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 #ifndef CONFIG_CPU_VR41XX 23 case PM_1M: return "1Mb"; 24 case PM_4M: return "4Mb"; 25 case PM_16M: return "16Mb"; 26 case PM_64M: return "64Mb"; 27 case PM_256M: return "256Mb"; 28 #endif 29 } 30 return ""; 31 } 32 33 #define BARRIER() \ 34 __asm__ __volatile__( \ 35 ".set\tnoreorder\n\t" \ 36 "nop;nop;nop;nop;nop;nop;nop\n\t" \ 37 ".set\treorder"); 38 39 static void dump_tlb(int first, int last) 40 { 41 unsigned long s_entryhi, entryhi, asid; 42 unsigned long long entrylo0, entrylo1; 43 unsigned int s_index, pagemask, c0, c1, i; 44 45 s_entryhi = read_c0_entryhi(); 46 s_index = read_c0_index(); 47 asid = s_entryhi & 0xff; 48 49 for (i = first; i <= last; i++) { 50 write_c0_index(i); 51 BARRIER(); 52 tlb_read(); 53 BARRIER(); 54 pagemask = read_c0_pagemask(); 55 entryhi = read_c0_entryhi(); 56 entrylo0 = read_c0_entrylo0(); 57 entrylo1 = read_c0_entrylo1(); 58 59 /* Unused entries have a virtual address of CKSEG0. */ 60 if ((entryhi & ~0x1ffffUL) != CKSEG0 61 && (entryhi & 0xff) == asid) { 62 #ifdef CONFIG_32BIT 63 int width = 8; 64 #else 65 int width = 11; 66 #endif 67 /* 68 * Only print entries in use 69 */ 70 printk("Index: %2d pgmask=%s ", i, msk2str(pagemask)); 71 72 c0 = (entrylo0 >> 3) & 7; 73 c1 = (entrylo1 >> 3) & 7; 74 75 printk("va=%0*lx asid=%02lx\n", 76 width, (entryhi & ~0x1fffUL), 77 entryhi & 0xff); 78 printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ", 79 width, 80 (entrylo0 << 6) & PAGE_MASK, c0, 81 (entrylo0 & 4) ? 1 : 0, 82 (entrylo0 & 2) ? 1 : 0, 83 (entrylo0 & 1) ? 1 : 0); 84 printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n", 85 width, 86 (entrylo1 << 6) & PAGE_MASK, c1, 87 (entrylo1 & 4) ? 1 : 0, 88 (entrylo1 & 2) ? 1 : 0, 89 (entrylo1 & 1) ? 1 : 0); 90 } 91 } 92 printk("\n"); 93 94 write_c0_entryhi(s_entryhi); 95 write_c0_index(s_index); 96 } 97 98 void dump_tlb_all(void) 99 { 100 dump_tlb(0, current_cpu_data.tlbsize - 1); 101 } 102