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authorMichael Hennerich <michael.hennerich@analog.com>2008-10-09 12:31:03 +0800
committerBryan Wu <cooloney@kernel.org>2008-10-09 12:31:03 +0800
commit5e9e7687cbc016ac36b6825f79d78213319331d9 (patch)
treefc65bee0d57bff2e01b158753f0df9f68606bba3
parentBlackfin arch: add support for BF52x-0.2, BF533-0.6, and BF54x-0.2 (diff)
downloadlinux-dev-5e9e7687cbc016ac36b6825f79d78213319331d9.tar.xz
linux-dev-5e9e7687cbc016ac36b6825f79d78213319331d9.zip
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 '')
-rw-r--r--arch/blackfin/mach-common/entry.S18
-rw-r--r--arch/blackfin/mach-common/interrupt.S2
2 files changed, 19 insertions, 1 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)*/
[--sp] = ASTAT;
[--sp] = (R7:6,P5:4);
+#if ANOMALY_05000283 || ANOMALY_05000315
+ cc = r7 == r7;
+ p5.h = HI(CHIPID);
+ p5.l = LO(CHIPID);
+ if cc jump 1f;
+ r7.l = W[p5];
+1:
+#endif
+
#ifdef CONFIG_DEBUG_DOUBLEFAULT
/*
* Save these registers, as they are only valid in exception context
@@ -1020,6 +1029,15 @@ ENTRY(_early_trap)
SAVE_ALL_SYS
trace_buffer_stop(p0,r0);
+#if ANOMALY_05000283 || ANOMALY_05000315
+ cc = r5 == r5;
+ p4.h = HI(CHIPID);
+ p4.l = LO(CHIPID);
+ if cc jump 1f;
+ r5.l = W[p4];
+1:
+#endif
+
/* Turn caches off, to ensure we don't get double exceptions */
P4.L = LO(IMEM_CONTROL);
diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S
index b27e59d32401..647f0f522910 100644
--- a/arch/blackfin/mach-common/interrupt.S
+++ b/arch/blackfin/mach-common/interrupt.S
@@ -143,7 +143,7 @@ ENTRY(_evt_ivhw)
fp = 0;
#endif
-#if ANOMALY_05000283
+#if ANOMALY_05000283 || ANOMALY_05000315
cc = r7 == r7;
p5.h = HI(CHIPID);
p5.l = LO(CHIPID);