Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Dump R4x00 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 | */ | |
1da177e4 LT |
7 | #include <linux/kernel.h> |
8 | #include <linux/mm.h> | |
9 | #include <linux/sched.h> | |
10 | #include <linux/string.h> | |
11 | ||
12 | #include <asm/bootinfo.h> | |
13 | #include <asm/cachectl.h> | |
14 | #include <asm/cpu.h> | |
15 | #include <asm/mipsregs.h> | |
16 | #include <asm/page.h> | |
17 | #include <asm/pgtable.h> | |
18 | ||
19 | static inline const char *msk2str(unsigned int mask) | |
20 | { | |
21 | switch (mask) { | |
d2f755e0 RB |
22 | case PM_4K: |
23 | return "4kb"; | |
24 | case PM_16K: | |
25 | return "16kb"; | |
26 | case PM_64K: | |
27 | return "64kb"; | |
28 | case PM_256K: | |
29 | return "256kb"; | |
1da177e4 | 30 | #ifndef CONFIG_CPU_VR41XX |
d2f755e0 RB |
31 | case PM_1M: |
32 | return "1Mb"; | |
33 | case PM_4M: | |
34 | return "4Mb"; | |
35 | case PM_16M: | |
36 | return "16Mb"; | |
37 | case PM_64M: | |
38 | return "64Mb"; | |
39 | case PM_256M: | |
40 | return "256Mb"; | |
1da177e4 LT |
41 | #endif |
42 | } | |
43 | ||
44 | return "unknown"; | |
45 | } | |
46 | ||
47 | #define BARRIER() \ | |
48 | __asm__ __volatile__( \ | |
49 | ".set\tnoreorder\n\t" \ | |
50 | "nop;nop;nop;nop;nop;nop;nop\n\t" \ | |
51 | ".set\treorder"); | |
52 | ||
53 | void dump_tlb(int first, int last) | |
54 | { | |
55 | unsigned int pagemask, c0, c1, asid; | |
56 | unsigned long long entrylo0, entrylo1; | |
57 | unsigned long entryhi; | |
d2f755e0 | 58 | int i; |
1da177e4 LT |
59 | |
60 | asid = read_c0_entryhi() & 0xff; | |
61 | ||
62 | printk("\n"); | |
63 | for (i = first; i <= last; i++) { | |
64 | write_c0_index(i); | |
65 | BARRIER(); | |
66 | tlb_read(); | |
67 | BARRIER(); | |
68 | pagemask = read_c0_pagemask(); | |
d2f755e0 | 69 | entryhi = read_c0_entryhi(); |
1da177e4 LT |
70 | entrylo0 = read_c0_entrylo0(); |
71 | entrylo1 = read_c0_entrylo1(); | |
72 | ||
73 | /* Unused entries have a virtual address in KSEG0. */ | |
74 | if ((entryhi & 0xf0000000) != 0x80000000 | |
75 | && (entryhi & 0xff) == asid) { | |
76 | /* | |
77 | * Only print entries in use | |
78 | */ | |
79 | printk("Index: %2d pgmask=%s ", i, msk2str(pagemask)); | |
80 | ||
81 | c0 = (entrylo0 >> 3) & 7; | |
82 | c1 = (entrylo1 >> 3) & 7; | |
83 | ||
84 | printk("va=%08lx asid=%02lx\n", | |
85 | (entryhi & 0xffffe000), (entryhi & 0xff)); | |
86 | printk("\t\t\t[pa=%08Lx c=%d d=%d v=%d g=%Ld]\n", | |
87 | (entrylo0 << 6) & PAGE_MASK, c0, | |
88 | (entrylo0 & 4) ? 1 : 0, | |
d2f755e0 | 89 | (entrylo0 & 2) ? 1 : 0, (entrylo0 & 1)); |
1da177e4 LT |
90 | printk("\t\t\t[pa=%08Lx c=%d d=%d v=%d g=%Ld]\n", |
91 | (entrylo1 << 6) & PAGE_MASK, c1, | |
92 | (entrylo1 & 4) ? 1 : 0, | |
d2f755e0 | 93 | (entrylo1 & 2) ? 1 : 0, (entrylo1 & 1)); |
1da177e4 LT |
94 | printk("\n"); |
95 | } | |
96 | } | |
97 | ||
98 | write_c0_entryhi(asid); | |
99 | } | |
100 | ||
101 | void dump_tlb_all(void) | |
102 | { | |
103 | dump_tlb(0, current_cpu_data.tlbsize - 1); | |
104 | } | |
105 | ||
106 | void dump_tlb_wired(void) | |
107 | { | |
d2f755e0 | 108 | int wired; |
1da177e4 LT |
109 | |
110 | wired = read_c0_wired(); | |
111 | printk("Wired: %d", wired); | |
112 | dump_tlb(0, read_c0_wired()); | |
113 | } | |
114 | ||
115 | void dump_tlb_addr(unsigned long addr) | |
116 | { | |
117 | unsigned int flags, oldpid; | |
118 | int index; | |
119 | ||
120 | local_irq_save(flags); | |
121 | oldpid = read_c0_entryhi() & 0xff; | |
122 | BARRIER(); | |
123 | write_c0_entryhi((addr & PAGE_MASK) | oldpid); | |
124 | BARRIER(); | |
125 | tlb_probe(); | |
126 | BARRIER(); | |
127 | index = read_c0_index(); | |
128 | write_c0_entryhi(oldpid); | |
