- adds two speeds to jtag_speed. reset and post reset speed. Default

is post reset = reset speed.
- removed infinite loop's and exit()'s upon poor arm7/9 communication
- cleaned up error messages a bit. Push ERROR() up into fn's that
  fail and can say something meaningful about what failed.


git-svn-id: svn://svn.berlios.de/openocd/trunk@511 b42882b7-edfa-0310-969c-e2dbd0fdcd60

3 files changed, 76 insertions, 107 deletions

diff --git a/src/target/arm7_9_common.c b/src/target/arm7_9_common.c
index a7d756a3..5ce1db56 100644
--- a/src/target/arm7_9_common.c
+++ b/src/target/arm7_9_common.c
@@ -1753,7 +1753,6 @@ int arm7_9_read_core_reg(struct target_s *target, int num, enum armv4_5_mode mod
 int arm7_9_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mode, u32 value)
 {
 	u32 reg[16];
-	int retval;
 	armv4_5_common_t *armv4_5 = target->arch_info;
 	arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 	enum armv4_5_mode reg_mode = ((armv4_5_core_reg_t*)ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, mode, num).arch_info)->mode;
@@ -1805,14 +1804,7 @@ int arm7_9_write_core_reg(struct target_s *target, int num, enum armv4_5_mode mo
 		arm7_9->write_xpsr_im8(target, buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 8) & ~0x20, 0, 0);
 	}
 	
-	if ((retval = jtag_execute_queue()) != ERROR_OK)
-	{
-		ERROR("JTAG failure");
-		exit(-1);
-	}
-	
-	return ERROR_OK;
-	
+	return jtag_execute_queue();
 }
 
 int arm7_9_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
@@ -2217,8 +2209,18 @@ int arm7_9_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffe
 	
 	target->type->halt(target);
 	
-	while (target->state != TARGET_HALTED)
+	for (i=0; i<100; i++)
+	{
 		target->type->poll(target);
+		if (target->state == TARGET_HALTED)
+			break;
+		usleep(1000); /* sleep 1ms */
+	}
+	if (i == 100)
+	{
+		ERROR("bulk write timed out, target not halted");
+		return ERROR_TARGET_TIMEOUT;
+	}
 	
 	/* restore target state */
 	buf_set_u32(armv4_5->core_cache->reg_list[0].value, 0, 32, r0);
@@ -2378,7 +2380,7 @@ int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cm
 	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
 		ERROR("JTAG error while writing to xpsr");
-		exit(-1);
+		return retval;
 	}
 	
 	return ERROR_OK;
@@ -2420,7 +2422,7 @@ int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char
 	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
 		ERROR("JTAG error while writing 8-bit immediate to xpsr");
-		exit(-1);
+		return retval;
 	}
 	
 	return ERROR_OK;
diff --git a/src/target/target.c b/src/target/target.c
index 51aef65e..c90470c1 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -260,7 +260,9 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 	int retval = ERROR_OK;
 	target_t *target;
 	struct timeval timeout, now;
-	
+
+	jtag->speed(jtag_speed);
+
 	/* prepare reset_halt where necessary */
 	target = targets;
 	while (target)
@@ -339,7 +341,7 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 		target = target->next;
 	}
 	jtag_execute_queue();
-
+	
 	/* Wait for reset to complete, maximum 5 seconds. */	
 	gettimeofday(&timeout, NULL);
 	timeval_add_time(&timeout, 5, 0);
@@ -347,7 +349,7 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 	{
 		gettimeofday(&now, NULL);
 		
-		target_call_timer_callbacks();
+		target_call_timer_callbacks_now();
 		
 		target = targets;
 		while (target)
@@ -379,7 +381,9 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 	
 	
 	/* We want any events to be processed before the prompt */
-	target_call_timer_callbacks();
+	target_call_timer_callbacks_now();
+
+	jtag->speed(jtag_speed_post_reset);
 	
 	return retval;
 }
@@ -608,6 +612,16 @@ int target_call_timer_callbacks()
 	return ERROR_OK;
 }
 
