// SPDX-License-Identifier: GPL-2.0 /* * Dump R3000 TLB for debugging purposes. * * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle. * Copyright (C) 1999 by Silicon Graphics, Inc. * Copyright (C) 1999 by Harald Koerfgen */ #include <linux/kernel.h> #include <linux/mm.h> #include <asm/mipsregs.h> #include <asm/mmu_context.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/tlbdebug.h> extern int r3k_have_wired_reg; void dump_tlb_regs(void) { pr_info("Index : %0x\n", read_c0_index()); pr_info("EntryHi : %0lx\n", read_c0_entryhi()); pr_info("EntryLo : %0lx\n", read_c0_entrylo0()); if (r3k_have_wired_reg) pr_info("Wired : %0x\n", read_c0_wired()); } static void dump_tlb(int first, int last) { int i; unsigned int asid; unsigned long entryhi, entrylo0, asid_mask; asid_mask = cpu_asid_mask(¤t_cpu_data); asid = read_c0_entryhi() & asid_mask; for (i = first; i <= last; i++) { write_c0_index(i<<8); __asm__ __volatile__( ".set\tnoreorder\n\t" "tlbr\n\t" "nop\n\t" ".set\treorder"); entryhi = read_c0_entryhi(); entrylo0 = read_c0_entrylo0(); /* Unused entries have a virtual address of KSEG0. */ if ((entryhi & PAGE_MASK) != KSEG0 && (entrylo0 & R3K_ENTRYLO_G || (entryhi & asid_mask) == asid)) { /* * Only print entries in use */ printk("Index: %2d ", i); pr_cont("va=%08lx asid=%08lx" " [pa=%06lx n=%d d=%d v=%d g=%d]", entryhi & PAGE_MASK, entryhi & asid_mask, entrylo0 & PAGE_MASK, (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0, (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0, (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0, (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0); } } printk("\n"); write_c0_entryhi(asid); } void dump_tlb_all(void) { dump_tlb(0, current_cpu_data.tlbsize - 1); }