#include "config.h"
#endif
-#define INCLUDE_JTAG_INTERFACE_H
#include "jtag.h"
#include "minidriver.h"
+#include "interface.h"
#ifdef HAVE_STRINGS_H
#include <strings.h>
*/
int jtag_error=ERROR_OK;
-typedef struct cmd_queue_page_s
-{
- void *address;
- size_t used;
- struct cmd_queue_page_s *next;
-} cmd_queue_page_t;
-
-#define CMD_QUEUE_PAGE_SIZE (1024 * 1024)
-static cmd_queue_page_t *cmd_queue_pages = NULL;
-
char* jtag_event_strings[] =
{
"JTAG controller reset (RESET or TRST)"
int jtag_trst = 0;
int jtag_srst = 0;
-jtag_command_t *jtag_command_queue = NULL;
-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;
return ERROR_OK;
}
-void jtag_queue_command(jtag_command_t * cmd)
+static void jtag_checks(void)
{
- // 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;
-
- // 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;
- int offset;
- u8 *t;
-
- /*
- * WARNING:
- * We align/round the *SIZE* per below
- * so that all pointers returned by
- * this function are reasonably well
- * aligned.
- *
- * If we did not, then an "odd-length" request would cause the
- * *next* allocation to be at an *odd* address, and because
- * this function has the same type of api as malloc() - we
- * must also return pointers that have the same type of
- * alignment.
- *
- * What I do not/have is a reasonable portable means
- * to align by...
- *
- * The solution here, is based on these suggestions.
- * http://gcc.gnu.org/ml/gcc-help/2008-12/msg00041.html
- *
- */
- union worse_case_align {
- int i;
- long l;
- float f;
- void *v;
- };
-#define ALIGN_SIZE (sizeof(union worse_case_align))
-
- /* The alignment process. */
- size = (size + ALIGN_SIZE -1) & (~(ALIGN_SIZE-1));
- /* Done... */
-
- if (*p_page)
- {
- while ((*p_page)->next)
- p_page = &((*p_page)->next);
- if (CMD_QUEUE_PAGE_SIZE - (*p_page)->used < size)
- p_page = &((*p_page)->next);
- }
-
- if (!*p_page)
- {
- *p_page = malloc(sizeof(cmd_queue_page_t));
- (*p_page)->used = 0;
- (*p_page)->address = malloc(CMD_QUEUE_PAGE_SIZE);
- (*p_page)->next = NULL;
- }
-
- offset = (*p_page)->used;
- (*p_page)->used += size;
-
- t=(u8 *)((*p_page)->address);
- return t + offset;
-}
-
-void cmd_queue_free(void)
-{
- cmd_queue_page_t *page = cmd_queue_pages;
-
- while (page)
- {
- cmd_queue_page_t *last = page;
- free(page->address);
- page = page->next;
- free(last);
- }
-
- 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)
- {
- LOG_WARNING("JTAG command queued, while TRST is low (TAP in reset)");
- jtag_error=ERROR_JTAG_TRST_ASSERTED;
- return;
- }
-
- if (cmd_queue_end_state == TAP_RESET)
- jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
+ assert(jtag_trst == 0);
}
static void jtag_prelude(tap_state_t state)
{
- jtag_prelude1();
+ jtag_checks();
- if (state != TAP_INVALID)
- jtag_add_end_state(state);
+ assert(state!=TAP_INVALID);
- cmd_queue_cur_state = cmd_queue_end_state;
+ cmd_queue_cur_state = state;
}
void jtag_alloc_in_value32(scan_field_t *field)
int retval;
jtag_prelude(state);
- retval=interface_jtag_add_ir_scan(in_num_fields, in_fields, cmd_queue_end_state);
+ retval=interface_jtag_add_ir_scan(in_num_fields, in_fields, state);
if (retval!=ERROR_OK)
jtag_error=retval;
jtag_prelude(state);
- retval=interface_jtag_add_plain_ir_scan(in_num_fields, in_fields, cmd_queue_end_state);
+ retval=interface_jtag_add_plain_ir_scan(in_num_fields, in_fields, state);
if (retval!=ERROR_OK)
jtag_error=retval;
}
jtag_prelude(state);
- retval=interface_jtag_add_dr_scan(in_num_fields, in_fields, cmd_queue_end_state);
+ retval=interface_jtag_add_dr_scan(in_num_fields, in_fields, state);
if (retval!=ERROR_OK)
jtag_error=retval;
}
jtag_prelude(state);
- retval=interface_jtag_add_plain_dr_scan(in_num_fields, in_fields, cmd_queue_end_state);
