The API of hla have been defined from ST-Link basic operations.
By chance, all the current implementation of hla (st-link, ti-icdi
and nulink) share the same way to handle the parameter 'num' of
the API read_reg() and write_reg(), that is simply using it to
initialize the field REGSEL (bits [6:0]) of armv7m Debug Core
Register Selector Register (DCRSR).
Add a comment in the API definition to highlight this, in case it
get used by a further hla implementation, then rename as 'regsel'
the 'num' parameter.
Change-Id: I4b6a2c7d78b4fc4de2b9b2bdba065414b15c6ba3
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/5882
Reviewed-by: Edward Fewell <edwardfewell@hotmail.com>
Tested-by: jenkins
Reviewed-by: Zale Yu
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
return res;
}
-static int nulink_usb_read_reg(void *handle, int num, uint32_t *val)
+static int nulink_usb_read_reg(void *handle, unsigned int regsel, uint32_t *val)
{
struct nulink_usb_handle_s *h = handle;
h->cmdbuf[h->cmdidx] = 0;
h->cmdidx += 1;
/* u32Addr */
- h_u32_to_le(h->cmdbuf + h->cmdidx, num);
+ h_u32_to_le(h->cmdbuf + h->cmdidx, regsel);
h->cmdidx += 4;
/* u32Data */
h_u32_to_le(h->cmdbuf + h->cmdidx, 0);
return res;
}
-static int nulink_usb_write_reg(void *handle, int num, uint32_t val)
+static int nulink_usb_write_reg(void *handle, unsigned int regsel, uint32_t val)
{
struct nulink_usb_handle_s *h = handle;
h->cmdbuf[h->cmdidx] = 0;
h->cmdidx += 1;
/* u32Addr */
- h_u32_to_le(h->cmdbuf + h->cmdidx, num);
+ h_u32_to_le(h->cmdbuf + h->cmdidx, regsel);
h->cmdidx += 4;
/* u32Data */
h_u32_to_le(h->cmdbuf + h->cmdidx, val);
}
/** */
-static int stlink_usb_read_reg(void *handle, int num, uint32_t *val)
+static int stlink_usb_read_reg(void *handle, unsigned int regsel, uint32_t *val)
{
int res;
struct stlink_usb_handle_s *h = handle;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_READREG;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_READREG;
- h->cmdbuf[h->cmdidx++] = num;
+ h->cmdbuf[h->cmdidx++] = regsel;
if (h->version.jtag_api == STLINK_JTAG_API_V1) {
res = stlink_usb_xfer_noerrcheck(handle, h->databuf, 4);
}
/** */
-static int stlink_usb_write_reg(void *handle, int num, uint32_t val)
+static int stlink_usb_write_reg(void *handle, unsigned int regsel, uint32_t val)
{
struct stlink_usb_handle_s *h = handle;
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV1_WRITEREG;
else
h->cmdbuf[h->cmdidx++] = STLINK_DEBUG_APIV2_WRITEREG;
- h->cmdbuf[h->cmdidx++] = num;
+ h->cmdbuf[h->cmdidx++] = regsel;
h_u32_to_le(h->cmdbuf+h->cmdidx, val);
h->cmdidx += 4;
return ERROR_OK;
}
-static int icdi_usb_read_reg(void *handle, int num, uint32_t *val)
+static int icdi_usb_read_reg(void *handle, unsigned int regsel, uint32_t *val)
{
int result;
struct icdi_usb_handle_s *h = handle;
char cmd[10];
- snprintf(cmd, sizeof(cmd), "p%x", num);
+ snprintf(cmd, sizeof(cmd), "p%x", regsel);
result = icdi_send_cmd(handle, cmd);
if (result != ERROR_OK)
return result;
return result;
}
-static int icdi_usb_write_reg(void *handle, int num, uint32_t val)
+static int icdi_usb_write_reg(void *handle, unsigned int regsel, uint32_t val)
{
int result;
char cmd[20];
uint8_t buf[4];
h_u32_to_le(buf, val);
- int cmd_len = snprintf(cmd, sizeof(cmd), "P%x=", num);
+ int cmd_len = snprintf(cmd, sizeof(cmd), "P%x=", regsel);
hexify(cmd + cmd_len, buf, 4, sizeof(cmd));
result = icdi_send_cmd(handle, cmd);
int (*step)(void *handle);
/** */
int (*read_regs)(void *handle);
- /** */
- int (*read_reg)(void *handle, int num, uint32_t *val);
- /** */
- int (*write_reg)(void *handle, int num, uint32_t val);
+ /**
+ * Read one register from the target
+ *
+ * @param handle A pointer to the device-specific handle
+ * @param regsel Register selection index compatible with all the
+ * values allowed by armv7m DCRSR.REGSEL
+ * @param val A pointer to retrieve the register value
+ * @returns ERROR_OK on success, or an error code on failure.
+ */
+ int (*read_reg)(void *handle, unsigned int regsel, uint32_t *val);
+ /**
+ * Write one register to the target
+ * @param handle A pointer to the device-specific handle
+ * @param regsel Register selection index compatible with all the
+ * values allowed by armv7m DCRSR.REGSEL
+ * @param val The value to be written in the register
+ * @returns ERROR_OK on success, or an error code on failure.
+ */
+ int (*write_reg)(void *handle, unsigned int regsel, uint32_t val);
/** */
int (*read_mem)(void *handle, uint32_t addr, uint32_t size,
uint32_t count, uint8_t *buffer);