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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
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/*
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* Copyright (C) 2012 Regents of the University of California
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _ASM_RISCV_MMU_CONTEXT_H
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#define _ASM_RISCV_MMU_CONTEXT_H
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#include <asm-generic/mm_hooks.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <asm/tlbflush.h>
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static inline void enter_lazy_tlb(struct mm_struct *mm,
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struct task_struct *task)
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{
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}
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/* Initialize context-related info for a new mm_struct */
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static inline int init_new_context(struct task_struct *task,
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struct mm_struct *mm)
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{
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return 0;
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}
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static inline void destroy_context(struct mm_struct *mm)
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{
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}
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static inline pgd_t *current_pgdir(void)
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{
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return pfn_to_virt(csr_read(sptbr) & SPTBR_PPN);
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}
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static inline void set_pgdir(pgd_t *pgd)
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{
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csr_write(sptbr, virt_to_pfn(pgd) | SPTBR_MODE);
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}
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static inline void switch_mm(struct mm_struct *prev,
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struct mm_struct *next, struct task_struct *task)
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{
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if (likely(prev != next)) {
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set_pgdir(next->pgd);
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local_flush_tlb_all();
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}
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}
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static inline void activate_mm(struct mm_struct *prev,
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struct mm_struct *next)
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{
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switch_mm(prev, next, NULL);
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}
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static inline void deactivate_mm(struct task_struct *task,
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struct mm_struct *mm)
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{
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}
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#endif /* _ASM_RISCV_MMU_CONTEXT_H */
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