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-rw-r--r--arch/tile/include/asm/vdso.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/tile/include/asm/vdso.h b/arch/tile/include/asm/vdso.h
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+++ b/arch/tile/include/asm/vdso.h
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+/*
+ * Copyright 2012 Tilera Corporation. All Rights Reserved.
+ *
+ * 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, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __TILE_VDSO_H__
+#define __TILE_VDSO_H__
+
+#include <linux/seqlock.h>
+#include <linux/types.h>
+
+/*
+ * Note about the vdso_data structure:
+ *
+ * NEVER USE THEM IN USERSPACE CODE DIRECTLY. The layout of the
+ * structure is supposed to be known only to the function in the vdso
+ * itself and may change without notice.
+ */
+
+struct vdso_data {
+ seqcount_t tz_seq; /* Timezone seqlock */
+ seqcount_t tb_seq; /* Timebase seqlock */
+ __u64 cycle_last; /* TOD clock for xtime */
+ __u64 mask; /* Cycle mask */
+ __u32 mult; /* Cycle to nanosecond multiplier */
+ __u32 shift; /* Cycle to nanosecond divisor (power of two) */
+ __u64 wall_time_sec;
+ __u64 wall_time_snsec;
+ __u64 monotonic_time_sec;
+ __u64 monotonic_time_snsec;
+ __u64 wall_time_coarse_sec;
+ __u64 wall_time_coarse_nsec;
+ __u64 monotonic_time_coarse_sec;
+ __u64 monotonic_time_coarse_nsec;
+ __u32 tz_minuteswest; /* Minutes west of Greenwich */
+ __u32 tz_dsttime; /* Type of dst correction */
+};
+
+extern struct vdso_data *vdso_data;
+
+/* __vdso_rt_sigreturn is defined with the addresses in the vdso page. */
+extern void __vdso_rt_sigreturn(void);
+
+extern int setup_vdso_pages(void);
+
+#endif /* __TILE_VDSO_H__ */