LXR linux-bk/arch/mips/lib/r3k_dump

   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/mipsregs.h>
  16#include <asm/page.h>
  17#include <asm/pgtable.h>
  18
  19#define mips_tlb_entries 64
  20
  21void
  22dump_tlb(int first, int last)
  23{
  24        int     i;
  25        unsigned int asid;
  26        unsigned long entryhi, entrylo0;
  27
  28        asid = get_entryhi() & 0xfc0;
  29
  30        for(i=first;i<=last;i++)
  31        {
  32                write_32bit_cp0_register(CP0_INDEX, i<<8);
  33                __asm__ __volatile__(
  34                        ".set\tnoreorder\n\t"
  35                        "tlbr\n\t"
  36                        "nop\n\t"
  37                        ".set\treorder");
  38                entryhi  = read_32bit_cp0_register(CP0_ENTRYHI);
  39                entrylo0 = read_32bit_cp0_register(CP0_ENTRYLO0);
  40
  41                /* Unused entries have a virtual address of KSEG0.  */
  42                if ((entryhi & 0xffffe000) != 0x80000000
  43                    && (entryhi & 0xfc0) == asid) {
  44                        /*
  45                         * Only print entries in use
  46                         */
  47                        printk("Index: %2d ", i);
  48
  49                        printk("va=%08lx asid=%08lx"
  50                               "  [pa=%06lx n=%d d=%d v=%d g=%d]",
  51                               (entryhi & 0xffffe000),
  52                               entryhi & 0xfc0,
  53                               entrylo0 & PAGE_MASK,
  54                               (entrylo0 & (1 << 11)) ? 1 : 0,
  55                               (entrylo0 & (1 << 10)) ? 1 : 0,
  56                               (entrylo0 & (1 << 9)) ? 1 : 0,
  57                               (entrylo0 & (1 << 8)) ? 1 : 0);
  58                }
  59        }
  60        printk("\n");
  61
  62        set_entryhi(asid);
  63}
  64
  65void
  66dump_tlb_all(void)
  67{
  68        dump_tlb(0, mips_tlb_entries - 1);
  69}
  70
  71void
  72dump_tlb_wired(void)
  73{
  74        int     wired = 7;
  75
  76        printk("Wired: %d", wired);
  77        dump_tlb(0, read_32bit_cp0_register(CP0_WIRED));
  78}
  79
  80void
  81dump_tlb_addr(unsigned long addr)
  82{
  83        unsigned int flags, oldpid;
  84        int index;
  85
  86        local_irq_save(flags);
  87        oldpid = get_entryhi() & 0xff;
  88        set_entryhi((addr & PAGE_MASK) | oldpid);
  89        tlb_probe();
  90        index = get_index();
  91        set_entryhi(oldpid);
  92        local_irq_restore(flags);
  93
  94        if (index < 0) {
  95                printk("No entry for address 0x%08lx in TLB\n", addr);
  96                return;
  97        }
  98
  99        printk("Entry %d maps address 0x%08lx\n", index, addr);
 100        dump_tlb(index, index);
 101}
 102
 103void
 104dump_tlb_nonwired(void)
 105{
 106        dump_tlb(8, mips_tlb_entries - 1);
 107}
 108
 109void
 110dump_list_process(struct task_struct *t, void *address)
 111{
 112        pgd_t   *page_dir, *pgd;
 113        pmd_t   *pmd;
 114        pte_t   *pte, page;
 115        unsigned int addr;
 116        unsigned long val;
 117
 118        addr = (unsigned int) address;
 119
 120        printk("Addr                 == %08x\n", addr);
 121        printk("tasks->mm.pgd        == %08x\n", (unsigned int) t->mm->pgd);
 122
 123        page_dir = pgd_offset(t->mm, 0);
 124        printk("page_dir == %08x\n", (unsigned int) page_dir);
 125
 126        pgd = pgd_offset(t->mm, addr);
 127        printk("pgd == %08x, ", (unsigned int) pgd);
 128
 129        pmd = pmd_offset(pgd, addr);
 130        printk("pmd == %08x, ", (unsigned int) pmd);
 131
 132        pte = pte_offset(pmd, addr);
 133        printk("pte == %08x, ", (unsigned int) pte);
 134
 135        page = *pte;
 136        printk("page == %08x\n", (unsigned int) pte_val(page));
 137
 138        val = pte_val(page);
 139        if (val & _PAGE_PRESENT) printk("present ");
 140        if (val & _PAGE_READ) printk("read ");
 141        if (val & _PAGE_WRITE) printk("write ");
 142        if (val & _PAGE_ACCESSED) printk("accessed ");
 143        if (val & _PAGE_MODIFIED) printk("modified ");
 144        if (val & _PAGE_GLOBAL) printk("global ");
 145        if (val & _PAGE_VALID) printk("valid ");
 146        printk("\n");
 147}
 148
 149void
 150dump_list_current(void *address)
 151{
 152        dump_list_process(current, address);
 153}
 154
 155unsigned int
 156vtop(void *address)
 157{
 158        pgd_t   *pgd;
 159        pmd_t   *pmd;
 160        pte_t   *pte;
 161        unsigned int addr, paddr;
 162
 163        addr = (unsigned long) address;
 164        pgd = pgd_offset(current->mm, addr);
 165        pmd = pmd_offset(pgd, addr);
 166        pte = pte_offset(pmd, addr);
 167        paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
 168        paddr |= (addr & ~PAGE_MASK);
 169
 170        return paddr;
 171}
 172
 173void
 174dump16(unsigned long *p)
 175{
 176        int i;
 177
 178        for(i=0;i<8;i++)
 179        {
 180                printk("*%08lx == %08lx, ",
 181                       (unsigned long)p, (unsigned long)*p++);
 182                printk("*%08lx == %08lx\n",
 183                       (unsigned long)p, (unsigned long)*p++);
 184        }
 185}
 186