#define XSTATE_MAX_PATH 12
-static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
static int xsvf_fd = 0;
-int xsvf_register_commands(struct command_context_s *cmd_ctx)
-{
- register_command(cmd_ctx, NULL, "xsvf", handle_xsvf_command,
- COMMAND_EXEC, "run xsvf <file> [virt2] [quiet]");
-
- return ERROR_OK;
-}
-
static int xsvf_read_buffer(int num_bits, int fd, uint8_t* buf)
{
int num_bytes;
}
-static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+COMMAND_HANDLER(handle_xsvf_command)
{
uint8_t *dr_out_buf = NULL; /* from host to device (TDI) */
uint8_t *dr_in_buf = NULL; /* from device to host (TDO) */
int tdo_mismatch = 0;
int result;
int verbose = 1;
- char* filename;
- int runtest_requires_tck = 0; /* a flag telling whether to clock TCK during waits, or simply sleep, controled by virt2 */
+ bool collecting_path = false;
+ tap_state_t path[XSTATE_MAX_PATH];
+ unsigned pathlen = 0;
+
+ /* a flag telling whether to clock TCK during waits,
+ * or simply sleep, controled by virt2
+ */
+ int runtest_requires_tck = 0;
/* use NULL to indicate a "plain" xsvf file which accounts for
additional devices in the scan chain, otherwise the device
that should be affected
*/
- jtag_tap_t *tap = NULL;
+ struct jtag_tap *tap = NULL;
if (argc < 2)
{
return ERROR_FAIL;
}
- filename = args[1]; /* we mess with args starting point below, snapshot filename here */
+ /* we mess with args starting point below, snapshot filename here */
+ const char *filename = args[1];
if (strcmp(args[0], "plain") != 0)
{
while (read(xsvf_fd, &opcode, 1) > 0)
{
- /* record the position of the just read opcode within the file */
+ /* record the position of this opcode within the file */
file_offset = lseek(xsvf_fd, 0, SEEK_CUR) - 1;
+ /* maybe collect another state for a pathmove();
+ * or terminate a path.
+ */
+ if (collecting_path) {
+ tap_state_t mystate;
+ uint8_t uc;
+
+ switch (opcode) {
+ case XCOMMENT:
+ /* ignore/show comments between XSTATE ops */
+ break;
+ case XSTATE:
+ /* try to collect another transition */
+ if (pathlen == XSTATE_MAX_PATH) {
+ LOG_ERROR("XSVF: path too long");
+ do_abort = 1;
+ break;
+ }
+
+ if (read(xsvf_fd, &uc, 1) < 0)
+ {
+ do_abort = 1;
+ break;
+ }
+
+ mystate = xsvf_to_tap(uc);
+ path[pathlen++] = mystate;
+
+ LOG_DEBUG("XSTATE 0x%02X %s", uc,
+ tap_state_name(mystate));
+
+ /* If path is incomplete, collect more */
+ if (!svf_tap_state_is_stable(mystate))
+ continue;
+
+ /* Else execute the path transitions we've
+ * collected so far.
+ *
+ * NOTE: Punting on the saved path is not
+ * strictly correct, but we must to do this
+ * unless jtag_add_pathmove() stops rejecting
+ * paths containing RESET. This is probably
+ * harmless, since there aren't many options
+ * for going from a stable state to reset;
+ * at the worst, we may issue extra clocks
+ * once we get to RESET.
+ */
+ if (mystate == TAP_RESET) {
+ LOG_WARNING("XSVF: dodgey RESET");
+ path[0] = mystate;
+ }
+
+ /* FALL THROUGH */
+ default:
+ /* Execute the path we collected
+ *
+ * NOTE: OpenOCD requires something that XSVF
+ * doesn't: the last TAP state in the path
+ * must be stable. In practice, tools that
+ * create XSVF seem to follow that rule too.
+ */
+ collecting_path = false;
+
+ if (path[0] == TAP_RESET)
+ jtag_add_tlr();
+ else
+ jtag_add_pathmove(pathlen, path);
+
+ result = jtag_get_error();
+ if (result != ERROR_OK) {
+ LOG_ERROR("XSVF: pathmove error %d",
+ result);
+ do_abort = 1;
+ break;
+ }
+ continue;
+ }
+ }
+
switch (opcode)
{
case XCOMPLETE:
LOG_DEBUG("XSTATE 0x%02X %s", uc, tap_state_name(mystate));
+ if (mystate == TAP_INVALID) {
+ LOG_ERROR("XSVF: bad XSTATE %02x", uc);
+ do_abort = 1;
+ break;
+ }
+
/* NOTE: the current state is SVF-stable! */
/* no change == NOP */
/*
* A sequence of XSTATE transitions, each TAP
- * state adjacent to the previous one.
- *
- * NOTE: OpenOCD requires something that XSVF
- * doesn't: the last TAP state in the path
- * must be stable.
- *
- * FIXME Implement path collection; submit via
- * jtag_add_pathmove() after teaching it to
- * report errors.
+ * state adjacent to the previous one. Start
+ * collecting them.
*/
- LOG_ERROR("XSVF: 'XSTATE %s' ... NYET",
- tap_state_name(mystate));
- unsupported = 1;
+ collecting_path = true;
+ pathlen = 1;
+ path[0] = mystate;
}
break;
return ERROR_OK;
}
+int xsvf_register_commands(struct command_context_s *cmd_ctx)
+{
+ register_command(cmd_ctx, NULL, "xsvf",
+ &handle_xsvf_command, COMMAND_EXEC,
+ "run xsvf <file> [virt2] [quiet]");
+
+ return ERROR_OK;
+}
#if 0 /* this comment style used to try and keep uncrustify from adding * at begin of line */
Code Review / openocd.git / blobdiff