67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* MM context support for the Hexagon architecture
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*
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* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
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*/
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#ifndef _ASM_MMU_CONTEXT_H
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#define _ASM_MMU_CONTEXT_H
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#include <linux/mm_types.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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#include <asm/pgalloc.h>
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#include <asm/mem-layout.h>
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/*
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* VM port hides all TLB management, so "lazy TLB" isn't very
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* meaningful. Even for ports to architectures with visble TLBs,
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* this is almost invariably a null function.
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*
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* mm->context is set up by pgd_alloc, so no init_new_context required.
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*/
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/*
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* Switch active mm context
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*/
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static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
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struct task_struct *tsk)
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{
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int l1;
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/*
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* For virtual machine, we have to update system map if it's been
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* touched.
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*/
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if (next->context.generation < prev->context.generation) {
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for (l1 = MIN_KERNEL_SEG; l1 <= max_kernel_seg; l1++)
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next->pgd[l1] = init_mm.pgd[l1];
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next->context.generation = prev->context.generation;
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}
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__vmnewmap((void *)next->context.ptbase);
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}
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/*
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* Activate new memory map for task
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*/
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#define activate_mm activate_mm
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static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
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{
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unsigned long flags;
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local_irq_save(flags);
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switch_mm(prev, next, current_thread_info()->task);
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local_irq_restore(flags);
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}
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/* Generic hooks for arch_dup_mmap and arch_exit_mmap */
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#include <asm-generic/mm_hooks.h>
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#include <asm-generic/mmu_context.h>
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#endif
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