mmu.h 1.4 KB
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/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_MMU_H
#define __ASM_MMU_H

typedef struct {
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	atomic64_t	id;
	void		*vdso;
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	unsigned long	flags;
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} mm_context_t;

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/*
 * This macro is only used by the TLBI code, which cannot race with an
 * ASID change and therefore doesn't need to reload the counter using
 * atomic64_read.
 */
#define ASID(mm)	((mm)->context.id.counter & 0xffff)
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extern void paging_init(void);
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extern void bootmem_init(void);
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extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
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extern void init_mem_pgprot(void);
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extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
			       unsigned long virt, phys_addr_t size,
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			       pgprot_t prot, bool page_mappings_only);
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extern void *fixmap_remap_fdt(phys_addr_t dt_phys);
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extern void mark_linear_text_alias_ro(void);
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#endif