| /* 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 */ |
