162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci#ifndef __ASM_CSKY_MMU_CONTEXT_H 462306a36Sopenharmony_ci#define __ASM_CSKY_MMU_CONTEXT_H 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci#include <asm-generic/mm_hooks.h> 762306a36Sopenharmony_ci#include <asm/setup.h> 862306a36Sopenharmony_ci#include <asm/page.h> 962306a36Sopenharmony_ci#include <asm/cacheflush.h> 1062306a36Sopenharmony_ci#include <asm/tlbflush.h> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci#include <linux/errno.h> 1362306a36Sopenharmony_ci#include <linux/sched.h> 1462306a36Sopenharmony_ci#include <abi/ckmmu.h> 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#define ASID_MASK ((1 << CONFIG_CPU_ASID_BITS) - 1) 1762306a36Sopenharmony_ci#define cpu_asid(mm) (atomic64_read(&mm->context.asid) & ASID_MASK) 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci#define init_new_context(tsk,mm) ({ atomic64_set(&(mm)->context.asid, 0); 0; }) 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_civoid check_and_switch_context(struct mm_struct *mm, unsigned int cpu); 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_cistatic inline void 2462306a36Sopenharmony_ciswitch_mm(struct mm_struct *prev, struct mm_struct *next, 2562306a36Sopenharmony_ci struct task_struct *tsk) 2662306a36Sopenharmony_ci{ 2762306a36Sopenharmony_ci unsigned int cpu = smp_processor_id(); 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci if (prev != next) 3062306a36Sopenharmony_ci check_and_switch_context(next, cpu); 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci setup_pgd(next->pgd, next->context.asid.counter); 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci flush_icache_deferred(next); 3562306a36Sopenharmony_ci} 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci#include <asm-generic/mmu_context.h> 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci#endif /* __ASM_CSKY_MMU_CONTEXT_H */ 40