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SimonQian <simonqian@SimonQian.com>: 

This patch allows the vsllink to support very large scan sizes in DMA mode.


git-svn-id: svn://svn.berlios.de/openocd/trunk@1926 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
zwelch 2009-05-27 12:06:51 +00:00
parent ff2737b429
commit df60933321
1 changed files with 30 additions and 14 deletions
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44
src/jtag/vsllink.c
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@ -710,10 +710,10 @@ static void vsllink_state_move_dma(void)
&VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())];
u8 tms_scan = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
vsllink_tap_ensure_space(0, 8);
if (tap_get_state() == TAP_RESET)
{
vsllink_tap_ensure_space(0, 8);
for (i = 0; i < 8; i++)
{
vsllink_tap_append_step(1, 0);
@ -1318,7 +1318,6 @@ static void vsllink_scan_dma(bool ir_scan, enum scan_type type, u8 *buffer, int
vsllink_end_state(saved_end_state);
/* Scan */
vsllink_tap_ensure_space(1, (scan_size + 7) & ~0x00000007);
vsllink_tap_append_scan_dma(scan_size, buffer, command);
tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
@ -1581,20 +1580,37 @@ static void vsllink_tap_append_scan_normal(int length, u8 *buffer, scan_command_
}
static void vsllink_tap_append_scan_dma(int length, u8 *buffer, scan_command_t *command)
{
pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
int i;
pending_scan_result_t *pending_scan_result;
int len_tmp, len_all, i;
pending_scan_result->offset = tap_length;
pending_scan_result->length = length;
pending_scan_result->command = command;
pending_scan_result->buffer = buffer;
for (i = 0; i < length; i++)
len_all = 0;
while (len_all < length)
{
vsllink_tap_append_step((i < length-1 ? 0 : 1), (buffer[i/8] >> (i%8)) & 1);
if ((length - len_all) > tap_buffer_size * 8)
{
len_tmp = tap_buffer_size * 8;
}
else
{
len_tmp = length - len_all;
}
vsllink_tap_ensure_space(1, (len_tmp + 7) & ~7);
pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
pending_scan_result->offset = tap_length;
pending_scan_result->length = len_tmp;
pending_scan_result->command = command;
pending_scan_result->buffer = buffer + len_all / 8;
for (i = 0; i < len_tmp; i++)
{
vsllink_tap_append_step(((len_all+i) < length-1 ? 0 : 1), (buffer[(len_all+i)/8] >> ((len_all+i)%8)) & 1);
}
pending_scan_results_length++;
len_all += len_tmp;
}
pending_scan_results_length++;
}
/* Pad and send a tap sequence to the device, and receive the answer.