target.c 65.3 KB
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/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "replacements.h"
#include "target.h"
#include "target_request.h"

#include "log.h"
#include "configuration.h"
#include "binarybuffer.h"
#include "jtag.h"

#include <string.h>
#include <stdlib.h>
#include <inttypes.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>

#include <sys/time.h>
#include <time.h>

#include <time_support.h>

#include <fileio.h>
#include <image.h>

int cli_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv);


int handle_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

int handle_target_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_run_and_halt_time_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_wait_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_reset_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_soft_reset_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_resume_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_step_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_md_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_mw_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_load_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_dump_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_verify_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_bp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_rbp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_wp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_rwp_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_virt2phys_command(command_context_t *cmd_ctx, char *cmd, char **args, int argc);
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int handle_profile_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
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/* targets
 */
extern target_type_t arm7tdmi_target;
extern target_type_t arm720t_target;
extern target_type_t arm9tdmi_target;
extern target_type_t arm920t_target;
extern target_type_t arm966e_target;
extern target_type_t arm926ejs_target;
extern target_type_t feroceon_target;
extern target_type_t xscale_target;
extern target_type_t cortexm3_target;
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extern target_type_t arm11_target;
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target_type_t *target_types[] =
{
	&arm7tdmi_target,
	&arm9tdmi_target,
	&arm920t_target,
	&arm720t_target,
	&arm966e_target,
	&arm926ejs_target,
	&feroceon_target,
	&xscale_target,
	&cortexm3_target,
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	&arm11_target,
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	NULL,
};

target_t *targets = NULL;
target_event_callback_t *target_event_callbacks = NULL;
target_timer_callback_t *target_timer_callbacks = NULL;

char *target_state_strings[] =
{
	"unknown",
	"running",
	"halted",
	"reset",
	"debug_running",
};

char *target_debug_reason_strings[] =
{
	"debug request", "breakpoint", "watchpoint",
	"watchpoint and breakpoint", "single step",
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	"target not halted", "undefined"
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};

char *target_endianess_strings[] =
{
	"big endian",
	"little endian",
};

static int target_continous_poll = 1;

/* read a u32 from a buffer in target memory endianness */
u32 target_buffer_get_u32(target_t *target, u8 *buffer)
{
	if (target->endianness == TARGET_LITTLE_ENDIAN)
		return le_to_h_u32(buffer);
	else
		return be_to_h_u32(buffer);
}

/* read a u16 from a buffer in target memory endianness */
u16 target_buffer_get_u16(target_t *target, u8 *buffer)
{
	if (target->endianness == TARGET_LITTLE_ENDIAN)
		return le_to_h_u16(buffer);
	else
		return be_to_h_u16(buffer);
}

/* write a u32 to a buffer in target memory endianness */
void target_buffer_set_u32(target_t *target, u8 *buffer, u32 value)
{
	if (target->endianness == TARGET_LITTLE_ENDIAN)
		h_u32_to_le(buffer, value);
	else
		h_u32_to_be(buffer, value);
}

/* write a u16 to a buffer in target memory endianness */
void target_buffer_set_u16(target_t *target, u8 *buffer, u16 value)
{
	if (target->endianness == TARGET_LITTLE_ENDIAN)
		h_u16_to_le(buffer, value);
	else
		h_u16_to_be(buffer, value);
}

/* returns a pointer to the n-th configured target */
target_t* get_target_by_num(int num)
{
	target_t *target = targets;
	int i = 0;

	while (target)
	{
		if (num == i)
			return target;
		target = target->next;
		i++;
	}

	return NULL;
}

int get_num_by_target(target_t *query_target)
{
	target_t *target = targets;
	int i = 0;	
	
	while (target)
	{
		if (target == query_target)
			return i;
		target = target->next;
		i++;
	}
	
	return -1;
}

target_t* get_current_target(command_context_t *cmd_ctx)
{
	target_t *target = get_target_by_num(cmd_ctx->current_target);
	
	if (target == NULL)
	{
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		LOG_ERROR("BUG: current_target out of bounds");
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		exit(-1);
	}
	
	return target;
}

/* Process target initialization, when target entered debug out of reset
 * the handler is unregistered at the end of this function, so it's only called once
 */
int target_init_handler(struct target_s *target, enum target_event event, void *priv)
{
	FILE *script;
	struct command_context_s *cmd_ctx = priv;
	
	if ((event == TARGET_EVENT_HALTED) && (target->reset_script))
	{
		target_unregister_event_callback(target_init_handler, priv);

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		script = open_file_from_path(target->reset_script, "r");
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		if (!script)
		{
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			LOG_ERROR("couldn't open script file %s", target->reset_script);
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				return ERROR_OK;
		}

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		LOG_INFO("executing reset script '%s'", target->reset_script);
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		command_run_file(cmd_ctx, script, COMMAND_EXEC);
		fclose(script);

		jtag_execute_queue();
	}
	
	return ERROR_OK;
}

int target_run_and_halt_handler(void *priv)
{
	target_t *target = priv;
	
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	target_halt(target);
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	return ERROR_OK;
}

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int target_poll(struct target_s *target)
{
	/* We can't poll until after examine */
	if (!target->type->examined)
	{
		/* Fail silently lest we pollute the log */
		return ERROR_FAIL;
	}
	return target->type->poll(target);
}

int target_halt(struct target_s *target)
{
	/* We can't poll until after examine */
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->halt(target);
}

int target_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
{
	/* We can't poll until after examine */
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->resume(target, current, address, handle_breakpoints, debug_execution);
}


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int target_process_reset(struct command_context_s *cmd_ctx)
{
	int retval = ERROR_OK;
	target_t *target;
	struct timeval timeout, now;
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	jtag->speed(jtag_speed);

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	if ((retval = jtag_init_reset(cmd_ctx)) != ERROR_OK)
		return retval;
	
