diff options
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index 427294c47f1..e4fd516ce48 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -524,6 +524,36 @@ asmlinkage notrace void trap_c(struct pt_regs *fp) break; /* External Memory Addressing Error */ case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): + if (ANOMALY_05000310) { + static unsigned long anomaly_rets; + + if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && + (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { + /* + * A false hardware error will happen while fetching at + * the L1 instruction SRAM boundary. Ignore it. + */ + anomaly_rets = fp->rets; + goto traps_done; + } else if (fp->rets == anomaly_rets) { + /* + * While boundary code returns to a function, at the ret + * point, a new false hardware error might occur too based + * on tests. Ignore it too. + */ + goto traps_done; + } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && + (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { + /* + * If boundary code calls a function, at the entry point, + * a new false hardware error maybe happen based on tests. + * Ignore it too. + */ + goto traps_done; + } else + anomaly_rets = 0; + } + info.si_code = BUS_ADRERR; sig = SIGBUS; strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); |