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Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +11001#ifndef _VDSO_DATAPAGE_H
2#define _VDSO_DATAPAGE_H
Arnd Bergmann88ced032005-12-16 22:43:46 +01003#ifdef __KERNEL__
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +11004
5/*
6 * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
7 * Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
8 * IBM Corp.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16
17/*
18 * Note about this structure:
19 *
20 * This structure was historically called systemcfg and exposed to
21 * userland via /proc/ppc64/systemcfg. Unfortunately, this became an
22 * ABI issue as some proprietary software started relying on being able
23 * to mmap() it, thus we have to keep the base layout at least for a
24 * few kernel versions.
25 *
26 * However, since ppc32 doesn't suffer from this backward handicap,
27 * a simpler version of the data structure is used there with only the
28 * fields actually used by the vDSO.
29 *
30 */
31
32/*
33 * If the major version changes we are incompatible.
34 * Minor version changes are a hint.
35 */
36#define SYSTEMCFG_MAJOR 1
37#define SYSTEMCFG_MINOR 1
38
39#ifndef __ASSEMBLY__
40
41#include <linux/unistd.h>
Paul Mackerras597bc5c2008-10-27 23:56:03 +000042#include <linux/time.h>
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +110043
44#define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32)
45
46/*
47 * So here is the ppc64 backward compatible version
48 */
49
50#ifdef CONFIG_PPC64
51
52struct vdso_data {
53 __u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */
54 struct { /* Systemcfg version numbers */
55 __u32 major; /* Major number 0x10 */
56 __u32 minor; /* Minor number 0x14 */
57 } version;
58
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +110059 /* Note about the platform flags: it now only contains the lpar
60 * bit. The actual platform number is dead and burried
61 */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +110062 __u32 platform; /* Platform flags 0x18 */
63 __u32 processor; /* Processor type 0x1C */
64 __u64 processorCount; /* # of physical processors 0x20 */
65 __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
66 __u64 tb_orig_stamp; /* Timebase at boot 0x30 */
67 __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
68 __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
69 __u64 stamp_xsec; /* 0x48 */
70 __u64 tb_update_count; /* Timebase atomicity ctr 0x50 */
71 __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
72 __u32 tz_dsttime; /* Type of dst correction 0x5C */
73 __u32 dcache_size; /* L1 d-cache size 0x60 */
74 __u32 dcache_line_size; /* L1 d-cache line size 0x64 */
75 __u32 icache_size; /* L1 i-cache size 0x68 */
76 __u32 icache_line_size; /* L1 i-cache line size 0x6C */
77
78 /* those additional ones don't have to be located anywhere
79 * special as they were not part of the original systemcfg
80 */
Olof Johanssonfbe48172007-11-20 12:24:45 +110081 __u32 dcache_block_size; /* L1 d-cache block size */
82 __u32 icache_block_size; /* L1 i-cache block size */
83 __u32 dcache_log_block_size; /* L1 d-cache log block size */
84 __u32 icache_log_block_size; /* L1 i-cache log block size */
Benjamin Herrenschmidt0c37ec22005-11-14 14:55:58 +110085 __s32 wtom_clock_sec; /* Wall to monotonic clock */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +110086 __s32 wtom_clock_nsec;
Paul Mackerras597bc5c2008-10-27 23:56:03 +000087 struct timespec stamp_xtime; /* xtime as at tb_orig_stamp */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +110088 __u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */
89 __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
90};
91
92#else /* CONFIG_PPC64 */
93
94/*
95 * And here is the simpler 32 bits version
96 */
97struct vdso_data {
98 __u64 tb_orig_stamp; /* Timebase at boot 0x30 */
99 __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */
100 __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */
101 __u64 stamp_xsec; /* 0x48 */
102 __u32 tb_update_count; /* Timebase atomicity ctr 0x50 */
103 __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */
104 __u32 tz_dsttime; /* Type of dst correction 0x5C */
105 __s32 wtom_clock_sec; /* Wall to monotonic clock */
106 __s32 wtom_clock_nsec;
Paul Mackerras597bc5c2008-10-27 23:56:03 +0000107 struct timespec stamp_xtime; /* xtime as at tb_orig_stamp */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100108 __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
Olof Johanssonfbe48172007-11-20 12:24:45 +1100109 __u32 dcache_block_size; /* L1 d-cache block size */
110 __u32 icache_block_size; /* L1 i-cache block size */
111 __u32 dcache_log_block_size; /* L1 d-cache log block size */
112 __u32 icache_log_block_size; /* L1 i-cache log block size */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100113};
114
115#endif /* CONFIG_PPC64 */
116
117#ifdef __KERNEL__
118extern struct vdso_data *vdso_data;
119#endif
120
121#endif /* __ASSEMBLY__ */
122
Arnd Bergmann88ced032005-12-16 22:43:46 +0100123#endif /* __KERNEL__ */
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +1100124#endif /* _SYSTEMCFG_H */