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	/* First time this is executed after launching OpenOCD, it will read out 
	 * the type of CPU, etc. and init Embedded ICE registers in host
	 * memory. 
	 * 
	 * It will also set up ICE registers in the target.
	 * 
	 * However, if we assert TRST later, we need to set up the registers again. 
	 * 
	 * For the "reset halt/init" case we must only set up the registers here.
	 */
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	if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
		return retval;
	
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	/* prepare reset_halt where necessary */
	target = targets;
	while (target)
	{
		if (jtag_reset_config & RESET_SRST_PULLS_TRST)
		{
			switch (target->reset_mode)
			{
				case RESET_HALT:
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					command_print(cmd_ctx, "nSRST pulls nTRST, falling back to \"reset run_and_halt\"");
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					target->reset_mode = RESET_RUN_AND_HALT;
					break;
				case RESET_INIT:
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					command_print(cmd_ctx, "nSRST pulls nTRST, falling back to \"reset run_and_init\"");
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					target->reset_mode = RESET_RUN_AND_INIT;
					break;
				default:
					break;
			} 
		}
		target = target->next;
	}
	
	target = targets;
	while (target)
	{
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		/* we have no idea what state the target is in, so we
		 * have to drop working areas
		 */
		target_free_all_working_areas_restore(target, 0);
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		target->type->assert_reset(target);
		target = target->next;
	}
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	if ((retval = jtag_execute_queue()) != ERROR_OK)
	{
		LOG_WARNING("JTAG communication failed asserting reset.");
		retval = ERROR_OK;
	}
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	/* request target halt if necessary, and schedule further action */
	target = targets;
	while (target)
	{
		switch (target->reset_mode)
		{
			case RESET_RUN:
				/* nothing to do if target just wants to be run */
				break;
			case RESET_RUN_AND_HALT:
				/* schedule halt */
				target_register_timer_callback(target_run_and_halt_handler, target->run_and_halt_time, 0, target);
				break;
			case RESET_RUN_AND_INIT:
				/* schedule halt */
				target_register_timer_callback(target_run_and_halt_handler, target->run_and_halt_time, 0, target);
				target_register_event_callback(target_init_handler, cmd_ctx);
				break;
			case RESET_HALT:
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				target_halt(target);
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				break;
			case RESET_INIT:
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				target_halt(target);
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				target_register_event_callback(target_init_handler, cmd_ctx);
				break;
			default:
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				LOG_ERROR("BUG: unknown target->reset_mode");
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		}
		target = target->next;
	}
	
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	if ((retval = jtag_execute_queue()) != ERROR_OK)
	{
		LOG_WARNING("JTAG communication failed while reset was asserted. Consider using srst_only for reset_config.");
		retval = ERROR_OK;		
	}
	
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	target = targets;
	while (target)
	{
		target->type->deassert_reset(target);
		target = target->next;
	}
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	if ((retval = jtag_execute_queue()) != ERROR_OK)
	{
		LOG_WARNING("JTAG communication failed while deasserting reset.");
		retval = ERROR_OK;
	}

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	if (jtag_reset_config & RESET_SRST_PULLS_TRST)
	{
		/* If TRST was asserted we need to set up registers again */
		if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
			return retval;
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	}		
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	LOG_DEBUG("Waiting for halted stated as approperiate");
	
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	/* Wait for reset to complete, maximum 5 seconds. */	
	gettimeofday(&timeout, NULL);
	timeval_add_time(&timeout, 5, 0);
	for(;;)
	{
		gettimeofday(&now, NULL);
		
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		target_call_timer_callbacks_now();
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		target = targets;
		while (target)
		{
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			LOG_DEBUG("Polling target");
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			target_poll(target);
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			if ((target->reset_mode == RESET_RUN_AND_INIT) || 
					(target->reset_mode == RESET_RUN_AND_HALT) ||
					(target->reset_mode == RESET_HALT) ||
					(target->reset_mode == RESET_INIT))
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			{
				if (target->state != TARGET_HALTED)
				{
					if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec)))
					{
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						LOG_USER("Timed out waiting for halt after reset");
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						goto done;
					}
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					/* this will send alive messages on e.g. GDB remote protocol. */
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					usleep(500*1000); 
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					LOG_USER_N("%s", ""); /* avoid warning about zero length formatting message*/ 
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					goto again;
				}
			}
			target = target->next;
		}
		/* All targets we're waiting for are halted */
		break;
		
		again:;
	}
	done:
	
	
	/* We want any events to be processed before the prompt */
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	target_call_timer_callbacks_now();

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	/* if we timed out we need to unregister these handlers */
	target = targets;
	while (target)
	{
		target_unregister_timer_callback(target_run_and_halt_handler, target);
		target = target->next;
	}
	target_unregister_event_callback(target_init_handler, cmd_ctx);
				
	
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	jtag->speed(jtag_speed_post_reset);
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	return retval;
}

static int default_virt2phys(struct target_s *target, u32 virtual, u32 *physical)
{
	*physical = virtual;
	return ERROR_OK;
}

static int default_mmu(struct target_s *target, int *enabled)
{
	*enabled = 0;
	return ERROR_OK;
}

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static int default_examine(struct command_context_s *cmd_ctx, struct target_s *target)
{
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	target->type->examined = 1;
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	return ERROR_OK;
}


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/* Targets that correctly implement init+examine, i.e.
 * no communication with target during init:
 * 
 * XScale 
 */
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int target_examine(struct command_context_s *cmd_ctx)
{
	int retval = ERROR_OK;
	target_t *target = targets;
	while (target)
	{
		if ((retval = target->type->examine(cmd_ctx, target))!=ERROR_OK)
			return retval;
		target = target->next;
	}
	return retval;
}
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static int target_write_memory_imp(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
{
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->write_memory_imp(target, address, size, count, buffer);
}

static int target_read_memory_imp(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
{
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->read_memory_imp(target, address, size, count, buffer);
}

static int target_soft_reset_halt_imp(struct target_s *target)
{
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->soft_reset_halt_imp(target);
}

static int target_run_algorithm_imp(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_param, u32 entry_point, u32 exit_point, int timeout_ms, void *arch_info)
{
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	return target->type->run_algorithm_imp(target, num_mem_params, mem_params, num_reg_params, reg_param, entry_point, exit_point, timeout_ms, arch_info);
}
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int target_init(struct command_context_s *cmd_ctx)
{
	target_t *target = targets;
	
	while (target)
	{
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		target->type->examined = 0;
		if (target->type->examine == NULL)
		{
			target->type->examine = default_examine;
		}
		
