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authorRobin Getz <rgetz@blackfin.uclinux.org>2009-03-05 18:18:49 +0800
committerBryan Wu <cooloney@kernel.org>2009-03-05 18:18:49 +0800
commit00049522425e8390d1815e1579733644ad2bb0c7 (patch)
treecef5c9a4440f376ad4796a6c1b80f57cd8311950 /arch/blackfin
parent5047607f0170b1f797a2fe37bb45310c1e1d5ce0 (diff)
downloadlinux-linaro-android-00049522425e8390d1815e1579733644ad2bb0c7.tar.gz
Blackfin arch: Random read/write errors are a bad thing
Random read/write errors are a bad thing - so don't let anyone (including the test bench) run on something we know is bad. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/setup.c4
-rw-r--r--arch/blackfin/mach-common/arch_checks.c6
2 files changed, 10 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index e5c11623080..4646b985cc9 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -889,6 +889,10 @@ void __init setup_arch(char **cmdline_p)
CPU, bfin_revid());
}
+ /* We can't run on BF548-0.1 due to ANOMALY 05000448 */
+ if (bfin_cpuid() == 0x27de && bfin_revid() == 1)
+ panic("You can't run on this processor due to 05000448\n");
+
printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c
index b3a2e3fa15e..a2ca26aa210 100644
--- a/arch/blackfin/mach-common/arch_checks.c
+++ b/arch/blackfin/mach-common/arch_checks.c
@@ -67,3 +67,9 @@
#if ((0xffffffff - L1_CODE_START + 1) + CONFIG_BOOT_LOAD) > 0x1000000
# error "The kernel load address is too high; keep it below 10meg for safety"
#endif
+
+#ifdef ANOMALY_05000448
+# if ANOMALY_05000448
+# error You are using a part with anomaly 05000448, this issue causes random memory read/write failures - that means random crashes.
+# endif
+#endif