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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 bool got_message = false;
-
- bool target_got_message(void)
- {
- bool t = got_message;
- got_message = false;
- return t;
- }
-
- 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;
-
- /* Record that we got a target message for back-off algorithm */
- got_message = true;
-
- 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;
-
- /* 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;
- }
-
- /* so we target != null */
- struct debug_msg_receiver **p = &target->dbgmsg;
- 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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