src/system/boot/arch/m68k/mmu.h

   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()
  13 static const uint32 kDefaultPageFlags = 0x3;    // present, R/W
  14
  15 #ifdef __cplusplus
  16 extern "C" {
  17 #endif
  18
  19 extern void mmu_init(void);
  20 extern void mmu_init_for_kernel(void);
  21 extern addr_t mmu_map_physical_memory(addr_t physicalAddress, size_t size, uint32 flags);
  22 extern void *mmu_allocate(void *virtualAddress, size_t size);
  23 extern void mmu_free(void *virtualAddress, size_t size);
  24
  25 extern addr_t mmu_get_next_page_tables();
  26
  27
  28 struct 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
  41 extern const struct boot_mmu_ops k030MMUOps;
  42 extern const struct boot_mmu_ops k040MMUOps;
  43 extern const struct boot_mmu_ops k060MMUOps;
  44
  45
  46
  47
  48 #ifdef __cplusplus
  49 }
  50 #endif
  51
  52 #endif  /* MMU_H */