diff options
Diffstat (limited to 'src/svf')
| -rw-r--r-- | src/svf/svf.c | 54 |
1 files changed, 34 insertions, 20 deletions
diff --git a/src/svf/svf.c b/src/svf/svf.c index a25b3580..5b96971c 100644 --- a/src/svf/svf.c +++ b/src/svf/svf.c @@ -1,22 +1,21 @@ -/*************************************************************************** - * Copyright (C) 2009 by Simon Qian * - * SimonQian@SimonQian.com * - * * - * This program is free software; you can redistribute it and/or modify * - * it under the terms of the GNU General Public License as published by * - * the Free Software Foundation; either version 2 of the License, or * - * (at your option) any later version. * - * * - * This program is distributed in the hope that it will be useful, * - * but WITHOUT ANY WARRANTY; without even the implied warranty of * - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * - * GNU General Public License for more details. * - * * - * You should have received a copy of the GNU General Public License * - * along with this program; if not, write to the * - * Free Software Foundation, Inc., * - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - ***************************************************************************/ +/* + * Copyright (C) 2009 by Simon Qian + * SimonQian@SimonQian.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ /* The specification for SVF is available here: @@ -98,7 +97,22 @@ typedef struct tap_state_t paths[8]; }svf_statemove_t; -svf_statemove_t svf_statemoves[] = +/* + * These paths are from the SVF specification for the STATE command, to be + * used when the STATE command only includes the final state. The first + * element of the path is the "from" (current) state, and the last one is + * the "to" (target) state. + * + * All specified paths are the shortest ones in the JTAG spec, and are thus + * not (!!) exact matches for the paths used elsewhere in OpenOCD. Note + * that PAUSE-to-PAUSE transitions all go through UPDATE and then CAPTURE, + * which has specific effects on the various registers; they are not NOPs. + * + * Paths to RESET are disabled here. As elsewhere in OpenOCD, and in XSVF + * and many SVF implementations, we don't want to risk missing that state. + * To get to RESET, always we ignore the current state. + */ +static const svf_statemove_t svf_statemoves[] = { // from to num_of_moves, paths[8] // {TAP_RESET, TAP_RESET, 1, {TAP_RESET}}, |