r3k_dump_tlb.c

Go to the documentation of this file.

/*
 * 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);
}