diff options
Diffstat (limited to 'arch/sparc64/mm/fault.c')
| -rw-r--r-- | arch/sparc64/mm/fault.c | 64 |
1 files changed, 52 insertions, 12 deletions
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c index 04aa8284e..1a20b399b 100644 --- a/arch/sparc64/mm/fault.c +++ b/arch/sparc64/mm/fault.c @@ -1,4 +1,4 @@ -/* $Id: fault.c,v 1.36 1999/07/04 04:35:56 davem Exp $ +/* $Id: fault.c,v 1.39 1999/08/30 10:07:09 davem Exp $ * arch/sparc64/mm/fault.c: Page fault handlers for the 64-bit Sparc. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) @@ -84,10 +84,11 @@ void unhandled_fault(unsigned long address, struct task_struct *tsk, printk(KERN_ALERT "Unable to handle kernel paging request " "at virtual address %016lx\n", (unsigned long)address); } - printk(KERN_ALERT "tsk->mm->context = %016lx\n", - (unsigned long) tsk->mm->context); - printk(KERN_ALERT "tsk->mm->pgd = %016lx\n", - (unsigned long) tsk->mm->pgd); + printk(KERN_ALERT "tsk->{mm,active_mm}->context = %016lx\n", + (tsk->mm ? tsk->mm->context : tsk->active_mm->context)); + printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %016lx\n", + (tsk->mm ? (unsigned long) tsk->mm->pgd : + (unsigned long) tsk->active_mm->pgd)); die_if_kernel("Oops", regs); } @@ -154,16 +155,45 @@ asmlinkage void do_sparc64_fault(struct pt_regs *regs, unsigned long address, in * If we're in an interrupt or have no user * context, we must not take the fault.. */ - if (in_interrupt() || mm == &init_mm) + if (in_interrupt() || !mm) goto do_kernel_fault; down(&mm->mmap_sem); #ifdef DEBUG_LOCKUPS - if (regs->tpc == lastpc && address == lastaddr && write == lastwrite) { + if (regs->tpc == lastpc && + address == lastaddr && + write == lastwrite) { lockcnt++; if (lockcnt == 100000) { - printk("do_sparc64_fault: possible fault loop for %016lx %s\n", address, write ? "write" : "read"); + unsigned char tmp; + register unsigned long tmp1 asm("o5"); + register unsigned long tmp2 asm("o4"); + + printk("do_sparc64_fault[%s:%d]: possible fault loop for %016lx %s\n", + current->comm, current->pid, + address, write ? "write" : "read"); + printk("do_sparc64_fault: CHECK[papgd[%016lx],pcac[%016lx]]\n", + __pa(mm->pgd), pgd_val(mm->pgd[0])<<11UL); + __asm__ __volatile__( + "wrpr %%g0, 0x494, %%pstate\n\t" + "mov %3, %%g4\n\t" + "mov %%g7, %0\n\t" + "ldxa [%%g4] %2, %1\n\t" + "wrpr %%g0, 0x096, %%pstate" + : "=r" (tmp1), "=r" (tmp2) + : "i" (ASI_DMMU), "i" (TSB_REG)); + printk("do_sparc64_fault: IS[papgd[%016lx],pcac[%016lx]]\n", + tmp1, tmp2); + printk("do_sparc64_fault: CHECK[ctx(%016lx)] IS[ctx(%016lx)]\n", + mm->context, spitfire_get_secondary_context()); + __asm__ __volatile__("rd %%asi, %0" + : "=r" (tmp)); + printk("do_sparc64_fault: CHECK[seg(%02x)] IS[seg(%02x)]\n", + current->thread.current_ds.seg, tmp); show_regs(regs); + __sti(); + while(1) + barrier(); } } else { lastpc = regs->tpc; @@ -282,8 +312,18 @@ do_kernel_fault: return; } } else { - current->tss.sig_address = address; - current->tss.sig_desc = SUBSIG_NOMAPPING; +#if 0 + extern void __show_regs(struct pt_regs *); + printk("SHIT(%s:%d:cpu(%d)): PC[%016lx] ADDR[%016lx]\n", + current->comm, current->pid, smp_processor_id(), + regs->tpc, address); + __show_regs(regs); + __sti(); + while(1) + barrier(); +#endif + current->thread.sig_address = address; + current->thread.sig_desc = SUBSIG_NOMAPPING; force_sig(SIGSEGV, current); return; } @@ -293,8 +333,8 @@ do_kernel_fault: do_sigbus: up(&mm->mmap_sem); - current->tss.sig_address = address; - current->tss.sig_desc = SUBSIG_MISCERROR; + current->thread.sig_address = address; + current->thread.sig_desc = SUBSIG_MISCERROR; force_sig(SIGBUS, current); if (regs->tstate & TSTATE_PRIV) goto do_kernel_fault; |