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Cortex-M: Detect Flash Patch Revision and implement Rev. 2 handling. 

E.g. STM32F7 implements Rev.2.
Supercedes abandoned patch 2755 that doesn't evaluate Flash patch revision.

Change-Id: I48756b0451c7359475066969c900978a536bc328
Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Reviewed-on: http://openocd.zylin.com/2868
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
__archive__
Uwe Bonnes 2015-07-15 12:53:40 +02:00 committed by Andreas Fritiofson
parent 11eff9baea
commit 0663cb5e47
2 changed files with 15 additions and 3 deletions
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15
src/target/cortex_m.c
View File

@ -1125,7 +1125,6 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint
{
int retval;
int fp_num = 0;
uint32_t hilo;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct cortex_m_fp_comparator *comparator_list = cortex_m->fp_comparator_list;
@ -1138,6 +1137,7 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint
breakpoint->type = BKPT_TYPE_BY_ADDR(breakpoint->address);
if (breakpoint->type == BKPT_HARD) {
uint32_t fpcr_value;
while (comparator_list[fp_num].used && (fp_num < cortex_m->fp_num_code))
fp_num++;
if (fp_num >= cortex_m->fp_num_code) {
@ -1145,9 +1145,17 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint
return ERROR_FAIL;
}
breakpoint->set = fp_num + 1;
fpcr_value = breakpoint->address | 1;
if (cortex_m->fp_rev == 0) {
uint32_t hilo;
hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW;
fpcr_value = (fpcr_value & 0x1FFFFFFC) | hilo | 1;
} else if (cortex_m->fp_rev > 1) {
LOG_ERROR("Unhandled Cortex-M Flash Patch Breakpoint architecture revision");
return ERROR_FAIL;
}
comparator_list[fp_num].used = 1;
comparator_list[fp_num].fpcr_value = (breakpoint->address & 0x1FFFFFFC) | hilo | 1;
comparator_list[fp_num].fpcr_value = fpcr_value;
target_write_u32(target, comparator_list[fp_num].fpcr_address,
comparator_list[fp_num].fpcr_value);
LOG_DEBUG("fpc_num %i fpcr_value 0x%" PRIx32 "",
@ -1962,6 +1970,9 @@ int cortex_m_examine(struct target *target)
cortex_m->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF);
cortex_m->fp_num_lit = (fpcr >> 8) & 0xF;
cortex_m->fp_code_available = cortex_m->fp_num_code;
/* Detect flash patch revision, see RM DDI 0403E.b page C1-817.
Revision is zero base, fp_rev == 1 means Rev.2 ! */
cortex_m->fp_rev = (fpcr >> 28) & 0xf;
free(cortex_m->fp_comparator_list);
cortex_m->fp_comparator_list = calloc(
cortex_m->fp_num_code + cortex_m->fp_num_lit,

1
src/target/cortex_m.h
View File

@ -175,6 +175,7 @@ struct cortex_m_common {
int fp_num_lit;
int fp_num_code;
int fp_code_available;
int fp_rev;
int fpb_enabled;
int auto_bp_type;
struct cortex_m_fp_comparator *fp_comparator_list;