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		if (target->type->init_target(cmd_ctx, target) != ERROR_OK)
		{
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			LOG_ERROR("target '%s' init failed", target->type->name);
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			exit(-1);
		}
		
		/* Set up default functions if none are provided by target */
		if (target->type->virt2phys == NULL)
		{
			target->type->virt2phys = default_virt2phys;
		}
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		target->type->virt2phys = default_virt2phys;
		/* a non-invasive way(in terms of patches) to add some code that
		 * runs before the type->write/read_memory implementation
		 */
		target->type->write_memory_imp = target->type->write_memory;
		target->type->write_memory = target_write_memory_imp;
		target->type->read_memory_imp = target->type->read_memory;
		target->type->read_memory = target_read_memory_imp;
		target->type->soft_reset_halt_imp = target->type->soft_reset_halt;
		target->type->soft_reset_halt = target_soft_reset_halt_imp;
		target->type->run_algorithm_imp = target->type->run_algorithm;
		target->type->run_algorithm = target_run_algorithm_imp;

		
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		if (target->type->mmu == NULL)
		{
			target->type->mmu = default_mmu;
		}
		target = target->next;
	}
	
	if (targets)
	{
		target_register_user_commands(cmd_ctx);
		target_register_timer_callback(handle_target, 100, 1, NULL);
	}
		
	return ERROR_OK;
}

int target_register_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv)
{
	target_event_callback_t **callbacks_p = &target_event_callbacks;
	
	if (callback == NULL)
	{
		return ERROR_INVALID_ARGUMENTS;
	}
	
	if (*callbacks_p)
	{
		while ((*callbacks_p)->next)
			callbacks_p = &((*callbacks_p)->next);
		callbacks_p = &((*callbacks_p)->next);
	}
	
	(*callbacks_p) = malloc(sizeof(target_event_callback_t));
	(*callbacks_p)->callback = callback;
	(*callbacks_p)->priv = priv;
	(*callbacks_p)->next = NULL;
	
	return ERROR_OK;
}

int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv)
{
	target_timer_callback_t **callbacks_p = &target_timer_callbacks;
	struct timeval now;
	
	if (callback == NULL)
	{
		return ERROR_INVALID_ARGUMENTS;
	}
	
	if (*callbacks_p)
	{
		while ((*callbacks_p)->next)
			callbacks_p = &((*callbacks_p)->next);
		callbacks_p = &((*callbacks_p)->next);
	}
	
	(*callbacks_p) = malloc(sizeof(target_timer_callback_t));
	(*callbacks_p)->callback = callback;
	(*callbacks_p)->periodic = periodic;
	(*callbacks_p)->time_ms = time_ms;
	
	gettimeofday(&now, NULL);
	(*callbacks_p)->when.tv_usec = now.tv_usec + (time_ms % 1000) * 1000;
	time_ms -= (time_ms % 1000);
	(*callbacks_p)->when.tv_sec = now.tv_sec + (time_ms / 1000);
	if ((*callbacks_p)->when.tv_usec > 1000000)
	{
		(*callbacks_p)->when.tv_usec = (*callbacks_p)->when.tv_usec - 1000000;
		(*callbacks_p)->when.tv_sec += 1;
	}
	
	(*callbacks_p)->priv = priv;
	(*callbacks_p)->next = NULL;
	
	return ERROR_OK;
}

int target_unregister_event_callback(int (*callback)(struct target_s *target, enum target_event event, void *priv), void *priv)
{
	target_event_callback_t **p = &target_event_callbacks;
	target_event_callback_t *c = target_event_callbacks;
	
	if (callback == NULL)
	{
		return ERROR_INVALID_ARGUMENTS;
	}
		
	while (c)
	{
		target_event_callback_t *next = c->next;
		if ((c->callback == callback) && (c->priv == priv))
		{
			*p = next;
			free(c);
			return ERROR_OK;
		}
		else
			p = &(c->next);
		c = next;
	}
	
	return ERROR_OK;
}

int target_unregister_timer_callback(int (*callback)(void *priv), void *priv)
{
	target_timer_callback_t **p = &target_timer_callbacks;
	target_timer_callback_t *c = target_timer_callbacks;
	
	if (callback == NULL)
	{
		return ERROR_INVALID_ARGUMENTS;
	}
		
	while (c)
	{
		target_timer_callback_t *next = c->next;
		if ((c->callback == callback) && (c->priv == priv))
		{
			*p = next;
			free(c);
			return ERROR_OK;
		}
		else
			p = &(c->next);
		c = next;
	}
	
	return ERROR_OK;
}

int target_call_event_callbacks(target_t *target, enum target_event event)
{
	target_event_callback_t *callback = target_event_callbacks;
	target_event_callback_t *next_callback;
	
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	while (callback)
	{
		next_callback = callback->next;
		callback->callback(target, event, callback->priv);
		callback = next_callback;
	}
	
	return ERROR_OK;
}

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static int target_call_timer_callbacks_check_time(int checktime)
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{
	target_timer_callback_t *callback = target_timer_callbacks;
	target_timer_callback_t *next_callback;
	struct timeval now;

	gettimeofday(&now, NULL);
	
	while (callback)
	{
		next_callback = callback->next;
		
