semihosting: move semihosting cmd to arm cmd group

Move semihosting cmd to the arm cmd group.

Targets that support semihosting will setup the
setup_semihosting callback function.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>

doc/openocd.texi

@@ -6021,6 +6021,18 @@ Display a table of all banked core registers, fetching the current value from ev
 core mode if necessary.
 @end deffn
 
+@deffn Command {arm semihosting} [@option{enable}|@option{disable}]
+@cindex ARM semihosting
+Display status of semihosting, after optionally changing that status.
+
+Semihosting allows for code executing on an ARM target to use the
+I/O facilities on the host computer i.e. the system where OpenOCD
+is running. The target application must be linked against a library
+implementing the ARM semihosting convention that forwards operation
+requests by using a special SVC instruction that is trapped at the
+Supervisor Call vector by OpenOCD.
+@end deffn
+
 @section ARMv4 and ARMv5 Architecture
 @cindex ARMv4
 @cindex ARMv5
@@ -6073,18 +6085,6 @@ cables (FT2232), but might be unsafe if used with targets running at very low
 speeds, like the 32kHz startup clock of an AT91RM9200.
 @end deffn
 
-@deffn Command {arm7_9 semihosting} [@option{enable}|@option{disable}]
-@cindex ARM semihosting
-Display status of semihosting, after optionally changing that status.
-
-Semihosting allows for code executing on an ARM target to use the
-I/O facilities on the host computer i.e. the system where OpenOCD
-is running. The target application must be linked against a library
-implementing the ARM semihosting convention that forwards operation
-requests by using a special SVC instruction that is trapped at the
-Supervisor Call vector by OpenOCD.
-@end deffn
-
 @subsection ARM720T specific commands
 @cindex ARM720T
 

src/target/arm.h

@@ -132,6 +132,8 @@ struct arm {
 	/** Value to be returned by semihosting SYS_ERRNO request. */
 	int semihosting_errno;
 
+	int (*setup_semihosting)(struct target *target, int enable);
+
 	/** Backpointer to the target. */
 	struct target *target;
 

src/target/arm7_9_common.c

@@ -2834,54 +2834,32 @@ COMMAND_HANDLER(handle_arm7_9_dcc_downloads_command)
 	return ERROR_OK;
 }
 
-COMMAND_HANDLER(handle_arm7_9_semihosting_command)
+int arm7_9_setup_semihosting(struct target *target, int enable)
 {
-	struct target *target = get_current_target(CMD_CTX);
 	struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 
 	if (!is_arm7_9(arm7_9))
 	{
-		command_print(CMD_CTX, "current target isn't an ARM7/ARM9 target");
+		LOG_USER("current target isn't an ARM7/ARM9 target");
 		return ERROR_TARGET_INVALID;
 	}
 
-	if (CMD_ARGC > 0)
-	{
-		int semihosting;
-
-		COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting);
-
-		if (!target_was_examined(target))
-		{
-			LOG_ERROR("Target not examined yet");
-			return ERROR_FAIL;
-		}
-
-		if (arm7_9->has_vector_catch) {
-			struct reg *vector_catch = &arm7_9->eice_cache
-					->reg_list[EICE_VEC_CATCH];
-
-			if (!vector_catch->valid)
-				embeddedice_read_reg(vector_catch);
-			buf_set_u32(vector_catch->value, 2, 1, semihosting);
-			embeddedice_store_reg(vector_catch);
-		} else {
-			/* TODO: allow optional high vectors and/or BKPT_HARD */
-			if (semihosting)
-				breakpoint_add(target, 8, 4, BKPT_SOFT);
-			else
-				breakpoint_remove(target, 8); 
-		}
-
-		/* FIXME never let that "catch" be dropped! */
-		arm7_9->armv4_5_common.is_semihosting = semihosting;
+	if (arm7_9->has_vector_catch) {
+		struct reg *vector_catch = &arm7_9->eice_cache
+				->reg_list[EICE_VEC_CATCH];
 
