Title: [5302] branches/2008R1/arch/blackfin/mach-common: Fix BUG [#4412] BF533 + 0.5 silicon + MPU + UART PIO -> crash
- Revision
- 5302
- Author
- hennerich
- Date
- 2008-09-17 04:41:58 -0500 (Wed, 17 Sep 2008)
Log Message
Fix BUG [#4412] 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.
Modified Paths
Diff
Modified: branches/2008R1/arch/blackfin/mach-common/entry.S (5301 => 5302)
--- branches/2008R1/arch/blackfin/mach-common/entry.S 2008-09-17 09:34:11 UTC (rev 5301)
+++ branches/2008R1/arch/blackfin/mach-common/entry.S 2008-09-17 09:41:58 UTC (rev 5302)
@@ -403,6 +403,16 @@
/* Try to deal with syscalls quickly. */
[--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
+
DEBUG_STOP_HWTRACE(p5, r7)
r7 = SEQSTAT; /* reason code is in bit 5:0 */
r6.l = lo(SEQSTAT_EXCAUSE);
@@ -923,6 +933,15 @@
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);
Modified: branches/2008R1/arch/blackfin/mach-common/interrupt.S (5301 => 5302)
--- branches/2008R1/arch/blackfin/mach-common/interrupt.S 2008-09-17 09:34:11 UTC (rev 5301)
+++ branches/2008R1/arch/blackfin/mach-common/interrupt.S 2008-09-17 09:41:58 UTC (rev 5302)
@@ -143,7 +143,7 @@
fp = 0;
#endif
-#if ANOMALY_05000283
+#if ANOMALY_05000283 || ANOMALY_05000315
cc = r7 == r7;
p5.h = HI(CHIPID);
p5.l = LO(CHIPID);
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