+static int mips_m4k_verify_pointer(struct command_context *cmd_ctx,
+ struct mips_m4k_common *mips_m4k)
+{
+ if (mips_m4k->common_magic != MIPSM4K_COMMON_MAGIC) {
+ command_print(cmd_ctx, "target is not an MIPS_M4K");
+ return ERROR_TARGET_INVALID;
+ }
+ return ERROR_OK;
+}
+
+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)
+ {
+ command_print(CMD_CTX, "command requires more arguments.");
+ }
+ 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;
+
+ if ((retval = mips32_cp0_read(ejtag_info, &value, cp0_reg, cp0_sel)) != ERROR_OK)
+ {
+ command_print(CMD_CTX,
+ "couldn't access reg %" PRIi32,
+ cp0_reg);
+ return ERROR_OK;
+ }
+ if ((retval = jtag_execute_queue()) != ERROR_OK)
+ {
+ return retval;
+ }
+
+ 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);
+ if ((retval = mips32_cp0_write(ejtag_info, value, cp0_reg, cp0_sel)) != 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);
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static const struct command_registration mips_m4k_exec_command_handlers[] = {
+ {
+ .name = "cp0",
+ .handler = mips_m4k_handle_cp0_command,
+ .mode = COMMAND_EXEC,
+ .usage = "regnum [value]",
+ .help = "display/modify cp0 register",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+const struct command_registration mips_m4k_command_handlers[] = {
+ {
+ .chain = mips32_command_handlers,
+ },
+ {
+ .name = "mips_m4k",
+ .mode = COMMAND_ANY,
+ .help = "mips_m4k command group",
+ .chain = mips_m4k_exec_command_handlers,
+ },
+ COMMAND_REGISTRATION_DONE
+};
+