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		if ((!checktime&&callback->periodic)||
				(((now.tv_sec >= callback->when.tv_sec) && (now.tv_usec >= callback->when.tv_usec))
						|| (now.tv_sec > callback->when.tv_sec)))
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		{
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			if(callback->callback != NULL)
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			{
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				callback->callback(callback->priv);
				if (callback->periodic)
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				{
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					int time_ms = callback->time_ms;
					callback->when.tv_usec = now.tv_usec + (time_ms % 1000) * 1000;
					time_ms -= (time_ms % 1000);
					callback->when.tv_sec = now.tv_sec + time_ms / 1000;
					if (callback->when.tv_usec > 1000000)
					{
						callback->when.tv_usec = callback->when.tv_usec - 1000000;
						callback->when.tv_sec += 1;
					}
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				}
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				else
					target_unregister_timer_callback(callback->callback, callback->priv);
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			}
		}
			
		callback = next_callback;
	}
	
	return ERROR_OK;
}

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int target_call_timer_callbacks()
{
	return target_call_timer_callbacks_check_time(1);
}

/* invoke periodic callbacks immediately */
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int target_call_timer_callbacks_now()
{
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	return target_call_timer_callbacks(0);
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}


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int target_alloc_working_area(struct target_s *target, u32 size, working_area_t **area)
{
	working_area_t *c = target->working_areas;
	working_area_t *new_wa = NULL;
	
	/* Reevaluate working area address based on MMU state*/
	if (target->working_areas == NULL)
	{
		int retval;
		int enabled;
		retval = target->type->mmu(target, &enabled);
		if (retval != ERROR_OK)
		{
			return retval;
		}
		if (enabled)
		{
			target->working_area = target->working_area_virt;
		}
		else
		{
			target->working_area = target->working_area_phys;
		}
	}
	
	/* only allocate multiples of 4 byte */
	if (size % 4)
	{
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		LOG_ERROR("BUG: code tried to allocate unaligned number of bytes, padding");
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		size = CEIL(size, 4);
	}
	
	/* see if there's already a matching working area */
	while (c)
	{
		if ((c->free) && (c->size == size))
		{
			new_wa = c;
			break;
		}
		c = c->next;
	}
	
	/* if not, allocate a new one */
	if (!new_wa)
	{
		working_area_t **p = &target->working_areas;
		u32 first_free = target->working_area;
		u32 free_size = target->working_area_size;
		
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		LOG_DEBUG("allocating new working area");
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		c = target->working_areas;
		while (c)
		{
			first_free += c->size;
			free_size -= c->size;
			p = &c->next;
			c = c->next;
		}
		
		if (free_size < size)
		{
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			LOG_WARNING("not enough working area available(requested %d, free %d)", size, free_size);
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			return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
		}
		
		new_wa = malloc(sizeof(working_area_t));
		new_wa->next = NULL;
		new_wa->size = size;
		new_wa->address = first_free;
		
		if (target->backup_working_area)
		{
			new_wa->backup = malloc(new_wa->size);
			target->type->read_memory(target, new_wa->address, 4, new_wa->size / 4, new_wa->backup);
		}
		else
		{
			new_wa->backup = NULL;
		}
		
		/* put new entry in list */
		*p = new_wa;
	}
	
	/* mark as used, and return the new (reused) area */
	new_wa->free = 0;
	*area = new_wa;
	
	/* user pointer */
	new_wa->user = area;
	
	return ERROR_OK;
}

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int target_free_working_area_restore(struct target_s *target, working_area_t *area, int restore)
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{
	if (area->free)
		return ERROR_OK;
	
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	if (restore&&target->backup_working_area)
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		target->type->write_memory(target, area->address, 4, area->size / 4, area->backup);
	
	area->free = 1;
	
	/* mark user pointer invalid */
	*area->user = NULL;
	area->user = NULL;
	
	return ERROR_OK;
}

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int target_free_working_area(struct target_s *target, working_area_t *area)
{
	return target_free_working_area_restore(target, area, 1);
}

int target_free_all_working_areas_restore(struct target_s *target, int restore)
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{
	working_area_t *c = target->working_areas;

	while (c)
	{
		working_area_t *next = c->next;
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		target_free_working_area_restore(target, c, restore);
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		if (c->backup)
			free(c->backup);
		
		free(c);
		
		c = next;
	}
	
	target->working_areas = NULL;
	
	return ERROR_OK;
}

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int target_free_all_working_areas(struct target_s *target)
{
	return target_free_all_working_areas_restore(target, 1); 
}

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int target_register_commands(struct command_context_s *cmd_ctx)
{
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	register_command(cmd_ctx, NULL, "target", handle_target_command, COMMAND_CONFIG, "target <cpu> [reset_init default - DEPRECATED] <chainpos> <endianness> <variant> [cpu type specifc args]");
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	register_command(cmd_ctx, NULL, "targets", handle_targets_command, COMMAND_EXEC, NULL);
	register_command(cmd_ctx, NULL, "target_script", handle_target_script_command, COMMAND_CONFIG, NULL);
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	register_command(cmd_ctx, NULL, "run_and_halt_time", handle_run_and_halt_time_command, COMMAND_CONFIG, "<target> <run time ms>");
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	register_command(cmd_ctx, NULL, "working_area", handle_working_area_command, COMMAND_ANY, "working_area <target#> <address> <size> <'backup'|'nobackup'> [virtual address]");
	register_command(cmd_ctx, NULL, "virt2phys", handle_virt2phys_command, COMMAND_ANY, "virt2phys <virtual address>");
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	register_command(cmd_ctx, NULL, "profile", handle_profile_command, COMMAND_EXEC, "PRELIMINARY! - profile <seconds> <gmon.out>");
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	return ERROR_OK;
}

int target_arch_state(struct target_s *target)
{
	int retval;
	if (target==NULL)
	{
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		LOG_USER("No target has been configured");
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		return ERROR_OK;
	}
	
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	LOG_USER("target state: %s", target_state_strings[target->state]);
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	if (target->state!=TARGET_HALTED)
		return ERROR_OK;
	
	retval=target->type->arch_state(target);
	return retval;
}

/* Single aligned words are guaranteed to use 16 or 32 bit access 
 * mode respectively, otherwise data is handled as quickly as 
 * possible
 */
int target_write_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer)
{
	int retval;
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
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	LOG_DEBUG("writing buffer of %i byte at 0x%8.8x", size, address);
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	if (((address % 2) == 0) && (size == 2))
	{
		return target->type->write_memory(target, address, 2, 1, buffer);
	}
	
