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Diffstat (limited to 'src/target/arm7_9_common.c')
-rw-r--r--src/target/arm7_9_common.c385
1 files changed, 117 insertions, 268 deletions
diff --git a/src/target/arm7_9_common.c b/src/target/arm7_9_common.c
index be2c4888..8e2adcc6 100644
--- a/src/target/arm7_9_common.c
+++ b/src/target/arm7_9_common.c
@@ -53,53 +53,90 @@ int handle_arm7_9_write_xpsr_command(struct command_context_s *cmd_ctx, char *cm
int handle_arm7_9_write_xpsr_im8_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_read_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_arm7_9_sw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_arm7_9_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_fast_memory_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_dcc_downloads_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
int handle_arm7_9_etm_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int arm7_9_reinit_embeddedice(target_t *target)
-{
- armv4_5_common_t *armv4_5 = target->arch_info;
- arm7_9_common_t *arm7_9 = armv4_5->arch_info;
-
- breakpoint_t *breakpoint = target->breakpoints;
- arm7_9->wp_available = 2;
+/* FIX!!! this needs to be overrideable by e.g. fereceon*/
+static int arm7_9_clear_watchpoints(arm7_9_common_t *arm7_9)
+{
+ embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
+ embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
+ arm7_9->sw_breakpoints_added = 0;
arm7_9->wp0_used = 0;
arm7_9->wp1_used = 0;
+ arm7_9->wp_available = 2;
- /* mark all hardware breakpoints as unset */
- while (breakpoint)
+ return jtag_execute_queue();
+}
+
+/* set up embedded ice registers */
+static int arm7_9_set_software_breakpoints(arm7_9_common_t *arm7_9)
+{
+ if (arm7_9->sw_breakpoints_added)
{
- if (breakpoint->type == BKPT_HARD)
- {
- breakpoint->set = 0;
- }
- breakpoint = breakpoint->next;
+ return ERROR_OK;
+ }
+ if (arm7_9->wp_available < 1)
+ {
+ LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ }
+ arm7_9->wp_available--;
+
+ /* pick a breakpoint unit */
+ if (!arm7_9->wp0_used)
+ {
+ arm7_9->sw_breakpoints_added=1;
+ arm7_9->wp0_used = 3;
+ } else if (!arm7_9->wp1_used)
+ {
+ arm7_9->sw_breakpoints_added=2;
+ arm7_9->wp1_used = 3;
+ }
+ else
+ {
+ LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
+ return ERROR_FAIL;
}
- if (arm7_9->sw_bkpts_enabled && arm7_9->sw_bkpts_use_wp)
+ if (arm7_9->sw_breakpoints_added==1)
+ {
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
+ }
+ else if (arm7_9->sw_breakpoints_added==2)
+ {
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
+ embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
+ }
+ else
{
- arm7_9->sw_bkpts_enabled = 0;
- arm7_9_enable_sw_bkpts(target);
+ LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
+ return ERROR_FAIL;
}
- return ERROR_OK;
+ return jtag_execute_queue();
}
/* set things up after a reset / on startup */
int arm7_9_setup(target_t *target)
{
- /* a test-logic reset have occured
- * the EmbeddedICE registers have been reset
- * hardware breakpoints have been cleared
- */
- return arm7_9_reinit_embeddedice(target);
+ armv4_5_common_t *armv4_5 = target->arch_info;
+ arm7_9_common_t *arm7_9 = armv4_5->arch_info;
+
+ return arm7_9_clear_watchpoints(arm7_9);
}
+
int arm7_9_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p)
{
armv4_5_common_t *armv4_5 = target->arch_info;
@@ -121,10 +158,14 @@ int arm7_9_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm
return ERROR_OK;
}
+/* we set up the breakpoint even if it is already set. Some action, e.g. reset
+ * might have erased the values in embedded ice
+ */
int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
{
armv4_5_common_t *armv4_5 = target->arch_info;
