path: root/src/target/mips32.c

/***************************************************************************
 *   Copyright (C) 2008 by Spencer Oliver                                  *
 *   spen@spen-soft.co.uk                                                  *
 *                                                                         *
 *   Copyright (C) 2008 by David T.L. Wong                                 *
 *                                                                         *
 *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 *                                                                         *
 *   Copyright (C) 2011 by Drasko DRASKOVIC                                *
 *   drasko.draskovic@gmail.com                                            *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "mips32.h"
#include "breakpoints.h"
#include "algorithm.h"
#include "register.h"

static char *mips32_core_reg_list[] = {
	"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
	"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
	"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
	"t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra",
	"status", "lo", "hi", "badvaddr", "cause", "pc"
};

static const char *mips_isa_strings[] = {
	"MIPS32", "MIPS16e"
};

static struct mips32_core_reg mips32_core_reg_list_arch_info[MIPS32NUMCOREREGS] = {
	{0, NULL, NULL},
	{1, NULL, NULL},
	{2, NULL, NULL},
	{3, NULL, NULL},
	{4, NULL, NULL},
	{5, NULL, NULL},
	{6, NULL, NULL},
	{7, NULL, NULL},
	{8, NULL, NULL},
	{9, NULL, NULL},
	{10, NULL, NULL},
	{11, NULL, NULL},
	{12, NULL, NULL},
	{13, NULL, NULL},
	{14, NULL, NULL},
	{15, NULL, NULL},
	{16, NULL, NULL},
	{17, NULL, NULL},
	{18, NULL, NULL},
	{19, NULL, NULL},
	{20, NULL, NULL},
	{21, NULL, NULL},
	{22, NULL, NULL},
	{23, NULL, NULL},
	{24, NULL, NULL},
	{25, NULL, NULL},
	{26, NULL, NULL},
	{27, NULL, NULL},
	{28, NULL, NULL},
	{29, NULL, NULL},
	{30, NULL, NULL},
	{31, NULL, NULL},

	{32, NULL, NULL},
	{33, NULL, NULL},
	{34, NULL, NULL},
	{35, NULL, NULL},
	{36, NULL, NULL},
	{37, NULL, NULL},
};

/* number of mips dummy fp regs fp0 - fp31 + fsr and fir
 * we also add 18 unknown registers to handle gdb requests */

#define MIPS32NUMFPREGS (34 + 18)

static uint8_t mips32_gdb_dummy_fp_value[] = {0, 0, 0, 0};

static struct reg mips32_gdb_dummy_fp_reg = {
	.name = "GDB dummy floating-point register",
	.value = mips32_gdb_dummy_fp_value,
	.dirty = 0,
	.valid = 1,
	.size = 32,
	.arch_info = NULL,
};

static int mips32_get_core_reg(struct reg *reg)
{
	int retval;
	struct mips32_core_reg *mips32_reg = reg->arch_info;
	struct target *target = mips32_reg->target;
	struct mips32_common *mips32_target = target_to_mips32(target);

	if (target->state != TARGET_HALTED)
		return ERROR_TARGET_NOT_HALTED;

	retval = mips32_target->read_core_reg(target, mips32_reg->num);

	return retval;
}

static int mips32_set_core_reg(struct reg *reg, uint8_t *buf)
{
	struct mips32_core_reg *mips32_reg = reg->arch_info;
	struct target *target = mips32_reg->target;
	uint32_t value = buf_get_u32(buf, 0, 32);

	if (target->state != TARGET_HALTED)
		return ERROR_TARGET_NOT_HALTED;

	buf_set_u32(reg->value, 0, 32, value);
	reg->dirty = 1;
	reg->valid = 1;

	return ERROR_OK;
}

static int mips32_read_core_reg(struct target *target, int num)
{
	uint32_t reg_value;

	/* get pointers to arch-specific information */
	struct mips32_common *mips32 = target_to_mips32(target);

	if ((num < 0) || (num >= MIPS32NUMCOREREGS))
		return ERROR_COMMAND_SYNTAX_ERROR;

	reg_value = mips32->core_regs[