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 20extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */ 21 22void 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 64void dump_tlb_all(void) 65{ 66 dump_tlb(0, current_cpu_data.tlbsize - 1); 67} 68 69void 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 77void 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 99void 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 105void dump_list_process(struct task_struct *t, void *address) 106{ 107 pgd_t *page_dir, *pgd; 108 pud_t *pud; 109 pmd_t *pmd; 110 pte_t *pte, page; 111 unsigned int addr; 112 unsigned long val; 113 114 addr = (unsigned int) address; 115 116 printk("Addr == %08x\n", addr); 117 printk("tasks->mm.pgd == %08x\n", (unsigned int) t->mm->pgd); 118 119 page_dir = pgd_offset(t->mm, 0); 120 printk("page_dir == %08x\n", (unsigned int) page_dir); 121 122 pgd = pgd_offset(t->mm, addr); 123 printk("pgd == %08x, ", (unsigned int) pgd); 124 125 pud = pud_offset(pgd, addr); 126 printk("pud == %08x, ", (unsigned int) pud); 127 128 pmd = pmd_offset(pud, addr); 129 printk("pmd == %08x, ", (unsigned int) pmd); 130 131 pte = pte_offset(pmd, addr); 132 printk("pte == %08x, ", (unsigned int) pte); 133 134 page = *pte; 135 printk("page == %08x\n", (unsigned int) pte_val(page)); 136 137 val = pte_val(page); 138 if (val & _PAGE_PRESENT) printk("present "); 139 if (val & _PAGE_READ) printk("read "); 140 if (val & _PAGE_WRITE) printk("write "); 141 if (val & _PAGE_ACCESSED) printk("accessed "); 142 if (val & _PAGE_MODIFIED) printk("modified "); 143 if (val & _PAGE_GLOBAL) printk("global "); 144 if (val & _PAGE_VALID) printk("valid "); 145 printk("\n"); 146} 147 148void dump_list_current(void *address) 149{ 150 dump_list_process(current, address); 151} 152 153unsigned int vtop(void *address) 154{ 155 pgd_t *pgd; 156 pud_t *pud; 157 pmd_t *pmd; 158 pte_t *pte; 159 unsigned int addr, paddr; 160 161 addr = (unsigned long) address; 162 pgd = pgd_offset(current->mm, addr); 163 pud = pud_offset(pgd, addr); 164 pmd = pmd_offset(pud, addr); 165 pte = pte_offset(pmd, addr); 166 paddr = (KSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK; 167 paddr |= (addr & ~PAGE_MASK); 168 169 return paddr; 170} 171 172void dump16(unsigned long *p) 173{ 174 int i; 175 176 for (i = 0; i < 8; i++) { 177 printk("*%08lx == %08lx, ", (unsigned long)p, *p); 178 p++; 179 printk("*%08lx == %08lx\n", (unsigned long)p, *p); 180 p++; 181 } 182} 183