1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Dump R3000 TLB for debugging purposes.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
6*4882a593Smuzhiyun * Copyright (C) 1999 by Silicon Graphics, Inc.
7*4882a593Smuzhiyun * Copyright (C) 1999 by Harald Koerfgen
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/mm.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <asm/mipsregs.h>
13*4882a593Smuzhiyun #include <asm/mmu_context.h>
14*4882a593Smuzhiyun #include <asm/page.h>
15*4882a593Smuzhiyun #include <asm/tlbdebug.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun extern int r3k_have_wired_reg;
18*4882a593Smuzhiyun
dump_tlb_regs(void)19*4882a593Smuzhiyun void dump_tlb_regs(void)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun pr_info("Index : %0x\n", read_c0_index());
22*4882a593Smuzhiyun pr_info("EntryHi : %0lx\n", read_c0_entryhi());
23*4882a593Smuzhiyun pr_info("EntryLo : %0lx\n", read_c0_entrylo0());
24*4882a593Smuzhiyun if (r3k_have_wired_reg)
25*4882a593Smuzhiyun pr_info("Wired : %0x\n", read_c0_wired());
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
dump_tlb(int first,int last)28*4882a593Smuzhiyun static void dump_tlb(int first, int last)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun int i;
31*4882a593Smuzhiyun unsigned int asid;
32*4882a593Smuzhiyun unsigned long entryhi, entrylo0, asid_mask;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun asid_mask = cpu_asid_mask(¤t_cpu_data);
35*4882a593Smuzhiyun asid = read_c0_entryhi() & asid_mask;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun for (i = first; i <= last; i++) {
38*4882a593Smuzhiyun write_c0_index(i<<8);
39*4882a593Smuzhiyun __asm__ __volatile__(
40*4882a593Smuzhiyun ".set\tnoreorder\n\t"
41*4882a593Smuzhiyun "tlbr\n\t"
42*4882a593Smuzhiyun "nop\n\t"
43*4882a593Smuzhiyun ".set\treorder");
44*4882a593Smuzhiyun entryhi = read_c0_entryhi();
45*4882a593Smuzhiyun entrylo0 = read_c0_entrylo0();
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun /* Unused entries have a virtual address of KSEG0. */
48*4882a593Smuzhiyun if ((entryhi & PAGE_MASK) != KSEG0 &&
49*4882a593Smuzhiyun (entrylo0 & R3K_ENTRYLO_G ||
50*4882a593Smuzhiyun (entryhi & asid_mask) == asid)) {
51*4882a593Smuzhiyun /*
52*4882a593Smuzhiyun * Only print entries in use
53*4882a593Smuzhiyun */
54*4882a593Smuzhiyun printk("Index: %2d ", i);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun pr_cont("va=%08lx asid=%08lx"
57*4882a593Smuzhiyun " [pa=%06lx n=%d d=%d v=%d g=%d]",
58*4882a593Smuzhiyun entryhi & PAGE_MASK,
59*4882a593Smuzhiyun entryhi & asid_mask,
60*4882a593Smuzhiyun entrylo0 & PAGE_MASK,
61*4882a593Smuzhiyun (entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
62*4882a593Smuzhiyun (entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
63*4882a593Smuzhiyun (entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
64*4882a593Smuzhiyun (entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun printk("\n");
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun write_c0_entryhi(asid);
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
dump_tlb_all(void)72*4882a593Smuzhiyun void dump_tlb_all(void)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun dump_tlb(0, current_cpu_data.tlbsize - 1);
75*4882a593Smuzhiyun }
76