Merge tag 'vfio-v4.21-rc1' of git://github.com/awilliam/linux-vfio
[sfrench/cifs-2.6.git] / arch / mips / include / asm / cpu-info.h
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License.  See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * Copyright (C) 1994 Waldorf GMBH
7  * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
8  * Copyright (C) 1996 Paul M. Antoine
9  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
10  * Copyright (C) 2004  Maciej W. Rozycki
11  */
12 #ifndef __ASM_CPU_INFO_H
13 #define __ASM_CPU_INFO_H
14
15 #include <linux/cache.h>
16 #include <linux/types.h>
17
18 #include <asm/mipsregs.h>
19
20 /*
21  * Descriptor for a cache
22  */
23 struct cache_desc {
24         unsigned int waysize;   /* Bytes per way */
25         unsigned short sets;    /* Number of lines per set */
26         unsigned char ways;     /* Number of ways */
27         unsigned char linesz;   /* Size of line in bytes */
28         unsigned char waybit;   /* Bits to select in a cache set */
29         unsigned char flags;    /* Flags describing cache properties */
30 };
31
32 struct guest_info {
33         unsigned long           ases;
34         unsigned long           ases_dyn;
35         unsigned long long      options;
36         unsigned long long      options_dyn;
37         int                     tlbsize;
38         u8                      conf;
39         u8                      kscratch_mask;
40 };
41
42 /*
43  * Flag definitions
44  */
45 #define MIPS_CACHE_NOT_PRESENT  0x00000001
46 #define MIPS_CACHE_VTAG         0x00000002      /* Virtually tagged cache */
47 #define MIPS_CACHE_ALIASES      0x00000004      /* Cache could have aliases */
48 #define MIPS_CACHE_IC_F_DC      0x00000008      /* Ic can refill from D-cache */
49 #define MIPS_IC_SNOOPS_REMOTE   0x00000010      /* Ic snoops remote stores */
50 #define MIPS_CACHE_PINDEX       0x00000020      /* Physically indexed cache */
51
52 struct cpuinfo_mips {
53         u64                     asid_cache;
54 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
55         unsigned long           asid_mask;
56 #endif
57
58         /*
59          * Capability and feature descriptor structure for MIPS CPU
60          */
61         unsigned long           ases;
62         unsigned long long      options;
63         unsigned int            udelay_val;
64         unsigned int            processor_id;
65         unsigned int            fpu_id;
66         unsigned int            fpu_csr31;
67         unsigned int            fpu_msk31;
68         unsigned int            msa_id;
69         unsigned int            cputype;
70         int                     isa_level;
71         int                     tlbsize;
72         int                     tlbsizevtlb;
73         int                     tlbsizeftlbsets;
74         int                     tlbsizeftlbways;
75         struct cache_desc       icache; /* Primary I-cache */
76         struct cache_desc       dcache; /* Primary D or combined I/D cache */
77         struct cache_desc       vcache; /* Victim cache, between pcache and scache */
78         struct cache_desc       scache; /* Secondary cache */
79         struct cache_desc       tcache; /* Tertiary/split secondary cache */
80         int                     srsets; /* Shadow register sets */
81         int                     package;/* physical package number */
82         unsigned int            globalnumber;
83 #ifdef CONFIG_64BIT
84         int                     vmbits; /* Virtual memory size in bits */
85 #endif
86         void                    *data;  /* Additional data */
87         unsigned int            watch_reg_count;   /* Number that exist */
88         unsigned int            watch_reg_use_cnt; /* Usable by ptrace */
89 #define NUM_WATCH_REGS 4
90         u16                     watch_reg_masks[NUM_WATCH_REGS];
91         unsigned int            kscratch_mask; /* Usable KScratch mask. */
92         /*
93          * Cache Coherency attribute for write-combine memory writes.
