/* SPDX-License-Identifier: GPL-2.0 */ // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_MMU_CONTEXT_H #define __ASM_CSKY_MMU_CONTEXT_H #include <asm-generic/mm_hooks.h> #include <asm/setup.h> #include <asm/page.h> #include <asm/cacheflush.h> #include <asm/tlbflush.h> #include <linux/errno.h> #include <linux/sched.h> #include <abi/ckmmu.h> #define TLBMISS_HANDLER_SETUP_PGD(pgd) \ setup_pgd(__pa(pgd), false) #define TLBMISS_HANDLER_SETUP_PGD_KERNEL(pgd) \ setup_pgd(__pa(pgd), true) #define ASID_MASK ((1 << CONFIG_CPU_ASID_BITS) - 1) #define cpu_asid(mm) (atomic64_read(&mm->context.asid) & ASID_MASK) #define init_new_context(tsk,mm) ({ atomic64_set(&(mm)->context.asid, 0); 0; }) #define activate_mm(prev,next) switch_mm(prev, next, current) #define destroy_context(mm) do {} while (0) #define enter_lazy_tlb(mm, tsk) do {} while (0) #define deactivate_mm(tsk, mm) do {} while (0) void check_and_switch_context(struct mm_struct *mm, unsigned int cpu); static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { unsigned int cpu = smp_processor_id(); if (prev != next) check_and_switch_context(next, cpu); TLBMISS_HANDLER_SETUP_PGD(next->pgd); write_mmu_entryhi(next->context.asid.counter); } #endif /* __ASM_CSKY_MMU_CONTEXT_H */