+COMMAND_HANDLER(mips_m4k_handle_cp0_command)
+{
+ int retval;
+ struct target *target = get_current_target(CMD_CTX);
+ struct mips_m4k_common *mips_m4k = target_to_m4k(target);
+ struct mips_ejtag *ejtag_info = &mips_m4k->mips32.ejtag_info;
+
+ retval = mips_m4k_verify_pointer(CMD_CTX, mips_m4k);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (target->state != TARGET_HALTED) {
+ command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
+ return ERROR_OK;
+ }
+
+ /* two or more argument, access a single register/select (write if third argument is given) */
+ if (CMD_ARGC < 2)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ else {
+ uint32_t cp0_reg, cp0_sel;
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], cp0_reg);
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], cp0_sel);
+
+ if (CMD_ARGC == 2) {
+ uint32_t value;
+ retval = mips32_cp0_read(ejtag_info, &value, cp0_reg, cp0_sel);
+ if (retval != ERROR_OK) {
+ command_print(CMD_CTX,
+ "couldn't access reg %" PRIi32,
+ cp0_reg);
+ return ERROR_OK;
+ }
+ command_print(CMD_CTX, "cp0 reg %" PRIi32 ", select %" PRIi32 ": %8.8" PRIx32,
+ cp0_reg, cp0_sel, value);
+
+ } else if (CMD_ARGC == 3) {
+ uint32_t value;
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], value);
+ retval = mips32_cp0_write(ejtag_info, value, cp0_reg, cp0_sel);
+ if (retval != ERROR_OK) {
+ command_print(CMD_CTX,
+ "couldn't access cp0 reg %" PRIi32 ", select %" PRIi32,
+ cp0_reg, cp0_sel);
+ return ERROR_OK;
+ }
+ command_print(CMD_CTX, "cp0 reg %" PRIi32 ", select %" PRIi32 ": %8.8" PRIx32,
+ cp0_reg, cp0_sel, value);