diff options
| -rw-r--r-- | src/target/cortex_a8.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/target/cortex_a8.c b/src/target/cortex_a8.c index 821d7194..7e9a0a9b 100644 --- a/src/target/cortex_a8.c +++ b/src/target/cortex_a8.c @@ -236,11 +236,25 @@ int cortex_a8_write_cp(target_t *target, uint32_t value, uint8_t CP, uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2) { int retval; + uint32_t dscr; + /* get pointers to arch-specific information */ armv4_5_common_t *armv4_5 = target->arch_info; armv7a_common_t *armv7a = armv4_5->arch_info; swjdp_common_t *swjdp = &armv7a->swjdp_info; + LOG_DEBUG("CP%i, CRn %i, value 0x%08" PRIx32, CP, CRn, value); + + /* Check that DCCRX is not full */ + retval = mem_ap_read_atomic_u32(swjdp, + armv7a->debug_base + CPUDBG_DSCR, &dscr); + if (dscr & (1 << DSCR_DTR_RX_FULL)) + { + LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr); + /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */ + cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0)); + } + retval = mem_ap_write_u32(swjdp, armv7a->debug_base + CPUDBG_DTRRX, value); /* Move DTRRX to r0 */ @@ -311,12 +325,25 @@ int cortex_a8_dap_write_coreregister_u32(target_t *target, uint32_t value, int r { int retval = ERROR_OK; uint8_t Rd = regnum&0xFF; + uint32_t dscr; /* get pointers to arch-specific information */ armv4_5_common_t *armv4_5 = target->arch_info; armv7a_common_t *armv7a = armv4_5->arch_info; swjdp_common_t *swjdp = &armv7a->swjdp_info; + LOG_DEBUG("register %i, value 0x%08" PRIx32, regnum, value); + + /* Check that DCCRX is not full */ + retval = mem_ap_read_atomic_u32(swjdp, + armv7a->debug_base + CPUDBG_DSCR, &dscr); + if (dscr & (1 << DSCR_DTR_RX_FULL)) + { + LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr); + /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */ + cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0)); + } + if (Rd > 16) return retval; |