+int target_call_timer_callbacks_now()
+{
+	/* TODO: this should invoke the timer callbacks now. This is used to ensure that
+	 * any outstanding polls, etc. are in fact invoked before a synchronous command 
+	 * completes. 
+	 */
+	return target_call_timer_callbacks();
+}
+
+
 int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area)
 {
 	working_area_t *c = target->working_areas;
@@ -1278,7 +1292,6 @@ int handle_run_and_halt_time_command(struct command_context_s *cmd_ctx, char *cm
 	}
 	
 	target = get_target_by_num(strtoul(args[0], NULL, 0));
-	
 	if (!target)
 	{
 		return ERROR_COMMAND_SYNTAX_ERROR;
@@ -1299,7 +1312,6 @@ int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, ch
 	}
 	
 	target = get_target_by_num(strtoul(args[0], NULL, 0));
-	
 	if (!target)
 	{
 		return ERROR_COMMAND_SYNTAX_ERROR;
@@ -1531,7 +1543,7 @@ static void target_process_events(struct command_context_s *cmd_ctx)
 {
 	target_t *target = get_current_target(cmd_ctx);
 	target->type->poll(target);
-	target_call_timer_callbacks();
+	target_call_timer_callbacks_now();
 }
 
 static int wait_state(struct command_context_s *cmd_ctx, char *cmd, enum target_state state, int ms)
@@ -1547,7 +1559,7 @@ static int wait_state(struct command_context_s *cmd_ctx, char *cmd, enum target_
 	{
 		if ((retval=target->type->poll(target))!=ERROR_OK)
 			return retval;
-		target_call_timer_callbacks();
+		target_call_timer_callbacks_now();
 		if (target->state == state)
 		{
 			break;
@@ -1577,9 +1589,9 @@ int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **arg
 	DEBUG("-");
 
 	if ((retval = target->type->halt(target)) != ERROR_OK)
-		{
-				return retval;
-		}
+	{
+		return retval;
+	}
 	
 	return handle_wait_halt_command(cmd_ctx, cmd, args, argc);
 }
@@ -1745,51 +1757,37 @@ int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args,
 
 	buffer = calloc(count, size);
 	retval  = target->type->read_memory(target, address, size, count, buffer);
-	if (retval != ERROR_OK)
+	if (retval == ERROR_OK)
 	{
-		switch (retval)
+		output_len = 0;
+	
+		for (i = 0; i < count; i++)
 		{
-			case ERROR_TARGET_UNALIGNED_ACCESS:
-				command_print(cmd_ctx, "error: address not aligned");
-				break;
-			case ERROR_TARGET_NOT_HALTED:
-				command_print(cmd_ctx, "error: target must be halted for memory accesses");
-				break;			
-			case ERROR_TARGET_DATA_ABORT:
-				command_print(cmd_ctx, "error: access caused data abort, system possibly corrupted");
-				break;
-			default:
-				command_print(cmd_ctx, "error: unknown error");
-				break;
+			if (i%line_modulo == 0)
+				output_len += snprintf(output + output_len, 128 - output_len, "0x%8.8x: ", address + (i*size));
+			
+			switch (size)
+			{
+				case 4:
+					output_len += snprintf(output + output_len, 128 - output_len, "%8.8x ", target_buffer_get_u32(target, &buffer[i*4]));
+					break;
+				case 2:
+					output_len += snprintf(output + output_len, 128 - output_len, "%4.4x ", target_buffer_get_u16(target, &buffer[i*2]));
+					break;
+				case 1:
+					output_len += snprintf(output + output_len, 128 - output_len, "%2.2x ", buffer[i*1]);
+					break;
+			}
+	
+			if ((i%line_modulo == line_modulo-1) || (i == count - 1))
+			{
+				command_print(cmd_ctx, output);
+				output_len = 0;
+			}
 		}
-		return ERROR_OK;
-	}
-
-	output_len = 0;
-
-	for (i = 0; i < count; i++)
+	} else
 	{
-		if (i%line_modulo == 0)
-			output_len += snprintf(output + output_len, 128 - output_len, "0x%8.8x: ", address + (i*size));
-		
-		switch (size)
-		{
-			case 4:
-				output_len += snprintf(output + output_len, 128 - output_len, "%8.8x ", target_buffer_get_u32(target, &buffer[i*4]));
-				break;
-			case 2:
-				output_len += snprintf(output + output_len, 128 - output_len, "%4.4x ", target_buffer_get_u16(target, &buffer[i*2]));
-				break;
-			case 1:
-				output_len += snprintf(output + output_len, 128 - output_len, "%2.2x ", buffer[i*1]);
-				break;
-		}
-
-		if ((i%line_modulo == line_modulo-1) || (i == count - 1))
-		{
-			command_print(cmd_ctx, output);
-			output_len = 0;
-		}
+		ERROR("Failure examining memory");
 	}
 
