-
- LOG_DEBUG("%s", __func__);
-
- /* NOTE: we "know" here that the register identifiers used
- * in the v7m header match the Cortex-M3 Debug Core Register
- * Selector values for R0..R15, xPSR, MSP, and PSP.
- */
- switch (num) {
- case 0 ... 18:
- retval = adapter->layout->api->write_reg(adapter->handle, num, value);
-
- if (retval != ERROR_OK) {
- struct reg *r;
-
- LOG_ERROR("JTAG failure");
- r = armv7m->arm.core_cache->reg_list + num;
- r->dirty = r->valid;
- return ERROR_JTAG_DEVICE_ERROR;
- }
- LOG_DEBUG("write core reg %i value 0x%" PRIx32 "", (int)num, value);
- break;
-
- case ARMV7M_FPSCR:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, ARMV7M_SCS_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, ARMV7M_SCS_DCRSR, 33 | (1<<16));
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("write FPSCR value 0x%" PRIx32, value);
- break;
-
- case ARMV7M_S0 ... ARMV7M_S31:
- /* Floating-point Status and Registers */
- retval = target_write_u32(target, ARMV7M_SCS_DCRDR, value);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, ARMV7M_SCS_DCRSR, (num-ARMV7M_S0+64) | (1<<16));
- if (retval != ERROR_OK)
- return retval;
- LOG_DEBUG("write FPU reg S%d value 0x%" PRIx32,
- (int)(num - ARMV7M_S0), value);
- break;
-
- case ARMV7M_PRIMASK:
- case ARMV7M_BASEPRI:
- case ARMV7M_FAULTMASK:
- case ARMV7M_CONTROL:
- /* Cortex-M3 packages these four registers as bitfields
- * in one Debug Core register. So say r0 and r2 docs;
- * it was removed from r1 docs, but still works.
- */
-
- adapter->layout->api->read_reg(adapter->handle, 20, ®);
-
- switch (num) {
- case ARMV7M_PRIMASK:
- buf_set_u32((uint8_t *) ®, 0, 1, value);
- break;
-
- case ARMV7M_BASEPRI:
- buf_set_u32((uint8_t *) ®, 8, 8, value);
- break;
-
- case ARMV7M_FAULTMASK:
- buf_set_u32((uint8_t *) ®, 16, 1, value);
- break;
-
- case ARMV7M_CONTROL:
- buf_set_u32((uint8_t *) ®, 24, 2, value);
- break;
- }
-
- adapter->layout->api->write_reg(adapter->handle, 20, reg);
-
- LOG_DEBUG("write special reg %i value 0x%" PRIx32 " ", (int)num, value);
- break;
-
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- return ERROR_OK;