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Blackfin: handle anomaly 05000257

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Need to reload the loop counters to keep from corrupting hardware loops.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Robin Getz 2009-12-21 17:02:48 -05:00 committed by Mike Frysinger
parent b6db283440
commit 03642aeee0
1 changed files with 10 additions and 1 deletions
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11
cpu/blackfin/interrupt.S
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@ -1,7 +1,7 @@
/*
* interrupt.S - trampoline default exceptions/interrupts to C handlers
*
* Copyright (c) 2005-2007 Analog Devices Inc.
* Copyright (c) 2005-2009 Analog Devices Inc.
* Licensed under the GPL-2 or later.
*/
@ -17,10 +17,19 @@ ENTRY(_trap)
sp.l = LO(L1_SRAM_SCRATCH_END - 20);
sp.h = HI(L1_SRAM_SCRATCH_END - 20);
SAVE_ALL_SYS
r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
sp += -12;
call _trap_c;
sp += 12;
#if ANOMALY_05000257
R7 = LC0;
LC0 = R7;
R7 = LC1;
LC1 = R7;
#endif
RESTORE_ALL_SYS
sp = CONFIG_BFIN_SCRATCH_REG;
rtx;