 	free(buffer);
@@ -1828,23 +1826,9 @@ int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args,
 		default:
 			return ERROR_OK;
 	}
-
-	switch (retval)
+	if (retval!=ERROR_OK)
 	{
-		case ERROR_TARGET_UNALIGNED_ACCESS:
-			command_print(cmd_ctx, "error: address not aligned");
-			break;
-		case ERROR_TARGET_DATA_ABORT:
-			command_print(cmd_ctx, "error: access caused data abort, system possibly corrupted");
-			break;
-		case ERROR_TARGET_NOT_HALTED:
-			command_print(cmd_ctx, "error: target must be halted for memory accesses");
-			break;
-		case ERROR_OK:
-			break;
-		default:
-			command_print(cmd_ctx, "error: unknown error");
-			break;
+		ERROR("Failure examining memory");
 	}
 
 	return ERROR_OK;
@@ -2070,7 +2054,6 @@ int handle_verify_image_command(struct command_context_s *cmd_ctx, char *cmd, ch
 		image_calculate_checksum( buffer, buf_cnt, &checksum );
 		
 		retval = target_checksum_memory(target, image.sections[i].base_address, buf_cnt, &mem_checksum);
-		
 		if( retval != ERROR_OK )
 		{
 			free(buffer);
@@ -2095,7 +2078,6 @@ int handle_verify_image_command(struct command_context_s *cmd_ctx, char *cmd, ch
 				count /= 4;
 			}
 			retval = target->type->read_memory(target, image.sections[i].base_address, size, count, data);
-	
 			if (retval == ERROR_OK)
 			{
 				int t;
@@ -2168,18 +2150,7 @@ int handle_bp_command(struct command_context_s *cmd_ctx, char *cmd, char **args,
 
 		if ((retval = breakpoint_add(target, strtoul(args[0], NULL, 0), length, hw)) != ERROR_OK)
 		{
-			switch (retval)
-			{
-				case ERROR_TARGET_NOT_HALTED:
-					command_print(cmd_ctx, "target must be halted to set breakpoints");
-					break;
-				case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
-					command_print(cmd_ctx, "no more breakpoints available");
-					break;
-				default:
-					command_print(cmd_ctx, "unknown error, breakpoint not set");
-					break;
-			}
+			ERROR("Failure setting breakpoints");
 		}
 		else
 		{
@@ -2255,18 +2226,7 @@ int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char **args,
 		if ((retval = watchpoint_add(target, strtoul(args[0], NULL, 0),
 				strtoul(args[1], NULL, 0), type, data_value, data_mask)) != ERROR_OK)
 		{
-			switch (retval)
-			{
-				case ERROR_TARGET_NOT_HALTED:
-					command_print(cmd_ctx, "target must be halted to set watchpoints");
-					break;
-				case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
-					command_print(cmd_ctx, "no more watchpoints available");
-					break;
-				default:
-					command_print(cmd_ctx, "unknown error, watchpoint not set");
-					break;
-			}	
+			ERROR("Failure setting breakpoints");
 		}
 	}
 	else
diff --git a/src/target/target.h b/src/target/target.h
index e0286650..b75317b3 100644
--- a/src/target/target.h
+++ b/src/target/target.h
@@ -239,9 +239,16 @@ extern int target_register_event_callback(int (*callback)(struct target_s *targe
 extern int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv);
 extern int target_call_event_callbacks(target_t *target, enum target_event event);
 
+/* The period is very approximate, the callback can happen much more often 
+ * or much more rarely than specified
+ */
 extern int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv);
 extern int target_unregister_timer_callback(int (*callback)(void *priv), void *priv);
-extern int target_call_timer_callbacks();
+extern int target_call_timer_callbacks_now();
+/* invoke this to ensure that e.g. polling timer callbacks happen before
+ * a syncrhonous command completes.
+ */
+extern int target_call_timer_callbacks_now_now();
 
 extern target_t* get_current_target(struct command_context_s *cmd_ctx);
 extern int get_num_by_target(target_t *query_target);