/* * 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 */ #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 <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 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(); }