arm64: dts: qcom: sm8550: add TRNG node
[linux-modified.git] / arch / mips / lib / dump_tlb.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Dump R4x00 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  */
8 #include <linux/kernel.h>
9 #include <linux/mm.h>
10
11 #include <asm/hazards.h>
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         const int field = 2 * sizeof(unsigned long);
20
21         pr_info("Index    : %0x\n", read_c0_index());
22         pr_info("PageMask : %0x\n", read_c0_pagemask());
23         if (cpu_has_guestid)
24                 pr_info("GuestCtl1: %0x\n", read_c0_guestctl1());
25         pr_info("EntryHi  : %0*lx\n", field, read_c0_entryhi());
26         pr_info("EntryLo0 : %0*lx\n", field, read_c0_entrylo0());
27         pr_info("EntryLo1 : %0*lx\n", field, read_c0_entrylo1());
28         pr_info("Wired    : %0x\n", read_c0_wired());
29         switch (current_cpu_type()) {
30         case CPU_R10000:
31         case CPU_R12000:
32         case CPU_R14000:
33         case CPU_R16000:
34                 pr_info("FrameMask: %0x\n", read_c0_framemask());
35                 break;
36         }
37         if (cpu_has_small_pages || cpu_has_rixi || cpu_has_xpa)
38                 pr_info("PageGrain: %0x\n", read_c0_pagegrain());
39         if (cpu_has_htw) {
40                 pr_info("PWField  : %0*lx\n", field, read_c0_pwfield());
41                 pr_info("PWSize   : %0*lx\n", field, read_c0_pwsize());
42                 pr_info("PWCtl    : %0x\n", read_c0_pwctl());
43         }
44 }
45
46 static inline const char *msk2str(unsigned int mask)
47 {
48         switch (mask) {
49         case PM_4K:     return "4kb";
50         case PM_16K:    return "16kb";
51         case PM_64K:    return "64kb";
52         case PM_256K:   return "256kb";
53 #ifdef CONFIG_CPU_CAVIUM_OCTEON
54         case PM_8K:     return "8kb";
55         case PM_32K:    return "32kb";
56         case PM_128K:   return "128kb";
57         case PM_512K:   return "512kb";
58         case PM_2M:     return "2Mb";
59         case PM_8M:     return "8Mb";
60         case PM_32M:    return "32Mb";
61 #endif
62         }
63         return "";
64 }
65
66 static void dump_tlb(int first, int last)
67 {
68         unsigned long s_entryhi, entryhi, asid, mmid;
69         unsigned long long entrylo0, entrylo1, pa;
70         unsigned int s_index, s_pagemask, s_guestctl1 = 0;
71         unsigned int pagemask, guestctl1 = 0, c0, c1, i;
72         unsigned long asidmask = cpu_asid_mask(&current_cpu_data);
73         int asidwidth = DIV_ROUND_UP(ilog2(asidmask) + 1, 4);
74         unsigned long s_mmid;
75 #ifdef CONFIG_32BIT
76         bool xpa = cpu_has_xpa && (read_c0_pagegrain() & PG_ELPA);
77         int pwidth = xpa ? 11 : 8;
78         int vwidth = 8;
79 #else
80         bool xpa = false;
81         int pwidth = 11;
82         int vwidth = 11;
83 #endif
84
85         s_pagemask = read_c0_pagemask();
86         s_entryhi = read_c0_entryhi();
87         s_index = read_c0_index();
88
89         if (cpu_has_mmid)
90                 asid = s_mmid = read_c0_memorymapid();
91         else
92                 asid = s_entryhi & asidmask;
93
94         if (cpu_has_guestid)
95                 s_guestctl1 = read_c0_guestctl1();
96
97         for (i = first; i <= last; i++) {
98                 write_c0_index(i);
99                 mtc0_tlbr_hazard();
100                 tlb_read();
101                 tlb_read_hazard();
102                 pagemask = read_c0_pagemask();
103                 entryhi  = read_c0_entryhi();
104                 entrylo0 = read_c0_entrylo0();
105                 entrylo1 = read_c0_entrylo1();
106
107                 if (cpu_has_mmid)
108                         mmid = read_c0_memorymapid();
109                 else
110                         mmid = entryhi & asidmask;
111
112                 if (cpu_has_guestid)
113                         guestctl1 = read_c0_guestctl1();
114
115                 /* EHINV bit marks entire entry as invalid */
116                 if (cpu_has_tlbinv && entryhi & MIPS_ENTRYHI_EHINV)
117                         continue;
118                 /*
119                  * Prior to tlbinv, unused entries have a virtual address of
120                  * CKSEG0.
