/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Author: Huacai Chen <chenhuacai@loongson.cn> * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */ #ifndef __ASSEMBLY__ #include <asm/asm.h> #include <asm/page.h> #include <asm/vdso.h> struct vdso_pcpu_data { u32 node; } ____cacheline_aligned_in_smp; struct loongarch_vdso_data { struct vdso_pcpu_data pdata[NR_CPUS]; }; /* * The layout of vvar: * * high * +---------------------+--------------------------+ * | loongarch vdso data | LOONGARCH_VDSO_DATA_SIZE | * +---------------------+--------------------------+ * | time-ns vdso data | PAGE_SIZE | * +---------------------+--------------------------+ * | generic vdso data | PAGE_SIZE | * +---------------------+--------------------------+ * low */ #define LOONGARCH_VDSO_DATA_SIZE PAGE_ALIGN(sizeof(struct loongarch_vdso_data)) #define LOONGARCH_VDSO_DATA_PAGES (LOONGARCH_VDSO_DATA_SIZE >> PAGE_SHIFT) enum vvar_pages { VVAR_GENERIC_PAGE_OFFSET, VVAR_TIMENS_PAGE_OFFSET, VVAR_LOONGARCH_PAGES_START, VVAR_LOONGARCH_PAGES_END = VVAR_LOONGARCH_PAGES_START + LOONGARCH_VDSO_DATA_PAGES - 1, VVAR_NR_PAGES, }; #define VVAR_SIZE (VVAR_NR_PAGES << PAGE_SHIFT) static inline unsigned long get_vdso_base(void) { unsigned long addr; __asm__( " la.pcrel %0, _start\n" : "=r" (addr) : :); return addr; } static inline unsigned long get_vdso_data(void) { return get_vdso_base() - VVAR_SIZE; } #endif /* __ASSEMBLY__ */