X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fjtag%2Fjtag.c;h=c8babdce96bdd2d7adb29c95540a2e8d563526ee;hp=a0f2d66b4b543cb8d4c6b41d7e4d32ae9ea24c82;hb=4ecf2c7dd83fb1123f8b62994e6fa6d729bb2073;hpb=64faff8f9ca599d00807d2df59e8852aaf687fbe diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c index a0f2d66b4b..c8babdce96 100644 --- a/src/jtag/jtag.c +++ b/src/jtag/jtag.c @@ -6,7 +6,7 @@ * oyvind.harboe@zylin.com * * * * Copyright (C) 2009 SoftPLC Corporation * - * http://softplc.com * + * http://softplc.com * * dick@softplc.com * * * * This program is free software; you can redistribute it and/or modify * @@ -28,7 +28,9 @@ #include "config.h" #endif +#define INCLUDE_JTAG_INTERFACE_H #include "jtag.h" +#include "minidriver.h" #ifdef HAVE_STRINGS_H #include @@ -37,7 +39,7 @@ int jtag_flush_queue_count; /* count # of flushes for profiling / debugging purposes */ -static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state), +static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state), int in_num_fields, scan_field_t *in_fields, tap_state_t state); /* note that this is not marked as static as it must be available from outside jtag.c for those @@ -70,26 +72,8 @@ const Jim_Nvp nvp_jtag_tap_event[] = { int jtag_trst = 0; int jtag_srst = 0; -#ifndef HAVE_JTAG_MINIDRIVER_H -struct jtag_callback_entry -{ - struct jtag_callback_entry *next; - - jtag_callback_t callback; - u8 *in; - jtag_callback_data_t data1; - jtag_callback_data_t data2; - jtag_callback_data_t data3; -}; - - -static struct jtag_callback_entry *jtag_callback_queue_head = NULL; -static struct jtag_callback_entry *jtag_callback_queue_tail = NULL; -#endif - - jtag_command_t *jtag_command_queue = NULL; -jtag_command_t **last_command_pointer = &jtag_command_queue; +static jtag_command_t **next_command_pointer = &jtag_command_queue; static jtag_tap_t *jtag_all_taps = NULL; enum reset_types jtag_reset_config = RESET_NONE; @@ -227,20 +211,12 @@ jtag_interface_t *jtag_interfaces[] = { NULL, }; -jtag_interface_t *jtag = NULL; +struct jtag_interface_s *jtag = NULL; /* configuration */ static jtag_interface_t *jtag_interface = NULL; int jtag_speed = 0; -/* forward declarations */ -//void jtag_add_pathmove(int num_states, tap_state_t *path); -//void jtag_add_runtest(int num_cycles, tap_state_t endstate); -//void jtag_add_end_state(tap_state_t endstate); -//void jtag_add_sleep(u32 us); -//int jtag_execute_queue(void); -static tap_state_t tap_state_by_name(const char *name); - /* jtag commands */ static int handle_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc); static int handle_jtag_speed_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc); @@ -421,40 +397,20 @@ int jtag_call_event_callbacks(enum jtag_event event) return ERROR_OK; } -/* returns a pointer to the pointer of the last command in queue - * this may be a pointer to the root pointer (jtag_command_queue) - * or to the next member of the last but one command - */ -jtag_command_t** jtag_get_last_command_p(void) -{ -/* jtag_command_t *cmd = jtag_command_queue; - - if (cmd) - while (cmd->next) - cmd = cmd->next; - else - return &jtag_command_queue; - - return &cmd->next;*/ - - return last_command_pointer; -} - - void jtag_queue_command(jtag_command_t * cmd) { - jtag_command_t **last_cmd; - - last_cmd = jtag_get_last_command_p(); + // this command goes on the end, so ensure the queue terminates + cmd->next = NULL; + jtag_command_t **last_cmd = next_command_pointer; + assert(NULL != last_cmd); + assert(NULL == *last_cmd); *last_cmd = cmd; - (*last_cmd)->next = NULL; - - last_command_pointer = &((*last_cmd)->next); + // store location where the next command pointer will be stored + next_command_pointer = &cmd->next; } - void* cmd_queue_alloc(size_t size) { cmd_queue_page_t **p_page = &cmd_queue_pages; @@ -531,6 +487,14 @@ void cmd_queue_free(void) cmd_queue_pages = NULL; } +void jtag_command_queue_reset(void) +{ + cmd_queue_free(); + + jtag_command_queue = NULL; + next_command_pointer = &jtag_command_queue; +} + static void jtag_prelude1(void) { if (jtag_trst == 1) @@ -554,7 +518,12 @@ static void jtag_prelude(tap_state_t state) cmd_queue_cur_state = cmd_queue_end_state; } -void jtag_add_ir_scan_noverify(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +void jtag_alloc_in_value32(scan_field_t *field) +{ + interface_jtag_alloc_in_value32(field); +} + +void jtag_add_ir_scan_noverify(int in_num_fields, const scan_field_t *in_fields, tap_state_t state) { int retval; jtag_prelude(state); @@ -566,16 +535,23 @@ void jtag_add_ir_scan_noverify(int in_num_fields, scan_field_t *in_fields, tap_s } +/** + * Generate an IR SCAN with a list of scan fields with one entry for each enabled TAP. + * + * If the input field list contains an instruction value for a TAP then that is used + * otherwise the TAP is set to bypass. + * + * TAPs for which no fields are passed are marked as bypassed for subsequent DR SCANs. + * + */ void jtag_add_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state) { if (jtag_verify&&jtag_verify_capture_ir) { - /* 8 x 32 bit id's is enough for all invoations */ + /* 8 x 32 bit id's is enough for all invocations */ for (int j = 0; j < in_num_fields; j++) { - in_fields[j].check_value=NULL; - in_fields[j].check_mask=NULL; /* if we are to run a verification of the ir scan, we need to get the input back. * We may have to allocate space if the caller didn't ask for the input back. */ @@ -590,82 +566,12 @@ void jtag_add_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t st } /** - * Generate a list of scan fields with one entry for each TAP. + * Duplicate the scan fields passed into the function into an IR SCAN command * - * If the input field list contains an instruction value for a TAP then that is used - * otherwise the TAP is set to bypass. + * This function assumes that the caller handles extra fields for bypassed TAPs * */ -int MINIDRIVER(interface_jtag_add_ir_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state) -{ - jtag_tap_t *tap; - int nth_tap; - - int num_taps = jtag_NumEnabledTaps(); - - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - scan_command_t * scan = cmd_queue_alloc(sizeof(scan_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_SCAN; - cmd->cmd.scan = scan; - - scan->ir_scan = true; - scan->num_fields = num_taps; /* one field per device */ - scan->fields = cmd_queue_alloc(num_taps * sizeof(scan_field_t)); - scan->end_state = state; - - nth_tap = -1; - tap = NULL; - for(;;){ - int found = 0; - - /* do this here so it is not forgotten */ - tap = jtag_NextEnabledTap(tap); - if( tap == NULL ){ - break; - } - nth_tap++; - - assert(nth_tap < num_taps); - - size_t scan_size = tap->ir_length; - scan->fields[nth_tap].tap = tap; - scan->fields[nth_tap].num_bits = scan_size; - scan->fields[nth_tap].in_value = NULL; /* do not collect input for tap's in bypass */ - - /* search the list */ - for (int j = 0; j < in_num_fields; j++) - { - if (tap == in_fields[j].tap) - { - found = 1; - scan->fields[nth_tap].in_value = in_fields[j].in_value; - scan->fields[nth_tap].out_value = buf_cpy(in_fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size); - - tap->bypass = 0; - break; - } - } - - if (!found) - { - /* if a tap isn't listed, set it to BYPASS */ - scan->fields[nth_tap].out_value = buf_set_ones(cmd_queue_alloc(CEIL(scan_size, 8)), scan_size); - tap->bypass = 1; - } - - /* update device information */ - buf_cpy(scan->fields[nth_tap].out_value, tap->cur_instr, scan_size); - } - - assert(nth_tap == (num_taps - 1)); - - return ERROR_OK; -} - -void jtag_add_plain_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +void jtag_add_plain_ir_scan(int in_num_fields, const scan_field_t *in_fields, tap_state_t state) { int retval; @@ -676,47 +582,18 @@ void jtag_add_plain_ir_scan(int in_num_fields, scan_field_t *in_fields, tap_stat jtag_error=retval; } -int MINIDRIVER(interface_jtag_add_plain_ir_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +void jtag_add_callback(jtag_callback1_t f, u8 *in) { - - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - scan_command_t * scan = cmd_queue_alloc(sizeof(scan_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_SCAN; - cmd->cmd.scan = scan; - - scan->ir_scan = true; - scan->num_fields = in_num_fields; - scan->fields = cmd_queue_alloc(in_num_fields * sizeof(scan_field_t)); - scan->end_state = state; - - for (int i = 0; i < in_num_fields; i++) - { - int num_bits = in_fields[i].num_bits; - int num_bytes = CEIL(in_fields[i].num_bits, 8); - scan->fields[i].tap = in_fields[i].tap; - scan->fields[i].num_bits = num_bits; - scan->fields[i].out_value = buf_cpy(in_fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits); - scan->fields[i].in_value = in_fields[i].in_value; - } - - return ERROR_OK; + interface_jtag_add_callback(f, in); } -void jtag_add_dr_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +void jtag_add_callback4(jtag_callback_t f, u8 *in, + jtag_callback_data_t data1, jtag_callback_data_t data2, + jtag_callback_data_t data3) { - int retval; - - jtag_prelude(state); - - retval=interface_jtag_add_dr_scan(in_num_fields, in_fields, cmd_queue_end_state); - if (retval!=ERROR_OK) - jtag_error=retval; + interface_jtag_add_callback4(f, in, data1, data2, data3); } - int jtag_check_value_inner(u8 *captured, u8 *in_check_value, u8 *in_check_mask, int num_bits); static int jtag_check_value_mask_callback(u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3) @@ -724,31 +601,18 @@ static int jtag_check_value_mask_callback(u8 *in, jtag_callback_data_t data1, jt return jtag_check_value_inner(in, (u8 *)data1, (u8 *)data2, (int)data3); } -static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state), +static void jtag_add_scan_check(void (*jtag_add_scan)(int in_num_fields, const scan_field_t *in_fields, tap_state_t state), int in_num_fields, scan_field_t *in_fields, tap_state_t state) { for (int i = 0; i < in_num_fields; i++) { - in_fields[i].allocated = 0; - in_fields[i].modified = 0; - if ((in_fields[i].check_value != NULL) && (in_fields[i].in_value == NULL)) - { - in_fields[i].modified = 1; - /* we need storage space... */ -#ifdef HAVE_JTAG_MINIDRIVER_H - if (in_fields[i].num_bits <= 32) - { - /* This is enough space and we're executing this synchronously */ - in_fields[i].in_value = in_fields[i].intmp; - } else - { - in_fields[i].in_value = (u8 *)malloc(CEIL(in_fields[i].num_bits, 8)); - in_fields[i].allocated = 1; - } -#else - in_fields[i].in_value = (u8 *)cmd_queue_alloc(CEIL(in_fields[i].num_bits, 8)); -#endif - } + struct scan_field_s *field = &in_fields[i]; + field->allocated = 0; + field->modified = 0; + if (field->check_value || field->in_value) + continue; + interface_jtag_add_scan_check_alloc(field); + field->modified = 1; } jtag_add_scan(in_num_fields, in_fields, state); @@ -785,186 +649,36 @@ void jtag_add_dr_scan_check(int in_num_fields, scan_field_t *in_fields, tap_stat } } -int MINIDRIVER(interface_jtag_add_dr_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state) -{ - int j; - int nth_tap; - int bypass_devices = 0; - int field_count = 0; - - jtag_tap_t *tap; - - /* count devices in bypass */ - tap = NULL; - bypass_devices = 0; - for(;;){ - tap = jtag_NextEnabledTap(tap); - if( tap == NULL ){ - break; - } - if( tap->bypass ){ - bypass_devices++; - } - } - - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - scan_command_t * scan = cmd_queue_alloc(sizeof(scan_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_SCAN; - cmd->cmd.scan = scan; - - scan->ir_scan = false; - scan->num_fields = in_num_fields + bypass_devices; - scan->fields = cmd_queue_alloc((in_num_fields + bypass_devices) * sizeof(scan_field_t)); - scan->end_state = state; - - tap = NULL; - nth_tap = -1; - for(;;){ - nth_tap++; - tap = jtag_NextEnabledTap(tap); - if( tap == NULL ){ - break; - } - int found = 0; - scan->fields[field_count].tap = tap; - - for (j = 0; j < in_num_fields; j++) - { - if (tap == in_fields[j].tap) - { - found = 1; - size_t