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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | /* * Dump R4x00 TLB for debugging purposes. * * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle. * Copyright (C) 1999 by Silicon Graphics, Inc. */ #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/mipsregs.h> #include <asm/page.h> #include <asm/pgtable.h> #define mips_tlb_entries 64 void dump_tlb(int first, int last) { unsigned long s_entryhi, entryhi, entrylo0, entrylo1, asid; unsigned int s_index, pagemask, c0, c1, i; s_entryhi = get_entryhi(); s_index = get_index(); asid = s_entryhi & 0xff; for (i = first; i <= last; i++) { write_32bit_cp0_register(CP0_INDEX, i); __asm__ __volatile__( ".set\tnoreorder\n\t" "nop;nop;nop;nop\n\t" "tlbr\n\t" "nop;nop;nop;nop\n\t" ".set\treorder"); pagemask = read_32bit_cp0_register(CP0_PAGEMASK); entryhi = get_entryhi(); entrylo0 = get_entrylo0(); entrylo1 = get_entrylo1(); /* Unused entries have a virtual address of CKSEG0. */ if ((entryhi & ~0x1ffffUL) != CKSEG0 && (entryhi & 0xff) == asid) { /* * Only print entries in use */ printk("Index: %2d pgmask=%08x ", i, pagemask); c0 = (entrylo0 >> 3) & 7; c1 = (entrylo1 >> 3) & 7; printk("va=%08lx asid=%02lx" " [pa=%06lx c=%d d=%d v=%d g=%ld]" " [pa=%06lx c=%d d=%d v=%d g=%ld]\n", (entryhi & ~0x1fffUL), entryhi & 0xff, entrylo0 & PAGE_MASK, c0, (entrylo0 & 4) ? 1 : 0, (entrylo0 & 2) ? 1 : 0, (entrylo0 & 1), entrylo1 & PAGE_MASK, c1, (entrylo1 & 4) ? 1 : 0, (entrylo1 & 2) ? 1 : 0, (entrylo1 & 1)); } } printk("\n"); set_entryhi(s_entryhi); set_index(s_index); } void dump_tlb_all(void) { dump_tlb(0, mips_tlb_entries - 1); } void dump_tlb_wired(void) { int wired; wired = read_32bit_cp0_register(CP0_WIRED); printk("Wired: %d", wired); dump_tlb(0, read_32bit_cp0_register(CP0_WIRED)); } #define BARRIER \ __asm__ __volatile__( \ ".set\tnoreorder\n\t" \ "nop;nop;nop;nop;nop;nop;nop\n\t" \ ".set\treorder"); void dump_tlb_addr(unsigned long addr) { unsigned int flags, oldpid; int index; __save_and_cli(flags); oldpid = get_entryhi() & 0xff; BARRIER; set_entryhi((addr & PAGE_MASK) | oldpid); BARRIER; tlb_probe(); BARRIER; index = get_index(); set_entryhi(oldpid); __restore_flags(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) { dump_tlb(read_32bit_cp0_register(CP0_WIRED), mips_tlb_entries - 1); } void dump_list_process(struct task_struct *t, void *address) { pgd_t *page_dir, *pgd; pmd_t *pmd; pte_t *pte, page; unsigned long addr; unsigned long val; addr = (unsigned long) address; printk("Addr == %08lx\n", addr); printk("tasks->mm.pgd == %08lx\n", (unsigned long) t->mm->pgd); page_dir = pgd_offset(t->mm, 0); printk("page_dir == %08lx\n", (unsigned long) page_dir); pgd = pgd_offset(t->mm, addr); printk("pgd == %08lx, ", (unsigned long) pgd); pmd = pmd_offset(pgd, addr); printk("pmd == %08lx, ", (unsigned long) pmd); pte = pte_offset(pmd, addr); printk("pte == %08lx, ", (unsigned long) pte); page = *pte; printk("page == %08lx\n", (unsigned long) 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_R4KBUG) printk("r4kbug "); 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; pmd_t *pmd; pte_t *pte; unsigned int addr, paddr; addr = (unsigned long) address; pgd = pgd_offset(current->mm, addr); pmd = pmd_offset(pgd, 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, (unsigned long)*p); p++; printk("*%08lx == %08lx\n", (unsigned long)p, (unsigned long)*p); p++; } } |