aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/lib/r3k_dump_tlb.c
blob: 4f2cb74f0766131d43311951fc5bbe39f262fd32 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*
 * 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 <linux/sched.h>
#include <linux/string.h>

#include <asm/bootinfo.h>
#include <asm/cachectl.h>
#include <asm/cpu.h>
#include <asm/mipsregs.h>
#include <asm/page.h>
#include <asm/pgtable.h>

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

void dump_tlb(int first, int last)
{
	int	i;
	unsigned int asid;
	unsigned long entryhi, entrylo0;

	asid = read_c0_entryhi() & 0xfc0;

	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 & 0xffffe000) != 0x80000000
		    && (entryhi & 0xfc0) == 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 & 0xffffe000),
			       entryhi & 0xfc0,
			       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);
}

void dump_tlb_wired(void)
{
	int wired = r3k_have_wired_reg ? read_c0_wired() : 8;

	printk("Wired: %d", wired);
	dump_tlb(0, wired - 1);
}

void dump_tlb_addr(unsigned long addr)
{
	unsigned long flags, oldpid;
	int index;

	local_irq_save(flags);
	oldpid = read_c0_entryhi() & 0xff;
	write_c0_entryhi((addr & PAGE_MASK) | oldpid);
	tlb_probe();
	index = read_c0_index();
	write_c0_entryhi(oldpid);
	local_irq_restore(flags);

	if (index < 0) {
		printk("No entry for address 0x%08lx in TLB\n", addr);
		return;
	}

	printk("Entry %d maps address 0x%08lx\n", index, addr);
	dump_tlb(index, index);
}

void dump_tlb_nonwired(void)
{
	int wired = r3k_have_wired_reg ? read_c0_wired() : 8;
	dump_tlb(wired, current_cpu_data.tlbsize - 1);
}

void dump_list_process(struct task_struct *t, void *address)
{
	pgd_t	*page_dir, *pgd;
	pud_t	*pud;
	pmd_t	*pmd;
	pte_t	*pte, page;
	unsigned int addr;
	unsigned long val;

	addr = (unsigned int) address;

	printk("Addr                 == %08x\n", addr);
	printk("tasks->mm.pgd        == %08x\n", (unsigned int) t->mm->pgd);

	page_dir = pgd_offset(t->mm, 0);
	printk("page_dir == %08x\n", (unsigned int) page_dir);

	pgd = pgd_offset(t->mm, addr);
	printk("pgd == %08x, ", (unsigned int) pgd);

	pud = pud_offset(pgd, addr);
	printk("pud == %08x, ", (unsigned int) pud);

	pmd = pmd_offset(pud, addr);
	printk("pmd == %08x, ", (unsigned int) pmd);

	pte = pte_offset(pmd, addr);
	printk("pte == %08x, ", (unsigned int) pte);

	page = *pte;
	printk("page == %08x\n", (unsigned int) pte_val(page));

	val = pte_val(page);
	if (val & _PAGE_PRESENT) printk("present ");
	if (val & _PAGE_READ) printk("read ");
	if (val & _PAGE_WRITE) printk("write ");
	if (val & _PAGE_ACCESSED) printk("accessed ");
	if (val & _PAGE_MODIFIED) printk("modified ");
	if (val & _PAGE_GLOBAL) printk("global ");
	if (val & _PAGE_VALID) printk("valid ");
	printk("\n");
}

void dump_list_current(void *address)
{
	dump_list_process(current, address);
}

unsigned int vtop(void *address)
{
	pgd_t	*pgd;
	pud_t	*pud;
	pmd_t	*pmd;
	pte_t	*pte;
	unsigned int addr, paddr;

	addr = (unsigned long) address;
	pgd = pgd_offset(current->mm, addr);
	pud = pud_offset(pgd, addr);
	pmd = pmd_offset(pud, addr);
	pte = pte_offset(pmd, addr);
	paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
	paddr |= (addr & ~PAGE_MASK);

	return paddr;
}

void dump16(unsigned long *p)
{
	int i;

	for (i = 0; i < 8; i++) {
		printk("*%08lx == %08lx, ", (unsigned long)p, *p);
		p++;
		printk("*%08lx == %08lx\n", (unsigned long)p, *p);
		p++;
	}
}