projects / linux-2.6 / blame
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1 | #ifndef _VDSO_DATAPAGE_H |
| 2 | #define _VDSO_DATAPAGE_H | |
| 88ced031 | 3 | #ifdef __KERNEL__ |
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4 | |
| 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> | |
| 42 | ||
| 43 | #define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32) | |
| 44 | ||
| 45 | /* | |
| 46 | * So here is the ppc64 backward compatible version | |
| 47 | */ | |
| 48 | ||
| 49 | #ifdef CONFIG_PPC64 | |
| 50 | ||
| 51 | struct vdso_data { | |
| 52 | __u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */ | |
| 53 | struct { /* Systemcfg version numbers */ | |
| 54 | __u32 major; /* Major number 0x10 */ | |
| 55 | __u32 minor; /* Minor number 0x14 */ | |
| 56 | } version; | |
| 57 | ||
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58 | /* Note about the platform flags: it now only contains the lpar |
| 59 | * bit. The actual platform number is dead and burried | |
| 60 | */ | |
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61 | __u32 platform; /* Platform flags 0x18 */ |
| 62 | __u32 processor; /* Processor type 0x1C */ | |
| 63 | __u64 processorCount; /* # of physical processors 0x20 */ | |
| 64 | __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */ | |
| 65 | __u64 tb_orig_stamp; /* Timebase at boot 0x30 */ | |
| 66 | __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */ | |
| 67 | __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */ | |
| 68 | __u64 stamp_xsec; /* 0x48 */ | |
| 69 | __u64 tb_update_count; /* Timebase atomicity ctr 0x50 */ | |
| 70 | __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */ | |
| 71 | __u32 tz_dsttime; /* Type of dst correction 0x5C */ | |
| 72 | __u32 dcache_size; /* L1 d-cache size 0x60 */ | |
| 73 | __u32 dcache_line_size; /* L1 d-cache line size 0x64 */ | |
| 74 | __u32 icache_size; /* L1 i-cache size 0x68 */ | |
| 75 | __u32 icache_line_size; /* L1 i-cache line size 0x6C */ | |
| 76 | ||
| 77 | /* those additional ones don't have to be located anywhere | |
| 78 | * special as they were not part of the original systemcfg | |
| 79 | */ | |
| fbe48175 OJ |
80 | __u32 dcache_block_size; /* L1 d-cache block size */ |
| 81 | __u32 icache_block_size; /* L1 i-cache block size */ | |
| 82 | __u32 dcache_log_block_size; /* L1 d-cache log block size */ | |
| 83 | __u32 icache_log_block_size; /* L1 i-cache log block size */ | |
| 0c37ec2a | 84 | __s32 wtom_clock_sec; /* Wall to monotonic clock */ |
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85 | __s32 wtom_clock_nsec; |
| 86 | __u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */ | |
| 87 | __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */ | |
| 88 | }; | |
| 89 | ||
| 90 | #else /* CONFIG_PPC64 */ | |
| 91 | ||
| 92 | /* | |
| 93 | * And here is the simpler 32 bits version | |
| 94 | */ | |
| 95 | struct vdso_data { | |
| 96 | __u64 tb_orig_stamp; /* Timebase at boot 0x30 */ | |
| 97 | __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */ | |
| 98 | __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */ | |
| 99 | __u64 stamp_xsec; /* 0x48 */ | |
| 100 | __u32 tb_update_count; /* Timebase atomicity ctr 0x50 */ | |
| 101 | __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */ | |
| 102 | __u32 tz_dsttime; /* Type of dst correction 0x5C */ | |
| 103 | __s32 wtom_clock_sec; /* Wall to monotonic clock */ | |
| 104 | __s32 wtom_clock_nsec; | |
| 105 | __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */ | |
| fbe48175 OJ |
106 | __u32 dcache_block_size; /* L1 d-cache block size */ |
| 107 | __u32 icache_block_size; /* L1 i-cache block size */ | |
| 108 | __u32 dcache_log_block_size; /* L1 d-cache log block size */ | |
| 109 | __u32 icache_log_block_size; /* L1 i-cache log block size */ | |
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110 | }; |
| 111 | ||
| 112 | #endif /* CONFIG_PPC64 */ | |
| 113 | ||
| 114 | #ifdef __KERNEL__ | |
| 115 | extern struct vdso_data *vdso_data; | |
| 116 | #endif | |
| 117 | ||
| 118 | #endif /* __ASSEMBLY__ */ | |
| 119 | ||
| 88ced031 | 120 | #endif /* __KERNEL__ */ |
| a7f290da | 121 | #endif /* _SYSTEMCFG_H */ |