94          * (shifted by _CACHE_SHIFT)
95          */
96         unsigned int            writecombine;
97         /*
98          * Simple counter to prevent enabling HTW in nested
99          * htw_start/htw_stop calls
100          */
101         unsigned int            htw_seq;
102
103         /* VZ & Guest features */
104         struct guest_info       guest;
105         unsigned int            gtoffset_mask;
106         unsigned int            guestid_mask;
107         unsigned int            guestid_cache;
108 } __attribute__((aligned(SMP_CACHE_BYTES)));
109
110 extern struct cpuinfo_mips cpu_data[];
111 #define current_cpu_data cpu_data[smp_processor_id()]
112 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
113 #define boot_cpu_data cpu_data[0]
114
115 extern void cpu_probe(void);
116 extern void cpu_report(void);
117
118 extern const char *__cpu_name[];
119 #define cpu_name_string()       __cpu_name[raw_smp_processor_id()]
120
121 struct seq_file;
122 struct notifier_block;
123
124 extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
125 extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
126
127 #define proc_cpuinfo_notifier(fn, pri)                                  \
128 ({                                                                      \
129         static struct notifier_block fn##_nb = {                        \
130                 .notifier_call = fn,                                    \
131                 .priority = pri                                         \
132         };                                                              \
133                                                                         \
134         register_proc_cpuinfo_notifier(&fn##_nb);                       \
135 })
136
137 struct proc_cpuinfo_notifier_args {
138         struct seq_file *m;
139         unsigned long n;
140 };
141
142 static inline unsigned int cpu_cluster(struct cpuinfo_mips *cpuinfo)
143 {
144         /* Optimisation for systems where multiple clusters aren't used */
145         if (!IS_ENABLED(CONFIG_CPU_MIPSR6))
146                 return 0;
147
148         return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CLUSTER) >>
149                 MIPS_GLOBALNUMBER_CLUSTER_SHF;
150 }
151
152 static inline unsigned int cpu_core(struct cpuinfo_mips *cpuinfo)
153 {
154         return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_CORE) >>
155                 MIPS_GLOBALNUMBER_CORE_SHF;
156 }
157
158 static inline unsigned int cpu_vpe_id(struct cpuinfo_mips *cpuinfo)
159 {
160         /* Optimisation for systems where VP(E)s aren't used */
161         if (!IS_ENABLED(CONFIG_MIPS_MT_SMP) && !IS_ENABLED(CONFIG_CPU_MIPSR6))
162                 return 0;
163
164         return (cpuinfo->globalnumber & MIPS_GLOBALNUMBER_VP) >>
165                 MIPS_GLOBALNUMBER_VP_SHF;
166 }
167
168 extern void cpu_set_cluster(struct cpuinfo_mips *cpuinfo, unsigned int cluster);
169 extern void cpu_set_core(struct cpuinfo_mips *cpuinfo, unsigned int core);
170 extern void cpu_set_vpe_id(struct cpuinfo_mips *cpuinfo, unsigned int vpe);
171
172 static inline bool cpus_are_siblings(int cpua, int cpub)
173 {
174         struct cpuinfo_mips *infoa = &cpu_data[cpua];
175         struct cpuinfo_mips *infob = &cpu_data[cpub];
176         unsigned int gnuma, gnumb;
177
178         if (infoa->package != infob->package)
179                 return false;
180
181         gnuma = infoa->globalnumber & ~MIPS_GLOBALNUMBER_VP;
182         gnumb = infob->globalnumber & ~MIPS_GLOBALNUMBER_VP;
183         if (gnuma != gnumb)
184                 return false;
185
186         return true;
187 }
188
189 static inline unsigned long cpu_asid_inc(void)
190 {
191         return 1 << CONFIG_MIPS_ASID_SHIFT;
192 }
193
194 static inline unsigned long cpu_asid_mask(struct cpuinfo_mips *cpuinfo)
195 {
196 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
197         return cpuinfo->asid_mask;
198 #endif
199         return ((1 << CONFIG_MIPS_ASID_BITS) - 1) << CONFIG_MIPS_ASID_SHIFT;
200 }
201
202 static inline void set_cpu_asid_mask(struct cpuinfo_mips *cpuinfo,
203                                      unsigned long asid_mask)
204 {
205 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
206         cpuinfo->asid_mask = asid_mask;
207 #endif
208 }
209
210 #endif /* __ASM_CPU_INFO_H */