LXR linux/arch/mips/lib/r3k_dump

   1/*
   2 * Dump R3000 TLB for debugging purposes.
   3 *
   4 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
   5 * Copyright (C) 1999 by Silicon Graphics, Inc.
   6 * Copyright (C) 1999 by Harald Koerfgen
   7 */
   8#include <linux/kernel.h>
   9#include <linux/mm.h>
  10
  11#include <asm/mipsregs.h>
  12#include <asm/page.h>
  13#include <asm/pgtable.h>
  14#include <asm/tlbdebug.h>
  15
  16extern int r3k_have_wired_reg;  /* defined in tlb-r3k.c */
  17
  18static void dump_tlb(int first, int last)
  19{
  20        int     i;
  21        unsigned int asid;
  22        unsigned long entryhi, entrylo0;
  23
  24        asid = read_c0_entryhi() & 0xfc0;
  25
  26        for (i = first; i <= last; i++) {
  27                write_c0_index(i<<8);
  28                __asm__ __volatile__(
  29                        ".set\tnoreorder\n\t"
  30                        "tlbr\n\t"
  31                        "nop\n\t"
  32                        ".set\treorder");
  33                entryhi  = read_c0_entryhi();
  34                entrylo0 = read_c0_entrylo0();
  35
  36                /* Unused entries have a virtual address of KSEG0.  */
  37                if ((entryhi & 0xffffe000) != 0x80000000
  38                    && (entryhi & 0xfc0) == asid) {
  39                        /*
  40                         * Only print entries in use
  41                         */
  42                        printk("Index: %2d ", i);
  43
  44                        printk("va=%08lx asid=%08lx"
  45                               "  [pa=%06lx n=%d d=%d v=%d g=%d]",
  46                               (entryhi & 0xffffe000),
  47                               entryhi & 0xfc0,
  48                               entrylo0 & PAGE_MASK,
  49                               (entrylo0 & (1 << 11)) ? 1 : 0,
  50                               (entrylo0 & (1 << 10)) ? 1 : 0,
  51                               (entrylo0 & (1 << 9)) ? 1 : 0,
  52                               (entrylo0 & (1 << 8)) ? 1 : 0);
  53                }
  54        }
  55        printk("\n");
  56
  57        write_c0_entryhi(asid);
  58}
  59
  60void dump_tlb_all(void)
  61{
  62        dump_tlb(0, current_cpu_data.tlbsize - 1);
  63}
  64