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/*
* arch/sh/mm/fault-nommu.c
*
* Copyright (C) 2002 Paul Mundt
*
* Based on linux/arch/sh/mm/fault.c:
* Copyright (C) 1999 Niibe Yutaka
*
* Released under the terms of the GNU GPL v2.0.
*/
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#if defined(CONFIG_SH_KGDB)
#include <asm/kgdb.h>
#endif
extern void die(const char *,struct pt_regs *,long);
/*
* This routine handles page faults. It determines the address,
* and the problem, and then passes it off to one of the appropriate
* routines.
*/
asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
unsigned long address)
{
#if defined(CONFIG_SH_KGDB)
if (kgdb_nofault && kgdb_bus_err_hook)
kgdb_bus_err_hook();
#endif
/*
* Oops. The kernel tried to access some bad page. We'll have to
* terminate things with extreme prejudice.
*
*/
if (address < PAGE_SIZE) {
printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
} else {
printk(KERN_ALERT "Unable to handle kernel paging request");
}
printk(" at virtual address %08lx\n", address);
printk(KERN_ALERT "pc = %08lx\n", regs->pc);
die("Oops", regs, writeaccess);
do_exit(SIGKILL);
}
asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
unsigned long address)
{
#if defined(CONFIG_SH_KGDB)
if (kgdb_nofault && kgdb_bus_err_hook)
kgdb_bus_err_hook();
#endif
if (address >= TASK_SIZE)
return 1;
return 0;
}
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