1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Dump R3000 TLB for debugging purposes. 4 * 5 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle. 6 * Copyright (C) 1999 by Silicon Graphics, Inc. 7 * Copyright (C) 1999 by Harald Koerfgen 8 */ 9 #include <linux/kernel.h> 10 #include <linux/mm.h> 11 12 #include <asm/mipsregs.h> 13 #include <asm/mmu_context.h> 14 #include <asm/page.h> 15 #include <asm/tlbdebug.h> 16 17 void dump_tlb_regs(void) 18 { 19 pr_info("Index : %0x\n", read_c0_index()); 20 pr_info("EntryHi : %0lx\n", read_c0_entryhi()); 21 pr_info("EntryLo : %0lx\n", read_c0_entrylo0()); 22 } 23 24 static void dump_tlb(int first, int last) 25 { 26 int i; 27 unsigned int asid; 28 unsigned long entryhi, entrylo0, asid_mask; 29 30 asid_mask = cpu_asid_mask(¤t_cpu_data); 31 asid = read_c0_entryhi() & asid_mask; 32 33 for (i = first; i <= last; i++) { 34 write_c0_index(i<<8); 35 __asm__ __volatile__( 36 ".set\tnoreorder\n\t" 37 "tlbr\n\t" 38 "nop\n\t" 39 ".set\treorder"); 40 entryhi = read_c0_entryhi(); 41 entrylo0 = read_c0_entrylo0(); 42 43 /* Unused entries have a virtual address of KSEG0. */ 44 if ((entryhi & PAGE_MASK) != KSEG0 && 45 (entrylo0 & R3K_ENTRYLO_G || 46 (entryhi & asid_mask) == asid)) { 47 /* 48 * Only print entries in use 49 */ 50 printk("Index: %2d ", i); 51 52 pr_cont("va=%08lx asid=%08lx" 53 " [pa=%06lx n=%d d=%d v=%d g=%d]", 54 entryhi & PAGE_MASK, 55 entryhi & asid_mask, 56 entrylo0 & PAGE_MASK, 57 (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0, 58 (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0, 59 (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0, 60 (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0); 61 } 62 } 63 printk("\n"); 64 65 write_c0_entryhi(asid); 66 } 67 68 void dump_tlb_all(void) 69 { 70 dump_tlb(0, current_cpu_data.tlbsize - 1); 71 } 72