haiku.git

/*
 * Copyright 2008-2010, François Revol, revol@free.fr. All rights reserved.
 * Copyright 2004-2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef MMU_H
#define MMU_H


#include <SupportDefs.h>


// For use with mmu_map_physical_memory()
static const uint32 kDefaultPageFlags = 0x3;	// present, R/W

#ifdef __cplusplus
extern "C" {
#endif

extern void mmu_init(void);
extern void mmu_init_for_kernel(void);
extern addr_t mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags);
extern void *mmu_allocate(void *virtualAddress, size_t size);
extern void mmu_free(void *virtualAddress, size_t size);

extern addr_t mmu_get_next_page_tables();


struct boot_mmu_ops {
	void (*initialize)(void);
		/* len=0 to disable */
	status_t (*set_tt)(int which, addr_t pa, size_t len, uint32 perms);
		/* load root pointers */
	status_t (*load_rp)(addr_t pa);
	status_t (*allocate_kernel_pgdirs)(void);
	status_t (*enable_paging)(void);
	status_t (*add_page_table)(addr_t virtualAddress);
	void (*unmap_page)(addr_t virtualAddress);
	void (*map_page)(addr_t virtualAddress, addr_t pa, uint32 flags);
};

extern const struct boot_mmu_ops k030MMUOps;
extern const struct boot_mmu_ops k040MMUOps;
extern const struct boot_mmu_ops k060MMUOps;




#ifdef __cplusplus
}
#endif

#endif	/* MMU_H */