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restore ICE watchpoint registers when the *last* software breakpoint is removed 

git-svn-id: svn://svn.berlios.de/openocd/trunk@2646 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe 2009-08-28 09:47:19 +00:00
parent a5d02116a6
commit efef05870d
2 changed files with 23 additions and 3 deletions
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25
src/target/arm7_9_common.c
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@ -61,6 +61,7 @@ static int arm7_9_clear_watchpoints(arm7_9_common_t *arm7_9)
LOG_DEBUG("-");
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_breakpoint_count = 0;
arm7_9->sw_breakpoints_added = 0;
arm7_9->wp0_used = 0;
arm7_9->wp1_used = arm7_9->wp1_used_default;
@ -274,9 +275,6 @@ int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
}
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;
@ -329,6 +327,12 @@ int arm7_9_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
return ERROR_OK;
}
}
if ((retval = arm7_9_set_software_breakpoints(arm7_9)) != ERROR_OK)
return retval;
arm7_9->sw_breakpoint_count++;
breakpoint->set = 1;
}
@ -415,6 +419,20 @@ int arm7_9_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
return retval;
}
}
if (--arm7_9->sw_breakpoint_count==0)
{
/* We have removed the last sw breakpoint, clear the hw breakpoint we used to implement it */
if (arm7_9->sw_breakpoints_added == 1)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W0_CONTROL_VALUE], 0);
}
else if (arm7_9->sw_breakpoints_added == 2)
{
embeddedice_set_reg(&arm7_9->eice_cache->reg_list[EICE_W1_CONTROL_VALUE], 0);
}
}
breakpoint->set = 0;
}
@ -3109,6 +3127,7 @@ int arm7_9_init_arch_info(target_t *target, arm7_9_common_t *arm7_9)
arm7_9->wp_available = 0; /* this is set up in arm7_9_clear_watchpoints() */
arm7_9->wp_available_max = 2;
arm7_9->sw_breakpoints_added = 0;
arm7_9->sw_breakpoint_count = 0;
arm7_9->breakpoint_count = 0;
arm7_9->wp0_used = 0;
arm7_9->wp1_used = 0;

1
src/target/arm7_9_common.h
View File

@ -47,6 +47,7 @@ typedef struct arm7_9_common_s
uint32_t arm_bkpt; /**< ARM breakpoint instruction */
uint16_t thumb_bkpt; /**< Thumb breakpoint instruction */
int sw_breakpoints_added; /**< Specifies which watchpoint software breakpoints are setup on */
int sw_breakpoint_count; /**< keep track of number of software breakpoints we have set */
int breakpoint_count; /**< Current number of set breakpoints */
int wp_available; /**< Current number of available watchpoint units */
int wp_available_max; /**< Maximum number of available watchpoint units */