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openocd/src/target/embeddedice.c

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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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 "embeddedice.h"
#if 0
static bitfield_desc_t embeddedice_comms_ctrl_bitfield_desc[] =
{
{"R", 1},
{"W", 1},
{"reserved", 26},
{"version", 4}
};
#endif
static int embeddedice_reg_arch_info[] =
{
0x0, 0x1, 0x4, 0x5,
0x8, 0x9, 0xa, 0xb, 0xc, 0xd,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
0x2
};
static 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",
"vector catch"
};
static int embeddedice_reg_arch_type = -1;
static int embeddedice_get_reg(reg_t *reg);
reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm7_9_common_t *arm7_9)
{
int retval;
reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
reg_t *reg_list = NULL;
embeddedice_reg_t *arch_info = NULL;
arm_jtag_t *jtag_info = &arm7_9->jtag_info;
int num_regs;
int i;
int eice_version = 0;
/* 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);
if (arm7_9->has_vector_catch)
num_regs = 17;
else
num_regs = 16;
/* 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; 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;
}
/* identify EmbeddedICE version by reading DCC control register */
embeddedice_read_reg(&reg_list[EICE_COMMS_CTRL]);
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
for (i = 0; i < num_regs; i++)
{
free(reg_list[i].value);
}
free(reg_list);
free(arch_info);
return NULL;
}
eice_version = buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 28, 4);
switch (eice_version)
{
case 1:
reg_list[EICE_DBG_CTRL].size = 3;
reg_list[EICE_DBG_STAT].size = 5;
break;
case 2:
reg_list[EICE_DBG_CTRL].size = 4;
reg_list[EICE_DBG_STAT].size = 5;
arm7_9->has_single_step = 1;
break;
case 3:
LOG_ERROR("EmbeddedICE version 3 detected, EmbeddedICE handling might be broken");
reg_list[EICE_DBG_CTRL].size = 6;
reg_list[EICE_DBG_STAT].size = 5;
arm7_9->has_single_step = 1;
arm7_9->has_monitor_mode = 1;
break;
case 4:
reg_list[EICE_DBG_CTRL].size = 6;
reg_list[EICE_DBG_STAT].size = 5;
arm7_9->has_monitor_mode = 1;
break;
case 5:
reg_list[EICE_DBG_CTRL].size = 6;
reg_list[EICE_DBG_STAT].size = 5;
arm7_9->has_single_step = 1;
arm7_9->has_monitor_mode = 1;
break;
case 6:
reg_list[EICE_DBG_CTRL].size = 6;
reg_list[EICE_DBG_STAT].size = 10;
arm7_9->has_monitor_mode = 1;
break;
case 7:
LOG_WARNING("EmbeddedICE version 7 detected, EmbeddedICE handling might be broken");
reg_list[EICE_DBG_CTRL].size = 6;
reg_list[EICE_DBG_STAT].size = 5;
arm7_9->has_monitor_mode = 1;
break;
default:
/*
* The Feroceon implementation has the version number
* in some unusual bits. Let feroceon.c validate it
* and do the appropriate setup itself.
