diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2008-10-09 00:31:03 -0400 |
---|---|---|
committer | Bryan Wu <cooloney@kernel.org> | 2008-10-09 00:31:03 -0400 |
commit | 5e9e7687cbc016ac36b6825f79d78213319331d9 (patch) | |
tree | fc65bee0d57bff2e01b158753f0df9f68606bba3 /arch/blackfin/mach-common/entry.S | |
parent | 49f7253cc9a5002c3f2aef4ab96df62204ac7052 (diff) |
Blackfin arch: Fix BUG -- BF533 + 0.5 silicon + MPU + UART PIO -> crash
Apply ANOMALY_05000283 & ANOMALY_05000315
Workaround also to the EXCEPTION path.
Cover evt_ivhw also with ANOMALY_05000315
The Workaround needs to be prior to accesses (either read or write) to
any system MMR.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common/entry.S')
-rw-r--r-- | arch/blackfin/mach-common/entry.S | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 5a219b228de3..76c42d3b5e85 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S | |||
@@ -484,6 +484,15 @@ ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/ | |||
484 | [--sp] = ASTAT; | 484 | [--sp] = ASTAT; |
485 | [--sp] = (R7:6,P5:4); | 485 | [--sp] = (R7:6,P5:4); |
486 | 486 | ||
487 | #if ANOMALY_05000283 || ANOMALY_05000315 | ||
488 | cc = r7 == r7; | ||
489 | p5.h = HI(CHIPID); | ||
490 | p5.l = LO(CHIPID); | ||
491 | if cc jump 1f; | ||
492 | r7.l = W[p5]; | ||
493 | 1: | ||
494 | #endif | ||
495 | |||
487 | #ifdef CONFIG_DEBUG_DOUBLEFAULT | 496 | #ifdef CONFIG_DEBUG_DOUBLEFAULT |
488 | /* | 497 | /* |
489 | * Save these registers, as they are only valid in exception context | 498 | * Save these registers, as they are only valid in exception context |
@@ -1020,6 +1029,15 @@ ENTRY(_early_trap) | |||
1020 | SAVE_ALL_SYS | 1029 | SAVE_ALL_SYS |
1021 | trace_buffer_stop(p0,r0); | 1030 | trace_buffer_stop(p0,r0); |
1022 | 1031 | ||
1032 | #if ANOMALY_05000283 || ANOMALY_05000315 | ||
1033 | cc = r5 == r5; | ||
1034 | p4.h = HI(CHIPID); | ||
1035 | p4.l = LO(CHIPID); | ||
1036 | if cc jump 1f; | ||
1037 | r5.l = W[p4]; | ||
1038 | 1: | ||
1039 | #endif | ||
1040 | |||
1023 | /* Turn caches off, to ensure we don't get double exceptions */ | 1041 | /* Turn caches off, to ensure we don't get double exceptions */ |
1024 | 1042 | ||
1025 | P4.L = LO(IMEM_CONTROL); | 1043 | P4.L = LO(IMEM_CONTROL); |