scan_size = in_fields[j].num_bits; - scan->fields[field_count].num_bits = scan_size; - scan->fields[field_count].out_value = buf_cpy(in_fields[j].out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size); - scan->fields[field_count].in_value = in_fields[j].in_value; - field_count++; - } - } - if (!found) - { -#ifdef _DEBUG_JTAG_IO_ - /* if a device isn't listed, the BYPASS register should be selected */ - if (! tap->bypass) - { - LOG_ERROR("BUG: no scan data for a device not in BYPASS"); - exit(-1); - } -#endif - /* program the scan field to 1 bit length, and ignore it's value */ - scan->fields[field_count].num_bits = 1; - scan->fields[field_count].out_value = NULL; - scan->fields[field_count].in_value = NULL; - field_count++; - } - else - { -#ifdef _DEBUG_JTAG_IO_ - /* if a device is listed, the BYPASS register must not be selected */ - if (tap->bypass) - { - LOG_ERROR("BUG: scan data for a device in BYPASS"); - exit(-1); - } -#endif - } - } - - /* field_count represents the true number of fields setup*/ - scan->num_fields = field_count; - return ERROR_OK; -} -void MINIDRIVER(interface_jtag_add_dr_out)(jtag_tap_t *target_tap, - int in_num_fields, - const int *num_bits, - const u32 *value, - tap_state_t end_state) +/** + * Generate a DR SCAN using the fields passed to the function + * + * For not bypassed TAPs the function checks in_fields and uses fields specified there. + * For bypassed TAPs the function generates a dummy 1bit field. + * + * The bypass status of TAPs is set by jtag_add_ir_scan(). + * + */ +void jtag_add_dr_scan(int in_num_fields, const scan_field_t *in_fields, tap_state_t state) { - int nth_tap; - int field_count = 0; - int bypass_devices = 0; - - jtag_tap_t *tap; - - /* count devices in bypass */ - tap = NULL; - bypass_devices = 0; - for(;;){ - tap = jtag_NextEnabledTap(tap); - if( tap == NULL ){ - break; - } - if( tap->bypass ){ - bypass_devices++; - } - } - - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - scan_command_t * scan = cmd_queue_alloc(sizeof(scan_command_t)); - - jtag_queue_command(cmd); + int retval; - cmd->type = JTAG_SCAN; - cmd->cmd.scan = scan; + jtag_prelude(state); - scan->ir_scan = false; - scan->num_fields = in_num_fields + bypass_devices; - scan->fields = cmd_queue_alloc((in_num_fields + bypass_devices) * sizeof(scan_field_t)); - scan->end_state = end_state; + retval=interface_jtag_add_dr_scan(in_num_fields, in_fields, cmd_queue_end_state); + if (retval!=ERROR_OK) + jtag_error=retval; +} - tap = NULL; - nth_tap = -1; - for(;;){ - tap = jtag_NextEnabledTap(tap); - if( tap == NULL ){ - break; - } - nth_tap++; - scan->fields[field_count].tap = tap; - if (tap == target_tap) - { -#ifdef _DEBUG_JTAG_IO_ - /* if a device is listed, the BYPASS register must not be selected */ - if (tap->bypass) - { - LOG_ERROR("BUG: scan data for a device in BYPASS"); - exit(-1); - } -#endif - for (int j = 0; j < in_num_fields; j++) - { - u8 out_value[4]; - size_t scan_size = num_bits[j]; - buf_set_u32(out_value, 0, scan_size, value[j]); - scan->fields[field_count].num_bits = scan_size; - scan->fields[field_count].out_value = buf_cpy(out_value, cmd_queue_alloc(CEIL(scan_size, 8)), scan_size); - scan->fields[field_count].in_value = NULL; - field_count++; - } - } else - { -#ifdef _DEBUG_JTAG_IO_ - /* if a device isn't listed, the BYPASS register should be selected */ - if (! tap->bypass) - { - LOG_ERROR("BUG: no scan data for a device not in BYPASS"); - exit(-1); - } -#endif - /* program the scan field to 1 bit length, and ignore it's value */ - scan->fields[field_count].num_bits = 1; - scan->fields[field_count].out_value = NULL; - scan->fields[field_count].in_value = NULL; - field_count++; - } - } -} -void jtag_add_plain_dr_scan(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +/** + * Duplicate the scan fields passed into the function into a DR SCAN command + * + * This function assumes that the caller handles extra fields for bypassed TAPs + * + */ +void jtag_add_plain_dr_scan(int in_num_fields, const scan_field_t *in_fields, tap_state_t state) { int retval; @@ -975,32 +689,18 @@ void jtag_add_plain_dr_scan(int in_num_fields, scan_field_t *in_fields, tap_stat jtag_error=retval; } -int MINIDRIVER(interface_jtag_add_plain_dr_scan)(int in_num_fields, scan_field_t *in_fields, tap_state_t state) +void jtag_add_dr_out(jtag_tap_t* tap, + int num_fields, const int* num_bits, const u32* value, + tap_state_t end_state) { - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - scan_command_t * scan = cmd_queue_alloc(sizeof(scan_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_SCAN; - cmd->cmd.scan = scan; + if (end_state != TAP_INVALID) + cmd_queue_end_state = end_state; - scan->ir_scan = false; - scan->num_fields = in_num_fields; - scan->fields = cmd_queue_alloc(in_num_fields * sizeof(scan_field_t)); - scan->end_state = state; - - for (int i = 0; i < in_num_fields; i++) - { - int num_bits = in_fields[i].num_bits; - int num_bytes = CEIL(in_fields[i].num_bits, 8); - scan->fields[i].tap = in_fields[i].tap; - scan->fields[i].num_bits = num_bits; - scan->fields[i].out_value = buf_cpy(in_fields[i].out_value, cmd_queue_alloc(num_bytes), num_bits); - scan->fields[i].in_value = in_fields[i].in_value; - } + cmd_queue_cur_state = cmd_queue_end_state; - return ERROR_OK; + interface_jtag_add_dr_out(tap, + num_fields, num_bits, value, + cmd_queue_end_state); } void jtag_add_tlr(void) @@ -1013,24 +713,7 @@ void jtag_add_tlr(void) jtag_error=retval; } -int MINIDRIVER(interface_jtag_add_tlr)(void) -{ - tap_state_t state = TAP_RESET; - - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_STATEMOVE; - - cmd->cmd.statemove = cmd_queue_alloc(sizeof(statemove_command_t)); - cmd->cmd.statemove->end_state = state; - - return ERROR_OK; -} - -void jtag_add_pathmove(int num_states, tap_state_t *path) +void jtag_add_pathmove(int num_states, const tap_state_t *path) { tap_state_t cur_state = cmd_queue_cur_state; int i; @@ -1068,41 +751,6 @@ void jtag_add_pathmove(int