129 | local_irq_restore(flags); | |
130 | ||
131 | if (index < 0) { | |
132 | printk("No entry for address 0x%08lx in TLB\n", addr); | |
133 | return; | |
134 | } | |
135 | ||
136 | printk("Entry %d maps address 0x%08lx\n", index, addr); | |
137 | dump_tlb(index, index); | |
138 | } | |
139 | ||
140 | void dump_tlb_nonwired(void) | |
141 | { | |
142 | dump_tlb(read_c0_wired(), current_cpu_data.tlbsize - 1); | |
143 | } | |
144 | ||
145 | void dump_list_process(struct task_struct *t, void *address) | |
146 | { | |
d2f755e0 RB |
147 | pgd_t *page_dir, *pgd; |
148 | pud_t *pud; | |
149 | pmd_t *pmd; | |
150 | pte_t *pte, page; | |
1da177e4 LT |
151 | unsigned long addr, val; |
152 | ||
153 | addr = (unsigned long) address; | |
154 | ||
155 | printk("Addr == %08lx\n", addr); | |
156 | printk("task == %8p\n", t); | |
157 | printk("task->mm == %8p\n", t->mm); | |
158 | //printk("tasks->mm.pgd == %08x\n", (unsigned int) t->mm->pgd); | |
159 | ||
d1e30a63 | 160 | if (addr > KSEG0) { |
1da177e4 | 161 | page_dir = pgd_offset_k(0); |
1da177e4 | 162 | pgd = pgd_offset_k(addr); |
d1e30a63 AN |
163 | } else if (t->mm) { |
164 | page_dir = pgd_offset(t->mm, 0); | |
1da177e4 | 165 | pgd = pgd_offset(t->mm, addr); |
d1e30a63 AN |
166 | } else { |
167 | printk("Current thread has no mm\n"); | |
168 | return; | |
169 | } | |
170 | printk("page_dir == %08x\n", (unsigned int) page_dir); | |
171 | printk("pgd == %08x, ", (unsigned int) pgd); | |
172 | pud = pud_offset(pgd, addr); | |
173 | printk("pud == %08x, ", (unsigned int) pud); | |
1da177e4 | 174 | |
d1e30a63 AN |
175 | pmd = pmd_offset(pud, addr); |
176 | printk("pmd == %08x, ", (unsigned int) pmd); | |
c6e8b587 | 177 | |
d1e30a63 AN |
178 | pte = pte_offset(pmd, addr); |
179 | printk("pte == %08x, ", (unsigned int) pte); | |
1da177e4 LT |
180 | |
181 | page = *pte; | |
182 | #ifdef CONFIG_64BIT_PHYS_ADDR | |
183 | printk("page == %08Lx\n", pte_val(page)); | |
184 | #else | |
185 | printk("page == %08lx\n", pte_val(page)); | |
186 | #endif | |
187 | ||
188 | val = pte_val(page); | |
d2f755e0 RB |
189 | if (val & _PAGE_PRESENT) |
190 | printk("present "); | |
191 | if (val & _PAGE_READ) | |
192 | printk("read "); | |
193 | if (val & _PAGE_WRITE) | |
194 | printk("write "); | |
195 | if (val & _PAGE_ACCESSED) | |
196 | printk("accessed "); | |
197 | if (val & _PAGE_MODIFIED) | |
198 | printk("modified "); | |
199 | if (val & _PAGE_R4KBUG) | |
200 | printk("r4kbug "); | |
201 | if (val & _PAGE_GLOBAL) | |
202 | printk("global "); | |
203 | if (val & _PAGE_VALID) | |
204 | printk("valid "); | |
1da177e4 LT |
205 | printk("\n"); |
206 | } | |
207 | ||
208 | void dump_list_current(void *address) | |
209 | { | |
210 | dump_list_process(current, address); | |
211 | } | |
212 | ||
213 | unsigned int vtop(void *address) | |
214 | { | |
d2f755e0 RB |
215 | pgd_t *pgd; |
216 | pud_t *pud; | |
217 | pmd_t *pmd; | |
218 | pte_t *pte; | |
1da177e4 LT |
219 | unsigned int addr, paddr; |
220 | ||
221 | addr = (unsigned long) address; | |
222 | pgd = pgd_offset(current->mm, addr); | |
c6e8b587 RB |
223 | pud = pud_offset(pgd, addr); |
224 | pmd = pmd_offset(pud, addr); | |
1da177e4 LT |
225 | pte = pte_offset(pmd, addr); |
226 | paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK; | |
227 | paddr |= (addr & ~PAGE_MASK); | |
228 | ||
229 | return paddr; | |
230 | } | |
231 | ||
232 | void dump16(unsigned long *p) | |
233 | { | |
234 | int i; | |
235 | ||
236 | for (i = 0; i < 8; i++) { | |
d2f755e0 | 237 | printk("*%08lx == %08lx, ", (unsigned long) p, *p); |
1da177e4 | 238 | p++; |
d2f755e0 | 239 | printk("*%08lx == %08lx\n", (unsigned long) p, *p); |
1da177e4 LT |
240 | p++; |
241 | } | |
242 | } |