	/* handle unaligned head bytes */
	if (address % 4)
	{
		int unaligned = 4 - (address % 4);
		
		if (unaligned > size)
			unaligned = size;

		if ((retval = target->type->write_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
			return retval;
		
		buffer += unaligned;
		address += unaligned;
		size -= unaligned;
	}
		
	/* handle aligned words */
	if (size >= 4)
	{
		int aligned = size - (size % 4);
	
		/* use bulk writes above a certain limit. This may have to be changed */
		if (aligned > 128)
		{
			if ((retval = target->type->bulk_write_memory(target, address, aligned / 4, buffer)) != ERROR_OK)
				return retval;
		}
		else
		{
			if ((retval = target->type->write_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
				return retval;
		}
		
		buffer += aligned;
		address += aligned;
		size -= aligned;
	}
	
	/* handle tail writes of less than 4 bytes */
	if (size > 0)
	{
		if ((retval = target->type->write_memory(target, address, 1, size, buffer)) != ERROR_OK)
			return retval;
	}
	
	return ERROR_OK;
}


/* Single aligned words are guaranteed to use 16 or 32 bit access 
 * mode respectively, otherwise data is handled as quickly as 
 * possible
 */
int target_read_buffer(struct target_s *target, u32 address, u32 size, u8 *buffer)
{
	int retval;
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}

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	LOG_DEBUG("reading buffer of %i byte at 0x%8.8x", size, address);
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	if (((address % 2) == 0) && (size == 2))
	{
		return target->type->read_memory(target, address, 2, 1, buffer);
	}
	
	/* handle unaligned head bytes */
	if (address % 4)
	{
		int unaligned = 4 - (address % 4);
		
		if (unaligned > size)
			unaligned = size;

		if ((retval = target->type->read_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
			return retval;
		
		buffer += unaligned;
		address += unaligned;
		size -= unaligned;
	}
		
	/* handle aligned words */
	if (size >= 4)
	{
		int aligned = size - (size % 4);
	
		if ((retval = target->type->read_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
			return retval;
		
		buffer += aligned;
		address += aligned;
		size -= aligned;
	}
	
	/* handle tail writes of less than 4 bytes */
	if (size > 0)
	{
		if ((retval = target->type->read_memory(target, address, 1, size, buffer)) != ERROR_OK)
			return retval;
	}
	
	return ERROR_OK;
}

int target_checksum_memory(struct target_s *target, u32 address, u32 size, u32* crc)
{
	u8 *buffer;
	int retval;
	int i;
	u32 checksum = 0;
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
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	if ((retval = target->type->checksum_memory(target, address,
		size, &checksum)) == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
	{
		buffer = malloc(size);
		if (buffer == NULL)
		{
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			LOG_ERROR("error allocating buffer for section (%d bytes)", size);
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			return ERROR_INVALID_ARGUMENTS;
		}
		retval = target_read_buffer(target, address, size, buffer);
		if (retval != ERROR_OK)
		{
			free(buffer);
			return retval;
		}

		/* convert to target endianess */
		for (i = 0; i < (size/sizeof(u32)); i++)
		{
			u32 target_data;
			target_data = target_buffer_get_u32(target, &buffer[i*sizeof(u32)]);
			target_buffer_set_u32(target, &buffer[i*sizeof(u32)], target_data);
		}

		retval = image_calculate_checksum( buffer, size, &checksum );
		free(buffer);
	}
	
	*crc = checksum;
	
	return retval;
}
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int target_blank_check_memory(struct target_s *target, u32 address, u32 size, u32* blank)
{
	int retval;
	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
	
	if (target->type->blank_check_memory == 0)
		return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
	
	retval = target->type->blank_check_memory(target, address, size, blank);
			
	return retval;
}
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int target_read_u32(struct target_s *target, u32 address, u32 *value)
{
	u8 value_buf[4];
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
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	int retval = target->type->read_memory(target, address, 4, 1, value_buf);
	
	if (retval == ERROR_OK)
	{
		*value = target_buffer_get_u32(target, value_buf);
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	else
	{
		*value = 0x0;
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		LOG_DEBUG("address: 0x%8.8x failed", address);
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	}
	
	return retval;
}

int target_read_u16(struct target_s *target, u32 address, u16 *value)
{
	u8 value_buf[2];
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}

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	int retval = target->type->read_memory(target, address, 2, 1, value_buf);
	
	if (retval == ERROR_OK)
	{
		*value = target_buffer_get_u16(target, value_buf);
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	}
	else
	{
		*value = 0x0;
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		LOG_DEBUG("address: 0x%8.8x failed", address);
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	}
	
	return retval;
}

int target_read_u8(struct target_s *target, u32 address, u8 *value)
{
	int retval = target->type->read_memory(target, address, 1, 1, value);
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
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	if (retval == ERROR_OK)
	{
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		LOG_DEBUG("address: 0x%8.8x, value: 0x%2.2x", address, *value);
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	}
	else
	{
		*value = 0x0;
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		LOG_DEBUG("address: 0x%8.8x failed", address);
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	}
	
	return retval;
}

int target_write_u32(struct target_s *target, u32 address, u32 value)
{
	int retval;
	u8 value_buf[4];
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}
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	LOG_DEBUG("address: 0x%8.8x, value: 0x%8.8x", address, value);
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	target_buffer_set_u32(target, value_buf, value);	
	if ((retval = target->type->write_memory(target, address, 4, 1, value_buf)) != ERROR_OK)
	{
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		LOG_DEBUG("failed: %i", retval);
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	}
	
	return retval;
}

int target_write_u16(struct target_s *target, u32 address, u16 value)
{
	int retval;
	u8 value_buf[2];
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}

