arm64: dts: qcom: sm8550: add TRNG node
[linux-modified.git] / arch / loongarch / lib / dump_tlb.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
4  *
5  * Derived from MIPS:
6  * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
7  * Copyright (C) 1999 by Silicon Graphics, Inc.
8  */
9 #include <linux/kernel.h>
10 #include <linux/mm.h>
11
12 #include <asm/loongarch.h>
13 #include <asm/page.h>
14 #include <asm/pgtable.h>
15 #include <asm/tlb.h>
16
17 void dump_tlb_regs(void)
18 {
19         const int field = 2 * sizeof(unsigned long);
20
21         pr_info("Index    : 0x%0x\n", read_csr_tlbidx());
22         pr_info("PageSize : 0x%0x\n", read_csr_pagesize());
23         pr_info("EntryHi  : 0x%0*lx\n", field, read_csr_entryhi());
24         pr_info("EntryLo0 : 0x%0*lx\n", field, read_csr_entrylo0());
25         pr_info("EntryLo1 : 0x%0*lx\n", field, read_csr_entrylo1());
26 }
27
28 static void dump_tlb(int first, int last)
29 {
30         unsigned long s_entryhi, entryhi, asid;
31         unsigned long long entrylo0, entrylo1, pa;
32         unsigned int index;
33         unsigned int s_index, s_asid;
34         unsigned int pagesize, c0, c1, i;
35         unsigned long asidmask = cpu_asid_mask(&current_cpu_data);
36         int pwidth = 16;
37         int vwidth = 16;
38         int asidwidth = DIV_ROUND_UP(ilog2(asidmask) + 1, 4);
39
40         s_entryhi = read_csr_entryhi();
41         s_index = read_csr_tlbidx();
42         s_asid = read_csr_asid();
43
44         for (i = first; i <= last; i++) {
45                 write_csr_index(i);
46                 tlb_read();
47                 pagesize = read_csr_pagesize();
48                 entryhi  = read_csr_entryhi();
49                 entrylo0 = read_csr_entrylo0();
50                 entrylo1 = read_csr_entrylo1();
51                 index = read_csr_tlbidx();
52                 asid = read_csr_asid();
53
54                 /* EHINV bit marks entire entry as invalid */
55                 if (index & CSR_TLBIDX_EHINV)
56                         continue;
57                 /*
58                  * ASID takes effect in absence of G (global) bit.
59                  */
60                 if (!((entrylo0 | entrylo1) & ENTRYLO_G) &&
61                     asid != s_asid)
62                         continue;
63
64                 /*
65                  * Only print entries in use
66                  */
67                 pr_info("Index: %4d pgsize=0x%x ", i, (1 << pagesize));
68
69                 c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
70                 c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
71
72                 pr_cont("va=0x%0*lx asid=0x%0*lx",
73                         vwidth, (entryhi & ~0x1fffUL), asidwidth, asid & asidmask);
74
75                 /* NR/NX are in awkward places, so mask them off separately */
76                 pa = entrylo0 & ~(ENTRYLO_NR | ENTRYLO_NX);
77                 pa = pa & PAGE_MASK;
78                 pr_cont("\n\t[");
79                 pr_cont("nr=%d nx=%d ",
80                         (entrylo0 & ENTRYLO_NR) ? 1 : 0,
81                         (entrylo0 & ENTRYLO_NX) ? 1 : 0);
82                 pr_cont("pa=0x%0*llx c=%d d=%d v=%d g=%d plv=%lld] [",
83                         pwidth, pa, c0,
84                         (entrylo0 & ENTRYLO_D) ? 1 : 0,
85                         (entrylo0 & ENTRYLO_V) ? 1 : 0,
86                         (entrylo0 & ENTRYLO_G) ? 1 : 0,
87                         (entrylo0 & ENTRYLO_PLV) >> ENTRYLO_PLV_SHIFT);
88                 /* NR/NX are in awkward places, so mask them off separately */
89                 pa = entrylo1 & ~(ENTRYLO_NR | ENTRYLO_NX);
90                 pa = pa & PAGE_MASK;
91                 pr_cont("nr=%d nx=%d ",
92                         (entrylo1 & ENTRYLO_NR) ? 1 : 0,
93                         (entrylo1 & ENTRYLO_NX) ? 1 : 0);
94                 pr_cont("pa=0x%0*llx c=%d d=%d v=%d g=%d plv=%lld]\n",
95                         pwidth, pa, c1,
96                         (entrylo1 & ENTRYLO_D) ? 1 : 0,
97                         (entrylo1 & ENTRYLO_V) ? 1 : 0,
98                         (entrylo1 & ENTRYLO_G) ? 1 : 0,
99                         (entrylo1 & ENTRYLO_PLV) >> ENTRYLO_PLV_SHIFT);
100         }
101         pr_info("\n");
102
103         write_csr_entryhi(s_entryhi);
104         write_csr_tlbidx(s_index);
105         write_csr_asid(s_asid);
106 }
107
108 void dump_tlb_all(void)
109 {
110         dump_tlb(0, current_cpu_data.tlbsize - 1);
111 }