*/
if (strcmp(target_get_name(target), "feroceon") == 0)
break;
LOG_ERROR("unknown EmbeddedICE version (comms ctrl: 0x%8.8" PRIx32 ")", buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 0, 32));
}
return reg_cache;
}
int embeddedice_setup(target_t *target)
{
int retval;
armv4_5_common_t *armv4_5 = target->arch_info;
arm7_9_common_t *arm7_9 = armv4_5->arch_info;
/* explicitly disable monitor mode */
if (arm7_9->has_monitor_mode)
{
reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
embeddedice_read_reg(dbg_ctrl);
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
buf_set_u32(dbg_ctrl->value, 4, 1, 0);
embeddedice_set_reg_w_exec(dbg_ctrl, dbg_ctrl->value);
}
return jtag_execute_queue();
}
static int embeddedice_get_reg(reg_t *reg)
{
int retval;
if ((retval = embeddedice_read_reg(reg)) != ERROR_OK)
{
LOG_ERROR("BUG: error scheduling EmbeddedICE register read");
return retval;
}
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("register read failed");
return retval;
}
return ERROR_OK;
}
int embeddedice_read_reg_w_check(reg_t *reg, uint8_t* check_value, uint8_t* check_mask)
{
embeddedice_reg_t *ice_reg = reg->arch_info;
uint8_t reg_addr = ice_reg->addr & 0x1f;
scan_field_t fields[3];
uint8_t field1_out[1];
uint8_t field2_out[1];
jtag_set_end_state(TAP_IDLE);
arm_jtag_scann(ice_reg->jtag_info, 0x2);
arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
fields[0].tap = ice_reg->jtag_info->tap;
fields[0].num_bits = 32;
fields[0].out_value = reg->value;
fields[0].in_value = NULL;
fields[0].check_value = NULL;
fields[0].check_mask = NULL;
fields[1].tap = ice_reg->jtag_info->tap;
fields[1].num_bits = 5;
fields[1].out_value = field1_out;
buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
fields[1].in_value = NULL;
fields[1].check_value = NULL;
fields[1].check_mask = NULL;
fields[2].tap = ice_reg->jtag_info->tap;
fields[2].num_bits = 1;
fields[2].out_value = field2_out;
buf_set_u32(fields[2].out_value, 0, 1, 0);
fields[2].in_value = NULL;
fields[2].check_value = NULL;
fields[2].check_mask = NULL;
jtag_add_dr_scan(3, fields, jtag_get_end_state());
fields[0].in_value = reg->value;
fields[0].check_value = check_value;
fields[0].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_check(3, fields, jtag_get_end_state());
return ERROR_OK;
}
/* receive <size> words of 32 bit from the DCC
* we pretend the target is always going to be fast enough
* (relative to the JTAG clock), so we don't need to handshake
*/
int embeddedice_receive(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size)
{
scan_field_t fields[3];
uint8_t field1_out[1];
uint8_t field2_out[1];
jtag_set_end_state(TAP_IDLE);
arm_jtag_scann(jtag_info, 0x2);
arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
fields[0].tap = jtag_info->tap;
fields[0].num_bits = 32;
fields[0].out_value = NULL;
fields[0].in_value = NULL;
fields[1].tap = jtag_info->tap;
fields[1].num_bits = 5;
fields[1].out_value = field1_out;
buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
fields[1].in_value = NULL;
fields[2].tap = jtag_info->tap;
fields[2].num_bits = 1;
fields[2].out_value = field2_out;
buf_set_u32(fields[2].out_value, 0, 1, 0);
fields[2].in_value = NULL;
jtag_add_dr_scan(3, fields, jtag_get_end_state());
while (size > 0)
{
/* when reading the last item, set the register address to the DCC control reg,
* to avoid reading additional data from the DCC data reg
*/
if (size == 1)
buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
fields[0].in_value = (uint8_t *)data;
jtag_add_dr_scan(3, fields, jtag_get_end_state());
jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)data);
data++;
size--;
}
return jtag_execute_queue();
}
int embeddedice_read_reg(reg_t *reg)
{
return embeddedice_read_reg_w_check(reg, NULL, NULL);
}
void embeddedice_set_reg(reg_t *reg, uint32_t value)
{
