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arm_adi_v5: add dap apreg command for AP register read/write 

A developer tool: Direct access to AP registers can be useful
for handling vendor specific AP like Freescale Kinetis MDM or Atmel SMAP.

Change-Id: Ie2c7160fc6b2e398513eb23e1e52cbb52b88d9bd
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2777
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Tested-by: jenkins
__archive__
Tomas Vanek 2015-04-24 07:33:50 +02:00 committed by Andreas Fritiofson
parent 7a0473bbb6
commit f4496b25e3
2 changed files with 53 additions and 0 deletions
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6
doc/openocd.texi
View File

@ -7836,6 +7836,12 @@ Displays ID register from AP @var{num},
defaulting to the currently selected AP.
@end deffn
@deffn Command {dap apreg} ap_num reg [value]
Displays content of a register @var{reg} from AP @var{ap_num}
or set a new value @var{value}.
@var{reg} is byte address of a word register, 0, 4, 8 ... 0xfc.
@end deffn
@deffn Command {dap apsel} [num]
Select AP @var{num}, defaulting to 0.
@end deffn

47
src/target/arm_adi_v5.c
View File

@ -1556,6 +1556,45 @@ COMMAND_HANDLER(dap_apid_command)
return retval;
}
COMMAND_HANDLER(dap_apreg_command)
{
struct target *target = get_current_target(CMD_CTX);
struct arm *arm = target_to_arm(target);
struct adiv5_dap *dap = arm->dap;
uint32_t apsel, reg, value;
int retval;
if (CMD_ARGC < 2 || CMD_ARGC > 3)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], apsel);
/* AP address is in bits 31:24 of DP_SELECT */
if (apsel >= 256)
return ERROR_COMMAND_SYNTAX_ERROR;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], reg);
if (reg >= 256 || (reg & 3))
return ERROR_COMMAND_SYNTAX_ERROR;
if (CMD_ARGC == 3) {
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], value);
retval = dap_queue_ap_write(dap_ap(dap, apsel), reg, value);
} else {
retval = dap_queue_ap_read(dap_ap(dap, apsel), reg, &value);
}
if (retval == ERROR_OK)
retval = dap_run(dap);
if (retval != ERROR_OK)
return retval;
if (CMD_ARGC == 2)
command_print(CMD_CTX, "0x%08" PRIx32, value);
return retval;
}
COMMAND_HANDLER(dap_ti_be_32_quirks_command)
{
struct target *target = get_current_target(CMD_CTX);
@ -1615,6 +1654,14 @@ static const struct command_registration dap_commands[] = {
"(default currently selected AP)",
.usage = "[ap_num]",
},
{
.name = "apreg",
.handler = dap_apreg_command,
.mode = COMMAND_EXEC,
.help = "read/write a register from AP "
"(reg is byte address of a word register, like 0 4 8...)",
.usage = "ap_num reg [value]",
},
{
.name = "baseaddr",
.handler = dap_baseaddr_command,