num_states, tap_state_t *path) jtag_error=retval; } -int MINIDRIVER(interface_jtag_add_pathmove)(int num_states, tap_state_t *path) -{ - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_PATHMOVE; - - cmd->cmd.pathmove = cmd_queue_alloc(sizeof(pathmove_command_t)); - cmd->cmd.pathmove->num_states = num_states; - cmd->cmd.pathmove->path = cmd_queue_alloc(sizeof(tap_state_t) * num_states); - - for (int i = 0; i < num_states; i++) - cmd->cmd.pathmove->path[i] = path[i]; - - return ERROR_OK; -} - -int MINIDRIVER(interface_jtag_add_runtest)(int num_cycles, tap_state_t state) -{ - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_RUNTEST; - - cmd->cmd.runtest = cmd_queue_alloc(sizeof(runtest_command_t)); - cmd->cmd.runtest->num_cycles = num_cycles; - cmd->cmd.runtest->end_state = state; - - return ERROR_OK; -} - void jtag_add_runtest(int num_cycles, tap_state_t state) { int retval; @@ -1116,21 +764,6 @@ void jtag_add_runtest(int num_cycles, tap_state_t state) } -int MINIDRIVER(interface_jtag_add_clocks)( int num_cycles ) -{ - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_STABLECLOCKS; - - cmd->cmd.stableclocks = cmd_queue_alloc(sizeof(stableclocks_command_t)); - cmd->cmd.stableclocks->num_cycles = num_cycles; - - return ERROR_OK; -} - void jtag_add_clocks( int num_cycles ) { int retval; @@ -1219,6 +852,7 @@ void jtag_add_reset(int req_tlr_or_trst, int req_srst) jtag_error=retval; return; } + jtag_execute_queue(); if (jtag_srst) { @@ -1246,7 +880,7 @@ void jtag_add_reset(int req_tlr_or_trst, int req_srst) * and inform possible listeners about this */ LOG_DEBUG("TRST line asserted"); - cmd_queue_cur_state = TAP_RESET; + tap_set_state(TAP_RESET); jtag_call_event_callbacks(JTAG_TRST_ASSERTED); } else @@ -1256,22 +890,6 @@ void jtag_add_reset(int req_tlr_or_trst, int req_srst) } } -int MINIDRIVER(interface_jtag_add_reset)(int req_trst, int req_srst) -{ - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_RESET; - - cmd->cmd.reset = cmd_queue_alloc(sizeof(reset_command_t)); - cmd->cmd.reset->trst = req_trst; - cmd->cmd.reset->srst = req_srst; - - return ERROR_OK; -} - void jtag_add_end_state(tap_state_t state) { cmd_queue_end_state = state; @@ -1281,21 +899,6 @@ void jtag_add_end_state(tap_state_t state) } } -int MINIDRIVER(interface_jtag_add_sleep)(u32 us) -{ - /* allocate memory for a new list member */ - jtag_command_t * cmd = cmd_queue_alloc(sizeof(jtag_command_t)); - - jtag_queue_command(cmd); - - cmd->type = JTAG_SLEEP; - - cmd->cmd.sleep = cmd_queue_alloc(sizeof(sleep_command_t)); - cmd->cmd.sleep->us = us; - - return ERROR_OK; -} - void jtag_add_sleep(u32 us) { keep_alive(); /* we might be running on a very slow JTAG clk */ @@ -1305,7 +908,7 @@ void jtag_add_sleep(u32 us) return; } -int jtag_scan_size(scan_command_t *cmd) +int jtag_scan_size(const scan_command_t *cmd) { int bit_count = 0; int i; @@ -1319,7 +922,7 @@ int jtag_scan_size(scan_command_t *cmd) return bit_count; } -int jtag_build_buffer(scan_command_t *cmd, u8 **buffer) +int jtag_build_buffer(const scan_command_t *cmd, u8 **buffer) { int bit_count = 0; int i; @@ -1363,7 +966,7 @@ int jtag_build_buffer(scan_command_t *cmd, u8 **buffer) return bit_count; } -int jtag_read_buffer(u8 *buffer, scan_command_t *cmd) +int jtag_read_buffer(u8 *buffer, const scan_command_t *cmd) { int i; int bit_count = 0; @@ -1401,7 +1004,7 @@ int jtag_read_buffer(u8 *buffer, scan_command_t *cmd) return retval; } -static const char *jtag_tap_name(jtag_tap_t *tap) +static const char *jtag_tap_name(const jtag_tap_t *tap) { return (tap == NULL) ? "(unknown)" : tap->dotted_name; } @@ -1462,107 +1065,45 @@ void jtag_check_value_mask(scan_field_t *field, u8 *value, u8 *mask) if (value==NULL) { /* no checking to do */ - return; - } - - jtag_execute_queue_noclear(); - - int retval=jtag_check_value_inner(field->in_value, value, mask, field->num_bits); - jtag_set_error(retval); -} - - - -enum scan_type jtag_scan_type(scan_command_t *cmd) -{ - int i; - int type = 0; - - for (i = 0; i < cmd->num_fields; i++) - { - if (cmd->fields[i].in_value) - type |= SCAN_IN; - if (cmd->fields[i].out_value) - type |= SCAN_OUT; - } - - return type; -} - - -#ifndef HAVE_JTAG_MINIDRIVER_H -/* add callback to end of queue */ -void jtag_add_callback4(jtag_callback_t callback, u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3) -{ - struct jtag_callback_entry *entry=cmd_queue_alloc(sizeof(struct jtag_callback_entry)); - - entry->next=NULL; - entry->callback=callback; - entry->in=in; - entry->data1=data1; - entry->data2=data2; - entry->data3=data3; - - if (jtag_callback_queue_head==NULL) - { - jtag_callback_queue_head=entry; - jtag_callback_queue_tail=entry; - } else - { - jtag_callback_queue_tail->next=entry; - jtag_callback_queue_tail=entry; + return; } -} + jtag_execute_queue_noclear(); -static int jtag_convert_to_callback4(u8 *in, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3) -{ - ((jtag_callback1_t)data1)(in); - return ERROR_OK; + int retval=jtag_check_value_inner(field->in_value, value, mask, field->num_bits); + jtag_set_error(retval); } -void jtag_add_callback(jtag_callback1_t callback, u8 *in) -{ - jtag_add_callback4(jtag_convert_to_callback4, in, (jtag_callback_data_t)callback, 0, 0); -} -#endif -#ifndef HAVE_JTAG_MINIDRIVER_H -int interface_jtag_execute_queue(void) +enum scan_type jtag_scan_type(const scan_command_t *cmd) { - int retval; + int i; + int type = 0; - if (jtag==NULL) + for (i = 0; i < cmd->num_fields; i++) { - LOG_ERROR("No JTAG interface configured yet. Issue 'init' command in startup scripts before communicating with targets."); - return ERROR_FAIL; + if (cmd->fields[i].in_value) + type |= SCAN_IN; + if (cmd->fields[i].out_value) + type |= SCAN_OUT; } - retval = jtag->execute_queue(); + return type; +} - if (retval == ERROR_OK) +int default_interface_jtag_execute_queue(void) +{ + if (NULL == jtag) { - struct jtag_callback_entry *entry; - for (entry=jtag_callback_queue_head; entry!