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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[karo-tx-linux.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 /*
19  * Descriptor for a cache
20  */
21 struct cache_desc {
22         unsigned int waysize;   /* Bytes per way */
23         unsigned short sets;    /* Number of lines per set */
24         unsigned char ways;     /* Number of ways */
25         unsigned char linesz;   /* Size of line in bytes */
26         unsigned char waybit;   /* Bits to select in a cache set */
27         unsigned char flags;    /* Flags describing cache properties */
28 };
29
30 struct guest_info {
31         unsigned long           ases;
32         unsigned long           ases_dyn;
33         unsigned long long      options;
34         unsigned long long      options_dyn;
35         int                     tlbsize;
36         u8                      conf;
37         u8                      kscratch_mask;
38 };
39
40 /*
41  * Flag definitions
42  */
43 #define MIPS_CACHE_NOT_PRESENT  0x00000001
44 #define MIPS_CACHE_VTAG         0x00000002      /* Virtually tagged cache */
45 #define MIPS_CACHE_ALIASES      0x00000004      /* Cache could have aliases */
46 #define MIPS_CACHE_IC_F_DC      0x00000008      /* Ic can refill from D-cache */
47 #define MIPS_IC_SNOOPS_REMOTE   0x00000010      /* Ic snoops remote stores */
48 #define MIPS_CACHE_PINDEX       0x00000020      /* Physically indexed cache */
49
50 struct cpuinfo_mips {
51         unsigned long           asid_cache;
52 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
53         unsigned long           asid_mask;
54 #endif
55
56         /*
57          * Capability and feature descriptor structure for MIPS CPU
58          */
59         unsigned long           ases;
60         unsigned long long      options;
61         unsigned int            udelay_val;
62         unsigned int            processor_id;
63         unsigned int            fpu_id;
64         unsigned int            fpu_csr31;
65         unsigned int            fpu_msk31;
66         unsigned int            msa_id;
67         unsigned int            cputype;
68         int                     isa_level;
69         int                     tlbsize;
70         int                     tlbsizevtlb;
71         int                     tlbsizeftlbsets;
72         int                     tlbsizeftlbways;
73         struct cache_desc       icache; /* Primary I-cache */
74         struct cache_desc       dcache; /* Primary D or combined I/D cache */
75         struct cache_desc       vcache; /* Victim cache, between pcache and scache */
76         struct cache_desc       scache; /* Secondary cache */
77         struct cache_desc       tcache; /* Tertiary/split secondary cache */
78         int                     srsets; /* Shadow register sets */
79         int                     package;/* physical package number */
80         int                     core;   /* physical core number */
81 #ifdef CONFIG_64BIT
82         int                     vmbits; /* Virtual memory size in bits */
83 #endif
84 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
85         /*
86          * There is not necessarily a 1:1 mapping of VPE num to CPU number
87          * in particular on multi-core systems.
88          */
89         int                     vpe_id;  /* Virtual Processor number */
90 #endif
91         void                    *data;  /* Additional data */
92         unsigned int            watch_reg_count;   /* Number that exist */
93         unsigned int            watch_reg_use_cnt; /* Usable by ptrace */
94 #define NUM_WATCH_REGS 4
95         u16                     watch_reg_masks[NUM_WATCH_REGS];
96         unsigned int            kscratch_mask; /* Usable KScratch mask. */
97         /*
98          * Cache Coherency attribute for write-combine memory writes.
99          * (shifted by _CACHE_SHIFT)
100          */
101         unsigned int            writecombine;
102         /*
103          * Simple counter to prevent enabling HTW in nested
104          * htw_start/htw_stop calls
105          */
106         unsigned int            htw_seq;
107
108         /* VZ & Guest features */
109         struct guest_info       guest;
110         unsigned int            gtoffset_mask;
111         unsigned int            guestid_mask;
112         unsigned int            guestid_cache;
113 } __attribute__((aligned(SMP_CACHE_BYTES)));
114
115 extern struct cpuinfo_mips cpu_data[];
116 #define current_cpu_data cpu_data[smp_processor_id()]
117 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
118 #define boot_cpu_data cpu_data[0]
119
120 extern void cpu_probe(void);
121 extern void cpu_report(void);
122
123 extern const char *__cpu_name[];
124 #define cpu_name_string()       __cpu_name[raw_smp_processor_id()]
125
126 struct seq_file;
127 struct notifier_block;
128
129 extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
130 extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
131
132 #define proc_cpuinfo_notifier(fn, pri)                                  \
133 ({                                                                      \
134         static struct notifier_block fn##_nb = {                        \
135                 .notifier_call = fn,                                    \
136                 .priority = pri                                         \
137         };                                                              \
138                                                                         \
139         register_proc_cpuinfo_notifier(&fn##_nb);                       \
140 })
141
142 struct proc_cpuinfo_notifier_args {
143         struct seq_file *m;
144         unsigned long n;
145 };
146
147 #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_CPU_MIPSR6)
148 # define cpu_vpe_id(cpuinfo)    ((cpuinfo)->vpe_id)
149 #else
150 # define cpu_vpe_id(cpuinfo)    ({ (void)cpuinfo; 0; })
151 #endif
152
153 static inline unsigned long cpu_asid_inc(void)
154 {
155         return 1 << CONFIG_MIPS_ASID_SHIFT;
156 }
157
158 static inline unsigned long cpu_asid_mask(struct cpuinfo_mips *cpuinfo)
159 {
160 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
161         return cpuinfo->asid_mask;
162 #endif
163         return ((1 << CONFIG_MIPS_ASID_BITS) - 1) << CONFIG_MIPS_ASID_SHIFT;
164 }
165
166 static inline void set_cpu_asid_mask(struct cpuinfo_mips *cpuinfo,
167                                      unsigned long asid_mask)
168 {
169 #ifdef CONFIG_MIPS_ASID_BITS_VARIABLE
170         cpuinfo->asid_mask = asid_mask;
171 #endif
172 }
173
174 #endif /* __ASM_CPU_INFO_H */