diff options
author | Antonio Borneo <borneo.antonio@gmail.com> | 2018-10-07 16:27:27 +0200 |
---|---|---|
committer | Matthias Welwarsky <matthias@welwarsky.de> | 2018-11-06 12:42:24 +0000 |
commit | 29c81a80510aa82b1842b15a9b091a3062cb51dc (patch) | |
tree | 306983aff171c6fd4bb91ba190c967ea243de22b /src/target/cortex_a.c | |
parent | cf9c0fba9bae1eead383db94a9865f34eac6c811 (diff) |
target/cortex_a: remove duplicate code to read target registers
The functions cortex_a_dap_{read,write}_coreregister_u32() are
duplicate of the functions dpm_{read,write}_reg().
Remove both duplicated functions in cortex_a.c while export only
dpm_read_reg(), since dpm_write_reg() is currently not used.
Rename dpm_read_reg() as arm_dpm_read_reg() to keep uniform the
naming style.
Change-Id: I501bc99dc402039e630c47917a086a0bb382782c
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4747
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Tested-by: jenkins
Diffstat (limited to 'src/target/cortex_a.c')
-rw-r--r-- | src/target/cortex_a.c | 158 |
1 files changed, 3 insertions, 155 deletions
diff --git a/src/target/cortex_a.c b/src/target/cortex_a.c index 77859d3e..73fb8e0f 100644 --- a/src/target/cortex_a.c +++ b/src/target/cortex_a.c @@ -71,10 +71,6 @@ 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_dap_read_coreregister_u32(struct target *target, - uint32_t *value, int regnum); -static int cortex_a_dap_write_coreregister_u32(struct target *target, - uint32_t value, int regnum); 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, @@ -307,147 +303,6 @@ static int cortex_a_exec_opcode(struct target *target, return retval; } -static int cortex_a_dap_read_coreregister_u32(struct target *target, - uint32_t *value, int regnum) -{ - int retval = ERROR_OK; - uint8_t reg = regnum&0xFF; - uint32_t dscr = 0; - struct armv7a_common *armv7a = target_to_armv7a(target); - - if (reg > 17) - return retval; - - if (reg < 15) { - /* Rn to DCCTX, "MCR p14, 0, Rn, c0, c5, 0" 0xEE00nE15 */ - retval = cortex_a_exec_opcode(target, - ARMV4_5_MCR(14, 0, reg, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - } else if (reg == 15) { - /* "MOV r0, r15"; then move r0 to DCCTX */ - retval = cortex_a_exec_opcode(target, 0xE1A0000F, &dscr); - if (retval != ERROR_OK) - return retval; - retval = cortex_a_exec_opcode(target, - ARMV4_5_MCR(14, 0, 0, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - } else { - /* "MRS r0, CPSR" or "MRS r0, SPSR" - * then move r0 to DCCTX - */ - retval = cortex_a_exec_opcode(target, ARMV4_5_MRS(0, reg & 1), &dscr); - if (retval != ERROR_OK) - return retval; - retval = cortex_a_exec_opcode(target, - ARMV4_5_MCR(14, 0, 0, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - } - - /* Wait for DTRRXfull then read DTRRTX */ - int64_t then = timeval_ms(); - while ((dscr & DSCR_DTR_TX_FULL) == 0) { - retval = mem_ap_read_atomic_u32(armv7a->debug_ap, - armv7a->debug_base + CPUDBG_DSCR, &dscr); - if (retval != ERROR_OK) - return retval; - if (timeval_ms() > then + 1000) { - LOG_ERROR("Timeout waiting for cortex_a_exec_opcode"); - return ERROR_FAIL; - } - } - - retval = mem_ap_read_atomic_u32(armv7a->debug_ap, - armv7a->debug_base + CPUDBG_DTRTX, value); - LOG_DEBUG("read DCC 0x%08" PRIx32, *value); - - return