#ifndef _VDSO_DATAPAGE_H #define _VDSO_DATAPAGE_H #ifdef __KERNEL__ /* * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM * Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>, * IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ /* * Note about this structure: * * This structure was historically called systemcfg and exposed to * userland via /proc/ppc64/systemcfg. Unfortunately, this became an * ABI issue as some proprietary software started relying on being able * to mmap() it, thus we have to keep the base layout at least for a * few kernel versions. * * However, since ppc32 doesn't suffer from this backward handicap, * a simpler version of the data structure is used there with only the * fields actually used by the vDSO. * */ /* * If the major version changes we are incompatible. * Minor version changes are a hint. */ #define SYSTEMCFG_MAJOR 1 #define SYSTEMCFG_MINOR 1 #ifndef __ASSEMBLY__ #include <linux/unistd.h> #define SYSCALL_MAP_SIZE ((__NR_syscalls + 31) / 32) /* * So here is the ppc64 backward compatible version */ #ifdef CONFIG_PPC64 struct vdso_data { __u8 eye_catcher[16]; /* Eyecatcher: SYSTEMCFG:PPC64 0x00 */ struct { /* Systemcfg version numbers */ __u32 major; /* Major number 0x10 */ __u32 minor; /* Minor number 0x14 */ } version; __u32 platform; /* Platform flags 0x18 */ __u32 processor; /* Processor type 0x1C */ __u64 processorCount; /* # of physical processors 0x20 */ __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */ __u64 tb_orig_stamp; /* Timebase at boot 0x30 */ __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */ __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */ __u64 stamp_xsec; /* 0x48 */ __u64 tb_update_count; /* Timebase atomicity ctr 0x50 */ __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */ __u32 tz_dsttime; /* Type of dst correction 0x5C */ __u32 dcache_size; /* L1 d-cache size 0x60 */ __u32 dcache_line_size; /* L1 d-cache line size 0x64 */ __u32 icache_size; /* L1 i-cache size 0x68 */ __u32 icache_line_size; /* L1 i-cache line size 0x6C */ /* those additional ones don't have to be located anywhere * special as they were not part of the original systemcfg */ __s32 wtom_clock_sec; /* Wall to monotonic clock */ __s32 wtom_clock_nsec; __u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of syscalls */ __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */ }; #else /* CONFIG_PPC64 */ /* * And here is the simpler 32 bits version */ struct vdso_data { __u64 tb_orig_stamp; /* Timebase at boot 0x30 */ __u64 tb_ticks_per_sec; /* Timebase tics / sec 0x38 */ __u64 tb_to_xs; /* Inverse of TB to 2^20 0x40 */ __u64 stamp_xsec; /* 0x48 */ __u32 tb_update_count; /* Timebase atomicity ctr 0x50 */ __u32 tz_minuteswest; /* Minutes west of Greenwich 0x58 */ __u32 tz_dsttime; /* Type of dst correction 0x5C */ __s32 wtom_clock_sec; /* Wall to monotonic clock */ __s32 wtom_clock_nsec; __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */ }; #endif /* CONFIG_PPC64 */ #ifdef __KERNEL__ extern struct vdso_data *vdso_data; #endif #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _SYSTEMCFG_H */