc.Rd == 15) @@ -492,7 +492,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) else if ((instruction.type >= ARM_LDR) && (instruction.type <= ARM_LDRSH)) { uint32_t load_address = 0, modified_address = 0, load_value; - uint32_t Rn = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store.Rn).value, 0, 32); + uint32_t Rn = sim->get_reg_mode(sim, instruction.info.load_store.Rn); /* adjust Rn in case the PC is being read */ if (instruction.info.load_store.Rn == 15) @@ -508,10 +508,10 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) else if (instruction.info.load_store.offset_mode == 1) { uint32_t offset; - uint32_t Rm = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store.offset.reg.Rm).value, 0, 32); + uint32_t Rm = sim->get_reg_mode(sim, instruction.info.load_store.offset.reg.Rm); uint8_t shift = instruction.info.load_store.offset.reg.shift; uint8_t shift_imm = instruction.info.load_store.offset.reg.shift_imm; - uint8_t carry = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 29, 1); + uint8_t carry = sim->get_cpsr(sim, 29, 1); offset = arm_shift(shift, Rm, shift_imm, &carry); @@ -572,9 +572,9 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) if ((instruction.info.load_store.index_mode == 1) || (instruction.info.load_store.index_mode == 2)) { - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store.Rn).value, 0, 32, modified_address); + sim->set_reg_mode(sim, instruction.info.load_store.Rn, modified_address); } - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store.Rd).value, 0, 32, load_value); + sim->set_reg_mode(sim, instruction.info.load_store.Rd, load_value); if (instruction.info.load_store.Rd == 15) return ERROR_OK; @@ -584,7 +584,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) else if (instruction.type == ARM_LDM) { int i; - uint32_t Rn = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store_multiple.Rn).value, 0, 32); + uint32_t Rn = sim->get_reg_mode(sim, instruction.info.load_store_multiple.Rn); uint32_t load_values[16]; int bits_set = 0; @@ -632,7 +632,7 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - enum armv4_5_mode mode = armv4_5->core_mode; + enum armv4_5_mode mode = sim->get_mode(sim); int update_cpsr = 0; if (instruction.info.load_store_multiple.S) @@ -647,19 +647,19 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) { if (instruction.info.load_store_multiple.register_list & (1 << i)) { - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, i).value, 0, 32, load_values[i]); + sim->set_reg_mode(sim, i, load_values[i]); } } if (update_cpsr) { - uint32_t spsr = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).value, 0, 32); - buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, spsr); + uint32_t spsr = sim->get_reg_mode(sim, 16); + sim->set_reg(sim, ARMV4_5_CPSR, spsr); } /* base register writeback */ if (instruction.info.load_store_multiple.W) - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store_multiple.Rn).value, 0, 32, Rn); + sim->set_reg_mode(sim, instruction.info.load_store_multiple.Rn, Rn); if (instruction.info.load_store_multiple.register_list & 0x8000) return ERROR_OK; @@ -676,9 +676,9 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - uint32_t Rn = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store_multiple.Rn).value, 0, 32); + uint32_t Rn = sim->get_reg_mode(sim, instruction.info.load_store_multiple.Rn); int bits_set = 0; - enum armv4_5_mode mode = armv4_5->core_mode; + enum armv4_5_mode mode = sim->get_mode(sim); for (i = 0; i < 16; i++) { @@ -711,14 +711,14 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) { if (instruction.info.load_store_multiple.register_list & (1 << i)) { - target_write_u32(target, Rn, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i).value, 0, 32)); + target_write_u32(target, Rn, sim->get_reg_mode(sim, i)); Rn += 4; } } /* base register writeback */ if (instruction.info.load_store_multiple.W) - buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, instruction.info.load_store_multiple.Rn).value, 