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;
18
19void dump_tlb_regs(void)
20{
21	pr_info("Index    : %0x\n", read_c0_index());
22	pr_info("EntryHi  : %0lx\n", read_c0_entryhi());
23	pr_info("EntryLo  : %0lx\n", read_c0_entrylo0());
24	if (r3k_have_wired_reg)
25		pr_info("Wired    : %0x\n", read_c0_wired());
26}
27
28static void dump_tlb(int first, int last)
29{
30	int	i;
31	unsigned int asid;
32	unsigned long entryhi, entrylo0;
33
34	asid = read_c0_entryhi() & ASID_MASK;
 
35
36	for (i = first; i <= last; i++) {
37		write_c0_index(i<<8);
38		__asm__ __volatile__(
39			".set\tnoreorder\n\t"
40			"tlbr\n\t"
41			"nop\n\t"
42			".set\treorder");
43		entryhi	 = read_c0_entryhi();
44		entrylo0 = read_c0_entrylo0();
45
46		/* Unused entries have a virtual address of KSEG0.  */
47		if ((entryhi & PAGE_MASK) != KSEG0 &&
48		    (entrylo0 & R3K_ENTRYLO_G ||
49		     (entryhi & ASID_MASK) == asid)) {
50			/*
51			 * Only print entries in use
52			 */
53			printk("Index: %2d ", i);
54
55			printk("va=%08lx asid=%08lx"
56			       "  [pa=%06lx n=%d d=%d v=%d g=%d]",
57			       entryhi & PAGE_MASK,
58			       entryhi & ASID_MASK,
59			       entrylo0 & PAGE_MASK,
60			       (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
61			       (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
62			       (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
63			       (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
64		}
65	}
66	printk("\n");
67
68	write_c0_entryhi(asid);
69}
70
71void dump_tlb_all(void)
72{
73	dump_tlb(0, current_cpu_data.tlbsize - 1);
74}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Dump R3000 TLB for debugging purposes.
 4 *
 5 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
 6 * Copyright (C) 1999 by Silicon Graphics, Inc.
 7 * Copyright (C) 1999 by Harald Koerfgen
 8 */
 9#include <linux/kernel.h>
10#include <linux/mm.h>
11
12#include <asm/mipsregs.h>
13#include <asm/mmu_context.h>
14#include <asm/page.h>
 
15#include <asm/tlbdebug.h>
16
17extern int r3k_have_wired_reg;
18
19void dump_tlb_regs(void)
20{
21	pr_info("Index    : %0x\n", read_c0_index());
22	pr_info("EntryHi  : %0lx\n", read_c0_entryhi());
23	pr_info("EntryLo  : %0lx\n", read_c0_entrylo0());
24	if (r3k_have_wired_reg)
25		pr_info("Wired    : %0x\n", read_c0_wired());
26}
27
28static void dump_tlb(int first, int last)
29{
30	int	i;
31	unsigned int asid;
32	unsigned long entryhi, entrylo0, asid_mask;
33
34	asid_mask = cpu_asid_mask(&current_cpu_data);
35	asid = read_c0_entryhi() & asid_mask;
36
37	for (i = first; i <= last; i++) {
38		write_c0_index(i<<8);
39		__asm__ __volatile__(
40			".set\tnoreorder\n\t"
41			"tlbr\n\t"
42			"nop\n\t"
43			".set\treorder");
44		entryhi	 = read_c0_entryhi();
45		entrylo0 = read_c0_entrylo0();
46
47		/* Unused entries have a virtual address of KSEG0.  */
48		if ((entryhi & PAGE_MASK) != KSEG0 &&
49		    (entrylo0 & R3K_ENTRYLO_G ||
50		     (entryhi & asid_mask) == asid)) {
51			/*
52			 * Only print entries in use
53			 */
54			printk("Index: %2d ", i);
55
56			pr_cont("va=%08lx asid=%08lx"
57				"  [pa=%06lx n=%d d=%d v=%d g=%d]",
58				entryhi & PAGE_MASK,
59				entryhi & asid_mask,
60				entrylo0 & PAGE_MASK,
61				(entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
62				(entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
63				(entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
64				(entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
65		}
66	}
67	printk("\n");
68
69	write_c0_entryhi(asid);
70}
71
72void dump_tlb_all(void)
73{
74	dump_tlb(0, current_cpu_data.tlbsize - 1);
75}