=NULL; entry=entry->next) - { - retval=entry->callback(entry->in, entry->data1, entry->data2, entry->data3); - if (retval!=ERROR_OK) - break; - } + LOG_ERROR("No JTAG interface configured yet. " + "Issue 'init' command in startup scripts " + "before communicating with targets."); + return ERROR_FAIL; } - cmd_queue_free(); - - jtag_callback_queue_head = NULL; - jtag_callback_queue_tail = NULL; - - jtag_command_queue = NULL; - last_command_pointer = &jtag_command_queue; - - return retval; + return jtag->execute_queue(); } -#endif void jtag_execute_queue_noclear(void) { @@ -2280,11 +1821,12 @@ int jtag_register_commands(struct command_context_s *cmd_ctx) register_command(cmd_ctx, NULL, "interface", handle_interface_command, COMMAND_CONFIG, "try to configure interface"); register_command(cmd_ctx, NULL, "jtag_speed", handle_jtag_speed_command, - COMMAND_ANY, "set jtag speed (if supported)"); + COMMAND_ANY, "(DEPRECATED) set jtag speed (if supported)"); register_command(cmd_ctx, NULL, "jtag_khz", handle_jtag_khz_command, - COMMAND_ANY, "same as jtag_speed, except it takes maximum khz as arguments. 0 KHz = RTCK."); + COMMAND_ANY, "set maximum jtag speed (if supported); " + "parameter is maximum khz, or 0 for adaptive clocking (RTCK)."); register_command(cmd_ctx, NULL, "jtag_device", handle_jtag_device_command, - COMMAND_CONFIG, "jtag_device "); + COMMAND_CONFIG, "(DEPRECATED) jtag_device "); register_command(cmd_ctx, NULL, "reset_config", handle_reset_config_command, COMMAND_ANY, "[none/trst_only/srst_only/trst_and_srst] [srst_pulls_trst/trst_pulls_srst] [combined/separate] [trst_push_pull/trst_open_drain] [srst_push_pull/srst_open_drain]"); @@ -2371,6 +1913,20 @@ static int jtag_init_inner(struct command_context_s *cmd_ctx) return ERROR_OK; } +int jtag_interface_quit(void) +{ + if (!jtag || !jtag->quit) + return ERROR_OK; + + // close the JTAG interface + int result = jtag->quit(); + if (ERROR_OK != result) + LOG_ERROR("failed: %d", result); + + return ERROR_OK; +} + + int jtag_init_reset(struct command_context_s *cmd_ctx) { int retval; @@ -2615,77 +2171,111 @@ static int handle_scan_chain_command(struct command_context_s *cmd_ctx, char *cm static int handle_reset_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) { + int new_cfg = 0; + int mask = 0; + if (argc < 1) return ERROR_COMMAND_SYNTAX_ERROR; - if (argc >= 1) - { - if (strcmp(args[0], "none") == 0) - jtag_reset_config = RESET_NONE; - else if (strcmp(args[0], "trst_only") == 0) - jtag_reset_config = RESET_HAS_TRST; - else if (strcmp(args[0], "srst_only") == 0) - jtag_reset_config = RESET_HAS_SRST; - else if (strcmp(args[0], "trst_and_srst") == 0) - jtag_reset_config = RESET_TRST_AND_SRST; + /* Original versions cared about the order of these tokens: + * reset_config signals [combination [trst_type [srst_type]]] + * They also clobbered the previous configuration even on error. + * + * Here we don't care about the order, and only change values + * which have been explicitly specified. + */ + for (; argc; argc--, args++) { + int tmp = 0; + int m; + + /* signals */ + m = RESET_HAS_TRST | RESET_HAS_SRST; + if (strcmp(*args, "none") == 0) + tmp = RESET_NONE; + else if (strcmp(*args, "trst_only") == 0) + tmp = RESET_HAS_TRST; + else if (strcmp(*args, "srst_only") == 0) + tmp = RESET_HAS_SRST; + else if (strcmp(*args, "trst_and_srst") == 0) + tmp = RESET_HAS_TRST | RESET_HAS_SRST; else - { - LOG_ERROR("(1) invalid reset_config argument (%s), defaulting to none", args[0]); - jtag_reset_config = RESET_NONE; + m = 0; + if (mask & m) { + LOG_ERROR("extra reset_config %s spec (%s)", + "signal", *args); return ERROR_INVALID_ARGUMENTS; } - } - - if (argc >= 2) - { - if (strcmp(args[1], "separate") == 0) - { - /* seperate reset lines - default */ - } else - { - if (strcmp(args[1], "srst_pulls_trst") == 0) - jtag_reset_config |= RESET_SRST_PULLS_TRST; - else if (strcmp(args[1], "trst_pulls_srst") == 0) - jtag_reset_config |= RESET_TRST_PULLS_SRST; - else if (strcmp(args[1], "combined") == 0) - jtag_reset_config |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST; - else - { - LOG_ERROR("(2) invalid reset_config argument (%s), defaulting to none", args[1]); - jtag_reset_config = RESET_NONE; - return ERROR_INVALID_ARGUMENTS; - } + if (m) + goto next; + + /* combination (options for broken wiring) */ + m = RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST; + if (strcmp(*args, "separate") == 0) + /* separate reset lines - default */; + else if (strcmp(*args, "srst_pulls_trst") == 0) + tmp |= RESET_SRST_PULLS_TRST; + else if (strcmp(*args, "trst_pulls_srst") == 0) + tmp |= RESET_TRST_PULLS_SRST; + else if (strcmp(*args, "combined") == 0) + tmp |= RESET_SRST_PULLS_TRST | RESET_TRST_PULLS_SRST; + else + m = 0; + if (mask & m) { + LOG_ERROR("extra reset_config %s spec (%s)", + "combination", *args); + return ERROR_INVALID_ARGUMENTS; } - } + if (m) + goto next; - if (argc >= 3) - { - if (strcmp(args[2], "trst_open_drain") == 0) - jtag_reset_config |= RESET_TRST_OPEN_DRAIN; - else if (strcmp(args[2], "trst_push_pull") == 0) - jtag_reset_config &= ~RESET_TRST_OPEN_DRAIN; + /* trst_type (NOP without HAS_TRST) */ + m = RESET_TRST_OPEN_DRAIN; + if (strcmp(*args, "trst_open_drain") == 0) + tmp |= RESET_TRST_OPEN_DRAIN; + else if (strcmp(*args, "trst_push_pull") == 0) + /* push/pull from adapter - default */; else - { - LOG_ERROR("(3) invalid reset_config argument (%s) defaulting to none", args[2] ); - jtag_reset_config = RESET_NONE; + m = 0; + if (mask & m) { + LOG_ERROR("extra reset_config %s spec (%s)", + "trst_type", *args); return ERROR_INVALID_ARGUMENTS; } - } + if (m) + goto next; - if (argc >= 4) - { - if (strcmp(args[3], "srst_push_pull") == 0) - jtag_reset_config |= RESET_SRST_PUSH_PULL; - else if (strcmp(args[3], "srst_open_drain") == 0) - jtag_reset_config &= ~RESET_SRST_PUSH_PULL; + /* srst_type (NOP without HAS_SRST) */ + m |= RESET_SRST_PUSH_PULL; + if (strcmp(*args, "srst_push_pull") == 0) + tmp |= RESET_SRST_PUSH_PULL; + else if (strcmp(*args, "srst_open_drain") == 