diff options
Diffstat (limited to 'src/target/arm926ejs.c')
| -rw-r--r-- | src/target/arm926ejs.c | 59 |
1 files changed, 22 insertions, 37 deletions
diff --git a/src/target/arm926ejs.c b/src/target/arm926ejs.c index 03adc774..7147dbfd 100644 --- a/src/target/arm926ejs.c +++ b/src/target/arm926ejs.c @@ -29,32 +29,21 @@ #include "target_type.h" -#if 0 -#define _DEBUG_INSTRUCTION_EXECUTION_ -#endif +/* + * The ARM926 is built around the ARM9EJ-S core, and most JTAG docs + * are in the ARM9EJ-S Technical Reference Manual (ARM DDI 0222B) not + * the ARM926 manual (ARM DDI 0198E). The scan chains are: + * + * 1 ... core debugging + * 2 ... EmbeddedICE + * 3 ... external boundary scan (SoC-specific, unused here) + * 6 ... ETM + * 15 ... coprocessor 15 + */ -static int arm926ejs_catch_broken_irscan(uint8_t *captured, void *priv, - scan_field_t *field) -{ - /* FIX!!!! this code should be reenabled. For now it does not check - * the queue...*/ - return 0; #if 0 - /* The ARM926EJ-S' instruction register is 4 bits wide */ - uint8_t t = *captured & 0xf; - uint8_t t2 = *field->in_check_value & 0xf; - if (t == t2) - { - return ERROR_OK; - } - else if ((t == 0x0f) || (t == 0x00)) - { - LOG_DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access"); - return ERROR_OK; - } - return ERROR_JTAG_QUEUE_FAILED;; +#define _DEBUG_INSTRUCTION_EXECUTION_ #endif -} #define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0)) @@ -136,7 +125,7 @@ static int arm926ejs_cp15_read(target_t *target, uint32_t op1, uint32_t op2, LOG_DEBUG("addr: 0x%x value: %8.8x", address, *value); #endif - arm_jtag_set_instr(jtag_info, 0xc, &arm926ejs_catch_broken_irscan); + arm_jtag_set_instr(jtag_info, 0xc, NULL); return ERROR_OK; } @@ -227,7 +216,7 @@ static int arm926ejs_cp15_write(target_t *target, uint32_t op1, uint32_t op2, LOG_DEBUG("addr: 0x%x value: %8.8x", address, value); #endif - arm_jtag_set_instr(jtag_info, 0xf, &arm926ejs_catch_broken_irscan); + arm_jtag_set_instr(jtag_info, 0xf, NULL); return ERROR_OK; } @@ -543,6 +532,7 @@ static int arm926ejs_get_arch_pointers(target_t *target, return ERROR_OK; } +/** Logs summary of ARM926 state for a halted target. */ int arm926ejs_arch_state(struct target_s *target) { armv4_5_common_t *armv4_5 = target->arch_info; @@ -644,6 +634,7 @@ int arm926ejs_soft_reset_halt(struct target_s *target) return target_call_event_callbacks(target, TARGET_EVENT_HALTED); } +/** Writes a buffer, in the specified word size, with current MMU settings. */ int arm926ejs_write_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer) { @@ -732,14 +723,6 @@ static int arm926ejs_read_phys_memory(struct target_s *target, return armv4_5_mmu_read_physical(target, &arm926ejs->armv4_5_mmu, address, size, count, buffer); } -static int arm926ejs_init_target(struct command_context_s *cmd_ctx, - struct target_s *target) -{ - arm9tdmi_init_target(cmd_ctx, target); - - return ERROR_OK; -} - int arm926ejs_init_arch_info(target_t *target, arm926ejs_common_t *arm926ejs, jtag_tap_t *tap) { @@ -782,9 +765,10 @@ static int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp) { arm926ejs_common_t *arm926ejs = calloc(1,sizeof(arm926ejs_common_t)); - arm926ejs_init_arch_info(target, arm926ejs, target->tap); + /* ARM9EJ-S core always reports 0x1 in Capture-IR */ + target->tap->ir_capture_mask = 0x0f; - return ERROR_OK; + return arm926ejs_init_arch_info(target, arm926ejs, target->tap); } static int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, @@ -915,6 +899,7 @@ static int arm926ejs_mmu(struct target_s *target, int *enabled) return ERROR_OK; } +/** Registers commands to access coprocessor, cache, and debug resources. */ int arm926ejs_register_commands(struct command_context_s *cmd_ctx) { int retval; @@ -938,6 +923,7 @@ int arm926ejs_register_commands(struct command_context_s *cmd_ctx) return retval; } +/** Holds methods for ARM926 targets. */ target_type_t arm926ejs_target = { .name = "arm926ejs", @@ -972,7 +958,7 @@ target_type_t arm926ejs_target = .register_commands = arm926ejs_register_commands, .target_create = arm926ejs_target_create, - .init_target = arm926ejs_init_target, + .init_target = arm9tdmi_init_target, .examine = arm9tdmi_examine, .virt2phys = arm926ejs_virt2phys, .mmu = arm926ejs_mmu, @@ -982,4 +968,3 @@ target_type_t arm926ejs_target = .mrc = arm926ejs_mrc, .mcr = arm926ejs_mcr, }; - |