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 11 #include <asm/mipsregs.h> 12 #include <asm/mmu_context.h> 13 #include <asm/page.h> 14 #include <asm/pgtable.h> 15 #include <asm/tlbdebug.h> 16 17 static void dump_tlb(int first, int last) 18 { 19 int i; 20 unsigned int asid; 21 unsigned long entryhi, entrylo0; 22 23 asid = read_c0_entryhi() & ASID_MASK; 24 25 for (i = first; i <= last; i++) { 26 write_c0_index(i<<8); 27 __asm__ __volatile__( 28 ".set\tnoreorder\n\t" 29 "tlbr\n\t" 30 "nop\n\t" 31 ".set\treorder"); 32 entryhi = read_c0_entryhi(); 33 entrylo0 = read_c0_entrylo0(); 34 35 /* Unused entries have a virtual address of KSEG0. */ 36 if ((entryhi & PAGE_MASK) != KSEG0 && 37 (entrylo0 & R3K_ENTRYLO_G || 38 (entryhi & ASID_MASK) == asid)) { 39 /* 40 * Only print entries in use 41 */ 42 printk("Index: %2d ", i); 43 44 printk("va=%08lx asid=%08lx" 45 " [pa=%06lx n=%d d=%d v=%d g=%d]", 46 entryhi & PAGE_MASK, 47 entryhi & ASID_MASK, 48 entrylo0 & PAGE_MASK, 49 (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0, 50 (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0, 51 (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0, 52 (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0); 53 } 54 } 55 printk("\n"); 56 57 write_c0_entryhi(asid); 58 } 59 60 void dump_tlb_all(void) 61 { 62 dump_tlb(0, current_cpu_data.tlbsize - 1); 63 } 64