1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 /*
3 * Copyright (C) 2020-2022 Loongson Technology
4 */
5 #ifndef __ASM_CPU_INFO_H
6 #define __ASM_CPU_INFO_H
7
8 #include <linux/cache.h>
9 #include <linux/types.h>
10
11 #include <asm/loongarch.h>
12
13 /* cache_desc->flags */
14 enum {
15 CACHE_PRESENT = (1 << 0),
16 CACHE_PRIVATE = (1 << 1), /* cor
17 CACHE_INCLUSIVE = (1 << 2), /* inc
18 };
19
20 /*
21 * Descriptor for a cache
22 */
23 struct cache_desc {
24 unsigned char type;
25 unsigned char level;
26 unsigned short sets; /* Number of l
27 unsigned char ways; /* Number of w
28 unsigned char linesz; /* Size of lin
29 unsigned char flags; /* Flags descr
30 };
31
32 #define CACHE_LEVEL_MAX 3
33 #define CACHE_LEAVES_MAX 6
34
35 struct cpuinfo_loongarch {
36 u64 asid_cache;
37 unsigned long asid_mask;
38
39 /*
40 * Capability and feature descriptor s
41 */
42 unsigned long long options;
43 unsigned int processor_id;
44 unsigned int fpu_vers;
45 unsigned int fpu_csr0;
46 unsigned int fpu_mask;
47 unsigned int cputype;
48 int isa_level;
49 int tlbsize;
50 int tlbsizemtlb;
51 int tlbsizestlbset
52 int tlbsizestlbway
53 int cache_leaves_p
54 struct cache_desc cache_leaves[C
55 int core; /* phy
56 int package;/* phy
57 int global_id; /*
58 int vabits; /* Vir
59 int pabits; /* Phy
60 unsigned int ksave_mask; /*
61 unsigned int watch_dreg_cou
62 unsigned int watch_ireg_cou
63 unsigned int watch_reg_use_
64 } __aligned(SMP_CACHE_BYTES);
65
66 extern struct cpuinfo_loongarch cpu_data[];
67 #define boot_cpu_data cpu_data[0]
68 #define current_cpu_data cpu_data[smp_processo
69 #define raw_current_cpu_data cpu_data[raw_smp_
70
71 extern void cpu_probe(void);
72
73 extern const char *__cpu_family[];
74 extern const char *__cpu_full_name[];
75 #define cpu_family_string() __cpu_family[r
76 #define cpu_full_name_string() __cpu_full_nam
77
78 struct seq_file;
79 struct notifier_block;
80
81 extern int register_proc_cpuinfo_notifier(stru
82 extern int proc_cpuinfo_notifier_call_chain(un
83
84 #define proc_cpuinfo_notifier(fn, pri)
85 ({
86 static struct notifier_block fn##_nb =
87 .notifier_call = fn,
88 .priority = pri
89 };
90
91 register_proc_cpuinfo_notifier(&fn##_n
92 })
93
94 struct proc_cpuinfo_notifier_args {
95 struct seq_file *m;
96 unsigned long n;
97 };
98
99 static inline bool cpus_are_siblings(int cpua,
100 {
101 struct cpuinfo_loongarch *infoa = &cpu
102 struct cpuinfo_loongarch *infob = &cpu
103
104 if (infoa->package != infob->package)
105 return false;
106
107 if (infoa->core != infob->core)
108 return false;
109
110 return true;
111 }
112
113 static inline unsigned long cpu_asid_mask(stru
114 {
115 return cpuinfo->asid_mask;
116 }
117
118 static inline void set_cpu_asid_mask(struct cp
119 unsigned
120 {
121 cpuinfo->asid_mask = asid_mask;
122 }
123
124 #endif /* __ASM_CPU_INFO_H */
125
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.