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(first: 0, last: current_cpu_data.tlbsize - 1); |
71 | } |
72 | |