+		if (!vector_catch->valid)
+			embeddedice_read_reg(vector_catch);
+		buf_set_u32(vector_catch->value, 2, 1, enable);
+		embeddedice_store_reg(vector_catch);
+	} else {
+		/* TODO: allow optional high vectors and/or BKPT_HARD */
+		if (enable)
+			breakpoint_add(target, 8, 4, BKPT_SOFT);
+		else
+			breakpoint_remove(target, 8);
 	}
 
-	command_print(CMD_CTX, "semihosting is %s",
-			arm7_9->armv4_5_common.is_semihosting
-			? "enabled" : "disabled");
-
 	return ERROR_OK;
 }
 
@@ -2906,6 +2884,7 @@ int arm7_9_init_arch_info(struct target *target, struct arm7_9_common *arm7_9)
 	armv4_5->read_core_reg = arm7_9_read_core_reg;
 	armv4_5->write_core_reg = arm7_9_write_core_reg;
 	armv4_5->full_context = arm7_9_full_context;
+	armv4_5->setup_semihosting = arm7_9_setup_semihosting;
 
 	retval = arm_init_arch_info(target, armv4_5);
 	if (retval != ERROR_OK)
@@ -2939,13 +2918,6 @@ static const struct command_registration arm7_9_any_command_handlers[] = {
 		.usage = "['enable'|'disable']",
 		.help = "use DCC downloads for larger memory writes",
 	},
-	{
-		"semihosting",
-		.handler = handle_arm7_9_semihosting_command,
-		.mode = COMMAND_EXEC,
-		.usage = "['enable'|'disable']",
-		.help = "activate support for semihosting operations",
-	},
 	COMMAND_REGISTRATION_DONE
 };
 const struct command_registration arm7_9_command_handlers[] = {

src/target/armv4_5.c

@@ -951,6 +951,49 @@ static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 	return JIM_OK;
 }
 
+COMMAND_HANDLER(handle_arm_semihosting_command)
+{
+	struct target *target = get_current_target(CMD_CTX);
+	struct arm *arm = target ? target_to_arm(target) : NULL;
+
+	if (!is_arm(arm)) {
+		command_print(CMD_CTX, "current target isn't an ARM");
+		return ERROR_FAIL;
+	}
+
+	if (!arm->setup_semihosting)
+	{
+		command_print(CMD_CTX, "semihosting not supported for current target");
+	}
+
+	if (CMD_ARGC > 0)
+	{
+		int semihosting;
+
+		COMMAND_PARSE_ENABLE(CMD_ARGV[0], semihosting);
+
+		if (!target_was_examined(target))
+		{
+			LOG_ERROR("Target not examined yet");
+			return ERROR_FAIL;
+		}
+
+		if (arm->setup_semihosting(target, semihosting) != ERROR_OK) {
+			LOG_ERROR("Failed to Configure semihosting");
+			return ERROR_FAIL;
+		}
+
+		/* FIXME never let that "catch" be dropped! */
+		arm->is_semihosting = semihosting;
+	}
+
+	command_print(CMD_CTX, "semihosting is %s",
+			arm->is_semihosting
+			? "enabled" : "disabled");
+
+	return ERROR_OK;
+}
+
 static const struct command_registration arm_exec_command_handlers[] = {
 	{
 		.name = "reg",
@@ -985,6 +1028,13 @@ static const struct command_registration arm_exec_command_handlers[] = {
 		.help = "read coprocessor register",
 		.usage = "cpnum op1 CRn op2 CRm",
 	},
+	{
+		"semihosting",
+		.handler = handle_arm_semihosting_command,
+		.mode = COMMAND_EXEC,
+		.usage = "['enable'|'disable']",
+		.help = "activate support for semihosting operations",
+	},
 
 	COMMAND_REGISTRATION_DONE
 };