path: root/src/target/arm926ejs.c

/***************************************************************************
 *   Copyright (C) 2007 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 "arm926ejs.h"
#include "time_support.h"
#include "target_type.h"


#if 0
#define _DEBUG_INSTRUCTION_EXECUTION_
#endif

/* cli handling */
int arm926ejs_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_cp15i_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_virt2phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_cache_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_md_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_mw_phys_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

int arm926ejs_handle_read_cache_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int arm926ejs_handle_read_mmu_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);

/* forward declarations */
int arm926ejs_target_create(struct target_s *target, Jim_Interp *interp);
int arm926ejs_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
int arm926ejs_quit(void);
int arm926ejs_read_memory(struct target_s *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);

static int arm926ejs_virt2phys(struct target_s *target, uint32_t virtual, uint32_t *physical);
static int arm926ejs_mmu(struct target_s *target, int *enabled);

target_type_t arm926ejs_target =
{
	.name = "arm926ejs",

	.poll = arm7_9_poll,
	.arch_state = arm926ejs_arch_state,

	.target_request_data = arm7_9_target_request_data,

	.halt = arm7_9_halt,
	.resume = arm7_9_resume,
	.step = arm7_9_step,

	.assert_reset = arm7_9_assert_reset,
	.deassert_reset = arm7_9_deassert_reset,
	.soft_reset_halt = arm926ejs_soft_reset_halt,

	.get_gdb_reg_list = armv4_5_get_gdb_reg_list,

	.read_memory = arm7_9_read_memory,
	.write_memory = arm926ejs_write_memory,
	.bulk_write_memory = arm7_9_bulk_write_memory,
	.checksum_memory = arm7_9_checksum_memory,
	.blank_check_memory = arm7_9_blank_check_memory,

	.run_algorithm = armv4_5_run_algorithm,

	.add_breakpoint = arm7_9_add_breakpoint,
	.remove_breakpoint = arm7_9_remove_breakpoint,
	.add_watchpoint = arm7_9_add_watchpoint,
	.remove_watchpoint = arm7_9_remove_watchpoint,

	.register_commands = arm926ejs_register_commands,
	.target_create = arm926ejs_target_create,
	.init_target = arm926ejs_init_target,
	.examine = arm9tdmi_examine,
	.quit = arm926ejs_quit,
	.virt2phys = arm926ejs_virt2phys,
	.mmu = arm926ejs_mmu
};

int arm926ejs_catch_broken_irscan(uint8_t *captured, void *priv, scan_field_t *field)
{
	/* FIX!!!! this code should be reenabled. For now it does not check
	 * the queue...*/
	return 0;
#if 0
	/* The ARM926EJ-S' instruction register is 4 bits wide */
	uint8_t t = *captured & 0xf;
	uint8_t t2 = *field->in_check_value & 0xf;
	if (t == t2)
	{
		return ERROR_OK;
	}
	else if ((t == 0x0f) || (t == 0x00))
	{
		LOG_DEBUG("caught ARM926EJ-S invalid Capture-IR result after CP15 access");
		return ERROR_OK;
	}
	return ERROR_JTAG_QUEUE_FAILED;;
#endif
}

#define ARM926EJS_CP15_ADDR(opcode_1, opcode_2, CRn, CRm) ((opcode_1 << 11) | (opcode_2 << 8) | (CRn << 4) | (CRm << 0))

int arm926ejs_cp15_read(target_t *target, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
{
	int retval = ERROR_OK;
	armv4_5_common_t *armv4_5 = target->arch_info;
	arm7_9_common_t *arm7_9 = armv4_5->arch_info;
	arm_jtag_t *jtag_info = &arm7_9->jtag_info;
	uint32_t address = ARM926EJS_CP15_ADDR(op1, op2, CRn, CRm);
	scan_field_t fields[4];
	uint8_t address_buf[2];
	uint8_t nr_w_buf = 0;
	uint8_t