diff options
| -rw-r--r-- | src/xsvf/xsvf.c | 118 |
1 files changed, 30 insertions, 88 deletions
diff --git a/src/xsvf/xsvf.c b/src/xsvf/xsvf.c index 0e19b65c..17dec493 100644 --- a/src/xsvf/xsvf.c +++ b/src/xsvf/xsvf.c @@ -53,6 +53,7 @@ #include <sys/stat.h> #include <fcntl.h> #include <string.h> +#include <assert.h> #include <sys/time.h> #include <time.h> @@ -173,46 +174,52 @@ static tap_state_t xsvf_to_tap( int xsvf_state ) } -/* xsvf has it's own definition of a statemove. This needs +/** + * Function xsvf_add_statemove + * moves from the current state to the goal \a state. This needs * to be handled according to the xsvf spec, which has nothing * to do with the JTAG spec or OpenOCD as such. * * Implemented via jtag_add_pathmove(). */ -static void xsvf_add_statemove(tap_state_t state) +static void xsvf_add_statemove(tap_state_t goal_state) { - tap_state_t moves[7]; /* max # of transitions */ - tap_state_t curstate = cmd_queue_cur_state; + tap_state_t moves[8]; + tap_state_t cur_state = cmd_queue_cur_state; int i; + int tms_bits; + int tms_count; - u8 move = tap_get_tms_path(cmd_queue_cur_state, state); + LOG_DEBUG( "cur_state=%s goal_state=%s", + tap_state_name(cur_state), + tap_state_name(goal_state) ); - if (state != TAP_RESET && state==cmd_queue_cur_state) + if (goal_state==cur_state ) return; - if(state==TAP_RESET) + if( goal_state==TAP_RESET ) { jtag_add_tlr(); return; } - for (i=0; i<7; i++) + tms_bits = tap_get_tms_path(cur_state, goal_state); + tms_count = tap_get_tms_path_len(cur_state, goal_state); + + assert( (unsigned) tms_count < DIM(moves) ); + + for (i=0; i<tms_count; i++, tms_bits>>=1) { - int j = (move >> i) & 1; - if (j) - { - curstate = tap_state_transition(curstate, true); - } - else - { - curstate = tap_state_transition(curstate, false); - } - moves[i] = curstate; + bool bit = tms_bits & 1; + + cur_state = tap_state_transition(cur_state, bit); + moves[i] = cur_state; } - jtag_add_pathmove(7, moves); + jtag_add_pathmove(tms_count, moves); } + int xsvf_register_commands(struct command_context_s *cmd_ctx) { register_command(cmd_ctx, NULL, "xsvf", handle_xsvf_command, @@ -236,38 +243,6 @@ static int xsvf_read_buffer(int num_bits, int fd, u8* buf) } -static int xsvf_read_xstates(int fd, tap_state_t *path, int max_path, int *path_len) -{ - char c; - u8 uc; - - while ((read(fd, &c, 1) > 0) && (c == XSTATE)) - { - tap_state_t mystate; - - if (*path_len > max_path) - { - LOG_WARNING("XSTATE path longer than max_path"); - break; - } - if (read(fd, &uc, 1) < 0) - { - return ERROR_XSVF_EOF; - } - - mystate = xsvf_to_tap(uc); - - LOG_DEBUG("XSTATE %02X %s", uc, tap_state_name(mystate) ); - - path[(*path_len)++] = mystate; - } - - lseek(fd, -1, SEEK_CUR); - - return ERROR_OK; -} - - static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) { u8 *dr_out_buf = NULL; /* from host to device (TDI) */ @@ -477,7 +452,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha TAP_IDLE, }; - jtag_add_pathmove( sizeof(exception_path)/sizeof(exception_path[0]), exception_path); + jtag_add_pathmove( DIM(exception_path), exception_path ); if (verbose) LOG_USER("%s mismatch, xsdrsize=%d retry=%d", op_name, xsdrsize, attempt); @@ -570,8 +545,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha case XSTATE: { tap_state_t mystate; - tap_state_t* path; - int path_len; + u8 uc; if (read(xsvf_fd, &uc, 1) < 0) { @@ -583,38 +557,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha LOG_DEBUG("XSTATE 0x%02X %s", uc, tap_state_name(mystate) ); - path = calloc(XSTATE_MAX_PATH, 4); - path_len = 1; - - path[0] = mystate; - if (xsvf_read_xstates(xsvf_fd, path, XSTATE_MAX_PATH, &path_len) != ERROR_OK) - do_abort = 1; - else - { - int i,lasti; - - /* here the trick is that jtag_add_pathmove() must end in a stable - * state, so we must only invoke jtag_add_tlr() when we absolutely - * have to - */ - for(i=0,lasti=0; i<path_len; i++) - { - if(path[i]==TAP_RESET) - { - if(i>lasti) - { - jtag_add_pathmove(i-lasti,path+lasti); - } - lasti=i+1; - jtag_add_tlr(); - } - } - if(i>=lasti) - { - jtag_add_pathmove(i-lasti, path+lasti); - } - } - free(path); + xsvf_add_statemove( mystate ); } break; @@ -710,7 +653,6 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha field.in_handler = NULL; - if (tap == NULL) jtag_add_plain_ir_scan(1, &field, my_end_state); @@ -761,7 +703,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha comment[sizeof(comment)-1] = 0; /* regardless, terminate */ if (verbose) - LOG_USER("%s", comment); + LOG_USER("\"# %s\"", comment); } break; |