retval; -} - -__attribute__((unused)) -static int cortex_a_dap_write_coreregister_u32(struct target *target, - uint32_t value, int regnum) -{ - int retval = ERROR_OK; - uint8_t Rd = regnum&0xFF; - uint32_t dscr; - struct armv7a_common *armv7a = target_to_armv7a(target); - - LOG_DEBUG("register %i, value 0x%08" PRIx32, regnum, value); - - /* Check that DCCRX is not full */ - retval = mem_ap_read_atomic_u32(armv7a->debug_ap, - armv7a->debug_base + CPUDBG_DSCR, &dscr); - if (retval != ERROR_OK) - return retval; - if (dscr & DSCR_DTR_RX_FULL) { - LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32, dscr); - /* Clear DCCRX with MRC(p14, 0, Rd, c0, c5, 0), opcode 0xEE100E15 */ - retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - } - - if (Rd > 17) - return retval; - - /* Write DTRRX ... sets DSCR.DTRRXfull but exec_opcode() won't care */ - LOG_DEBUG("write DCC 0x%08" PRIx32, value); - retval = mem_ap_write_u32(armv7a->debug_ap, - armv7a->debug_base + CPUDBG_DTRRX, value); - if (retval != ERROR_OK) - return retval; - - if (Rd < 15) { - /* DCCRX to Rn, "MRC p14, 0, Rn, c0, c5, 0", 0xEE10nE15 */ - retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, Rd, 0, 5, 0), - &dscr); - - if (retval != ERROR_OK) - return retval; - } else if (Rd == 15) { - /* DCCRX to R0, "MRC p14, 0, R0, c0, c5, 0", 0xEE100E15 - * then "mov r15, r0" - */ - retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - retval = cortex_a_exec_opcode(target, 0xE1A0F000, &dscr); - if (retval != ERROR_OK) - return retval; - } else { - /* DCCRX to R0, "MRC p14, 0, R0, c0, c5, 0", 0xEE100E15 - * then "MSR CPSR_cxsf, r0" or "MSR SPSR_cxsf, r0" (all fields) - */ - retval = cortex_a_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), - &dscr); - if (retval != ERROR_OK) - return retval; - retval = cortex_a_exec_opcode(target, ARMV4_5_MSR_GP(0, 0xF, Rd & 1), - &dscr); - if (retval != ERROR_OK) - return retval; - - /* "Prefetch flush" after modifying execution status in CPSR */ - if (Rd == 16) { - retval = cortex_a_exec_opcode(target, - ARMV4_5_MCR(15, 0, 0, 7, 5, 4), - &dscr); - if (retval != ERROR_OK) - return retval; - } - } - - return retval; -} - /* Write to memory mapped registers directly with no cache or mmu handling */ static int cortex_a_dap_write_memap_register_u32(struct target *target, uint32_t address, @@ -1158,12 +1013,11 @@ static int cortex_a_resume(struct target *target, int current, static int cortex_a_debug_entry(struct target *target) { - uint32_t spsr, dscr; + uint32_t dscr; int retval = ERROR_OK; struct cortex_a_common *cortex_a = target_to_cortex_a(target); struct armv7a_common *armv7a = target_to_armv7a(target); struct arm *arm = &armv7a->arm; - struct reg *reg; LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a->cpudbg_dscr); @@ -1206,16 +1060,10 @@ static int cortex_a_debug_entry(struct target *target) return retval; if (arm->spsr) { - /* read Saved PSR */ - retval = cortex_a_dap_read_coreregister_u32(target, &spsr, 17); - /* store current spsr */ + /* read SPSR */ + retval = arm_dpm_read_reg(&armv7a->dpm, arm->spsr, 17); if (retval != ERROR_OK) return retval; - - reg = arm->spsr; - buf_set_u32(reg->value, 0, 32, spsr); - reg->valid = 1; - reg->dirty = 0; } #if 0 |