0) + /* open drain from adapter - default */; else - { - LOG_ERROR("(4) invalid reset_config argument (%s), defaulting to none", args[3]); - jtag_reset_config = RESET_NONE; + m = 0; + if (mask & m) { + LOG_ERROR("extra reset_config %s spec (%s)", + "srst_type", *args); return ERROR_INVALID_ARGUMENTS; } + if (m) + goto next; + + /* caller provided nonsense; fail */ + LOG_ERROR("unknown reset_config flag (%s)", *args); + return ERROR_INVALID_ARGUMENTS; + +next: + /* Remember the bits which were specified (mask) + * and their new values (new_cfg). + */ + mask |= m; + new_cfg |= tmp; } + /* clear previous values of those bits, save new values */ + jtag_reset_config &= ~mask; + jtag_reset_config |= new_cfg; + return ERROR_OK; } @@ -2871,6 +2461,26 @@ static int handle_runtest_command(struct command_context_s *cmd_ctx, char *cmd, } +/* + * For "irscan" or "drscan" commands, the "end" (really, "next") state + * should be stable ... and *NOT* a shift state, otherwise free-running + * jtag clocks could change the values latched by the update state. + */ +static bool scan_is_safe(tap_state_t state) +{ + switch (state) + { + case TAP_RESET: + case TAP_IDLE: + case TAP_DRPAUSE: + case TAP_IRPAUSE: + return true; + default: + return false; + } +} + + static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) { int i; @@ -2883,11 +2493,12 @@ static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, c return ERROR_COMMAND_SYNTAX_ERROR; } - /* optional "-endstate" */ - /* "statename" */ - /* at the end of the arguments. */ - /* assume none. */ - endstate = cmd_queue_end_state; + /* optional "-endstate" "statename" at the end of the arguments, + * so that e.g. IRPAUSE can let us load the data register before + * entering RUN/IDLE to execute the instruction we load here. + */ + endstate = TAP_IDLE; + if( argc >= 4 ){ /* have at least one pair of numbers. */ /* is last pair the magic text? */ @@ -2904,6 +2515,9 @@ static int handle_irscan_command(struct command_context_s *cmd_ctx, char *cmd, c if( endstate >= TAP_NUM_STATES ){ return ERROR_COMMAND_SYNTAX_ERROR; } else { + if (!scan_is_safe(endstate)) + LOG_WARNING("irscan with unsafe " + "endstate \"%s\"", cpA); /* found - remove the last 2 args */ argc -= 2; } @@ -2968,8 +2582,8 @@ static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args return JIM_ERR; } - /* assume no endstate */ - endstate = cmd_queue_end_state; + endstate = TAP_IDLE; + /* validate arguments as numbers */ e = JIM_OK; for (i = 2; i < argc; i+=2) @@ -2989,7 +2603,10 @@ static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args return e; } - /* it could be: "-endstate FOO" */ + /* it could be: "-endstate FOO" + * e.g. DRPAUSE so we can issue more instructions + * before entering RUN/IDLE and executing them. + */ /* get arg as a string. */ cp = Jim_GetString( args[i], NULL ); @@ -3004,6 +2621,10 @@ static int Jim_Command_drscan(Jim_Interp *interp, int argc, Jim_Obj *const *args /* update the error message */ Jim_SetResult_sprintf(interp,"endstate: %s invalid", cp ); } else { + if (!scan_is_safe(endstate)) + LOG_WARNING("drscan with unsafe " + "endstate \"%s\"", cp); + /* valid - so clear the error */ e = JIM_OK; /* and remove the last 2 args */ @@ -3174,464 +2795,112 @@ void jtag_tap_handle_event( jtag_tap_t * tap, enum jtag_tap_event e) } } -/*--------------------------------------------*/ - -/* these Cable Helper API functions are all documented in the jtag.h header file, - using a Doxygen format. And since Doxygen's configuration file "Doxyfile", - is setup to prefer its docs in the header file, no documentation is here, for - if it were, it would have to be doubly maintained. -*/ - -/** - * @see tap_set_state() and tap_get_state() accessors. - * Actual name is not important since accessors hide it. - */ -static tap_state_t state_follower = TAP_RESET; - -void tap_set_state_impl( tap_state_t new_state ) -{ - /* this is the state we think the TAPs are in now, was cur_state */ - state_follower = new_state; -} - -tap_state_t tap_get_state() -{ - return state_follower; -} - -/** - * @see tap_set_end_state() and tap_get_end_state() accessors. - * Actual name is not important because accessors hide it. - */ -static tap_state_t end_state_follower = TAP_RESET; - -void tap_set_end_state( tap_state_t new_end_state ) -{ - /* this is the state we think the TAPs will be in at completion of the - current TAP operation, was end_state - */ - end_state_follower = new_end_state; -} - -tap_state_t tap_get_end_state() -{ - return end_state_follower; -} - - -int tap_move_ndx( tap_state_t astate ) +static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) { - /* given a stable state, return the index into the tms_seqs[] array within tap_get_tms_path() */ - - int ndx; + if (argc > 1) + return ERROR_COMMAND_SYNTAX_ERROR; - switch( astate ) + if (argc == 1) { - case TAP_RESET: ndx = 0; break; - case TAP_DRSHIFT: ndx = 2; break; - case TAP_DRPAUSE: ndx = 3; break; - case TAP_IDLE: ndx = 1; break; - case TAP_IRSHIFT: ndx = 4; break; - case TAP_IRPAUSE: ndx = 5; break; - default: - LOG_ERROR( "fatal: unstable state \"%s\" used in tap_move_ndx()", tap_state_name(astate) ); - exit(1); - } - - return ndx; -} + bool use_new_table; + if (strcmp(args[0], "short") == 0) + use_new_table = true; + else if (strcmp(args[0], "long") == 0) + use_new_table = false; + else + return ERROR_COMMAND_SYNTAX_ERROR; + tap_use_new_tms_table(use_new_table); + } -/* tap_move[i][j]: tap movement command to go from state i to state j - * 0: Test-Logic-Reset - * 1: Run-Test/Idle - * 2: Shift-DR - * 3: Pause-DR - * 4: Shift-IR - * 5: Pause-IR - * - * DRSHIFT->DRSHIFT and IRSHIFT->IRSHIFT have to be caught in interface specific code - */ -struct tms_sequences -{ - u8 bits; - u8 bit_count; + command_print(cmd_ctx, "tms sequence is %s", + tap_uses_new_tms_table() ? "short": "long"); -}; + return ERROR_OK; +} -/* - * These macros allow us to specify TMS state transitions by bits rather than hex bytes. - * Read the bits from LSBit first to MSBit last (right-to-left). +/** + * Function jtag_add_statemove + * moves from the current state to the goal \a state. This needs + * to be handled according to the xsvf spec, see the XSTATE command + * description. */ -#define HEX__(n) 0x##n##LU - -#define B8__(x) \ - (((x) & 0x0000000FLU)?