diff options
Diffstat (limited to 'src/xsvf')
| -rw-r--r-- | src/xsvf/Makefile.am | 1 | ||||
| -rw-r--r-- | src/xsvf/xsvf.c | 79 |
2 files changed, 46 insertions, 34 deletions
diff --git a/src/xsvf/Makefile.am b/src/xsvf/Makefile.am index 847fb807..fd9f8c3f 100644 --- a/src/xsvf/Makefile.am +++ b/src/xsvf/Makefile.am @@ -1,6 +1,7 @@ AM_CPPFLAGS = \ -I$(top_srcdir)/src/server \ -I$(top_srcdir)/src/helper \ + -I$(top_srcdir)/src/svf \ -I$(top_srcdir)/src/jtag METASOURCES = AUTO diff --git a/src/xsvf/xsvf.c b/src/xsvf/xsvf.c index 083e6e32..d00c47c6 100644 --- a/src/xsvf/xsvf.c +++ b/src/xsvf/xsvf.c @@ -42,6 +42,7 @@ #include "xsvf.h" #include "jtag.h" +#include "svf.h" /* XSVF commands, from appendix B of xapp503.pdf */ @@ -432,7 +433,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha /* See page 19 of XSVF spec regarding opcode "XSDR" */ if (xruntest) { - jtag_add_statemove(TAP_IDLE); + result = svf_add_statemove(TAP_IDLE); if (runtest_requires_tck) jtag_add_clocks(xruntest); @@ -440,7 +441,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha jtag_add_sleep(xruntest); } else if (xendir != TAP_DRPAUSE) /* we are already in TAP_DRPAUSE */ - jtag_add_statemove(xenddr); + result = svf_add_statemove(xenddr); } break; @@ -499,32 +500,37 @@ 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)); - /* there is no need for the lookahead code that was here since we - queue up the jtag commands anyway. This is a simple way to handle - the XSTATE. - */ + /* NOTE: the current state is SVF-stable! */ + + /* no change == NOP */ + if (mystate == cmd_queue_cur_state + && mystate != TAP_RESET) + break; - if (jtag_add_statemove(mystate) != ERROR_OK) + /* Hand off to SVF? */ + if (svf_tap_state_is_stable(mystate)) { - /* For special states known as stable states - (Test-Logic-Reset, Run-Test/Idle, Pause-DR, Pause- IR), - an XSVF interpreter follows predefined TAP state paths - when the starting state is a stable state and when the - XSTATE specifies a new stable state (see the STATE - command in the [Ref 5] for the TAP state paths between - stable states). For non-stable states, XSTATE should - specify a state that is only one TAP state transition - distance from the current TAP state to avoid undefined - TAP state paths. A sequence of multiple XSTATE commands - can be issued to transition the TAP through a specific - state path. - */ - - LOG_ERROR("XSTATE %s is not reachable from current state %s in one clock cycle", - tap_state_name(mystate), - tap_state_name(cmd_queue_cur_state) -); + result = svf_add_statemove(mystate); + if (result != ERROR_OK) + unsupported = 1; + break; } + + /* + * 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. + */ + LOG_ERROR("XSVF: 'XSTATE %s' ... NYET", + tap_state_name(mystate)); + unsupported = 1; } break; @@ -708,9 +714,10 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha } else { - jtag_add_statemove(wait_state); + /* FIXME handle statemove errors ... */ + result = svf_add_statemove(wait_state); jtag_add_sleep(delay); - jtag_add_statemove(end_state); + result = svf_add_statemove(end_state); } } break; @@ -755,19 +762,22 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha * be issuing a number of clocks in this state. This set of allowed states is also * determined by the SVF RUNTEST command's allowed states. */ - if (wait_state != TAP_IRPAUSE && wait_state != TAP_DRPAUSE && wait_state != TAP_RESET && wait_state != TAP_IDLE) + if (!svf_tap_state_is_stable(wait_state)) { - LOG_ERROR("illegal XWAITSTATE wait_state: \"%s\"", tap_state_name(wait_state)); + LOG_ERROR("illegal XWAITSTATE wait_state: \"%s\"", + tap_state_name(wait_state)); unsupported = 1; + /* REVISIT "break" so we won't run? */ } - jtag_add_statemove(wait_state); + /* FIXME handle statemove errors ... */ + result = svf_add_statemove(wait_state); jtag_add_clocks(clock_count); jtag_add_sleep(usecs); - jtag_add_statemove(end_state); + result = svf_add_statemove(end_state); } break; @@ -806,6 +816,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha break; } + /* NOTE: loop_state must be stable! */ loop_state = xsvf_to_tap(state); loop_clocks = be_to_h_u32(clock_buf); loop_usecs = be_to_h_u32(usecs_buf); @@ -839,7 +850,7 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha { scan_field_t field; - jtag_add_statemove(loop_state); + result = svf_add_statemove(loop_state); jtag_add_clocks(loop_clocks); jtag_add_sleep(loop_usecs); @@ -917,8 +928,8 @@ static int handle_xsvf_command(struct command_context_s *cmd_ctx, char *cmd, cha LOG_DEBUG("xsvf failed, setting taps to reasonable state"); /* upon error, return the TAPs to a reasonable state */ - jtag_add_statemove(TAP_IDLE); - jtag_execute_queue(); + result = svf_add_statemove(TAP_IDLE); + result = jtag_execute_queue(); break; } } |