| /* 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 */ |
