patch-2.4.20 linux-2.4.20/include/asm-x86_64/vsyscall.h

• Lines: 58
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/vsyscall.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/vsyscall.h linux-2.4.20/include/asm-x86_64/vsyscall.h
@@ -0,0 +1,57 @@
+#ifndef _ASM_X86_64_VSYSCALL_H_
+#define _ASM_X86_64_VSYSCALL_H_
+
+#include <linux/time.h>
+
+enum vsyscall_num {
+	__NR_vgettimeofday,
+	__NR_vtime,
+};
+
+#define VSYSCALL_START (-10UL << 20)
+#define VSYSCALL_SIZE 1024
+#define VSYSCALL_END (-2UL << 20)
+#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
+
+#ifdef __KERNEL__
+
+#define __section_hpet __attribute__ ((unused, __section__ (".hpet"), aligned(16)))
+#define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16)))
+#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
+#define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16)))
+#define __section_xtime __attribute__ ((unused, __section__ (".xtime"), aligned(16)))
+#define __section_vxtime_sequence __attribute__ ((unused, __section__ (".vxtime_sequence"), aligned(16)))
+
+struct hpet_data {
+	long address;		/* base address */
+	unsigned long hz;	/* HPET clocks / sec */
+	int trigger;		/* value at last interrupt */
+	int last;
+	int offset;
+	unsigned long last_tsc;
+	long ticks;
+};
+
+#define hpet_readl(a)           readl(fix_to_virt(FIX_HPET_BASE) + a)
+#define hpet_writel(d,a)        writel(d, fix_to_virt(FIX_HPET_BASE) + a)
+
+/* vsyscall space (readonly) */
+extern long __vxtime_sequence[2];
+extern struct hpet_data __hpet;
+extern struct timeval __xtime;
+extern volatile unsigned long __jiffies;
+extern unsigned long __wall_jiffies;
+extern struct timezone __sys_tz;
+
+/* kernel space (writeable) */
+extern long vxtime_sequence[2];
+extern struct hpet_data hpet;
+extern unsigned long wall_jiffies;
+extern struct timezone sys_tz;
+
+#define vxtime_lock() do { vxtime_sequence[0]++; wmb(); } while(0)
+#define vxtime_unlock() do { wmb(); vxtime_sequence[1]++; } while (0)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_X86_64_VSYSCALL_H_ */