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target/mips32: add mips ejtag command

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Add mips32 ejtag_reg command for inspecting ejtag status.
Add description for mips32 ejtag_reg command.

Change-Id: Icd173d3397d568b0c004a8cc3f45518d7b48ce43
Signed-off-by: Walter Ji <walter.ji@oss.cipunited.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7906
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
This commit is contained in:
Walter Ji
2023-11-17 15:13:55 +08:00
committed by Antonio Borneo
parent b2172ed7d7
commit 019bf5f83c
4 changed files with 99 additions and 3 deletions
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70
src/target/mips32.c
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@@ -1707,6 +1707,69 @@ COMMAND_HANDLER(mips32_handle_cpuinfo_command)
return ERROR_OK;
}
/**
* mips32_handle_ejtag_reg_command - Handler commands related to EJTAG
* @param[in] cmd: Command invocation context
*
* @brief Prints all EJTAG Registers including DCR features.
*
* @return ERROR_OK on success; error code on failure.
*/
COMMAND_HANDLER(mips32_handle_ejtag_reg_command)
{
struct target *target = get_current_target(CMD_CTX);
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
uint32_t ejtag_ctrl;
uint32_t dcr;
int retval;
retval = mips_ejtag_get_idcode(ejtag_info);
if (retval != ERROR_OK)
command_print(CMD, "Error: Encounter an Error while getting idcode");
else
command_print(CMD, " idcode: 0x%8.8" PRIx32, ejtag_info->idcode);
retval = mips_ejtag_get_impcode(ejtag_info);
if (retval != ERROR_OK)
command_print(CMD, "Error: Encounter an Error while getting impcode");
else
command_print(CMD, " impcode: 0x%8.8" PRIx32, ejtag_info->impcode);
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
ejtag_ctrl = ejtag_info->ejtag_ctrl;
retval = mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
if (retval != ERROR_OK)
command_print(CMD, "Error: Encounter an Error while executing drscan reading EJTAG Control register");
else
command_print(CMD, "ejtag control: 0x%8.8" PRIx32, ejtag_ctrl);
ejtag_main_print_imp(ejtag_info);
/* Display current DCR */
retval = target_read_u32(target, EJTAG_DCR, &dcr);
if (retval != ERROR_OK)
command_print(CMD, "Error: Encounter an Error while reading Debug Control Register");
else
command_print(CMD, " DCR: 0x%8.8" PRIx32, dcr);
for (unsigned int i = 0; i < EJTAG_DCR_ENTRIES; i++) {
if (dcr & BIT(dcr_features[i].bit))
command_print(CMD, "%s supported", dcr_features[i].name);
}
return ERROR_OK;
}
/**
* mips32_handle_scan_delay_command - Handler command for changing scan delay
* @param[in] cmd: Command invocation context
*
* @brief Changes current scan mode between legacy and fast queued mode.
*
* @return ERROR_OK on success; error code on failure.
*/
COMMAND_HANDLER(mips32_handle_scan_delay_command)
{
struct target *target = get_current_target(CMD_CTX);
@@ -1752,6 +1815,13 @@ static const struct command_registration mips32_exec_command_handlers[] = {
.help = "display/set scan delay in nano seconds",
.usage = "[value]",
},
{
.name = "ejtag_reg",
.handler = mips32_handle_ejtag_reg_command,
.mode = COMMAND_ANY,
.help = "read ejtag registers",
.usage = "",
},
COMMAND_REGISTRATION_DONE
};