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riscv-openocd/src/target/target_request.c

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/***************************************************************************
* Copyright (C) 2007 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 <helper/log.h>
#include <helper/binarybuffer.h>
#include "target.h"
#include "target_request.h"
#include "target_type.h"
#include "trace.h"
static int charmsg_mode = 0;
static int target_asciimsg(struct target *target, uint32_t length)
{
char *msg = malloc(DIV_ROUND_UP(length + 1, 4) * 4);
struct debug_msg_receiver *c = target->dbgmsg;
target->type->target_request_data(target, DIV_ROUND_UP(length, 4), (uint8_t*)msg);
msg[length] = 0;
LOG_DEBUG("%s", msg);
while (c)
{
command_print(c->cmd_ctx, "%s", msg);
c = c->next;
}
return ERROR_OK;
}
static int target_charmsg(struct target *target, uint8_t msg)
{
LOG_USER_N("%c", msg);
return ERROR_OK;
}
static int target_hexmsg(struct target *target, int size, uint32_t length)
{
uint8_t *data = malloc(DIV_ROUND_UP(length * size, 4) * 4);
char line[128];
int line_len;
struct debug_msg_receiver *c = target->dbgmsg;
uint32_t i;
LOG_DEBUG("size: %i, length: %i", (int)size, (int)length);
target->type->target_request_data(target, DIV_ROUND_UP(length * size, 4), (uint8_t*)data);
line_len = 0;
for (i = 0; i < length; i++)
{
switch (size)
{
case 4:
line_len += snprintf(line + line_len, 128 - line_len, "%8.8" PRIx32 " ", le_to_h_u32(data + (4*i)));
break;
case 2:
line_len += snprintf(line + line_len, 128 - line_len, "%4.4x ", le_to_h_u16(data + (2*i)));
break;
case 1:
line_len += snprintf(line + line_len, 128 - line_len, "%2.2x ", data[i]);
break;
}
if ((i%8 == 7) || (i == length - 1))
{
LOG_DEBUG("%s", line);
while (c)
{
command_print(c->cmd_ctx, "%s", line);
c = c->next;
}
c = target->dbgmsg;
line_len = 0;
}
}
free(data);
return ERROR_OK;
}
/* handle requests from the target received by a target specific
* side-band channel (e.g. ARM7/9 DCC)
*/
int target_request(struct target *target, uint32_t request)
{
target_req_cmd_t target_req_cmd = request & 0xff;
if (charmsg_mode) {
target_charmsg(target, target_req_cmd);
return ERROR_OK;
}
switch (target_req_cmd)
{
case TARGET_REQ_TRACEMSG:
trace_point(target, (request & 0xffffff00) >> 8);
break;
case TARGET_REQ_DEBUGMSG:
if (((request & 0xff00) >> 8) == 0)
{
target_asciimsg(target, (request & 0xffff0000) >> 16);
}
else
{
target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
}
break;
case TARGET_REQ_DEBUGCHAR:
target_charmsg(target, (request & 0x00ff0000) >> 16);
break;
/* case TARGET_REQ_SEMIHOSTING:
* break;
*/
default:
LOG_ERROR("unknown target request: %2.2x", target_req_cmd);
break;
}
return ERROR_OK;
}
static int add_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
{
struct debug_msg_receiver **p = &target->dbgmsg;
if (target == NULL)
return ERROR_INVALID_ARGUMENTS;
/* see if there's already a list */
if (*p)
{
/* find end of linked list */
p = &target->dbgmsg;
while ((*p)->next)
p = &((*p)->next);
p = &((*p)->next);
}
/* add new debug message receiver */
(*p) = malloc(sizeof(struct debug_msg_receiver));
(*p)->cmd_ctx = cmd_ctx;
(*p)->next = NULL;
/* enable callback */
target->dbg_msg_enabled = 1;
return ERROR_OK;
}
static struct debug_msg_receiver* find_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
{
int do_all_targets = 0;
struct debug_msg_receiver **p = &target->dbgmsg;
/* if no target has been specified search all of them */
if (target == NULL)
{
/* if no targets haven been specified */
if (all_targets == NULL)
return NULL;
target = all_targets;
do_all_targets = 1;
}
do
{
while (*p)
{
if ((*p)->cmd_ctx == cmd_ctx)
{
return *p;
}
p = &((*p)->next);
}
target = target->next;
} while (target && do_all_targets);
return NULL;
}
int delete_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
{
struct debug_msg_receiver **p;
struct debug_msg_receiver *c;
int do_all_targets = 0;
/* if no target has been specified search all of them */
if (target == NULL)
{
/* if no targets haven been specified */
if (all_targets == NULL)
return ERROR_OK;
target = all_targets;
do_all_targets = 1;
}
do
{
p = &target->dbgmsg;
c = *p;
while (c)
{
struct debug_msg_receiver *next = c->next;
if (c->cmd_ctx == cmd_ctx)
{
*p = next;
free(c);
if (*p == NULL)
{
/* disable callback */
target->dbg_msg_enabled = 0;
}
return ERROR_OK;
}
else
p = &(c->next);
c = next;
}
target = target->next;
} while (target && do_all_targets);
return ERROR_OK;
}
COMMAND_HANDLER(handle_target_request_debugmsgs_command)
{
struct target *target = get_current_target(CMD_CTX);
int receiving = 0;
/* see if reciever is already registered */
if (find_debug_msg_receiver(CMD_CTX, target) != NULL)
receiving = 1;
if (CMD_ARGC > 0)
{
if (!strcmp(CMD_ARGV[0], "enable") || !strcmp(CMD_ARGV[0], "charmsg"))
{
/* don't register if this command context is already receiving */
if (!receiving)
{
receiving = 1;
add_debug_msg_receiver(CMD_CTX, target);
}
charmsg_mode = !strcmp(CMD_ARGV[0], "charmsg");
}
else if (!strcmp(CMD_ARGV[0], "disable"))
{
/* no need to delete a receiver if none is registered */
if (receiving)
{
receiving = 0;
delete_debug_msg_receiver(CMD_CTX, target);
}
}
else
{
command_print(CMD_CTX, "usage: target_request debugmsgs ['enable'|'disable'|'charmsg']");
}
}
command_print(CMD_CTX, "receiving debug messages from current target %s",
(receiving) ? (charmsg_mode?"charmsg":"enabled") : "disabled");
return ERROR_OK;
}
static const struct command_registration target_req_exec_command_handlers[] = {
{
.name = "debugmsgs",
.handler = handle_target_request_debugmsgs_command,
.mode = COMMAND_EXEC,
.help = "display and/or modify reception of debug messages from target",
.usage = "['enable'|'charmsg'|'disable']",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration target_req_command_handlers[] = {
{
.name = "target_request",
.mode = COMMAND_ANY,
.help = "target request command group",
.chain = target_req_exec_command_handlers,
},
COMMAND_REGISTRATION_DONE
};
int target_request_register_commands(struct command_context *cmd_ctx)
{
return register_commands(cmd_ctx, NULL, target_req_command_handlers);
}
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