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	LOG_DEBUG("address: 0x%8.8x, value: 0x%8.8x", address, value);
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	target_buffer_set_u16(target, value_buf, value);	
	if ((retval = target->type->write_memory(target, address, 2, 1, value_buf)) != ERROR_OK)
	{
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		LOG_DEBUG("failed: %i", retval);
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	}
	
	return retval;
}

int target_write_u8(struct target_s *target, u32 address, u8 value)
{
	int retval;
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	if (!target->type->examined)
	{
		LOG_ERROR("Target not examined yet");
		return ERROR_FAIL;
	}

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	LOG_DEBUG("address: 0x%8.8x, value: 0x%2.2x", address, value);
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	if ((retval = target->type->read_memory(target, address, 1, 1, &value)) != ERROR_OK)
	{
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		LOG_DEBUG("failed: %i", retval);
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	}
	
	return retval;
}

int target_register_user_commands(struct command_context_s *cmd_ctx)
{
	register_command(cmd_ctx,  NULL, "reg", handle_reg_command, COMMAND_EXEC, NULL);
	register_command(cmd_ctx,  NULL, "poll", handle_poll_command, COMMAND_EXEC, "poll target state");
	register_command(cmd_ctx,  NULL, "wait_halt", handle_wait_halt_command, COMMAND_EXEC, "wait for target halt [time (s)]");
	register_command(cmd_ctx,  NULL, "halt", handle_halt_command, COMMAND_EXEC, "halt target");
	register_command(cmd_ctx,  NULL, "resume", handle_resume_command, COMMAND_EXEC, "resume target [addr]");
	register_command(cmd_ctx,  NULL, "step", handle_step_command, COMMAND_EXEC, "step one instruction from current PC or [addr]");
	register_command(cmd_ctx,  NULL, "reset", handle_reset_command, COMMAND_EXEC, "reset target [run|halt|init|run_and_halt|run_and_init]");
	register_command(cmd_ctx,  NULL, "soft_reset_halt", handle_soft_reset_halt_command, COMMAND_EXEC, "halt the target and do a soft reset");

	register_command(cmd_ctx,  NULL, "mdw", handle_md_command, COMMAND_EXEC, "display memory words <addr> [count]");
	register_command(cmd_ctx,  NULL, "mdh", handle_md_command, COMMAND_EXEC, "display memory half-words <addr> [count]");
	register_command(cmd_ctx,  NULL, "mdb", handle_md_command, COMMAND_EXEC, "display memory bytes <addr> [count]");
	
oharboe's avatar
oharboe committed
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	register_command(cmd_ctx,  NULL, "mww", handle_mw_command, COMMAND_EXEC, "write memory word <addr> <value> [count]");
	register_command(cmd_ctx,  NULL, "mwh", handle_mw_command, COMMAND_EXEC, "write memory half-word <addr> <value> [count]");
	register_command(cmd_ctx,  NULL, "mwb", handle_mw_command, COMMAND_EXEC, "write memory byte <addr> <value> [count]");
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	register_command(cmd_ctx,  NULL, "bp", handle_bp_command, COMMAND_EXEC, "set breakpoint <address> <length> [hw]");	
	register_command(cmd_ctx,  NULL, "rbp", handle_rbp_command, COMMAND_EXEC, "remove breakpoint <adress>");
	register_command(cmd_ctx,  NULL, "wp", handle_wp_command, COMMAND_EXEC, "set watchpoint <address> <length> <r/w/a> [value] [mask]");	
	register_command(cmd_ctx,  NULL, "rwp", handle_rwp_command, COMMAND_EXEC, "remove watchpoint <adress>");
	
	register_command(cmd_ctx,  NULL, "load_image", handle_load_image_command, COMMAND_EXEC, "load_image <file> <address> ['bin'|'ihex'|'elf'|'s19']");
	register_command(cmd_ctx,  NULL, "dump_image", handle_dump_image_command, COMMAND_EXEC, "dump_image <file> <address> <size>");
	register_command(cmd_ctx,  NULL, "verify_image", handle_verify_image_command, COMMAND_EXEC, "verify_image <file> [offset] [type]");
	register_command(cmd_ctx,  NULL, "load_binary", handle_load_image_command, COMMAND_EXEC, "[DEPRECATED] load_binary <file> <address>");
	register_command(cmd_ctx,  NULL, "dump_binary", handle_dump_image_command, COMMAND_EXEC, "[DEPRECATED] dump_binary <file> <address> <size>");
	
	target_request_register_commands(cmd_ctx);
	trace_register_commands(cmd_ctx);
	
	return ERROR_OK;
}

int handle_targets_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target = targets;
	int count = 0;
	
	if (argc == 1)
	{
		int num = strtoul(args[0], NULL, 0);
		
		while (target)
		{
			count++;
			target = target->next;
		}
		
		if (num < count)
			cmd_ctx->current_target = num;
		else
			command_print(cmd_ctx, "%i is out of bounds, only %i targets are configured", num, count);
			
		return ERROR_OK;
	}
		
	while (target)
	{
		command_print(cmd_ctx, "%i: %s (%s), state: %s", count++, target->type->name, target_endianess_strings[target->endianness], target_state_strings[target->state]);
		target = target->next;
	}
	
	return ERROR_OK;
}

int handle_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	int i;
	int found = 0;
	
	if (argc < 3)
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	/* search for the specified target */
	if (args[0] && (args[0][0] != 0))
	{
		for (i = 0; target_types[i]; i++)
		{
			if (strcmp(args[0], target_types[i]->name) == 0)
			{
				target_t **last_target_p = &targets;
				
				/* register target specific commands */
				if (target_types[i]->register_commands(cmd_ctx) != ERROR_OK)
				{
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					LOG_ERROR("couldn't register '%s' commands", args[0]);
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					exit(-1);
				}

				if (*last_target_p)
				{
					while ((*last_target_p)->next)
						last_target_p = &((*last_target_p)->next);
					last_target_p = &((*last_target_p)->next);
				}

