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openocd/src/target/embeddedice.c

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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. *
***************************************************************************/
#include "config.h"
#include "embeddedice.h"
#include "armv4_5.h"
#include "arm7_9_common.h"
#include "log.h"
#include "arm_jtag.h"
#include "types.h"
#include "binarybuffer.h"
#include "target.h"
#include "register.h"
#include "jtag.h"
#include <stdlib.h>
bitfield_desc_t embeddedice_comms_ctrl_bitfield_desc[] =
{
{"R", 1},
{"W", 1},
{"reserved", 26},
{"version", 4}
};
int embeddedice_reg_arch_info[] =
{
0x0, 0x1, 0x4, 0x5,
0x8, 0x9, 0xa, 0xb, 0xc, 0xd,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15
};
char* embeddedice_reg_list[] =
{
"debug_ctrl",
"debug_status",
"comms_ctrl",
"comms_data",
"watch 0 addr value",
"watch 0 addr mask",
"watch 0 data value",
"watch 0 data mask",
"watch 0 control value",
"watch 0 control mask",
"watch 1 addr value",
"watch 1 addr mask",
"watch 1 data value",
"watch 1 data mask",
"watch 1 control value",
"watch 1 control mask"
};
int embeddedice_reg_arch_type = -1;
int embeddedice_get_reg(reg_t *reg);
int embeddedice_set_reg(reg_t *reg, u32 value);
int embeddedice_write_reg(reg_t *reg, u32 value);
int embeddedice_read_reg(reg_t *reg);
reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm_jtag_t *jtag_info, int extra_reg)
{
reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
reg_t *reg_list = NULL;
embeddedice_reg_t *arch_info = NULL;
int num_regs = 16 + extra_reg;
int i;
/* register a register arch-type for EmbeddedICE registers only once */
if (embeddedice_reg_arch_type == -1)
embeddedice_reg_arch_type = register_reg_arch_type(embeddedice_get_reg, embeddedice_set_reg_w_exec);
/* the actual registers are kept in two arrays */
reg_list = calloc(num_regs, sizeof(reg_t));
arch_info = calloc(num_regs, sizeof(embeddedice_reg_t));
/* fill in values for the reg cache */
reg_cache->name = "EmbeddedICE registers";
reg_cache->next = NULL;
reg_cache->reg_list = reg_list;
reg_cache->num_regs = num_regs;
/* set up registers */
for (i = 0; i < num_regs - extra_reg; i++)
{
reg_list[i].name = embeddedice_reg_list[i];
reg_list[i].size = 32;
reg_list[i].dirty = 0;
reg_list[i].valid = 0;
reg_list[i].bitfield_desc = NULL;
reg_list[i].num_bitfields = 0;
reg_list[i].value = calloc(1, 4);
reg_list[i].arch_info = &arch_info[i];
reg_list[i].arch_type = embeddedice_reg_arch_type;
arch_info[i].addr = embeddedice_reg_arch_info[i];
arch_info[i].jtag_info = jtag_info;
}
/* there may be one extra reg (Abort status (ARM7 rev4) or Vector catch (ARM9)) */
if (extra_reg)
{
reg_list[num_regs - 1].arch_info = &arch_info[num_regs - 1];
arch_info[num_regs - 1].jtag_info = jtag_info;
}
return reg_cache;
}
int embeddedice_get_reg(reg_t *reg)
{
if (embeddedice_read_reg(reg) != ERROR_OK)
{
ERROR("BUG: error scheduling EmbeddedICE register read");
exit(-1);
}
if (jtag_execute_queue() != ERROR_OK)
{
ERROR("register read failed");
}
return ERROR_OK;
}
int embeddedice_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
{
embeddedice_reg_t *ice_reg = reg->arch_info;
u8 reg_addr = ice_reg->addr & 0x1f;
scan_field_t fields[3];
DEBUG("%i", ice_reg->addr);
jtag_add_end_state(TAP_RTI);
arm_jtag_scann(ice_reg->jtag_info, 0x2);
arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr);
fields[0].device = ice_reg->jtag_info->chain_pos;
fields[0].num_bits = 32;
fields[0].out_value = reg->value;
