[mirror_ubuntu-artful-kernel.git] / arch / mips / lib / 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/mmu_context.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() & ASID_MASK;

	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 & PAGE_MASK) != KSEG0
		    && (entryhi & ASID_MASK) == 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 & PAGE_MASK,
			       entryhi & ASID_MASK,
			       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);
}
Commit	Line	Data
1da177e4 LT	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>
1da177e4	10
1da177e4	11	#include <asm/mipsregs.h>
80e8bd26	12	#include <asm/mmu_context.h>
1da177e4 LT	13	#include <asm/page.h>
1da177e4 LT	14	#include <asm/pgtable.h>
40df3831	15	#include <asm/tlbdebug.h>
1da177e4 LT	16
	17	extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */
	18
69ed25b8	19	static void dump_tlb(int first, int last)
1da177e4 LT	20	{
	21	int i;
	22	unsigned int asid;
	23	unsigned long entryhi, entrylo0;
	24
80e8bd26	25	asid = read_c0_entryhi() & ASID_MASK;
1da177e4 LT	26
	27	for (i = first; i <= last; i++) {
	28	write_c0_index(i<<8);
	29	__asm__ __volatile__(
	30	".set\tnoreorder\n\t"
	31	"tlbr\n\t"
	32	"nop\n\t"
	33	".set\treorder");
70342287	34	entryhi = read_c0_entryhi();
1da177e4 LT	35	entrylo0 = read_c0_entrylo0();
	36
	37	/* Unused entries have a virtual address of KSEG0. */
80e8bd26 IM	38	if ((entryhi & PAGE_MASK) != KSEG0
80e8bd26 IM	39	&& (entryhi & ASID_MASK) == asid) {
1da177e4 LT	40	/*
	41	* Only print entries in use
	42	*/
	43	printk("Index: %2d ", i);
	44
	45	printk("va=%08lx asid=%08lx"
	46	" [pa=%06lx n=%d d=%d v=%d g=%d]",
432d9ecb	47	entryhi & PAGE_MASK,
80e8bd26	48	entryhi & ASID_MASK,
1da177e4 LT	49	entrylo0 & PAGE_MASK,
	50	(entrylo0 & (1 << 11)) ? 1 : 0,
	51	(entrylo0 & (1 << 10)) ? 1 : 0,
	52	(entrylo0 & (1 << 9)) ? 1 : 0,
	53	(entrylo0 & (1 << 8)) ? 1 : 0);
	54	}
	55	}
	56	printk("\n");
	57
	58	write_c0_entryhi(asid);
	59	}
	60
	61	void dump_tlb_all(void)
	62	{
	63	dump_tlb(0, current_cpu_data.tlbsize - 1);
	64	}