arm7_9_common_t *arm7_9 = armv4_5->arch_info;
+ int retval=ERROR_OK;
if (target->state != TARGET_HALTED)
{
@@ -132,51 +173,43 @@ int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
return ERROR_TARGET_NOT_HALTED;
}
- if (arm7_9->force_hw_bkpts)
- breakpoint->type = BKPT_HARD;
-
- if (breakpoint->set)
- {
- LOG_WARNING("breakpoint already set");
- return ERROR_OK;
- }
-
if (breakpoint->type == BKPT_HARD)
{
/* either an ARM (4 byte) or Thumb (2 byte) breakpoint */
u32 mask = (breakpoint->length == 4) ? 0x3u : 0x1u;
- if (!arm7_9->wp0_used)
+ if (breakpoint->set==1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_VALUE], breakpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
-
- jtag_execute_queue();
- arm7_9->wp0_used = 1;
- breakpoint->set = 1;
}
- else if (!arm7_9->wp1_used)
+ else if (breakpoint->set==2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_VALUE], breakpoint->address);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], mask);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0xffffffffu);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
-
- jtag_execute_queue();
- arm7_9->wp1_used = 1;
- breakpoint->set = 2;
}
else
{
LOG_ERROR("BUG: no hardware comparator available");
return ERROR_OK;
}
+
+ retval=jtag_execute_queue();
}
else if (breakpoint->type == BKPT_SOFT)
{
+ if ((retval=arm7_9_set_software_breakpoints(arm7_9))!=ERROR_OK)
+ return retval;
+
+ /* did we already set this breakpoint? */
+ if (breakpoint->set)
+ return ERROR_OK;
+
if (breakpoint->length == 4)
{
u32 verify = 0xffffffff;
@@ -210,7 +243,7 @@ int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
breakpoint->set = 1;
}
- return ERROR_OK;
+ return retval;
}
@@ -219,12 +252,6 @@ int arm7_9_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
armv4_5_common_t *armv4_5 = target->arch_info;
arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- if (target->state != TARGET_HALTED)
- {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
if (!breakpoint->set)
{
LOG_WARNING("breakpoint not set");
@@ -236,15 +263,14 @@ int arm7_9_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
if (breakpoint->set == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
- jtag_execute_queue();
arm7_9->wp0_used = 0;
}
else if (breakpoint->set == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
- jtag_execute_queue();
arm7_9->wp1_used = 0;
}
+ jtag_execute_queue();
breakpoint->set = 0;
}
else
@@ -282,17 +308,13 @@ int arm7_9_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
LOG_WARNING("target not halted");
return ERROR_TARGET_NOT_HALTED;
}
-
- if (arm7_9->force_hw_bkpts)
- {
- LOG_DEBUG("forcing use of hardware breakpoint at address 0x%8.8x", breakpoint->address);
- breakpoint->type = BKPT_HARD;
- }
-
- if ((breakpoint->type == BKPT_SOFT) && (arm7_9->sw_bkpts_enabled == 0))
+
+ if (arm7_9->breakpoint_count==0)
{
- LOG_INFO("sw breakpoint requested, but software breakpoints not enabled");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ /* make sure we don't have any dangling breakpoints. This is vital upon
+ * GDB connect/disconnect
+ */
+ arm7_9_clear_watchpoints(arm7_9);
}
if ((breakpoint->type == BKPT_HARD) && (arm7_9->wp_available < 1))
@@ -308,9 +330,29 @@ int arm7_9_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
}
if (breakpoint->type == BKPT_HARD)
+ {
arm7_9->wp_available--;
+
+ if (!arm7_9->wp0_used)
+ {
+ arm7_9->wp0_used = 1;
+ breakpoint->set = 1;
+ }
+ else if (!arm7_9->wp1_used)
+ {
+ arm7_9->wp1_used = 1;
+ breakpoint->set = 2;
+ }
+ else
+ {
+ LOG_ERROR("BUG: no hardware comparator available");
+ }
+ }
+
- return ERROR_OK;
+ arm7_9->breakpoint_count++;
+
+ return arm7_9_set_breakpoint(target, breakpoint);
}
int arm7_9_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