0, 32, Rn); + sim->set_reg_mode(sim, instruction.info.load_store_multiple.Rn, Rn); } } @@ -726,7 +726,8 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) { /* the instruction wasn't handled, but we're supposed to simulate it */ - return ERROR_ARM_SIMULATOR_NOT_IMPLEMENTED; + LOG_ERROR("Unimplemented instruction, could not simulate it."); + return ERROR_FAIL; } if (dry_run_pc) @@ -736,8 +737,88 @@ int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) } else { - buf_set_u32(armv4_5->core_cache->reg_list[15].value, 0, 32, current_pc + instruction_size); + sim->set_reg(sim, 15, current_pc + instruction_size); return ERROR_OK; } } + +static uint32_t armv4_5_get_reg(struct arm_sim_interface *sim, int reg) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + return buf_get_u32(armv4_5->core_cache->reg_list[reg].value, 0, 32); +} + +static void armv4_5_set_reg(struct arm_sim_interface *sim, int reg, uint32_t value) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + buf_set_u32(armv4_5->core_cache->reg_list[reg].value, 0, 32, value); +} + +static uint32_t armv4_5_get_reg_mode(struct arm_sim_interface *sim, int reg) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + return buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, reg).value, 0, 32); +} + +static void armv4_5_set_reg_mode(struct arm_sim_interface *sim, int reg, uint32_t value) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, reg).value, 0, 32, value); +} + +static uint32_t armv4_5_get_cpsr(struct arm_sim_interface *sim, int pos, int bits) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + return buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, pos, bits); +} + +static enum armv4_5_state armv4_5_get_state(struct arm_sim_interface *sim) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + return armv4_5->core_state; +} + +static void armv4_5_set_state(struct arm_sim_interface *sim, enum armv4_5_state mode) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + armv4_5->core_state = mode; +} + + +static enum armv4_5_mode armv4_5_get_mode(struct arm_sim_interface *sim) +{ + armv4_5_common_t *armv4_5 = (armv4_5_common_t *)sim->user_data; + + return armv4_5->core_mode; +} + + + +int arm_simulate_step(target_t *target, uint32_t *dry_run_pc) +{ + armv4_5_common_t *armv4_5 = target->arch_info; + + struct arm_sim_interface sim; + + sim.user_data=armv4_5; + sim.get_reg=&armv4_5_get_reg; + sim.set_reg=&armv4_5_set_reg; + sim.get_reg_mode=&armv4_5_get_reg_mode; + sim.set_reg_mode=&armv4_5_set_reg_mode; + sim.get_cpsr=&armv4_5_get_cpsr; + sim.get_mode=&armv4_5_get_mode; + sim.get_state=&armv4_5_get_state; + sim.set_state=&armv4_5_set_state; + + return arm_simulate_step_core(target, dry_run_pc, &sim); + +} + diff --git a/src/target/arm_simulator.h b/src/target/arm_simulator.h index 971b492f..bad904ba 100644 --- a/src/target/arm_simulator.h +++ b/src/target/arm_simulator.h @@ -24,8 +24,25 @@ struct target_s; +struct arm_sim_interface +{ + void *user_data; + uint32_t (*get_reg)(struct arm_sim_interface *sim, int reg); + void (*set_reg)(struct arm_sim_interface *sim, int reg, uint32_t value); + uint32_t (*get_reg_mode)(struct arm_sim_interface *sim, int reg); + void (*set_reg_mode)(struct arm_sim_interface *sim, int reg, uint32_t value); + uint32_t (*get_cpsr)(struct arm_sim_interface *sim, int pos, int bits); + enum armv4_5_state (*get_state)(struct arm_sim_interface *sim); + void (*set_state)(struct arm_sim_interface *sim, enum armv4_5_state mode); + enum armv4_5_mode (*get_mode)(struct arm_sim_interface *sim); +}; + + +/* armv4_5 version */ extern int arm_simulate_step(struct target_s *target, uint32_t *dry_run_pc); -#define ERROR_ARM_SIMULATOR_NOT_IMPLEMENTED (-700) +/* a generic arm simulator. Caller must implement the sim interface */ +extern int arm_simulate_step_core(target_t *target, uint32_t *dry_run_pc, struct arm_sim_interface *sim); + #endif /* ARM_SIMULATOR_H */ -- 2.39.5