Viewing file:  mmu_context.h (1.31 KB) -rw-r--r--
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/* 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 */
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