2 * linux/arch/m32r/mm/fault.c
4 * Copyright (c) 2001, 2002 Hitoshi Yamamoto, and H. Kondo
6 * Some code taken from i386 version.
7 * Copyright (C) 1995 Linus Torvalds
10 #include <linux/signal.h>
11 #include <linux/sched.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
15 #include <linux/types.h>
16 #include <linux/ptrace.h>
17 #include <linux/mman.h>
19 #include <linux/smp.h>
20 #include <linux/interrupt.h>
21 #include <linux/init.h>
22 #include <linux/vt_kern.h> /* For unblank_screen() */
25 #include <asm/system.h>
26 #include <asm/uaccess.h>
27 #include <asm/pgalloc.h>
28 #include <asm/pgtable.h>
29 #include <asm/hardirq.h>
30 #include <asm/mmu_context.h>
32 extern void die(const char *, struct pt_regs *, long);
35 asmlinkage unsigned int tlb_entry_i_dat;
36 asmlinkage unsigned int tlb_entry_d_dat;
37 #define tlb_entry_i tlb_entry_i_dat
38 #define tlb_entry_d tlb_entry_d_dat
40 unsigned int tlb_entry_i_dat[NR_CPUS];
41 unsigned int tlb_entry_d_dat[NR_CPUS];
42 #define tlb_entry_i tlb_entry_i_dat[smp_processor_id()]
43 #define tlb_entry_d tlb_entry_d_dat[smp_processor_id()]
46 void do_BUG(const char *file, int line)
49 printk("kernel BUG at %s:%d!\n", file, line);
52 /*======================================================================*
54 *======================================================================*
55 * This routine handles page faults. It determines the address,
56 * and the problem, and then passes it off to one of the appropriate
61 * error_code : See below
62 * address : M32R MMU MDEVA reg. (Operand ACE)
63 * : M32R BPC reg. (Instruction ACE)
66 * bit 0 == 0 means no page found, 1 means protection fault
67 * bit 1 == 0 means read, 1 means write
68 * bit 2 == 0 means kernel, 1 means user-mode
69 *======================================================================*/
70 asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code,
71 unsigned long address)
75 * Oops. The kernel tried to access some bad page. We'll have to
76 * terminate things with extreme prejudice.
81 if (address < PAGE_SIZE)
82 printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference");
84 printk(KERN_ALERT "Unable to handle kernel paging request");
85 printk(" at virtual address %08lx\n",address);
86 printk(" printing bpc:\n");
87 printk(KERN_ALERT "bpc = %08lx\n", regs->bpc);
89 die("Oops", regs, error_code);
94 /*======================================================================*
96 *======================================================================*/
97 void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr,
103 /*======================================================================*
104 * flush_tlb_page() : flushes one page
105 *======================================================================*/
106 void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
111 /*======================================================================*
112 * flush_tlb_range() : flushes a range of pages
113 *======================================================================*/
114 void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
120 /*======================================================================*
121 * flush_tlb_mm() : flushes the specified mm context TLB's
122 *======================================================================*/
123 void local_flush_tlb_mm(struct mm_struct *mm)
128 /*======================================================================*
129 * flush_tlb_all() : flushes all processes TLBs
130 *======================================================================*/
131 void local_flush_tlb_all(void)