				*last_target_p = malloc(sizeof(target_t));
				
				(*last_target_p)->type = target_types[i];
				
				if (strcmp(args[1], "big") == 0)
					(*last_target_p)->endianness = TARGET_BIG_ENDIAN;
				else if (strcmp(args[1], "little") == 0)
					(*last_target_p)->endianness = TARGET_LITTLE_ENDIAN;
				else
				{
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					LOG_ERROR("endianness must be either 'little' or 'big', not '%s'", args[1]);
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					return ERROR_COMMAND_SYNTAX_ERROR;
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				}
				
				/* what to do on a target reset */
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				(*last_target_p)->reset_mode = RESET_INIT; /* default */
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				if (strcmp(args[2], "reset_halt") == 0)
					(*last_target_p)->reset_mode = RESET_HALT;
				else if (strcmp(args[2], "reset_run") == 0)
					(*last_target_p)->reset_mode = RESET_RUN;
				else if (strcmp(args[2], "reset_init") == 0)
					(*last_target_p)->reset_mode = RESET_INIT;
				else if (strcmp(args[2], "run_and_halt") == 0)
					(*last_target_p)->reset_mode = RESET_RUN_AND_HALT;
				else if (strcmp(args[2], "run_and_init") == 0)
					(*last_target_p)->reset_mode = RESET_RUN_AND_INIT;
				else
				{
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					/* Kludge! we want to make this reset arg optional while remaining compatible! */
					args--;
					argc++;
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				}
				(*last_target_p)->run_and_halt_time = 1000; /* default 1s */
				
				(*last_target_p)->reset_script = NULL;
				(*last_target_p)->post_halt_script = NULL;
				(*last_target_p)->pre_resume_script = NULL;
				(*last_target_p)->gdb_program_script = NULL;
				
				(*last_target_p)->working_area = 0x0;
				(*last_target_p)->working_area_size = 0x0;
				(*last_target_p)->working_areas = NULL;
				(*last_target_p)->backup_working_area = 0;
				
				(*last_target_p)->state = TARGET_UNKNOWN;
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				(*last_target_p)->debug_reason = DBG_REASON_UNDEFINED;
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				(*last_target_p)->reg_cache = NULL;
				(*last_target_p)->breakpoints = NULL;
				(*last_target_p)->watchpoints = NULL;
				(*last_target_p)->next = NULL;
				(*last_target_p)->arch_info = NULL;
				
				/* initialize trace information */
				(*last_target_p)->trace_info = malloc(sizeof(trace_t));
				(*last_target_p)->trace_info->num_trace_points = 0;
				(*last_target_p)->trace_info->trace_points_size = 0;
				(*last_target_p)->trace_info->trace_points = NULL;
				(*last_target_p)->trace_info->trace_history_size = 0;
				(*last_target_p)->trace_info->trace_history = NULL;
				(*last_target_p)->trace_info->trace_history_pos = 0;
				(*last_target_p)->trace_info->trace_history_overflowed = 0;
				
				(*last_target_p)->dbgmsg = NULL;
				(*last_target_p)->dbg_msg_enabled = 0;
								
				(*last_target_p)->type->target_command(cmd_ctx, cmd, args, argc, *last_target_p);
				
				found = 1;
				break;
			}
		}
	}
	
	/* no matching target found */
	if (!found)
	{
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		LOG_ERROR("target '%s' not found", args[0]);
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}

	return ERROR_OK;
}

/* usage: target_script <target#> <event> <script_file> */
int handle_target_script_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target = NULL;
	
	if (argc < 3)
	{
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		LOG_ERROR("incomplete target_script command");
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	target = get_target_by_num(strtoul(args[0], NULL, 0));
	
	if (!target)
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	if (strcmp(args[1], "reset") == 0)
	{
		if (target->reset_script)
			free(target->reset_script);
		target->reset_script = strdup(args[2]);
	}
	else if (strcmp(args[1], "post_halt") == 0)
	{
		if (target->post_halt_script)
			free(target->post_halt_script);
		target->post_halt_script = strdup(args[2]);
	}
	else if (strcmp(args[1], "pre_resume") == 0)
	{
		if (target->pre_resume_script)
			free(target->pre_resume_script);
		target->pre_resume_script = strdup(args[2]);
	}
	else if (strcmp(args[1], "gdb_program_config") == 0)
	{
		if (target->gdb_program_script)
			free(target->gdb_program_script);
		target->gdb_program_script = strdup(args[2]);
	}
	else
	{
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		LOG_ERROR("unknown event type: '%s", args[1]);
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	return ERROR_OK;
}

int handle_run_and_halt_time_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target = NULL;
	
	if (argc < 2)
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	target = get_target_by_num(strtoul(args[0], NULL, 0));
	if (!target)
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	
	target->run_and_halt_time = strtoul(args[1], NULL, 0);
	
	return ERROR_OK;
}

int handle_working_area_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target = NULL;
	
	if ((argc < 4) || (argc > 5))
	{
		return ERROR_COMMAND_SYNTAX_ERROR;
	}
	
	target = get_target_by_num(strtoul(args[0], NULL, 0));
	if (!target)
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
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	}
	target_free_all_working_areas(target);
	
	target->working_area_phys = target->working_area_virt = strtoul(args[1], NULL, 0);
	if (argc == 5)
	{
		target->working_area_virt = strtoul(args[4], NULL, 0);
	}
	target->working_area_size = strtoul(args[2], NULL, 0);
	
	if (strcmp(args[3], "backup") == 0)
	{
		target->backup_working_area = 1;
	}
	else if (strcmp(args[3], "nobackup") == 0)
	{
		target->backup_working_area = 0;
	}
	else
	{
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		return ERROR_COMMAND_SYNTAX_ERROR;
	}
	
	return ERROR_OK;
}


/* process target state changes */
int handle_target(void *priv)
{
	target_t *target = targets;
	
	while (target)
	{
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		{
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			/* polling may fail silently until the target has been examined */
			target_poll(target);
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		}
	
		target = target->next;
	}
	
	return ERROR_OK;
}

int handle_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target;
	reg_t *reg = NULL;
	int count = 0;
	char *value;
	
