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/* SPDX-License-Identifier: GPL-2.0-or-later */
#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.
*/
#ifndef __ASSEMBLY__
#include <linux/unistd.h>
#include <linux/time.h>
#include <vdso/datapage.h>
#define SYSCALL_MAP_SIZE ((NR_syscalls + 31) / 32)
#ifdef CONFIG_PPC64
struct vdso_arch_data {
__u64 tb_ticks_per_sec; /* Timebase tics / sec */
__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 */
__u32 syscall_map[SYSCALL_MAP_SIZE]; /* Map of syscalls */
__u32 compat_syscall_map[SYSCALL_MAP_SIZE]; /* Map of compat syscalls */
struct vdso_data data[CS_BASES];
struct vdso_rng_data rng_data;
};
#else /* CONFIG_PPC64 */
struct vdso_arch_data {
__u64 tb_ticks_per_sec; /* Timebase tics / sec */
__u32 syscall_map[SYSCALL_MAP_SIZE]; /* Map of syscalls */
__u32 compat_syscall_map[0]; /* No compat syscalls on PPC32 */
struct vdso_data data[CS_BASES];
struct vdso_rng_data rng_data;
};
#endif /* CONFIG_PPC64 */
extern struct vdso_arch_data *vdso_data;
#else /* __ASSEMBLY__ */
.macro get_datapage ptr
bcl 20, 31, .+4
999:
mflr \ptr
addis \ptr, \ptr, (_vdso_datapage - 999b)@ha
addi \ptr, \ptr, (_vdso_datapage - 999b)@l
.endm
#include <asm/asm-offsets.h>
#include <asm/page.h>
.macro get_realdatapage ptr scratch
get_datapage \ptr
#ifdef CONFIG_TIME_NS
lwz \scratch, VDSO_CLOCKMODE_OFFSET(\ptr)
xoris \scratch, \scratch, VDSO_CLOCKMODE_TIMENS@h
xori \scratch, \scratch, VDSO_CLOCKMODE_TIMENS@l
cntlzw \scratch, \scratch
rlwinm \scratch, \scratch, PAGE_SHIFT - 5, 1 << PAGE_SHIFT
add \ptr, \ptr, \scratch
#endif
.endm
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _SYSTEMCFG_H */
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