+ retval=interface_jtag_add_plain_dr_scan(in_num_fields, in_fields, state);
if (retval!=ERROR_OK)
jtag_error=retval;
}
int num_fields, const int* num_bits, const u32* value,
tap_state_t end_state)
{
- if (end_state != TAP_INVALID)
- cmd_queue_end_state = end_state;
+ assert(end_state != TAP_INVALID);
- cmd_queue_cur_state = cmd_queue_end_state;
+ cmd_queue_cur_state = end_state;
interface_jtag_add_dr_out(tap,
num_fields, num_bits, value,
- cmd_queue_end_state);
+ end_state);
}
void jtag_add_tlr(void)
retval=interface_jtag_add_tlr();
if (retval!=ERROR_OK)
jtag_error=retval;
+
+ jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
}
void jtag_add_pathmove(int num_states, const tap_state_t *path)
cur_state = path[i];
}
- jtag_prelude1();
+ jtag_checks();
retval = interface_jtag_add_pathmove(num_states, path);
cmd_queue_cur_state = path[num_states - 1];
jtag_prelude(state);
/* executed by sw or hw fifo */
- retval=interface_jtag_add_runtest(num_cycles, cmd_queue_end_state);
+ retval=interface_jtag_add_runtest(num_cycles, state);
if (retval!=ERROR_OK)
jtag_error=retval;
}
if( num_cycles > 0 )
{
- jtag_prelude1();
+ jtag_checks();
retval = interface_jtag_add_clocks(num_cycles);
if (retval != ERROR_OK)
if (trst_with_tlr)
{
LOG_DEBUG("JTAG reset with RESET instead of TRST");
- jtag_add_end_state(TAP_RESET);
+ jtag_set_end_state(TAP_RESET);
jtag_add_tlr();
- jtag_call_event_callbacks(JTAG_TRST_ASSERTED);
return;
}
}
}
-void jtag_add_end_state(tap_state_t state)
+tap_state_t jtag_set_end_state(tap_state_t state)
{
- cmd_queue_end_state = state;
- if ((cmd_queue_end_state == TAP_DRSHIFT)||(cmd_queue_end_state == TAP_IRSHIFT))
+ if ((state == TAP_DRSHIFT)||(state == TAP_IRSHIFT))
{
LOG_ERROR("BUG: TAP_DRSHIFT/IRSHIFT can't be end state. Calling code should use a larger scan field");
}
+
+ if (state!=TAP_INVALID)
+ cmd_queue_end_state = state;
+ return cmd_queue_end_state;
+}
+
+tap_state_t jtag_get_end_state(void)
+{
+ return cmd_queue_end_state;
}
void jtag_add_sleep(u32 us)
return;
}
-int jtag_scan_size(const scan_command_t *cmd)
-{
- int bit_count = 0;
- int i;
-
- /* count bits in scan command */
- for (i = 0; i < cmd->num_fields; i++)
- {
- bit_count += cmd->fields[i].num_bits;
- }
-
- return bit_count;
-}
-
-int jtag_build_buffer(const scan_command_t *cmd, u8 **buffer)
-{
- int bit_count = 0;
- int i;
-
- bit_count = jtag_scan_size(cmd);
- *buffer = calloc(1,CEIL(bit_count, 8));
-
- bit_count = 0;
-
-#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("%s num_fields: %i", cmd->ir_scan ? "IRSCAN" : "DRSCAN", cmd->num_fields);
-#endif
-
- for (i = 0; i < cmd->num_fields; i++)
- {
- if (cmd->fields[i].out_value)
- {
-#ifdef _DEBUG_JTAG_IO_
- char* char_buf = buf_to_str(cmd->fields[i].out_value, (cmd->fields[i].num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : cmd->fields[i].num_bits, 16);
-#endif
- buf_set_buf(cmd->fields[i].out_value, 0, *buffer, bit_count, cmd->fields[i].num_bits);
-#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("fields[%i].out_value[%i]: 0x%s", i, cmd->fields[i].num_bits, char_buf);
- free(char_buf);
-#endif
- }
- else
- {
-#ifdef _DEBUG_JTAG_IO_
- LOG_DEBUG("fields[%i].out_value[%i]: NULL", i, cmd->fields[i].num_bits);
-#endif
- }
-
- bit_count += cmd->fields[i].num_bits;
- }
-
-#ifdef _DEBUG_JTAG_IO_
- //LOG_DEBUG("bit_count totalling: %i", bit_count );
-#endif
-
- return bit_count;
-}
-
-int jtag_read_buffer(u8 *buffer, const scan_command_t *cmd)
-{
- int i;
- int bit_count = 0;
- int retval;
-
- /* we return ERROR_OK, unless a check fails, or a handler reports a problem */
- retval = ERROR_OK;
-
- for (i = 0; i < cmd->num_fields; i++)
- {
- /* if neither in_value nor in_handler
- * are specified we don't have to examine this field
- */
- if (cmd->fields[i].in_value)
- {