embeddedice_write_reg(reg, value);
buf_set_u32(reg->value, 0, reg->size, value);
reg->valid = 1;
reg->dirty = 0;
}
int embeddedice_set_reg_w_exec(reg_t *reg, uint8_t *buf)
{
int retval;
embeddedice_set_reg(reg, buf_get_u32(buf, 0, reg->size));
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("register write failed");
return retval;
}
return ERROR_OK;
}
void embeddedice_write_reg(reg_t *reg, uint32_t value)
{
embeddedice_reg_t *ice_reg = reg->arch_info;
LOG_DEBUG("%i: 0x%8.8" PRIx32 "", ice_reg->addr, value);
jtag_set_end_state(TAP_IDLE);
arm_jtag_scann(ice_reg->jtag_info, 0x2);
arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
uint8_t reg_addr = ice_reg->addr & 0x1f;
embeddedice_write_reg_inner(ice_reg->jtag_info->tap, reg_addr, value);
}
void embeddedice_store_reg(reg_t *reg)
{
embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
}
/* send <size> words of 32 bit to the DCC
* we pretend the target is always going to be fast enough
* (relative to the JTAG clock), so we don't need to handshake
*/
int embeddedice_send(arm_jtag_t *jtag_info, uint32_t *data, uint32_t size)
{
scan_field_t fields[3];
uint8_t field0_out[4];
uint8_t field1_out[1];
uint8_t field2_out[1];
jtag_set_end_state(TAP_IDLE);
arm_jtag_scann(jtag_info, 0x2);
arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
fields[0].tap = jtag_info->tap;
fields[0].num_bits = 32;
fields[0].out_value = field0_out;
fields[0].in_value = NULL;
fields[1].tap = jtag_info->tap;
fields[1].num_bits = 5;
fields[1].out_value = field1_out;
buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
fields[1].in_value = NULL;
fields[2].tap = jtag_info->tap;
fields[2].num_bits = 1;
fields[2].out_value = field2_out;
buf_set_u32(fields[2].out_value, 0, 1, 1);
fields[2].in_value = NULL;
while (size > 0)
{
buf_set_u32(fields[0].out_value, 0, 32, *data);
jtag_add_dr_scan(3, fields, jtag_get_end_state());
data++;
size--;
}
/* call to jtag_execute_queue() intentionally omitted */
return ERROR_OK;
}
/* wait for DCC control register R/W handshake bit to become active
*/
int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, uint32_t timeout)
{
scan_field_t fields[3];
uint8_t field0_in[4];
uint8_t field1_out[1];
uint8_t field2_out[1];
int retval;
uint32_t hsact;
struct timeval lap;
struct timeval now;
if (hsbit == EICE_COMM_CTRL_WBIT)
hsact = 1;
else if (hsbit == EICE_COMM_CTRL_RBIT)
hsact = 0;
else
return ERROR_INVALID_ARGUMENTS;
jtag_set_end_state(TAP_IDLE);
arm_jtag_scann(jtag_info, 0x2);
arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
fields[0].tap = jtag_info->tap;
fields[0].num_bits = 32;
fields[0].out_value = NULL;
fields[0].in_value = field0_in;
fields[1].tap = jtag_info->tap;
fields[1].num_bits = 5;
fields[1].out_value = field1_out;
buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
fields[1].in_value = NULL;
fields[2].tap = jtag_info->tap;
fields[2].num_bits = 1;
fields[2].out_value = field2_out;
buf_set_u32(fields[2].out_value, 0, 1, 0);
fields[2].in_value = NULL;
jtag_add_dr_scan(3, fields, jtag_get_end_state());
gettimeofday(&lap, NULL);
do
{
jtag_add_dr_scan(3, fields, jtag_get_end_state());
if ((retval = jtag_execute_queue()) != ERROR_OK)
return retval;
if (buf_get_u32(field0_in, hsbit, 1) == hsact)
return ERROR_OK;
gettimeofday(&now, NULL);
}
while ((uint32_t)((now.tv_sec-lap.tv_sec)*1000 + (now.tv_usec-lap.tv_usec)/1000) <= timeout);
return ERROR_TARGET_TIMEOUT;
}
#ifndef HAVE_JTAG_MINIDRIVER_H
/* this is the inner loop of the open loop DCC write of data to target */
void embeddedice_write_dcc(jtag_tap_t *tap, int reg_addr, uint8_t *buffer, int little, int count)
{
int i;
for (i = 0; i < count; i++)
{
embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));
buffer += 4;
}
}
#else
/* provided by minidriver */
#endif
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