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>
10
11#include <asm/mipsregs.h>
12#include <asm/mmu_context.h>
13#include <asm/page.h>
14#include <asm/pgtable.h>
15#include <asm/tlbdebug.h>
16
17extern int r3k_have_wired_reg;	/* defined in tlb-r3k.c */
18
19static void dump_tlb(int first, int last)
20{
21	int	i;
22	unsigned int asid;
23	unsigned long entryhi, entrylo0;
24
25	asid = read_c0_entryhi() & ASID_MASK;
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");
34		entryhi	 = read_c0_entryhi();
35		entrylo0 = read_c0_entrylo0();
36
37		/* Unused entries have a virtual address of KSEG0.  */
38		if ((entryhi & PAGE_MASK) != KSEG0
39		    && (entryhi & ASID_MASK) == asid) {
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]",
47			       entryhi & PAGE_MASK,
48			       entryhi & ASID_MASK,
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
61void dump_tlb_all(void)
62{
63	dump_tlb(0, current_cpu_data.tlbsize - 1);
64}
65