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author | Al Viro <viro@zeniv.linux.org.uk> | 2008-08-18 03:05:42 +0200 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-10-23 07:55:20 +0200 |
commit | bb8985586b7a906e116db835c64773b7a7d51663 (patch) | |
tree | de93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/vsyscall.h | |
parent | x86, um: initial part of asm-um move (diff) | |
download | linux-bb8985586b7a906e116db835c64773b7a7d51663.tar.xz linux-bb8985586b7a906e116db835c64773b7a7d51663.zip |
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/vsyscall.h')
-rw-r--r-- | arch/x86/include/asm/vsyscall.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h new file mode 100644 index 000000000000..dcd4682413de --- /dev/null +++ b/arch/x86/include/asm/vsyscall.h @@ -0,0 +1,44 @@ +#ifndef ASM_X86__VSYSCALL_H +#define ASM_X86__VSYSCALL_H + +enum vsyscall_num { + __NR_vgettimeofday, + __NR_vtime, + __NR_vgetcpu, +}; + +#define VSYSCALL_START (-10UL << 20) +#define VSYSCALL_SIZE 1024 +#define VSYSCALL_END (-2UL << 20) +#define VSYSCALL_MAPPED_PAGES 1 +#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) + +#ifdef __KERNEL__ +#include <linux/seqlock.h> + +#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16))) +#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16))) + +/* Definitions for CONFIG_GENERIC_TIME definitions */ +#define __section_vsyscall_gtod_data __attribute__ \ + ((unused, __section__ (".vsyscall_gtod_data"),aligned(16))) +#define __section_vsyscall_clock __attribute__ \ + ((unused, __section__ (".vsyscall_clock"),aligned(16))) +#define __vsyscall_fn \ + __attribute__ ((unused, __section__(".vsyscall_fn"))) notrace + +#define VGETCPU_RDTSCP 1 +#define VGETCPU_LSL 2 + +extern int __vgetcpu_mode; +extern volatile unsigned long __jiffies; + +/* kernel space (writeable) */ +extern int vgetcpu_mode; +extern struct timezone sys_tz; + +extern void map_vsyscall(void); + +#endif /* __KERNEL__ */ + +#endif /* ASM_X86__VSYSCALL_H */ |