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	LOG_DEBUG("-");
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	target = get_current_target(cmd_ctx);
	
	/* list all available registers for the current target */
	if (argc == 0)
	{
		reg_cache_t *cache = target->reg_cache;
		
		count = 0;
		while(cache)
		{
			int i;
			for (i = 0; i < cache->num_regs; i++)
			{
				value = buf_to_str(cache->reg_list[i].value, cache->reg_list[i].size, 16);
				command_print(cmd_ctx, "(%i) %s (/%i): 0x%s (dirty: %i, valid: %i)", count++, cache->reg_list[i].name, cache->reg_list[i].size, value, cache->reg_list[i].dirty, cache->reg_list[i].valid);
				free(value);
			}
			cache = cache->next;
		}
		
		return ERROR_OK;
	}
	
	/* access a single register by its ordinal number */
	if ((args[0][0] >= '0') && (args[0][0] <= '9'))
	{
		int num = strtoul(args[0], NULL, 0);
		reg_cache_t *cache = target->reg_cache;
		
		count = 0;
		while(cache)
		{
			int i;
			for (i = 0; i < cache->num_regs; i++)
			{
				if (count++ == num)
				{
					reg = &cache->reg_list[i];
					break;
				}
			}
			if (reg)
				break;
			cache = cache->next;
		}
		
		if (!reg)
		{
			command_print(cmd_ctx, "%i is out of bounds, the current target has only %i registers (0 - %i)", num, count, count - 1);
			return ERROR_OK;
		}
	} else /* access a single register by its name */
	{
		reg = register_get_by_name(target->reg_cache, args[0], 1);
		
		if (!reg)
		{
			command_print(cmd_ctx, "register %s not found in current target", args[0]);
			return ERROR_OK;
		}
	}

	/* display a register */
	if ((argc == 1) || ((argc == 2) && !((args[1][0] >= '0') && (args[1][0] <= '9'))))
	{
		if ((argc == 2) && (strcmp(args[1], "force") == 0))
			reg->valid = 0;
		
		if (reg->valid == 0)
		{
			reg_arch_type_t *arch_type = register_get_arch_type(reg->arch_type);
			if (arch_type == NULL)
			{
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				return ERROR_OK;
			}
			arch_type->get(reg);
		}
		value = buf_to_str(reg->value, reg->size, 16);
		command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, reg->size, value);
		free(value);
		return ERROR_OK;
	}
	
	/* set register value */
	if (argc == 2)
	{
		u8 *buf = malloc(CEIL(reg->size, 8));
		str_to_buf(args[1], strlen(args[1]), buf, reg->size, 0);

		reg_arch_type_t *arch_type = register_get_arch_type(reg->arch_type);
		if (arch_type == NULL)
		{
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			return ERROR_OK;
		}
		
		arch_type->set(reg, buf);
		
		value = buf_to_str(reg->value, reg->size, 16);
		command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, reg->size, value);
		free(value);
		
		free(buf);
		
		return ERROR_OK;
	}
	
	command_print(cmd_ctx, "usage: reg <#|name> [value]");
	
	return ERROR_OK;
}

static int wait_state(struct command_context_s *cmd_ctx, char *cmd, enum target_state state, int ms);

int handle_poll_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	target_t *target = get_current_target(cmd_ctx);

	if (argc == 0)
	{
1734
		target_poll(target);
1735
		target_arch_state(target);
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
	}
	else
	{
		if (strcmp(args[0], "on") == 0)
		{
			target_continous_poll = 1;
		}
		else if (strcmp(args[0], "off") == 0)
		{
			target_continous_poll = 0;
		}
		else
		{
			command_print(cmd_ctx, "arg is \"on\" or \"off\"");
		}
	}
	
	
	return ERROR_OK;
}

int handle_wait_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	int ms = 5000;
	
	if (argc > 0)
	{
		char *end;

		ms = strtoul(args[0], &end, 0) * 1000;
		if (*end)
		{
			command_print(cmd_ctx, "usage: %s [seconds]", cmd);
			return ERROR_OK;
		}
	}

	return wait_state(cmd_ctx, cmd, TARGET_HALTED, ms); 
}

static void target_process_events(struct command_context_s *cmd_ctx)
{
	target_t *target = get_current_target(cmd_ctx);
1779
	target_poll(target);
1780
	target_call_timer_callbacks_now();
1781
1782
1783
1784
1785
1786
}

static int wait_state(struct command_context_s *cmd_ctx, char *cmd, enum target_state state, int ms)
{
	int retval;
	struct timeval timeout, now;
1787
	int once=1;
1788
1789
1790
1791
1792
1793
	gettimeofday(&timeout, NULL);
	timeval_add_time(&timeout, 0, ms * 1000);
	
	target_t *target = get_current_target(cmd_ctx);
	for (;;)
	{
1794
		if ((retval=target_poll(target))!=ERROR_OK)
1795
			return retval;
1796
		target_call_timer_callbacks_now();
1797
1798
1799
1800
		if (target->state == state)
		{
			break;
		}
1801
1802
1803
1804
1805
		if (once)
		{
			once=0;
			command_print(cmd_ctx, "waiting for target %s...", target_state_strings[state]);
		}
1806
1807
1808
1809
		
		gettimeofday(&now, NULL);
		if ((now.tv_sec > timeout.tv_sec) || ((now.tv_sec == timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec)))
		{
1810
			LOG_ERROR("timed out while waiting for target %s", target_state_strings[state]);
1811
1812
1813
1814
1815
1816
1817
1818
1819
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1822
			break;
		}
	}
	
	return ERROR_OK;
}

int handle_halt_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
	int retval;
	target_t *target = get_current_target(cmd_ctx);

1823
	LOG_DEBUG("-");
1824

<