fields[0].out_mask = NULL;
fields[0].in_value = NULL;
fields[0].in_check_value = NULL;
fields[0].in_check_mask = NULL;
fields[0].in_handler = NULL;
fields[0].in_handler_priv = NULL;
fields[1].device = ice_reg->jtag_info->chain_pos;
fields[1].num_bits = 5;
fields[1].out_value = malloc(1);
buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
fields[1].out_mask = NULL;
fields[1].in_value = NULL;
fields[1].in_check_value = NULL;
fields[1].in_check_mask = NULL;
fields[1].in_handler = NULL;
fields[1].in_handler_priv = NULL;
fields[2].device = ice_reg->jtag_info->chain_pos;
fields[2].num_bits = 1;
fields[2].out_value = malloc(1);
buf_set_u32(fields[2].out_value, 0, 1, 0);
fields[2].out_mask = NULL;
fields[2].in_value = NULL;
fields[2].in_check_value = NULL;
fields[2].in_check_mask = NULL;
fields[2].in_handler = NULL;
fields[2].in_handler_priv = NULL;
jtag_add_dr_scan(3, fields, -1);
fields[0].in_value = reg->value;
fields[0].in_check_value = check_value;
fields[0].in_check_mask = check_mask;
/* when reading the DCC data register, leaving the address field set to
* EICE_COMMS_DATA would read the register twice
* reading the control register is safe
*/
buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
jtag_add_dr_scan(3, fields, -1);
free(fields[1].out_value);
free(fields[2].out_value);
return ERROR_OK;
}
int embeddedice_read_reg(reg_t *reg)
{
return embeddedice_read_reg_w_check(reg, NULL, NULL);
}
int embeddedice_set_reg(reg_t *reg, u32 value)
{
if (embeddedice_write_reg(reg, value) != ERROR_OK)
{
ERROR("BUG: error scheduling EmbeddedICE register write");
exit(-1);
}
buf_set_u32(reg->value, 0, reg->size, value);
reg->valid = 1;
reg->dirty = 0;
return ERROR_OK;
}
int embeddedice_set_reg_w_exec(reg_t *reg, u32 value)
{
embeddedice_set_reg(reg, value);
if (jtag_execute_queue() != ERROR_OK)
{
ERROR("register write failed");
exit(-1);
}
return ERROR_OK;
}
int embeddedice_write_reg(reg_t *reg, u32 value)
{
embeddedice_reg_t *ice_reg = reg->arch_info;
u8 reg_addr = ice_reg->addr & 0x1f;
scan_field_t fields[3];
DEBUG("%i: 0x%8.8x", ice_reg->addr, value);
jtag_add_end_state(TAP_RTI);
arm_jtag_scann(ice_reg->jtag_info, 0x2);
arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr);
fields[0].device = ice_reg->jtag_info->chain_pos;
fields[0].num_bits = 32;
fields[0].out_value = malloc(4);
buf_set_u32(fields[0].out_value, 0, 32, value);
fields[0].out_mask = NULL;
fields[0].in_value = NULL;
fields[0].in_check_value = NULL;
fields[0].in_check_mask = NULL;
fields[0].in_handler = NULL;
fields[0].in_handler_priv = NULL;
fields[1].device = ice_reg->jtag_info->chain_pos;
fields[1].num_bits = 5;
fields[1].out_value = malloc(1);
buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
fields[1].out_mask = NULL;
fields[1].in_value = NULL;
fields[1].in_check_value = NULL;
fields[1].in_check_mask = NULL;
fields[1].in_handler = NULL;
fields[1].in_handler_priv = NULL;
fields[2].device = ice_reg->jtag_info->chain_pos;
fields[2].num_bits = 1;
fields[2].out_value = malloc(1);
buf_set_u32(fields[2].out_value, 0, 1, 1);
fields[2].out_mask = NULL;
fields[2].in_value = NULL;
fields[2].in_check_value = NULL;
fields[2].in_check_mask = NULL;
fields[2].in_handler = NULL;
fields[2].in_handler_priv = NULL;
jtag_add_dr_scan(3, fields, -1);
free(fields[0].out_value);
free(fields[1].out_value);
free(fields[2].out_value);
return ERROR_OK;
}
int embeddedice_store_reg(reg_t *reg)
{
return embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
}
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