Arm DPv1 and DPv2 support banked registers by setting the bank in
field DPBANKSEL of register DP_SELECT.
Old ST-Link firmware don't support banked registers and setting a
bank other than bank zero on DPv1 or DPv2 cause issues in the
firmware because it cannot set back bank zero to read CTRL/STAT.
New ST-Link firmware mask away DPBANKSEL bits while writing in
DP_SELECT but support banked register using the same packed method
used by OpenOCD:
#define BANK_REG(bank, reg) (((bank) << 4) | (reg))
Add a new macro STLINK_F_HAS_DPBANKSEL for firmware that support
arm DPv1 and DPv2, plus trigger an error if banked registers are
requested on old firmware.
Prevent changing DPBANKSEL on old firmware.
Log a debug message when changing DPBANKSEL will be ignored.
Change-Id: Iaa592517831d63f8da2290db54f6b32504e3081b
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4978
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
#define STLINK_F_HAS_DAP_REG BIT(5)
#define STLINK_F_QUIRK_JTAG_DP_READ BIT(6)
#define STLINK_F_HAS_AP_INIT BIT(7)
#define STLINK_F_HAS_DAP_REG BIT(5)
#define STLINK_F_QUIRK_JTAG_DP_READ BIT(6)
#define STLINK_F_HAS_AP_INIT BIT(7)
+#define STLINK_F_HAS_DPBANKSEL BIT(8)
/* aliases */
#define STLINK_F_HAS_TARGET_VOLT STLINK_F_HAS_TRACE
/* aliases */
#define STLINK_F_HAS_TARGET_VOLT STLINK_F_HAS_TRACE
if (h->version.jtag >= 28)
flags |= STLINK_F_HAS_AP_INIT;
if (h->version.jtag >= 28)
flags |= STLINK_F_HAS_AP_INIT;
+ /* Banked regs (DPv1 & DPv2) support from V2J32 */
+ if (h->version.jtag >= 32)
+ flags |= STLINK_F_HAS_DPBANKSEL;
+
break;
case 3:
/* all STLINK-V3 use api-v3 */
break;
case 3:
/* all STLINK-V3 use api-v3 */
/* API required to init AP before any AP access */
flags |= STLINK_F_HAS_AP_INIT;
/* API required to init AP before any AP access */
flags |= STLINK_F_HAS_AP_INIT;
+ /* Banked regs (DPv1 & DPv2) support from V3J2 */
+ if (h->version.jtag >= 2)
+ flags |= STLINK_F_HAS_DPBANKSEL;
+
uint32_t dummy;
int retval;
uint32_t dummy;
int retval;
+ if (!(stlink_dap_handle->version.flags & STLINK_F_HAS_DPBANKSEL))
+ if (reg & 0x000000F0) {
+ LOG_ERROR("Banked DP registers not supported in current STLink FW");
+ return ERROR_COMMAND_NOTFOUND;
+ }
+
retval = stlink_dap_check_reconnect(dap);
if (retval != ERROR_OK)
return retval;
retval = stlink_dap_check_reconnect(dap);
if (retval != ERROR_OK)
return retval;
+ if (!(stlink_dap_handle->version.flags & STLINK_F_HAS_DPBANKSEL))
+ if (reg & 0x000000F0) {
+ LOG_ERROR("Banked DP registers not supported in current STLink FW");
+ return ERROR_COMMAND_NOTFOUND;
+ }
+
+ if (reg == DP_SELECT && (data & DP_SELECT_DPBANK) != 0) {
+ /* ignored if STLINK_F_HAS_DPBANKSEL, not properly managed otherwise */
+ LOG_DEBUG("Ignoring DPBANKSEL while write SELECT");
+ data &= ~DP_SELECT_DPBANK;
+ }
+
retval = stlink_dap_check_reconnect(dap);
if (retval != ERROR_OK)
return retval;
retval = stlink_dap_check_reconnect(dap);
if (retval != ERROR_OK)
return retval;
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