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r3k_dump_tlb.c

/*
 * Dump R3000 TLB for debugging purposes.
 *
 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
 * Copyright (C) 1999 by Silicon Graphics, Inc.
 * Copyright (C) 1999 by Harald Koerfgen
 */
#include <linux/kernel.h>
#include <linux/mm.h>

#include <asm/mipsregs.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/tlbdebug.h>

extern int r3k_have_wired_reg;      /* defined in tlb-r3k.c */

static void dump_tlb(int first, int last)
{
      int   i;
      unsigned int asid;
      unsigned long entryhi, entrylo0;

      asid = read_c0_entryhi() & 0xfc0;

      for (i = first; i <= last; i++) {
            write_c0_index(i<<8);
            __asm__ __volatile__(
                  ".set\tnoreorder\n\t"
                  "tlbr\n\t"
                  "nop\n\t"
                  ".set\treorder");
            entryhi  = read_c0_entryhi();
            entrylo0 = read_c0_entrylo0();

            /* Unused entries have a virtual address of KSEG0.  */
            if ((entryhi & 0xffffe000) != 0x80000000
                && (entryhi & 0xfc0) == asid) {
                  /*
                   * Only print entries in use
                   */
                  printk("Index: %2d ", i);

                  printk("va=%08lx asid=%08lx"
                         "  [pa=%06lx n=%d d=%d v=%d g=%d]",
                         (entryhi & 0xffffe000),
                         entryhi & 0xfc0,
                         entrylo0 & PAGE_MASK,
                         (entrylo0 & (1 << 11)) ? 1 : 0,
                         (entrylo0 & (1 << 10)) ? 1 : 0,
                         (entrylo0 & (1 << 9)) ? 1 : 0,
                         (entrylo0 & (1 << 8)) ? 1 : 0);
            }
      }
      printk("\n");

      write_c0_entryhi(asid);
}

void dump_tlb_all(void)
{
      dump_tlb(0, current_cpu_data.tlbsize - 1);
}

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