1 // SPDX-License-Identifier: GPL-2.0
3 * Dump R3000 TLB for debugging purposes.
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
9 #include <linux/kernel.h>
12 #include <asm/mipsregs.h>
13 #include <asm/mmu_context.h>
15 #include <asm/pgtable.h>
16 #include <asm/tlbdebug.h>
18 extern int r3k_have_wired_reg;
20 void dump_tlb_regs(void)
22 pr_info("Index : %0x\n", read_c0_index());
23 pr_info("EntryHi : %0lx\n", read_c0_entryhi());
24 pr_info("EntryLo : %0lx\n", read_c0_entrylo0());
25 if (r3k_have_wired_reg)
26 pr_info("Wired : %0x\n", read_c0_wired());
29 static void dump_tlb(int first, int last)
33 unsigned long entryhi, entrylo0, asid_mask;
35 asid_mask = cpu_asid_mask(¤t_cpu_data);
36 asid = read_c0_entryhi() & asid_mask;
38 for (i = first; i <= last; i++) {
45 entryhi = read_c0_entryhi();
46 entrylo0 = read_c0_entrylo0();
48 /* Unused entries have a virtual address of KSEG0. */
49 if ((entryhi & PAGE_MASK) != KSEG0 &&
50 (entrylo0 & R3K_ENTRYLO_G ||
51 (entryhi & asid_mask) == asid)) {
53 * Only print entries in use
55 printk("Index: %2d ", i);
57 pr_cont("va=%08lx asid=%08lx"
58 " [pa=%06lx n=%d d=%d v=%d g=%d]",
62 (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
63 (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
64 (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
65 (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
70 write_c0_entryhi(asid);
73 void dump_tlb_all(void)
75 dump_tlb(0, current_cpu_data.tlbsize - 1);