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Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef _VDSO_DATAPAGE_H
3#define _VDSO_DATAPAGE_H
4#ifdef __KERNEL__
5
6/*
7 * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
8 * Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
9 * IBM Corp.
10 */
11
12#ifndef __ASSEMBLY__
13
14#include <linux/unistd.h>
15#include <linux/time.h>
16#include <vdso/datapage.h>
17
18#define SYSCALL_MAP_SIZE ((NR_syscalls + 31) / 32)
19
20#ifdef CONFIG_PPC64
21
22struct vdso_arch_data {
23 __u64 tb_ticks_per_sec; /* Timebase tics / sec */
24 __u32 dcache_block_size; /* L1 d-cache block size */
25 __u32 icache_block_size; /* L1 i-cache block size */
26 __u32 dcache_log_block_size; /* L1 d-cache log block size */
27 __u32 icache_log_block_size; /* L1 i-cache log block size */
28 __u32 syscall_map[SYSCALL_MAP_SIZE]; /* Map of syscalls */
29 __u32 compat_syscall_map[SYSCALL_MAP_SIZE]; /* Map of compat syscalls */
30
31 struct vdso_rng_data rng_data;
32
33 struct vdso_data data[CS_BASES] __aligned(1 << CONFIG_PAGE_SHIFT);
34};
35
36#else /* CONFIG_PPC64 */
37
38struct vdso_arch_data {
39 __u64 tb_ticks_per_sec; /* Timebase tics / sec */
40 __u32 syscall_map[SYSCALL_MAP_SIZE]; /* Map of syscalls */
41 __u32 compat_syscall_map[0]; /* No compat syscalls on PPC32 */
42 struct vdso_rng_data rng_data;
43
44 struct vdso_data data[CS_BASES] __aligned(1 << CONFIG_PAGE_SHIFT);
45};
46
47#endif /* CONFIG_PPC64 */
48
49extern struct vdso_arch_data *vdso_data;
50
51#else /* __ASSEMBLY__ */
52
53.macro get_datapage ptr offset=0
54 bcl 20, 31, .+4
55999:
56 mflr \ptr
57 addis \ptr, \ptr, (_vdso_datapage - 999b + \offset)@ha
58 addi \ptr, \ptr, (_vdso_datapage - 999b + \offset)@l
59.endm
60
61#include <asm/asm-offsets.h>
62#include <asm/page.h>
63
64#endif /* __ASSEMBLY__ */
65
66#endif /* __KERNEL__ */
67#endif /* _SYSTEMCFG_H */