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 15 static 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 49 static 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, s_pagemask, pagemask, c0, c1, i; 54 55 s_pagemask = read_c0_pagemask(); 56 s_entryhi = read_c0_entryhi(); 57 s_index = read_c0_index(); 58 asid = s_entryhi & 0xff; 59 60 for (i = first; i <= last; i++) { 61 write_c0_index(i); 62 BARRIER(); 63 tlb_read(); 64 BARRIER(); 65 pagemask = read_c0_pagemask(); 66 entryhi = read_c0_entryhi(); 67 entrylo0 = read_c0_entrylo0(); 68 entrylo1 = read_c0_entrylo1(); 69 70 /* Unused entries have a virtual address of CKSEG0. */ 71 if ((entryhi & ~0x1ffffUL) != CKSEG0 72 && (entryhi & 0xff) == asid) { 73 #ifdef CONFIG_32BIT 74 int width = 8; 75 #else 76 int width = 11; 77 #endif 78 /* 79 * Only print entries in use 80 */ 81 printk("Index: %2d pgmask=%s ", i, msk2str(pagemask)); 82 83 c0 = (entrylo0 >> 3) & 7; 84 c1 = (entrylo1 >> 3) & 7; 85 86 printk("va=%0*lx asid=%02lx\n", 87 width, (entryhi & ~0x1fffUL), 88 entryhi & 0xff); 89 printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ", 90 width, 91 (entrylo0 << 6) & PAGE_MASK, c0, 92 (entrylo0 & 4) ? 1 : 0, 93 (entrylo0 & 2) ? 1 : 0, 94 (entrylo0 & 1) ? 1 : 0); 95 printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n", 96 width, 97 (entrylo1 << 6) & PAGE_MASK, c1, 98 (entrylo1 & 4) ? 1 : 0, 99 (entrylo1 & 2) ? 1 : 0, 100 (entrylo1 & 1) ? 1 : 0); 101 } 102 } 103 printk("\n"); 104 105 write_c0_entryhi(s_entryhi); 106 write_c0_index(s_index); 107 write_c0_pagemask(s_pagemask); 108 } 109 110 void dump_tlb_all(void) 111 { 112 dump_tlb(0, current_cpu_data.tlbsize - 1); 113 } 114