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; 18 19 void dump_tlb_regs(void) 20 { 21 pr_info("Index : %0x\n", read_c0_index()); 22 pr_info("EntryHi : %0lx\n", read_c0_entryhi()); 23 pr_info("EntryLo : %0lx\n", read_c0_entrylo0()); 24 if (r3k_have_wired_reg) 25 pr_info("Wired : %0x\n", read_c0_wired()); 26 } 27 28 static void dump_tlb(int first, int last) 29 { 30 int i; 31 unsigned int asid; 32 unsigned long entryhi, entrylo0; 33 34 asid = read_c0_entryhi() & ASID_MASK; 35 36 for (i = first; i <= last; i++) { 37 write_c0_index(i<<8); 38 __asm__ __volatile__( 39 ".set\tnoreorder\n\t" 40 "tlbr\n\t" 41 "nop\n\t" 42 ".set\treorder"); 43 entryhi = read_c0_entryhi(); 44 entrylo0 = read_c0_entrylo0(); 45 46 /* Unused entries have a virtual address of KSEG0. */ 47 if ((entryhi & PAGE_MASK) != KSEG0 && 48 (entrylo0 & R3K_ENTRYLO_G || 49 (entryhi & ASID_MASK) == asid)) { 50 /* 51 * Only print entries in use 52 */ 53 printk("Index: %2d ", i); 54 55 printk("va=%08lx asid=%08lx" 56 " [pa=%06lx n=%d d=%d v=%d g=%d]", 57 entryhi & PAGE_MASK, 58 entryhi & ASID_MASK, 59 entrylo0 & PAGE_MASK, 60 (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0, 61 (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0, 62 (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0, 63 (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0); 64 } 65 } 66 printk("\n"); 67 68 write_c0_entryhi(asid); 69 } 70 71 void dump_tlb_all(void) 72 { 73 dump_tlb(0, current_cpu_data.tlbsize - 1); 74 } 75