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/page.h> 13 #include <asm/pgtable.h> 14 15 extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */ 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() & 0xfc0; 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 & 0xffffe000) != 0x80000000 37 && (entryhi & 0xfc0) == asid) { 38 /* 39 * Only print entries in use 40 */ 41 printk("Index: %2d ", i); 42 43 printk("va=%08lx asid=%08lx" 44 " [pa=%06lx n=%d d=%d v=%d g=%d]", 45 (entryhi & 0xffffe000), 46 entryhi & 0xfc0, 47 entrylo0 & PAGE_MASK, 48 (entrylo0 & (1 << 11)) ? 1 : 0, 49 (entrylo0 & (1 << 10)) ? 1 : 0, 50 (entrylo0 & (1 << 9)) ? 1 : 0, 51 (entrylo0 & (1 << 8)) ? 1 : 0); 52 } 53 } 54 printk("\n"); 55 56 write_c0_entryhi(asid); 57 } 58 59 void dump_tlb_all(void) 60 { 61 dump_tlb(0, current_cpu_data.tlbsize - 1); 62 } 63