(1<<0):0) \ - +(((x) & 0x000000F0LU)?(1<<1):0) \ - +(((x) & 0x00000F00LU)?(1<<2):0) \ - +(((x) & 0x0000F000LU)?(1<<3):0) \ - +(((x) & 0x000F0000LU)?(1<<4):0) \ - +(((x) & 0x00F00000LU)?(1<<5):0) \ - +(((x) & 0x0F000000LU)?(1<<6):0) \ - +(((x) & 0xF0000000LU)?(1<<7):0) - -#define B8(bits,count) { ((u8)B8__(HEX__(bits))), (count) } - -static const struct tms_sequences old_tms_seqs[6][6] = /* [from_state_ndx][to_state_ndx] */ -{ - /* value clocked to TMS to move from one of six stable states to another. - * N.B. OOCD clocks TMS from LSB first, so read these right-to-left. - * N.B. These values are tightly bound to the table in tap_get_tms_path_len(). - * N.B. Reset only needs to be 0b11111, but in JLink an even byte of 1's is more stable. - * These extra ones cause no TAP state problem, because we go into reset and stay in reset. - */ - - - - /* to state: */ - /* RESET IDLE DRSHIFT DRPAUSE IRSHIFT IRPAUSE */ /* from state: */ - { B8(1111111,7), B8(0000000,7), B8(0010111,7), B8(0001010,7), B8(0011011,7), B8(0010110,7) }, /* RESET */ - { B8(1111111,7), B8(0000000,7), B8(0100101,7), B8(0000101,7), B8(0101011,7), B8(0001011,7) }, /* IDLE */ - { B8(1111111,7), B8(0110001,7), B8(0000000,7), B8(0000001,7), B8(0001111,7), B8(0101111,7) }, /* DRSHIFT */ - { B8(1111111,7), B8(0110000,7), B8(0100000,7), B8(0010111,7), B8(0011110,7), B8(0101111,7) }, /* DRPAUSE */ - { B8(1111111,7), B8(0110001,7), B8(0000111,7), B8(0010111,7), B8(0000000,7), B8(0000001,7) }, /* IRSHIFT */ - { B8(1111111,7), B8(0110000,7), B8(0011100,7), B8(0010111,7), B8(0011110,7), B8(0101111,7) }, /* IRPAUSE */ -}; - - - -static const struct tms_sequences short_tms_seqs[6][6] = /* [from_state_ndx][to_state_ndx] */ -{ - /* this is the table submitted by Jeff Williams on 3/30/2009 with this comment: - - OK, I added Peter's version of the state table, and it works OK for - me on MC1322x. I've recreated the jlink portion of patch with this - new state table. His changes to my state table are pretty minor in - terms of total transitions, but Peter feels that his version fixes - some long-standing problems. - Jeff - - I added the bit count into the table, reduced RESET column to 7 bits from 8. - Dick - - state specific comments: - ------------------------ - *->RESET tried the 5 bit reset and it gave me problems, 7 bits seems to - work better on ARM9 with ft2232 driver. (Dick) - - RESET->DRSHIFT add 1 extra clock cycles in the RESET state before advancing. - needed on ARM9 with ft2232 driver. (Dick) - - RESET->IRSHIFT add 1 extra clock cycles in the RESET state before advancing. - needed on ARM9 with ft2232 driver. (Dick) - */ - - /* to state: */ - /* RESET IDLE DRSHIFT DRPAUSE IRSHIFT IRPAUSE */ /* from state: */ - { B8(1111111,7), B8(0000000,7), B8(0010111,7), B8(0001010,7), B8(0011011,7), B8(0010110,7) }, /* RESET */ - { B8(1111111,7), B8(0000000,7), B8(001,3), B8(0101,4), B8(0011,4), B8(01011,5) }, /* IDLE */ - { B8(1111111,7), B8(011,3), B8(00111,5), B8(01,2), B8(001111,6), B8(0101111,7) }, /* DRSHIFT */ - { B8(1111111,7), B8(011,3), B8(01,2), B8(0,1), B8(001111,6), B8(0101111,7) }, /* DRPAUSE */ - { B8(1111111,7), B8(011,3), B8(00111,5), B8(010111,6), B8(001111,6), B8(01,2) }, /* IRSHIFT */ - { B8(1111111,7), B8(011,3), B8(00111,5), B8(010111,6), B8(01,2), B8(0,1) } /* IRPAUSE */ - -}; - -typedef const struct tms_sequences tms_table[6][6]; - -static tms_table *tms_seqs=&short_tms_seqs; - -int tap_get_tms_path( tap_state_t from, tap_state_t to ) +int jtag_add_statemove(tap_state_t goal_state) { - return (*tms_seqs)[tap_move_ndx(from)][tap_move_ndx(to)].bits; -} + int retval = ERROR_OK; + tap_state_t moves[8]; + tap_state_t cur_state = cmd_queue_cur_state; + int i; + int tms_bits; + int tms_count; -int tap_get_tms_path_len( tap_state_t from, tap_state_t to ) -{ - return (*tms_seqs)[tap_move_ndx(from)][tap_move_ndx(to)].bit_count; -} + LOG_DEBUG( "cur_state=%s goal_state=%s", + tap_state_name(cur_state), + tap_state_name(goal_state) ); -bool tap_is_state_stable(tap_state_t astate) -{ - bool is_stable; + /* From the XSVF spec, pertaining to XSTATE: - /* A switch() is used because it is symbol dependent - (not value dependent like an array), and can also check bounds. + 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. */ - switch( astate ) - { - case TAP_RESET: - case TAP_IDLE: - case TAP_DRSHIFT: - case TAP_DRPAUSE: - case TAP_IRSHIFT: - case TAP_IRPAUSE: - is_stable = true; - break; - default: - is_stable = false; - } - - return is_stable; -} -tap_state_t tap_state_transition(tap_state_t cur_state, bool tms) -{ - tap_state_t new_state; - - /* A switch is used because it is symbol dependent and not value dependent - like an array. Also it can check for out of range conditions. - */ + if (goal_state==cur_state ) + ; /* nothing to do */ - if (tms) - { - switch (cur_state) - { - case TAP_RESET: - new_state = cur_state; - break; - case TAP_IDLE: - case TAP_DRUPDATE: - case TAP_IRUPDATE: - new_state = TAP_DRSELECT; - break; - case TAP_DRSELECT: - new_state = TAP_IRSELECT; - break; - case TAP_DRCAPTURE: - case TAP_DRSHIFT: - new_state = TAP_DREXIT1; - break; - case TAP_DREXIT1: - case TAP_DREXIT2: - new_state = TAP_DRUPDATE; - break; - case TAP_DRPAUSE: - new_state = TAP_DREXIT2; - break; - case TAP_IRSELECT: - new_state = TAP_RESET; - break; - case TAP_IRCAPTURE: - case TAP_IRSHIFT: - new_state = TAP_IREXIT1; - break; - case TAP_IREXIT1: - case TAP_IREXIT2: - new_state = TAP_IRUPDATE; - break; - case TAP_IRPAUSE: - new_state = TAP_IREXIT2; - break; - default: - LOG_ERROR( "fatal: invalid argument cur_state=%d", cur_state ); - exit(1); - break; - } - } - else + else if( goal_state==TAP_RESET ) { - switch (cur_state) - { - case TAP_RESET: - case TAP_IDLE: - case TAP_DRUPDATE: - case TAP_IRUPDATE: - new_state = TAP_IDLE; - break; - case TAP_DRSELECT: - new_state = TAP_DRCAPTURE; - break; - case TAP_DRCAPTURE: - case TAP_DRSHIFT: - case TAP_DREXIT2: - new_state = TAP_DRSHIFT; - break; - case TAP_DREXIT1: - case TAP_DRPAUSE: - new_state = TAP_DRPAUSE; - break; - case TAP_IRSELECT: - new_state = TAP_IRCAPTURE; - break; - case TAP_IRCAPTURE: - case TAP_IRSHIFT: - case TAP_IREXIT2: - new_state = TAP_IRSHIFT; - break; - case TAP_IREXIT1: - case TAP_IRPAUSE: - new_state = TAP_IRPAUSE; - break; - default: - LOG_ERROR( "fatal: invalid argument cur_state=%d", cur_state ); - exit(1); - break; - } + jtag_add_tlr(); } - return new_state; -} - -const char* tap_state_name(tap_state_t state) -{ - const char* ret; - - switch( state ) + else if( tap_is_state_stable(cur_state) && tap_is_state_stable(goal_state) ) { - case TAP_RESET: ret = "RESET"; break; - case TAP_IDLE: ret = "RUN/IDLE"; break; - case TAP_DRSELECT: ret = "DRSELECT"; break; - case TAP_DRCAPTURE: ret = "DRCAPTURE"; break; - case TAP_DRSHIFT: ret = "DRSHIFT"; break; - case TAP_DREXIT1: ret = "DREXIT1"; break; - case TAP_DRPAUSE: ret = "DRPAUSE"; break; - case TAP_DREXIT2: ret = "DREXIT2"; break; - case TAP_DRUPDATE: ret = "DRUPDATE"; break; - case TAP_IRSELECT: ret = "IRSELECT"; break; - case TAP_IRCAPTURE: ret = "IRCAPTURE"; break; - case TAP_IRSHIFT: ret = "IRSHIFT"; break; - case TAP_IREXIT1: ret = "IREXIT1"; break; - case TAP_IRPAUSE: ret = "IRPAUSE"; break; - case TAP_IREXIT2: ret = "IREXIT2"; break; - case TAP_IRUPDATE: ret = "IRUPDATE"; break; - default: ret = "???"; - } - - return ret; -} - -static tap_state_t tap_state_by_name( const char *name ) -{ - tap_state_t x; - - for( x = 0 ; x < TAP_NUM_STATES ; x++ ){ - /* be nice to the human */ - if( 0 == strcasecmp( name, tap_state_name(x) ) ){ - return x; - } - } - /* not found */ - return TAP_INVALID; -} - -#ifdef _DEBUG_JTAG_IO_ - -#define JTAG_DEBUG_STATE_APPEND(buf, len, bit) \ - do { buf[len] = bit ? '1' : '0'; } while(0) -#define JTAG_DEBUG_STATE_PRINT(a, b, astr, bstr) \ - DEBUG_JTAG_IO("TAP/SM: %9s -> %5s\tTMS: %s\tTDI: %s", \ - tap_state_name(a), tap_state_name(b), astr, bstr) - -tap_state_t jtag_debug_state_machine(const void *tms_buf, const void *tdi_buf, - unsigned tap_bits, tap_state_t next_state) -{ - const u8 *tms_buffer; - const u8 *tdi_buffer; - unsigned tap_bytes; - unsigned cur_byte; - unsigned cur_bit; + /* note: unless tms_bits holds a path that agrees with [Ref 5] in above + spec, then this code is not fully conformant to the xsvf spec. This + puts a burden on tap_get_tms_path() function from the xsvf spec. + If in doubt, you should confirm that that burden is being met. + */ - unsigned tap_out_bits; - char tms_str[33]; - char tdi_str[33]; + tms_bits = tap_get_tms_path(cur_state, goal_state); + tms_count = tap_get_tms_path_len(cur_state, goal_state); - tap_state_t last_state; + assert( (unsigned) tms_count < DIM(moves) ); - // set startstate (and possibly last, if tap_bits == 0) - last_state = next_state; - DEBUG_JTAG_IO("TAP/SM: START state: %s", tap_state_name(next_state)); - - tms_buffer = (const u8 *)tms_buf; - tdi_buffer = (const u8 *)tdi_buf; - - tap_bytes = TAP_SCAN_BYTES(tap_bits); - DEBUG_JTAG_IO("TAP/SM: TMS bits: %u (bytes: %u)", tap_bits, tap_bytes); - - tap_out_bits = 0; - for(cur_byte = 0; cur_byte < tap_bytes; cur_byte++) - { - for(cur_bit = 0; cur_bit < 8; cur_bit++) + for (i=0; i>=1) { - // make sure we do not run off the end of the buffers - unsigned tap_bit = cur_byte * 8 + cur_bit; - if (tap_bit == tap_bits) - break; - - // check and save TMS bit - tap_bit = !!(tms_buffer[cur_byte] & (1 << cur_bit)); - JTAG_DEBUG_STATE_APPEND(tms_str, tap_out_bits, tap_bit); - - // use TMS bit to find the next TAP state - next_state = tap_state_transition(last_state, tap_bit); - - // check and store TDI bit - tap_bit = !!(tdi_buffer[cur_byte] & (1 << cur_bit)); - JTAG_DEBUG_STATE_APPEND(tdi_str, tap_out_bits, tap_bit); + bool bit = tms_bits & 1; - // increment TAP bits - tap_out_bits++; - - // Only show TDO bits on state transitions, or - // after some number of bits in the same state. - if ((next_state == last_state) && (tap_out_bits < 32)) - continue; - - // terminate strings and display state transition - tms_str[tap_out_bits] = tdi_str[tap_out_bits] = 0; - JTAG_DEBUG_STATE_PRINT(last_state, next_state, tms_str, tdi_str); - - // reset state - last_state = next_state; - tap_out_bits = 0; + cur_state = tap_state_transition(cur_state, bit); + moves[i] = cur_state; } + + jtag_add_pathmove(tms_count, moves); } - if (tap_out_bits) + /* else state must be immediately reachable in one clock cycle, and does not + need to be a stable state. + */ + else if( tap_state_transition(cur_state, true) == goal_state + || tap_state_transition(cur_state, false) == goal_state ) { - // terminate strings and display state transition - tms_str[tap_out_bits] = tdi_str[tap_out_bits] = 0; - JTAG_DEBUG_STATE_PRINT(last_state, next_state, tms_str, tdi_str); + /* move a single state */ + moves[0] = goal_state; + jtag_add_pathmove( 1, moves ); } - DEBUG_JTAG_IO("TAP/SM: FINAL state: %s", tap_state_name(next_state)); - - return next_state; -} -#endif // _DEBUG_JTAG_IO_ - -#ifndef HAVE_JTAG_MINIDRIVER_H -void jtag_alloc_in_value32(scan_field_t *field) -{ - field->in_value=(u8 *)cmd_queue_alloc(4); -} -#endif - -static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) -{ - if (argc == 1) - { - if (strcmp(args[0], "short") == 0) - { - tms_seqs=&short_tms_seqs; - } - else if (strcmp(args[0], "long") == 0) - { - tms_seqs=&old_tms_seqs; - } else - { - return ERROR_COMMAND_SYNTAX_ERROR; - } - } else if (argc != 0) + else { - return ERROR_COMMAND_SYNTAX_ERROR; + retval = ERROR_FAIL; } - command_print(cmd_ctx, "tms sequence is %s", (tms_seqs==&short_tms_seqs) ? "short": "long"); - - return ERROR_OK; + return retval; } -/*-------------------------------------------*/