Linux 2.6.17.7
[linux/fpc-iii.git] / arch / mips / lib-64 / dump_tlb.c
blob11a5f015f04005eaf1ddbe9f70c3c649f6c4e0ed
1 /*
2 * Dump R4x00 TLB for debugging purposes.
4 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
5 * Copyright (C) 1999 by Silicon Graphics, Inc.
6 */
7 #include <linux/config.h>
8 #include <linux/kernel.h>
9 #include <linux/mm.h>
10 #include <linux/sched.h>
11 #include <linux/string.h>
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>
20 static inline const char *msk2str(unsigned int mask)
22 switch (mask) {
23 case PM_4K: return "4kb";
24 case PM_16K: return "16kb";
25 case PM_64K: return "64kb";
26 case PM_256K: return "256kb";
27 #ifndef CONFIG_CPU_VR41XX
28 case PM_1M: return "1Mb";
29 case PM_4M: return "4Mb";
30 case PM_16M: return "16Mb";
31 case PM_64M: return "64Mb";
32 case PM_256M: return "256Mb";
33 #endif
36 return "unknown";
39 #define BARRIER() \
40 __asm__ __volatile__( \
41 ".set\tnoreorder\n\t" \
42 "nop;nop;nop;nop;nop;nop;nop\n\t" \
43 ".set\treorder");
45 void dump_tlb(int first, int last)
47 unsigned long s_entryhi, entryhi, entrylo0, entrylo1, asid;
48 unsigned int s_index, pagemask, c0, c1, i;
50 s_entryhi = read_c0_entryhi();
51 s_index = read_c0_index();
52 asid = s_entryhi & 0xff;
54 for (i = first; i <= last; i++) {
55 write_c0_index(i);
56 BARRIER();
57 tlb_read();
58 BARRIER();
59 pagemask = read_c0_pagemask();
60 entryhi = read_c0_entryhi();
61 entrylo0 = read_c0_entrylo0();
62 entrylo1 = read_c0_entrylo1();
64 /* Unused entries have a virtual address of CKSEG0. */
65 if ((entryhi & ~0x1ffffUL) != CKSEG0
66 && (entryhi & 0xff) == asid) {
68 * Only print entries in use
70 printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
72 c0 = (entrylo0 >> 3) & 7;
73 c1 = (entrylo1 >> 3) & 7;
75 printk("va=%011lx asid=%02lx\n",
76 (entryhi & ~0x1fffUL),
77 entryhi & 0xff);
78 printk("\t[pa=%011lx c=%d d=%d v=%d g=%ld] ",
79 (entrylo0 << 6) & PAGE_MASK, c0,
80 (entrylo0 & 4) ? 1 : 0,
81 (entrylo0 & 2) ? 1 : 0,
82 (entrylo0 & 1));
83 printk("[pa=%011lx c=%d d=%d v=%d g=%ld]\n",
84 (entrylo1 << 6) & PAGE_MASK, c1,
85 (entrylo1 & 4) ? 1 : 0,
86 (entrylo1 & 2) ? 1 : 0,
87 (entrylo1 & 1));
90 printk("\n");
92 write_c0_entryhi(s_entryhi);
93 write_c0_index(s_index);
96 void dump_tlb_all(void)
98 dump_tlb(0, current_cpu_data.tlbsize - 1);
101 void dump_tlb_wired(void)
103 int wired;
105 wired = read_c0_wired();
106 printk("Wired: %d", wired);
107 dump_tlb(0, read_c0_wired());
110 void dump_tlb_addr(unsigned long addr)
112 unsigned int flags, oldpid;
113 int index;
115 local_irq_save(flags);
116 oldpid = read_c0_entryhi() & 0xff;
117 BARRIER();
118 write_c0_entryhi((addr & PAGE_MASK) | oldpid);
119 BARRIER();
120 tlb_probe();
121 BARRIER();
122 index = read_c0_index();
123 write_c0_entryhi(oldpid);
124 local_irq_restore(flags);
126 if (index < 0) {
127 printk("No entry for address 0x%08lx in TLB\n", addr);
128 return;
131 printk("Entry %d maps address 0x%08lx\n", index, addr);
132 dump_tlb(index, index);
135 void dump_tlb_nonwired(void)
137 dump_tlb(read_c0_wired(), current_cpu_data.tlbsize - 1);
140 void dump_list_process(struct task_struct *t, void *address)
142 pgd_t *page_dir, *pgd;
143 pud_t *pud;
144 pmd_t *pmd;
145 pte_t *pte, page;
146 unsigned long addr, val;
148 addr = (unsigned long) address;
150 printk("Addr == %08lx\n", addr);
151 printk("tasks->mm.pgd == %08lx\n", (unsigned long) t->mm->pgd);
153 page_dir = pgd_offset(t->mm, 0);
154 printk("page_dir == %016lx\n", (unsigned long) page_dir);
156 pgd = pgd_offset(t->mm, addr);
157 printk("pgd == %016lx\n", (unsigned long) pgd);
159 pud = pud_offset(pgd, addr);
160 printk("pud == %016lx\n", (unsigned long) pud);
162 pmd = pmd_offset(pud, addr);
163 printk("pmd == %016lx\n", (unsigned long) pmd);
165 pte = pte_offset(pmd, addr);
166 printk("pte == %016lx\n", (unsigned long) pte);
168 page = *pte;
169 printk("page == %08lx\n", pte_val(page));
171 val = pte_val(page);
172 if (val & _PAGE_PRESENT) printk("present ");
173 if (val & _PAGE_READ) printk("read ");
174 if (val & _PAGE_WRITE) printk("write ");
175 if (val & _PAGE_ACCESSED) printk("accessed ");
176 if (val & _PAGE_MODIFIED) printk("modified ");
177 if (val & _PAGE_R4KBUG) printk("r4kbug ");
178 if (val & _PAGE_GLOBAL) printk("global ");
179 if (val & _PAGE_VALID) printk("valid ");
180 printk("\n");
183 void dump_list_current(void *address)
185 dump_list_process(current, address);
188 unsigned int vtop(void *address)
190 pgd_t *pgd;
191 pud_t *pud;
192 pmd_t *pmd;
193 pte_t *pte;
194 unsigned int addr, paddr;
196 addr = (unsigned long) address;
197 pgd = pgd_offset(current->mm, addr);
198 pud = pud_offset(pgd, addr);
199 pmd = pmd_offset(pud, addr);
200 pte = pte_offset(pmd, addr);
201 paddr = (CKSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
202 paddr |= (addr & ~PAGE_MASK);
204 return paddr;
207 void dump16(unsigned long *p)
209 int i;
211 for (i = 0; i < 8; i++) {
212 printk("*%08lx == %08lx, ", (unsigned long)p, *p);
213 p++;
214 printk("*%08lx == %08lx\n", (unsigned long)p, *p);
215 p++;