@@ -318,19 +360,17 @@ int arm7_9_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
armv4_5_common_t *armv4_5 = target->arch_info;
arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- if (target->state != TARGET_HALTED)
- {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (breakpoint->set)
- {
- arm7_9_unset_breakpoint(target, breakpoint);
- }
+ arm7_9_unset_breakpoint(target, breakpoint);
if (breakpoint->type == BKPT_HARD)
arm7_9->wp_available++;
+
+ arm7_9->breakpoint_count--;
+ if (arm7_9->breakpoint_count==0)
+ {
+ /* make sure we don't have any dangling breakpoints */
+ arm7_9_clear_watchpoints(arm7_9);
+ }
return ERROR_OK;
}
@@ -457,12 +497,6 @@ int arm7_9_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
armv4_5_common_t *armv4_5 = target->arch_info;
arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- if (target->state != TARGET_HALTED)
- {
- LOG_WARNING("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
if (watchpoint->set)
{
arm7_9_unset_watchpoint(target, watchpoint);
@@ -473,82 +507,8 @@ int arm7_9_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
return ERROR_OK;
}
-int arm7_9_enable_sw_bkpts(struct target_s *target)
-{
- armv4_5_common_t *armv4_5 = target->arch_info;
- arm7_9_common_t *arm7_9 = armv4_5->arch_info;
- int retval;
- if (arm7_9->sw_bkpts_enabled)
- return ERROR_OK;
- if (arm7_9->wp_available < 1)
- {
- LOG_WARNING("can't enable sw breakpoints with no watchpoint unit available");
- return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
- }
- arm7_9->wp_available--;
-
- if (!arm7_9->wp0_used)
- {
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_VALUE], arm7_9->arm_bkpt);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_DATA_MASK], 0x0);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_ADDR_MASK], 0xffffffffu);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
- arm7_9->sw_bkpts_enabled = 1;
- arm7_9->wp0_used = 3;
- }
- else if (!arm7_9->wp1_used)
- {
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_VALUE], arm7_9->arm_bkpt);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_DATA_MASK], 0x0);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_ADDR_MASK], 0xffffffffu);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_MASK], ~EICE_W_CTRL_nOPC & 0xff);
- embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], EICE_W_CTRL_ENABLE);
- arm7_9->sw_bkpts_enabled = 2;
- arm7_9->wp1_used = 3;
- }
- else
- {
- LOG_ERROR("BUG: both watchpoints used, but wp_available >= 1");
- return ERROR_FAIL;
- }
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
- LOG_ERROR("error writing EmbeddedICE registers to enable sw breakpoints");
- return ERROR_FAIL;
- };
-
- return ERROR_OK;
-}
-
-int arm7_9_disable_sw_bkpts(struct target_s *target)
-{
- armv4_5_common_t *armv4_5 = target->arch_info;
- arm7_9_common_t *arm7_9 = armv4_5->arch_info;
-
- if (!arm7_9->sw_bkpts_enabled)
- return ERROR_OK;
-
- if (arm7_9->sw_bkpts_enabled == 1)
- {
- embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0x0);
- arm7_9->sw_bkpts_enabled = 0;
- arm7_9->wp0_used = 0;
- arm7_9->wp_available++;
- }
- else if (arm7_9->sw_bkpts_enabled == 2)
- {
- embeddedice_write_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0x0);
- arm7_9->sw_bkpts_enabled = 0;
- arm7_9->wp1_used = 0;
- arm7_9->wp_available++;
- }
-
- return ERROR_OK;
-}
int arm7_9_execute_sys_speed(struct target_s *target)
{
@@ -1450,32 +1410,11 @@ void arm7_9_enable_breakpoints(struct target_s *target)
/* set any pending breakpoints */
while (breakpoint)
{
- if (breakpoint->set == 0)
- arm7_9_set_breakpoint(target, breakpoint);
+ arm7_9_set_breakpoint(target, breakpoint);
breakpoint = breakpoint->next;
}
}
-void arm7_9_disable_bkpts_and_wpts(struct target_s *target)
