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stlink: handle read/write FPU registers in HLA API 

Old stlink firmware in stlink V1 and stlink V2 pre-J15 do not
handle FPU registers in the read_reg() and write_reg() API.

Add code to be compatible with the new API of OpenOCD.

Change-Id: Ib0439c5294b6911ea75efe8c7fa085b014317a4b
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5883
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
This commit is contained in:
Antonio Borneo 2020-10-25 17:35:45 +01:00
parent be631eed16
commit 4d336e8ffb
1 changed files with 21 additions and 0 deletions
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21
src/jtag/drivers/stlink_usb.c
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@ -324,6 +324,9 @@ struct stlink_usb_handle_s {
/* aliases */
#define STLINK_F_HAS_TARGET_VOLT STLINK_F_HAS_TRACE
#define STLINK_F_HAS_FPU_REG STLINK_F_HAS_GETLASTRWSTATUS2
#define STLINK_REGSEL_IS_FPU(x) ((x) > 0x1F)
struct speed_map {
int speed;
@ -2023,6 +2026,15 @@ static int stlink_usb_read_reg(void *handle, unsigned int regsel, uint32_t *val)
assert(handle != NULL);
if (STLINK_REGSEL_IS_FPU(regsel) && !(h->version.flags & STLINK_F_HAS_FPU_REG)) {
res = stlink_usb_write_debug_reg(h, DCB_DCRSR, regsel & 0x7f);
if (res != ERROR_OK)
return res;
/* FIXME: poll DHCSR.S_REGRDY before read DCRDR */
return stlink_usb_v2_read_debug_reg(h, DCB_DCRDR, val);
}
stlink_usb_init_buffer(handle, h->rx_ep, h->version.jtag_api == STLINK_JTAG_API_V1 ? 4 : 8);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;
@ -2054,6 +2066,15 @@ static int stlink_usb_write_reg(void *handle, unsigned int regsel, uint32_t val)
assert(handle != NULL);
if (STLINK_REGSEL_IS_FPU(regsel) && !(h->version.flags & STLINK_F_HAS_FPU_REG)) {
int res = stlink_usb_write_debug_reg(h, DCB_DCRDR, val);
if (res != ERROR_OK)
return res;
return stlink_usb_write_debug_reg(h, DCB_DCRSR, DCRSR_WnR | (regsel & 0x7f));
/* FIXME: poll DHCSR.S_REGRDY after write DCRSR */
}
stlink_usb_init_buffer(handle, h->rx_ep, 2);
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_COMMAND;