1 files changed, 165 insertions, 0 deletions

diff --git a/arch/m32r/mm/fault-nommu.c b/arch/m32r/mm/fault-nommu.c
new file mode 100644
index 000000000000..d9d488d782e8
--- /dev/null
+++ b/arch/m32r/mm/fault-nommu.c
@@ -0,0 +1,165 @@
+/*
+ *  linux/arch/m32r/mm/fault.c
+ *
+ *  Copyright (c) 2001, 2002  Hitoshi Yamamoto, and H. Kondo
+ *
+ *  Some code taken from i386 version.
+ *    Copyright (C) 1995  Linus Torvalds
+ */
+
+/* $Id: fault-nommu.c,v 1.1 2004/03/30 06:40:59 sakugawa Exp $ */
+
+#include <linux/config.h>
+#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/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/vt_kern.h>              /* For unblank_screen() */
+
+#include <asm/m32r.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/hardirq.h>
+#include <asm/mmu_context.h>
+
+extern void die(const char *, struct pt_regs *, long);
+
+#ifndef CONFIG_SMP
+asmlinkage unsigned int tlb_entry_i_dat;
+asmlinkage unsigned int tlb_entry_d_dat;
+#define tlb_entry_i tlb_entry_i_dat
+#define tlb_entry_d tlb_entry_d_dat
+#else
+unsigned int tlb_entry_i_dat[NR_CPUS];
+unsigned int tlb_entry_d_dat[NR_CPUS];
+#define tlb_entry_i tlb_entry_i_dat[smp_processor_id()]
+#define tlb_entry_d tlb_entry_d_dat[smp_processor_id()]
+#endif
+
+/*
+ * Unlock any spinlocks which will prevent us from getting the
+ * message out
+ */
+void bust_spinlocks(int yes)
+{
+        int loglevel_save = console_loglevel;
+
+        if (yes) {
+                oops_in_progress = 1;
+                return;
+        }
+#ifdef CONFIG_VT
+        unblank_screen();
+#endif
+        oops_in_progress = 0;
+        /*
+         * OK, the message is on the console.  Now we call printk()
+         * without oops_in_progress set so that printk will give klogd
+         * a poke.  Hold onto your hats...
+         */
+        console_loglevel = 15;          /* NMI oopser may have shut the console up */
+        printk(" ");
+        console_loglevel = loglevel_save;
+}
+
+void do_BUG(const char *file, int line)
+{
+        bust_spinlocks(1);
+        printk("kernel BUG at %s:%d!\n", file, line);
+}
+
+/*======================================================================*
+ * do_page_fault()
+ *======================================================================*
+ * This routine handles page faults.  It determines the address,
+ * and the problem, and then passes it off to one of the appropriate
+ * routines.
+ *
+ * ARGUMENT:
+ *  regs       : M32R SP reg.
+ *  error_code : See below
+ *  address    : M32R MMU MDEVA reg. (Operand ACE)
+ *             : M32R BPC reg. (Instruction ACE)
+ *
+ * error_code :
+ *  bit 0 == 0 means no page found, 1 means protection fault
+ *  bit 1 == 0 means read, 1 means write
+ *  bit 2 == 0 means kernel, 1 means user-mode
+ *======================================================================*/
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code,
+  unsigned long address)
+{
+
+/*
+ * Oops. The kernel tried to access some bad page. We'll have to
+ * terminate things with extreme prejudice.
+ */
+
+        bust_spinlocks(1);
+
+        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(" printing bpc:\n");
+        printk(KERN_ALERT "bpc = %08lx\n", regs->bpc);
+
+        die("Oops", regs, error_code);
+        bust_spinlocks(0);
+        do_exit(SIGKILL);
+}
+
+/*======================================================================*
+ * update_mmu_cache()
+ *======================================================================*/
+void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
+        pte_t pte)
+{
+        BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_page() : flushes one page
+ *======================================================================*/
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+        BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_range() : flushes a range of pages
+ *======================================================================*/
+void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+        unsigned long end)
+{
+        BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_mm() : flushes the specified mm context TLB's
+ *======================================================================*/
+void local_flush_tlb_mm(struct mm_struct *mm)
+{
+        BUG();
+}
+
+/*======================================================================*
+ * flush_tlb_all() : flushes all processes TLBs
+ *======================================================================*/
+void local_flush_tlb_all(void)
+{
+        BUG();
+}
+