Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / powerpc / include / asm / vdso_datapage.h

diff --git a/kernel/arch/powerpc/include/asm/vdso_datapage.h b/kernel/arch/powerpc/include/asm/vdso_datapage.h
new file mode 100644 (file)
index 0000000..b73a819
--- /dev/null
+++ b/kernel/arch/powerpc/include/asm/vdso_datapage.h
@@ -0,0 +1,124 @@
+#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>
+#include <linux/time.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;
+
+       /* Note about the platform flags: it now only contains the lpar
+        * bit. The actual platform number is dead and buried
+        */
+       __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
+        */
+       __u32 dcache_block_size;                /* L1 d-cache block size     */
+       __u32 icache_block_size;                /* L1 i-cache block size     */
+       __u32 dcache_log_block_size;            /* L1 d-cache log block size */
+       __u32 icache_log_block_size;            /* L1 i-cache log block size */
+       __s32 wtom_clock_sec;                   /* Wall to monotonic clock */
+       __s32 wtom_clock_nsec;
+       struct timespec stamp_xtime;    /* xtime as at tb_orig_stamp */
+       __u32 stamp_sec_fraction;       /* fractional seconds of stamp_xtime */
+       __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;
+       struct timespec stamp_xtime;    /* xtime as at tb_orig_stamp */
+       __u32 stamp_sec_fraction;       /* fractional seconds of stamp_xtime */
+       __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of syscalls */
+       __u32 dcache_block_size;        /* L1 d-cache block size     */
+       __u32 icache_block_size;        /* L1 i-cache block size     */
+       __u32 dcache_log_block_size;    /* L1 d-cache log block size */
+       __u32 icache_log_block_size;    /* L1 i-cache log block size */
+};
+
+#endif /* CONFIG_PPC64 */
+
+extern struct vdso_data *vdso_data;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+#endif /* _SYSTEMCFG_H */