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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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/types.h>
16
17#include <asm/cache.h>
18
19/*
20 * Descriptor for a cache
21 */
22struct cache_desc {
23 unsigned int waysize; /* Bytes per way */
24 unsigned short sets; /* Number of lines per set */
25 unsigned char ways; /* Number of ways */
26 unsigned char linesz; /* Size of line in bytes */
27 unsigned char waybit; /* Bits to select in a cache set */
28 unsigned char flags; /* Flags describing cache properties */
29};
30
31/*
32 * Flag definitions
33 */
34#define MIPS_CACHE_NOT_PRESENT 0x00000001
35#define MIPS_CACHE_VTAG 0x00000002 /* Virtually tagged cache */
36#define MIPS_CACHE_ALIASES 0x00000004 /* Cache could have aliases */
37#define MIPS_CACHE_IC_F_DC 0x00000008 /* Ic can refill from D-cache */
38#define MIPS_IC_SNOOPS_REMOTE 0x00000010 /* Ic snoops remote stores */
39#define MIPS_CACHE_PINDEX 0x00000020 /* Physically indexed cache */
40
41struct cpuinfo_mips {
42 unsigned long asid_cache;
43
44 /*
45 * Capability and feature descriptor structure for MIPS CPU
46 */
47 unsigned long options;
48 unsigned long ases;
49 unsigned int udelay_val;
50 unsigned int processor_id;
51 unsigned int fpu_id;
52 unsigned int msa_id;
53 unsigned int cputype;
54 int isa_level;
55 int tlbsize;
56 int tlbsizevtlb;
57 int tlbsizeftlbsets;
58 int tlbsizeftlbways;
59 struct cache_desc icache; /* Primary I-cache */
60 struct cache_desc dcache; /* Primary D or combined I/D cache */
61 struct cache_desc scache; /* Secondary cache */
62 struct cache_desc tcache; /* Tertiary/split secondary cache */
63 int srsets; /* Shadow register sets */
64 int core; /* physical core number */
65#ifdef CONFIG_64BIT
66 int vmbits; /* Virtual memory size in bits */
67#endif
68#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
69 /*
70 * In the MIPS MT "SMTC" model, each TC is considered
71 * to be a "CPU" for the purposes of scheduling, but
72 * exception resources, ASID spaces, etc, are common
73 * to all TCs within the same VPE.
74 */
75 int vpe_id; /* Virtual Processor number */
76#endif
77#ifdef CONFIG_MIPS_MT_SMTC
78 int tc_id; /* Thread Context number */
79#endif
80 void *data; /* Additional data */
81 unsigned int watch_reg_count; /* Number that exist */
82 unsigned int watch_reg_use_cnt; /* Usable by ptrace */
83#define NUM_WATCH_REGS 4
84 u16 watch_reg_masks[NUM_WATCH_REGS];
85 unsigned int kscratch_mask; /* Usable KScratch mask. */
86} __attribute__((aligned(SMP_CACHE_BYTES)));
87
88extern struct cpuinfo_mips cpu_data[];
89#define current_cpu_data cpu_data[smp_processor_id()]
90#define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
91#define boot_cpu_data cpu_data[0]
92
93extern void cpu_probe(void);
94extern void cpu_report(void);
95
96extern const char *__cpu_name[];
97#define cpu_name_string() __cpu_name[smp_processor_id()]
98
99struct seq_file;
100struct notifier_block;
101
102extern int register_proc_cpuinfo_notifier(struct notifier_block *nb);
103extern int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v);
104
105#define proc_cpuinfo_notifier(fn, pri) \
106({ \
107 static struct notifier_block fn##_nb = { \
108 .notifier_call = fn, \
109 .priority = pri \
110 }; \
111 \
112 register_proc_cpuinfo_notifier(&fn##_nb); \
113})
114
115struct proc_cpuinfo_notifier_args {
116 struct seq_file *m;
117 unsigned long n;
118};
119
120#if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC)
121# define cpu_vpe_id(cpuinfo) ((cpuinfo)->vpe_id)
122#else
123# define cpu_vpe_id(cpuinfo) 0
124#endif
125
126#endif /* __ASM_CPU_INFO_H */