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target/cortex_a: use extensively cortex_a_wait_dscr_bits() 

We have the function to wait for bits in dscr. Use it whenever
possible.

When the bit to test is DSCR_INSTR_COMP, use instead the wrapper
function cortex_a_wait_instrcmpl().

Change-Id: I5c54c239a00f489712af448eb97752210b4b38b8
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5113
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
bscan_optimization
Antonio Borneo 2019-04-15 23:46:29 +02:00 committed by Matthias Welwarsky
parent d870ecf5ff
commit f9986394dc
1 changed files with 39 additions and 71 deletions
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96
src/target/cortex_a.c
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@ -70,6 +70,8 @@ static int cortex_a_set_hybrid_breakpoint(struct target *target,
struct breakpoint *breakpoint);
static int cortex_a_unset_breakpoint(struct target *target,
struct breakpoint *breakpoint);
static int cortex_a_wait_dscr_bits(struct target *target, uint32_t mask,
uint32_t value, uint32_t *dscr);
static int cortex_a_mmu(struct target *target, int *enabled);
static int cortex_a_mmu_modify(struct target *target, int enable);
static int cortex_a_virt2phys(struct target *target,
@ -250,21 +252,21 @@ static int cortex_a_wait_instrcmpl(struct target *target, uint32_t *dscr, bool f
* Writes final value of DSCR into *dscr. Pass force to force always
* reading DSCR at least once. */
struct armv7a_common *armv7a = target_to_armv7a(target);
int64_t then = timeval_ms();
while ((*dscr & DSCR_INSTR_COMP) == 0 || force) {
force = false;
int retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
int retval;
if (force) {
retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSCR, dscr);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read DSCR register");
return retval;
}
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for InstrCompl=1");
return ERROR_FAIL;
}
}
return ERROR_OK;
retval = cortex_a_wait_dscr_bits(target, DSCR_INSTR_COMP, DSCR_INSTR_COMP, dscr);
if (retval != ERROR_OK)
LOG_ERROR("Error waiting for InstrCompl=1");
return retval;
}
/* To reduce needless round-trips, pass in a pointer to the current
@ -293,19 +295,12 @@ static int cortex_a_exec_opcode(struct target *target,
if (retval != ERROR_OK)
return retval;
int64_t then = timeval_ms();
do {
retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
/* Wait for InstrCompl bit to be set */
retval = cortex_a_wait_instrcmpl(target, &dscr, true);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read DSCR register");
LOG_ERROR("Error waiting for cortex_a_exec_opcode");
return retval;
}
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for cortex_a_exec_opcode");
return ERROR_FAIL;
}
} while ((dscr & DSCR_INSTR_COMP) == 0); /* Wait for InstrCompl bit to be set */
if (dscr_p)
*dscr_p = dscr;
@ -359,17 +354,11 @@ static int cortex_a_read_dcc(struct cortex_a_common *a, uint32_t *data,
dscr = *dscr_p;
/* Wait for DTRRXfull */
int64_t then = timeval_ms();
while ((dscr & DSCR_DTR_TX_FULL) == 0) {
retval = mem_ap_read_atomic_u32(a->armv7a_common.debug_ap,
a->armv7a_common.debug_base + CPUDBG_DSCR,
&dscr);
if (retval != ERROR_OK)
retval = cortex_a_wait_dscr_bits(a->armv7a_common.arm.target,
DSCR_DTR_TX_FULL, DSCR_DTR_TX_FULL, &dscr);
if (retval != ERROR_OK) {
LOG_ERROR("Error waiting for read dcc");
return retval;
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for read dcc");
return ERROR_FAIL;
}
}
retval = mem_ap_read_atomic_u32(a->armv7a_common.debug_ap,
@ -391,19 +380,10 @@ static int cortex_a_dpm_prepare(struct arm_dpm *dpm)
int retval;
/* set up invariant: INSTR_COMP is set after ever DPM operation */
int64_t then = timeval_ms();
for (;; ) {
retval = mem_ap_read_atomic_u32(a->armv7a_common.debug_ap,
a->armv7a_common.debug_base + CPUDBG_DSCR,
&dscr);
if (retval != ERROR_OK)
retval = cortex_a_wait_instrcmpl(dpm->arm->target, &dscr, true);
if (retval != ERROR_OK) {
LOG_ERROR("Error waiting for dpm prepare");
return retval;
if ((dscr & DSCR_INSTR_COMP) != 0)
break;
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for dpm prepare");
return ERROR_FAIL;
}
}
/* this "should never happen" ... */
@ -752,7 +732,7 @@ static int cortex_a_poll(struct target *target)
static int cortex_a_halt(struct target *target)
{
int retval = ERROR_OK;
int retval;
uint32_t dscr;
struct armv7a_common *armv7a = target_to_armv7a(target);
@ -765,18 +745,12 @@ static int cortex_a_halt(struct target *target)
if (retval != ERROR_OK)
return retval;
int64_t then = timeval_ms();
for (;; ) {
retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
if (retval != ERROR_OK)
dscr = 0; /* force read of dscr */
retval = cortex_a_wait_dscr_bits(target, DSCR_CORE_HALTED,
DSCR_CORE_HALTED, &dscr);
if (retval != ERROR_OK) {
LOG_ERROR("Error waiting for halt");
return retval;
if ((dscr & DSCR_CORE_HALTED) != 0)
break;
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for halt");
return ERROR_FAIL;
}
}
target->debug_reason = DBG_REASON_DBGRQ;
@ -915,18 +889,12 @@ static int cortex_a_internal_restart(struct target *target)
if (retval != ERROR_OK)
return retval;
int64_t then = timeval_ms();
for (;; ) {
retval = mem_ap_read_atomic_u32(armv7a->debug_ap,
armv7a->debug_base + CPUDBG_DSCR, &dscr);
if (retval != ERROR_OK)
dscr = 0; /* force read of dscr */
retval = cortex_a_wait_dscr_bits(target, DSCR_CORE_RESTARTED,
DSCR_CORE_RESTARTED, &dscr);
if (retval != ERROR_OK) {
LOG_ERROR("Error waiting for resume");
return retval;
if ((dscr & DSCR_CORE_RESTARTED) != 0)
break;
if (timeval_ms() > then + 1000) {
LOG_ERROR("Timeout waiting for resume");
return ERROR_FAIL;
}
}
target->debug_reason = DBG_REASON_NOTHALTED;