1/*
2 * Copyright 2004-2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
3 * Distributed under the terms of the MIT License.
4 */
5#ifndef MMU_H
6#define MMU_H
7
8
9#include <SupportDefs.h>
10
11
12// For use with mmu_map_physical_memory()
13static const uint32 kDefaultPageFlags = 0x3;	// present, R/W
14
15#ifdef __cplusplus
16extern "C" {
17#endif
18
19extern void mmu_init(void);
20extern void mmu_init_for_kernel(void);
21extern addr_t mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags);
22extern void *mmu_allocate(void *virtualAddress, size_t size);
23extern void mmu_free(void *virtualAddress, size_t size);
24
25extern addr_t mmu_get_next_page_tables();
26
27
28struct boot_mmu_ops {
29	void (*initialize)(void);
30		/* len=0 to disable */
31	status_t (*set_tt)(int which, addr_t pa, size_t len, uint32 perms);
32		/* load root pointers */
33	status_t (*load_rp)(addr_t pa);
34	status_t (*allocate_kernel_pgdirs)(void);
35	status_t (*enable_paging)(void);
36	status_t (*add_page_table)(addr_t virtualAddress);
37	void (*unmap_page)(addr_t virtualAddress);
38	void (*map_page)(addr_t virtualAddress, addr_t pa, uint32 flags);
39};
40
41extern const struct boot_mmu_ops k030MMUOps;
42extern const struct boot_mmu_ops k040MMUOps;
43extern const struct boot_mmu_ops k060MMUOps;
44
45
46
47
48#ifdef __cplusplus
49}
50#endif
51
52#endif	/* MMU_H */
53