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 extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */ 18 19 static void dump_tlb(int first, int last) 20 { 21 int i; 22 unsigned int asid; 23 unsigned long entryhi, entrylo0; 24 25 asid = ASID_MASK(read_c0_entryhi()); 26 27 for (i = first; i <= last; i++) { 28 write_c0_index(i<<8); 29 __asm__ __volatile__( 30 ".set\tnoreorder\n\t" 31 "tlbr\n\t" 32 "nop\n\t" 33 ".set\treorder"); 34 entryhi = read_c0_entryhi(); 35 entrylo0 = read_c0_entrylo0(); 36 37 /* Unused entries have a virtual address of KSEG0. */ 38 if ((entryhi & 0xffffe000) != 0x80000000 39 && (ASID_MASK(entryhi) == asid)) { 40 /* 41 * Only print entries in use 42 */ 43 printk("Index: %2d ", i); 44 45 printk("va=%08lx asid=%08lx" 46 " [pa=%06lx n=%d d=%d v=%d g=%d]", 47 (entryhi & 0xffffe000), 48 ASID_MASK(entryhi), 49 entrylo0 & PAGE_MASK, 50 (entrylo0 & (1 << 11)) ? 1 : 0, 51 (entrylo0 & (1 << 10)) ? 1 : 0, 52 (entrylo0 & (1 << 9)) ? 1 : 0, 53 (entrylo0 & (1 << 8)) ? 1 : 0); 54 } 55 } 56 printk("\n"); 57 58 write_c0_entryhi(asid); 59 } 60 61 void dump_tlb_all(void) 62 { 63 dump_tlb(0, current_cpu_data.tlbsize - 1); 64 } 65