121                  */
122                 if ((entryhi & ~0x1ffffUL) == CKSEG0)
123                         continue;
124                 /*
125                  * ASID takes effect in absence of G (global) bit.
126                  * We check both G bits, even though architecturally they should
127                  * match one another, because some revisions of the SB1 core may
128                  * leave only a single G bit set after a machine check exception
129                  * due to duplicate TLB entry.
130                  */
131                 if (!((entrylo0 | entrylo1) & ENTRYLO_G) && (mmid != asid))
132                         continue;
133
134                 /*
135                  * Only print entries in use
136                  */
137                 printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
138
139                 c0 = (entrylo0 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
140                 c1 = (entrylo1 & ENTRYLO_C) >> ENTRYLO_C_SHIFT;
141
142                 pr_cont("va=%0*lx asid=%0*lx",
143                         vwidth, (entryhi & ~0x1fffUL),
144                         asidwidth, mmid);
145                 if (cpu_has_guestid)
146                         pr_cont(" gid=%02lx",
147                                 (guestctl1 & MIPS_GCTL1_RID)
148                                         >> MIPS_GCTL1_RID_SHIFT);
149                 /* RI/XI are in awkward places, so mask them off separately */
150                 pa = entrylo0 & ~(MIPS_ENTRYLO_RI | MIPS_ENTRYLO_XI);
151                 if (xpa)
152                         pa |= (unsigned long long)readx_c0_entrylo0() << 30;
153                 pa = (pa << 6) & PAGE_MASK;
154                 pr_cont("\n\t[");
155                 if (cpu_has_rixi)
156                         pr_cont("ri=%d xi=%d ",
157                                 (entrylo0 & MIPS_ENTRYLO_RI) ? 1 : 0,
158                                 (entrylo0 & MIPS_ENTRYLO_XI) ? 1 : 0);
159                 pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d] [",
160                         pwidth, pa, c0,
161                         (entrylo0 & ENTRYLO_D) ? 1 : 0,
162                         (entrylo0 & ENTRYLO_V) ? 1 : 0,
163                         (entrylo0 & ENTRYLO_G) ? 1 : 0);
164                 /* RI/XI are in awkward places, so mask them off separately */
165                 pa = entrylo1 & ~(MIPS_ENTRYLO_RI | MIPS_ENTRYLO_XI);
166                 if (xpa)
167                         pa |= (unsigned long long)readx_c0_entrylo1() << 30;
168                 pa = (pa << 6) & PAGE_MASK;
169                 if (cpu_has_rixi)
170                         pr_cont("ri=%d xi=%d ",
171                                 (entrylo1 & MIPS_ENTRYLO_RI) ? 1 : 0,
172                                 (entrylo1 & MIPS_ENTRYLO_XI) ? 1 : 0);
173                 pr_cont("pa=%0*llx c=%d d=%d v=%d g=%d]\n",
174                         pwidth, pa, c1,
175                         (entrylo1 & ENTRYLO_D) ? 1 : 0,
176                         (entrylo1 & ENTRYLO_V) ? 1 : 0,
177                         (entrylo1 & ENTRYLO_G) ? 1 : 0);
178         }
179         printk("\n");
180
181         write_c0_entryhi(s_entryhi);
182         write_c0_index(s_index);
183         write_c0_pagemask(s_pagemask);
184         if (cpu_has_guestid)
185                 write_c0_guestctl1(s_guestctl1);
186 }
187
188 void dump_tlb_all(void)
189 {
190         dump_tlb(0, current_cpu_data.tlbsize - 1);
191 }