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tinyriscv-openocd
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Deal with dbus being busy in all cases. 

Change-Id: Ifede6e05c3c4538f22a52cd0e9833cf3a9983d04
__archive__
Tim Newsome 2016-09-29 08:28:31 -07:00
parent b04d5e8821
commit 78fe0b56db
1 changed files with 43 additions and 17 deletions
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44
src/target/riscv/riscv.c
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@ -444,8 +444,11 @@ static dbus_status_t dbus_scan(struct target *target, uint16_t *address_in,
/* Assume dbus is already selected. */ /* Assume dbus is already selected. */
jtag_add_dr_scan(target->tap, 1, &field, TAP_IDLE); jtag_add_dr_scan(target->tap, 1, &field, TAP_IDLE);
if (info->dtmcontrol_idle) {
jtag_add_runtest(info->dtmcontrol_idle, TAP_IDLE); int idle_count = info->dtmcontrol_idle + info->dbus_busy_delay;
if (idle_count) {
jtag_add_runtest(idle_count, TAP_IDLE);
} }
int retval = jtag_execute_queue(); int retval = jtag_execute_queue();
@ -473,11 +476,18 @@ static uint64_t dbus_read(struct target *target, uint16_t address)
dbus_status_t status; dbus_status_t status;
uint16_t address_in; uint16_t address_in;
do { unsigned i = 0;
do { do {
status = dbus_scan(target, &address_in, &value, DBUS_OP_READ, address, 0); status = dbus_scan(target, &address_in, &value, DBUS_OP_READ, address, 0);
} while (status == DBUS_STATUS_BUSY); if (status == DBUS_STATUS_BUSY) {
} while (address_in != address); increase_dbus_busy_delay(target);
}
} while (((status == DBUS_STATUS_BUSY) || (address_in != address)) &&
i++ < 256);
if (status != DBUS_STATUS_SUCCESS) {
LOG_ERROR("failed read from 0x%x; value=0x%" PRIx64 ", status=%d\n", address, value, status);
}
return value; return value;
} }
@ -485,12 +495,15 @@ static uint64_t dbus_read(struct target *target, uint16_t address)
static void dbus_write(struct target *target, uint16_t address, uint64_t value) static void dbus_write(struct target *target, uint16_t address, uint64_t value)
{ {
dbus_status_t status = DBUS_STATUS_BUSY; dbus_status_t status = DBUS_STATUS_BUSY;
while (status == DBUS_STATUS_BUSY) { unsigned i = 0;
while (status == DBUS_STATUS_BUSY && i++ < 256) {
status = dbus_scan(target, NULL, NULL, DBUS_OP_WRITE, address, value); status = dbus_scan(target, NULL, NULL, DBUS_OP_WRITE, address, value);
if (status == DBUS_STATUS_BUSY) {
increase_dbus_busy_delay(target);
}
} }
if (status != DBUS_STATUS_SUCCESS) { if (status != DBUS_STATUS_SUCCESS) {
LOG_ERROR("dbus_write failed write 0x%" PRIx64 " to 0x%x; status=%d\n", LOG_ERROR("failed to write 0x%" PRIx64 " to 0x%x; status=%d\n", value, address, status);
value, address, status);
} }
} }
@ -659,9 +672,22 @@ static bits_t read_bits(struct target *target)
uint16_t address_in; uint16_t address_in;
do { do {
unsigned i = 0;
do { do {
status = dbus_scan(target, &address_in, &value, DBUS_OP_READ, 0, 0); status = dbus_scan(target, &address_in, &value, DBUS_OP_READ, 0, 0);
} while (status == DBUS_STATUS_BUSY); if (status == DBUS_STATUS_BUSY) {
increase_dbus_busy_delay(target);
}
} while (status == DBUS_STATUS_BUSY && i++ < 256);
if (i >= 256) {
LOG_ERROR("Failed to read from 0x%x; status=%d", address_in, status);
bits_t err_result = {
.haltnot = 0,
.interrupt = 0
};
return err_result;
}
} while (address_in > 0x10 && address_in != DMCONTROL); } while (address_in > 0x10 && address_in != DMCONTROL);
bits_t result = { bits_t result = {