- int num_bits = cmd->fields[i].num_bits;
- u8 *captured = buf_set_buf(buffer, bit_count, malloc(CEIL(num_bits, 8)), 0, num_bits);
-
-#ifdef _DEBUG_JTAG_IO_
- char *char_buf = buf_to_str(captured, (num_bits > DEBUG_JTAG_IOZ) ? DEBUG_JTAG_IOZ : num_bits, 16);
- LOG_DEBUG("fields[%i].in_value[%i]: 0x%s", i, num_bits, char_buf);
- free(char_buf);
-#endif
-
- if (cmd->fields[i].in_value)
- {
- buf_cpy(captured, cmd->fields[i].in_value, num_bits);
- }
-
- free(captured);
- }
- bit_count += cmd->fields[i].num_bits;
- }
-
- return retval;
-}
-
static const char *jtag_tap_name(const jtag_tap_t *tap)
{
return (tap == NULL) ? "(unknown)" : tap->dotted_name;
-enum scan_type jtag_scan_type(const 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;
-}
-
int default_interface_jtag_execute_queue(void)
{
if (NULL == jtag)
command_print( cmd_ctx, "Invalid state name: %s\n", args[0] );
return ERROR_COMMAND_SYNTAX_ERROR;
}
- jtag_add_end_state(state);
+ jtag_set_end_state(state);
jtag_execute_queue();
}
command_print(cmd_ctx, "current endstate: %s", tap_state_name(cmd_queue_end_state));
return ERROR_COMMAND_SYNTAX_ERROR;
}
- jtag_add_runtest(strtol(args[0], NULL, 0), TAP_INVALID);
+ jtag_add_runtest(strtol(args[0], NULL, 0), jtag_get_end_state());
jtag_execute_queue();
return ERROR_OK;
}
}
-/*-----<Cable Helper API>---------------------------------------*/
-
-/* 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 )
-{
- /* given a stable state, return the index into the tms_seqs[] array within tap_get_tms_path() */
-
- int ndx;
-
- switch( astate )
- {
- 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;
-}
-
-
-/* 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;
-
-};
-
-/*
- * 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).
- */
-#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 )
-{
- return (*tms_seqs)[tap_move_ndx(from)][tap_move_ndx(to)].bits;
-}
-
-
-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;
-}
-
-
-bool tap_is_state_stable(tap_state_t astate)
-{
- bool is_stable;
-
- /* A switch() is used because it is symbol dependent
- (not value dependent like an array), and can also check bounds.
- */
- 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 (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
- {
- 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;
- }
- }
-
- return new_state;
-}
-
-const char* tap_state_name(tap_state_t state)
-{
- const char* ret;
-
- switch( 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;
-}
-
-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;
-
- unsigned tap_out_bits;
- char tms_str[33];
- char tdi_str[33];
-
- tap_state_t last_state;
-
- // 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++)
- {
- // 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);
-
- // 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;
- }
- }
-
- if (tap_out_bits)
- {
- // 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);
- }
-
- DEBUG_JTAG_IO("TAP/SM: FINAL state: %s", tap_state_name(next_state));
-
- return next_state;
-}
-#endif // _DEBUG_JTAG_IO_
-
-void tap_use_new_tms_table(bool use_new)
-{
- tms_seqs = use_new ? &short_tms_seqs : &old_tms_seqs;
-}
-bool tap_uses_new_tms_table(void)
-{
- return tms_seqs == &short_tms_seqs;
-}
-
static int handle_tms_sequence_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
{
if (argc > 1)
return ERROR_OK;
}
-/*-----</Cable Helper API>--------------------------------------*/
-
-
/**
* Function jtag_add_statemove
* moves from the current state to the goal \a state. This needs
jtag_add_pathmove(tms_count, moves);
}
- /* else state must be immediately reachable in one clock cycle, and does not
+ /* 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
Code Review / openocd.git / blobdiff