Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * Dump R4x00 TLB for debugging purposes.

 *

 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.

 * Copyright (C) 1999 by Silicon Graphics, Inc.

 */

#include <linux/kernel.h>

#include <linux/mm.h>

#include <asm/mipsregs.h>

#include <asm/page.h>

#include <asm/pgtable.h>

#include <asm/tlbdebug.h>

static inline const char *msk2str(unsigned int mask)

{

        switch (mask) {

        case PM_4K:     return "4kb";

        case PM_16K:    return "16kb";

        case PM_64K:    return "64kb";

        case PM_256K:   return "256kb";

#ifndef CONFIG_CPU_VR41XX

        case PM_1M:     return "1Mb";

        case PM_4M:     return "4Mb";

        case PM_16M:    return "16Mb";

        case PM_64M:    return "64Mb";

        case PM_256M:   return "256Mb";

#endif

        }

        return "";

}

#define BARRIER()                                       \

        __asm__ __volatile__(                           \

                ".set\tnoreorder\n\t"                   \

                "nop;nop;nop;nop;nop;nop;nop\n\t"       \

                ".set\treorder");

static void dump_tlb(int first, int last)

{

        unsigned long s_entryhi, entryhi, asid;

        unsigned long long entrylo0, entrylo1;

        unsigned int s_index, pagemask, c0, c1, i;

        s_entryhi = read_c0_entryhi();

        s_index = read_c0_index();

        asid = s_entryhi & 0xff;

        for (i = first; i <= last; i++) {

                write_c0_index(i);

                BARRIER();

                tlb_read();

                BARRIER();

                pagemask = read_c0_pagemask();

                entryhi  = read_c0_entryhi();

                entrylo0 = read_c0_entrylo0();

                entrylo1 = read_c0_entrylo1();

                /* Unused entries have a virtual address of CKSEG0.  */

                if ((entryhi & ~0x1ffffUL) != CKSEG0

                    && (entryhi & 0xff) == asid) {

#ifdef CONFIG_32BIT

                        int width = 8;

#else

                        int width = 11;

#endif

                        /*

                         * Only print entries in use

                         */

                        printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));

                        c0 = (entrylo0 >> 3) & 7;

                        c1 = (entrylo1 >> 3) & 7;

                        printk("va=%0*lx asid=%02lx\n",

                               width, (entryhi & ~0x1fffUL),

                               entryhi & 0xff);

                        printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ",

                               width,

                               (entrylo0 << 6) & PAGE_MASK, c0,

                               (entrylo0 & 4) ? 1 : 0,

                               (entrylo0 & 2) ? 1 : 0,

                               (entrylo0 & 1) ? 1 : 0);

                        printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n",

                               width,

                               (entrylo1 << 6) & PAGE_MASK, c1,

                               (entrylo1 & 4) ? 1 : 0,

                               (entrylo1 & 2) ? 1 : 0,

                               (entrylo1 & 1) ? 1 : 0);

                }

        }

        printk("\n");

        write_c0_entryhi(s_entryhi);

        write_c0_index(s_index);

}

void dump_tlb_all(void)

{

        dump_tlb(0, current_cpu_data.tlbsize - 1);

}