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arm11: disable broken optimization for setting current scan chain

This commit is contained in:
Øyvind Harboe 2011-08-05 09:57:46 +02:00
parent 0d7a948c8d
commit bbd84417f6
1 changed files with 6 additions and 0 deletions
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6
src/target/arm11_dbgtap.c
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@ -199,11 +199,17 @@ int arm11_add_debug_SCAN_N(struct arm11_common *arm11,
* NOTE: the ITRSEL instruction fakes SCREG changing; * NOTE: the ITRSEL instruction fakes SCREG changing;
* but leaves its actual value unchanged. * but leaves its actual value unchanged.
*/ */
#if 0
// FIX!!! the optimization below is broken because we do not
// invalidate the cur_scan_chain upon a TRST/TMS. See arm_jtag.c
// for example on how to invalidate cur_scan_chain. Tested patches gladly
// accepted!
if (arm11->jtag_info.cur_scan_chain == chain) { if (arm11->jtag_info.cur_scan_chain == chain) {
JTAG_DEBUG("SCREG <= %d SKIPPED", chain); JTAG_DEBUG("SCREG <= %d SKIPPED", chain);
return jtag_add_statemove((state == ARM11_TAP_DEFAULT) return jtag_add_statemove((state == ARM11_TAP_DEFAULT)
? TAP_DRPAUSE : state); ? TAP_DRPAUSE : state);
} }
#endif
JTAG_DEBUG("SCREG <= %d", chain); JTAG_DEBUG("SCREG <= %d", chain);
arm11_add_IR(arm11, ARM11_SCAN_N, ARM11_TAP_DEFAULT); arm11_add_IR(arm11, ARM11_SCAN_N, ARM11_TAP_DEFAULT);