1/* 2 * Dump R4x00 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 */ 7#include <linux/kernel.h> 8#include <linux/mm.h> 9 10#include <asm/mipsregs.h> 11#include <asm/page.h> 12#include <asm/pgtable.h> 13#include <asm/tlbdebug.h> 14 15static inline const char *msk2str(unsigned int mask) 16{ 17 switch (mask) { 18 case PM_4K: return "4kb"; 19 case PM_16K: return "16kb"; 20 case PM_64K: return "64kb"; 21 case PM_256K: return "256kb"; 22#ifdef CONFIG_CPU_CAVIUM_OCTEON 23 case PM_8K: return "8kb"; 24 case PM_32K: return "32kb"; 25 case PM_128K: return "128kb"; 26 case PM_512K: return "512kb"; 27 case PM_2M: return "2Mb"; 28 case PM_8M: return "8Mb"; 29 case PM_32M: return "32Mb"; 30#endif 31#ifndef CONFIG_CPU_VR41XX 32 case PM_1M: return "1Mb"; 33 case PM_4M: return "4Mb"; 34 case PM_16M: return "16Mb"; 35 case PM_64M: return "64Mb"; 36 case PM_256M: return "256Mb"; 37 case PM_1G: return "1Gb"; 38#endif 39 } 40 return ""; 41} 42 43#define BARRIER() \ 44 __asm__ __volatile__( \ 45 ".set\tnoreorder\n\t" \ 46 "nop;nop;nop;nop;nop;nop;nop\n\t" \ 47 ".set\treorder"); 48 49static void dump_tlb(int first, int last) 50{ 51 unsigned long s_entryhi, entryhi, asid; 52 unsigned long long entrylo0, entrylo1; 53 unsigned int s_index, pagemask, c0, c1, i; 54 55 s_entryhi = read_c0_entryhi(); 56 s_index = read_c0_index(); 57 asid = s_entryhi & 0xff; 58 59 for (i = first; i <= last; i++) { 60 write_c0_index(i); 61 BARRIER(); 62 tlb_read(); 63 BARRIER(); 64 pagemask = read_c0_pagemask(); 65 entryhi = read_c0_entryhi(); 66 entrylo0 = read_c0_entrylo0(); 67 entrylo1 = read_c0_entrylo1(); 68 69 /* Unused entries have a virtual address of CKSEG0. */ 70 if ((entryhi & ~0x1ffffUL) != CKSEG0 71 && (entryhi & 0xff) == asid) { 72#ifdef CONFIG_32BIT 73 int width = 8; 74#else 75 int width = 11; 76#endif 77 /* 78 * Only print entries in use 79 */ 80 printk("Index: %2d pgmask=%s ", i, msk2str(pagemask)); 81 82 c0 = (entrylo0 >> 3) & 7; 83 c1 = (entrylo1 >> 3) & 7; 84 85 printk("va=%0*lx asid=%02lx\n", 86 width, (entryhi & ~0x1fffUL), 87 entryhi & 0xff); 88 printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ", 89 width, 90 (entrylo0 << 6) & PAGE_MASK, c0, 91 (entrylo0 & 4) ? 1 : 0, 92 (entrylo0 & 2) ? 1 : 0, 93 (entrylo0 & 1) ? 1 : 0); 94 printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n", 95 width, 96 (entrylo1 << 6) & PAGE_MASK, c1, 97 (entrylo1 & 4) ? 1 : 0, 98 (entrylo1 & 2) ? 1 : 0, 99 (entrylo1 & 1) ? 1 : 0); 100 } 101 } 102 printk("\n"); 103 104 write_c0_entryhi(s_entryhi); 105 write_c0_index(s_index); 106} 107 108void dump_tlb_all(void) 109{ 110 dump_tlb(0, current_cpu_data.tlbsize - 1); 111} 112