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| author | Øyvind Harboe <oyvind.harboe@zylin.com> | 2010-03-16 11:40:52 +0100 |
|---|---|---|
| committer | Øyvind Harboe <oyvind.harboe@zylin.com> | 2010-03-17 07:40:00 +0100 |
| commit | 7e447043cd7967bd9b8976d829d5cb79bf359d3c (patch) | |
| tree | 8c509eba3047c60e0698dc4ead31fa7e89b324f4 /src | |
| parent | 1d9fba8c1488c3774c8bde737c2d658b1f525d09 (diff) | |
| download | openocd+libswd-7e447043cd7967bd9b8976d829d5cb79bf359d3c.tar.gz openocd+libswd-7e447043cd7967bd9b8976d829d5cb79bf359d3c.tar.bz2 openocd+libswd-7e447043cd7967bd9b8976d829d5cb79bf359d3c.tar.xz openocd+libswd-7e447043cd7967bd9b8976d829d5cb79bf359d3c.zip | |
zy1000: tweak the DCC inner loop a tiny bit
Uses FIFO a bit more efficiently now.
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/jtag/zy1000/zy1000.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/jtag/zy1000/zy1000.c b/src/jtag/zy1000/zy1000.c index 005a4e02..177d286d 100644 --- a/src/jtag/zy1000/zy1000.c +++ b/src/jtag/zy1000/zy1000.c @@ -839,7 +839,7 @@ void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, int post_bits; jtag_pre_post_bits(tap, &pre_bits, &post_bits); - if ((pre_bits > 32) || (post_bits > 32)) + if (pre_bits + post_bits + 6 > 32) { int i; for (i = 0; i < count; i++) @@ -854,15 +854,18 @@ void embeddedice_write_dcc(struct jtag_tap *tap, int reg_addr, uint8_t *buffer, if (post_bits == 0) shift_end_state = end_state; + shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, pre_bits, 0); int i; - for (i = 0; i < count; i++) + for (i = 0; i < count - 1; i++) { - shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, pre_bits, 0); + /* Fewer pokes means we get to use the FIFO more efficiently */ shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, little)); - shiftValueInner(TAP_DRSHIFT, shift_end_state, 6, reg_addr | (1 << 5)); - shiftValueInner(shift_end_state, end_state, post_bits, 0); + shiftValueInner(TAP_DRSHIFT, shift_end_state, 6 + post_bits + pre_bits, (reg_addr | (1 << 5))); buffer += 4; } + shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, 32, fast_target_buffer_get_u32(buffer, little)); + shiftValueInner(TAP_DRSHIFT, shift_end_state, 6, reg_addr | (1 << 5)); + shiftValueInner(shift_end_state, end_state, post_bits, 0); } } |