-{
- breakpoint_t *breakpoint = target->breakpoints;
- watchpoint_t *watchpoint = target->watchpoints;
-
- /* set any pending breakpoints */
- while (breakpoint)
- {
- if (breakpoint->set != 0)
- arm7_9_unset_breakpoint(target, breakpoint);
- breakpoint = breakpoint->next;
- }
-
- while (watchpoint)
- {
- if (watchpoint->set != 0)
- arm7_9_unset_watchpoint(target, watchpoint);
- watchpoint = watchpoint->next;
- }
-}
int arm7_9_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
{
@@ -2402,8 +2341,6 @@ int arm7_9_register_commands(struct command_context_s *cmd_ctx)
register_command(cmd_ctx, arm7_9_cmd, "write_core_reg", handle_arm7_9_write_core_reg_command, COMMAND_EXEC, "write core register <num> <mode> <value>");
- register_command(cmd_ctx, arm7_9_cmd, "sw_bkpts", handle_arm7_9_sw_bkpts_command, COMMAND_EXEC, "support for software breakpoints <enable|disable>");
- register_command(cmd_ctx, arm7_9_cmd, "force_hw_bkpts", handle_arm7_9_force_hw_bkpts_command, COMMAND_EXEC, "use hardware breakpoints for all breakpoints (disables sw breakpoint support) <enable|disable>");
register_command(cmd_ctx, arm7_9_cmd, "dbgrq", handle_arm7_9_dbgrq_command,
COMMAND_ANY, "use EmbeddedICE dbgrq instead of breakpoint for target halt requests <enable|disable>");
register_command(cmd_ctx, arm7_9_cmd, "fast_writes", handle_arm7_9_fast_memory_access_command,
@@ -2542,95 +2479,6 @@ int handle_arm7_9_write_core_reg_command(struct command_context_s *cmd_ctx, char
return ERROR_OK;
}
-int handle_arm7_9_sw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
-
- if (target->state != TARGET_HALTED)
- {
- LOG_ERROR("target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
- {
- command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
- }
-
- if (argc == 0)
- {
- command_print(cmd_ctx, "software breakpoints %s", (arm7_9->sw_bkpts_enabled) ? "enabled" : "disabled");
- return ERROR_OK;
- }
-
- if (strcmp("enable", args[0]) == 0)
- {
- if (arm7_9->sw_bkpts_use_wp)
- {
- arm7_9_enable_sw_bkpts(target);
- }
- else
- {
- arm7_9->sw_bkpts_enabled = 1;
- }
- }
- else if (strcmp("disable", args[0]) == 0)
- {
- if (arm7_9->sw_bkpts_use_wp)
- {
- arm7_9_disable_sw_bkpts(target);
- }
- else
- {
- arm7_9->sw_bkpts_enabled = 0;
- }
- }
- else
- {
- command_print(cmd_ctx, "usage: arm7_9 sw_bkpts <enable|disable>");
- }
-
- command_print(cmd_ctx, "software breakpoints %s", (arm7_9->sw_bkpts_enabled) ? "enabled" : "disabled");
-
- return ERROR_OK;
-}
-
-int handle_arm7_9_force_hw_bkpts_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
- target_t *target = get_current_target(cmd_ctx);
- armv4_5_common_t *armv4_5;
- arm7_9_common_t *arm7_9;
-
- if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
- {
- command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
- return ERROR_OK;
- }
-
- if ((argc >= 1) && (strcmp("enable", args[0]) == 0))
- {
- arm7_9->force_hw_bkpts = 1;
- if (arm7_9->sw_bkpts_use_wp)
- {
- arm7_9_disable_sw_bkpts(target);
- }
- }
- else if ((argc >= 1) && (strcmp("disable", args[0]) == 0))
- {
- arm7_9->force_hw_bkpts = 0;
- }
- else
- {
- command_print(cmd_ctx, "usage: arm7_9 force_hw_bkpts <enable|disable>");
- }
-
- command_print(cmd_ctx, "force hardware breakpoints %s", (arm7_9->force_hw_bkpts) ? "enabled" : "disabled");
-
- return ERROR_OK;
-}
int handle_arm7_9_dbgrq_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
@@ -2739,9 +2587,10 @@ int arm7_9_init_arch_info(target_t *target, arm7_9_common_t *arm7_9)
arm_jtag_setup_connection(&arm7_9->jtag_info);
arm7_9->wp_available = 2;
+ arm7_9->sw_breakpoints_added = 0;
+ arm7_9->breakpoint_count = 0;
arm7_9->wp0_used = 0;
arm7_9->wp1_used = 0;
- arm7_9->force_hw_bkpts = 0;
arm7_9->use_dbgrq = 0;
arm7_9->etm_ctx = NULL;