blob: a878224004e56c31e3d2aa3bdffd98b759f3c746 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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#include <linux/sched.h>
11#include <linux/string.h>
12
13#include <asm/bootinfo.h>
14#include <asm/cachectl.h>
15#include <asm/cpu.h>
16#include <asm/mipsregs.h>
17#include <asm/page.h>
18#include <asm/pgtable.h>
19
20extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */
21
22void dump_tlb(int first, int last)
23{
24 int i;
25 unsigned int asid;
26 unsigned long entryhi, entrylo0;
27
28 asid = read_c0_entryhi() & 0xfc0;
29
30 for (i = first; i <= last; i++) {
31 write_c0_index(i<<8);
32 __asm__ __volatile__(
33 ".set\tnoreorder\n\t"
34 "tlbr\n\t"
35 "nop\n\t"
36 ".set\treorder");
37 entryhi = read_c0_entryhi();
38 entrylo0 = read_c0_entrylo0();
39
40 /* Unused entries have a virtual address of KSEG0. */
41 if ((entryhi & 0xffffe000) != 0x80000000
42 && (entryhi & 0xfc0) == asid) {
43 /*
44 * Only print entries in use
45 */
46 printk("Index: %2d ", i);
47
48 printk("va=%08lx asid=%08lx"
49 " [pa=%06lx n=%d d=%d v=%d g=%d]",
50 (entryhi & 0xffffe000),
51 entryhi & 0xfc0,
52 entrylo0 & PAGE_MASK,
53 (entrylo0 & (1 << 11)) ? 1 : 0,
54 (entrylo0 & (1 << 10)) ? 1 : 0,
55 (entrylo0 & (1 << 9)) ? 1 : 0,
56 (entrylo0 & (1 << 8)) ? 1 : 0);
57 }
58 }
59 printk("\n");
60
61 write_c0_entryhi(asid);
62}
63
64void dump_tlb_all(void)
65{
66 dump_tlb(0, current_cpu_data.tlbsize - 1);
67}
68
69void dump_tlb_wired(void)
70{
71 int wired = r3k_have_wired_reg ? read_c0_wired() : 8;
72
73 printk("Wired: %d", wired);
74 dump_tlb(0, wired - 1);
75}
76
77void dump_tlb_addr(unsigned long addr)
78{
79 unsigned long flags, oldpid;
80 int index;
81
82 local_irq_save(flags);
83 oldpid = read_c0_entryhi() & 0xff;
84 write_c0_entryhi((addr & PAGE_MASK) | oldpid);
85 tlb_probe();
86 index = read_c0_index();
87 write_c0_entryhi(oldpid);
88 local_irq_restore(flags);
89
90 if (index < 0) {
91 printk("No entry for address 0x%08lx in TLB\n", addr);
92 return;
93 }
94
95 printk("Entry %d maps address 0x%08lx\n", index, addr);
96 dump_tlb(index, index);
97}
98
99void dump_tlb_nonwired(void)
100{
101 int wired = r3k_have_wired_reg ? read_c0_wired() : 8;
102 dump_tlb(wired, current_cpu_data.tlbsize - 1);
103}
104
105void dump_list_process(struct task_struct *t, void *address)
106{
107 pgd_t *page_dir, *pgd;
108 pmd_t *pmd;
109 pte_t *pte, page;
110 unsigned int addr;
111 unsigned long val;
112
113 addr = (unsigned int) address;
114
115 printk("Addr == %08x\n", addr);
116 printk("tasks->mm.pgd == %08x\n", (unsigned int) t->mm->pgd);
117
118 page_dir = pgd_offset(t->mm, 0);
119 printk("page_dir == %08x\n", (unsigned int) page_dir);
120
121 pgd = pgd_offset(t->mm, addr);
122 printk("pgd == %08x, ", (unsigned int) pgd);
123
124 pmd = pmd_offset(pgd, addr);
125 printk("pmd == %08x, ", (unsigned int) pmd);
126
127 pte = pte_offset(pmd, addr);
128 printk("pte == %08x, ", (unsigned int) pte);
129
130 page = *pte;
131 printk("page == %08x\n", (unsigned int) pte_val(page));
132
133 val = pte_val(page);
134 if (val & _PAGE_PRESENT) printk("present ");
135 if (val & _PAGE_READ) printk("read ");
136 if (val & _PAGE_WRITE) printk("write ");
137 if (val & _PAGE_ACCESSED) printk("accessed ");
138 if (val & _PAGE_MODIFIED) printk("modified ");
139 if (val & _PAGE_GLOBAL) printk("global ");
140 if (val & _PAGE_VALID) printk("valid ");
141 printk("\n");
142}
143
144void dump_list_current(void *address)
145{
146 dump_list_process(current, address);
147}
148
149unsigned int vtop(void *address)
150{
151 pgd_t *pgd;
152 pmd_t *pmd;
153 pte_t *pte;
154 unsigned int addr, paddr;
155
156 addr = (unsigned long) address;
157 pgd = pgd_offset(current->mm, addr);
158 pmd = pmd_offset(pgd, addr);
159 pte = pte_offset(pmd, addr);
160 paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
161 paddr |= (addr & ~PAGE_MASK);
162
163 return paddr;
164}
165
166void dump16(unsigned long *p)
167{
168 int i;
169
170 for (i = 0; i < 8; i++) {
171 printk("*%08lx == %08lx, ", (unsigned long)p, *p);
172 p++;
173 printk("*%08lx == %08lx\n", (unsigned long)p, *p);
174 p++;
175 }
176}