Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | #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 | |
| 20 | extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */ |
| 21 | |
| 22 | void 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 | |
| 64 | void dump_tlb_all(void) |
| 65 | { |
| 66 | dump_tlb(0, current_cpu_data.tlbsize - 1); |
| 67 | } |
| 68 | |
| 69 | void 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 | |
| 77 | void 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 | |
| 99 | void 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 | |
| 105 | void 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 | |
| 144 | void dump_list_current(void *address) |
| 145 | { |
| 146 | dump_list_process(current, address); |
| 147 | } |
| 148 | |
| 149 | unsigned 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 | |
| 166 | void 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 | } |