#include "jtag/interface.h"
#include "transport/transport.h"
#include "smp.h"
+#include <helper/bits.h>
#include <helper/time_support.h>
static int cortex_a_poll(struct target *target);
int retval = ERROR_OK;
int wrp_i = 0;
uint32_t control;
- uint8_t address_mask = ilog2(watchpoint->length);
- uint8_t byte_address_select = 0xFF;
+ uint32_t address;
+ uint8_t address_mask;
+ uint8_t byte_address_select;
uint8_t load_store_access_control = 0x3;
struct cortex_a_common *cortex_a = target_to_cortex_a(target);
struct armv7a_common *armv7a = &cortex_a->armv7a_common;
return ERROR_FAIL;
}
- if (address_mask == 0x1 || address_mask == 0x2) {
- LOG_WARNING("length must be a power of 2 and different than 2 and 4");
+ if (watchpoint->length == 0 || watchpoint->length > 0x80000000U ||
+ (watchpoint->length & (watchpoint->length - 1))) {
+ LOG_WARNING("watchpoint length must be a power of 2");
return ERROR_FAIL;
}
+ if (watchpoint->address & (watchpoint->length - 1)) {
+ LOG_WARNING("watchpoint address must be aligned at length");
+ return ERROR_FAIL;
+ }
+
+ /* FIXME: ARM DDI 0406C: address_mask is optional. What to do if it's missing? */
+ /* handle wp length 1 and 2 through byte select */
+ switch (watchpoint->length) {
+ case 1:
+ byte_address_select = BIT(watchpoint->address & 0x3);
+ address = watchpoint->address & ~0x3;
+ address_mask = 0;
+ break;
+
+ case 2:
+ byte_address_select = 0x03 << (watchpoint->address & 0x2);
+ address = watchpoint->address & ~0x3;
+ address_mask = 0;
+ break;
+
+ case 4:
+ byte_address_select = 0x0f;
+ address = watchpoint->address;
+ address_mask = 0;
+ break;
+
+ default:
+ byte_address_select = 0xff;
+ address = watchpoint->address;
+ address_mask = ilog2(watchpoint->length);
+ break;
+ }
+
watchpoint->set = wrp_i + 1;
control = (address_mask << 24) |
(byte_address_select << 5) |
(load_store_access_control << 3) |
(0x3 << 1) | 1;
wrp_list[wrp_i].used = 1;
- wrp_list[wrp_i].value = (watchpoint->address & 0xFFFFFFFC);
+ wrp_list[wrp_i].value = address;
wrp_list[wrp_i].control = control;
retval = cortex_a_dap_write_memap_register_u32(target, armv7a->debug_base