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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/lib/r3k_dump_tlb.c
10817 views
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/*

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 * Dump R3000 TLB for debugging purposes.

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 *

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

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

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 * Copyright (C) 1999 by Harald Koerfgen

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 */

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#include <linux/kernel.h>

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#include <linux/mm.h>

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#include <asm/mipsregs.h>

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#include <asm/page.h>

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#include <asm/pgtable.h>

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#include <asm/tlbdebug.h>

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

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static void dump_tlb(int first, int last)

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{

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	int	i;

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	unsigned int asid;

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	unsigned long entryhi, entrylo0;

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	asid = read_c0_entryhi() & 0xfc0;

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

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		write_c0_index(i<<8);

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		__asm__ __volatile__(

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			".set\tnoreorder\n\t"

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			"tlbr\n\t"

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			"nop\n\t"

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			".set\treorder");

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		entryhi  = read_c0_entryhi();

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		entrylo0 = read_c0_entrylo0();

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		/* Unused entries have a virtual address of KSEG0.  */

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		if ((entryhi & 0xffffe000) != 0x80000000

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		    && (entryhi & 0xfc0) == asid) {

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			/*

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			 * Only print entries in use

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			 */

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			printk("Index: %2d ", i);

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			printk("va=%08lx asid=%08lx"

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			       "  [pa=%06lx n=%d d=%d v=%d g=%d]",

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			       (entryhi & 0xffffe000),

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			       entryhi & 0xfc0,

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			       entrylo0 & PAGE_MASK,

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			       (entrylo0 & (1 << 11)) ? 1 : 0,

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			       (entrylo0 & (1 << 10)) ? 1 : 0,

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			       (entrylo0 & (1 << 9)) ? 1 : 0,

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			       (entrylo0 & (1 << 8)) ? 1 : 0);

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		}

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	}

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	printk("\n");

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	write_c0_entryhi(asid);

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}

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void dump_tlb_all(void)

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{

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	dump_tlb(0, current_cpu_data.tlbsize - 1);

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}

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