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Avoid cache invalidation when writing to hardware debug registers 

git-svn-id: svn://svn.berlios.de/openocd/trunk@2733 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
mlu 2009-09-19 14:50:18 +00:00
parent 01735c515f
commit 781997f556
1 changed files with 19 additions and 4 deletions
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23
src/target/cortex_a8.c
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@ -332,6 +332,21 @@ int cortex_a8_dap_write_coreregister_u32(target_t *target, uint32_t value, int r
return retval;
}
/* Write to memory mapped registers directly with no cache or mmu handling */
int cortex_a8_dap_write_memap_register_u32(target_t *target, uint32_t address, uint32_t value)
{
int retval;
/* get pointers to arch-specific information */
armv4_5_common_t *armv4_5 = target->arch_info;
armv7a_common_t *armv7a = armv4_5->arch_info;
swjdp_common_t *swjdp = &armv7a->swjdp_info;
retval = mem_ap_write_atomic_u32(swjdp, address, value);
return retval;
}
/*
* Cortex-A8 Run control
*/
@ -1022,10 +1037,10 @@ int cortex_a8_set_breakpoint(struct target_s *target,
brp_list[brp_i].used = 1;
brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
brp_list[brp_i].control = control;
target_write_u32(target, armv7a->debug_base
cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].value);
target_write_u32(target, armv7a->debug_base
cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].control);
LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
@ -1088,10 +1103,10 @@ int cortex_a8_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint
brp_list[brp_i].used = 0;
brp_list[brp_i].value = 0;
brp_list[brp_i].control = 0;
target_write_u32(target, armv7a->debug_base
cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].control);
target_write_u32(target, armv7a->debug_base
cortex_a8_dap_write_memap_register_u32(target, armv7a->debug_base
+ CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
brp_list[brp_i].value);
}