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-rw-r--r--src/target/arm926ejs.c59
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,
};
-