3 * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 typedef struct _FREELDR_MEMORY_DESCRIPTOR
24 TYPE_OF_MEMORY MemoryType
;
27 } FREELDR_MEMORY_DESCRIPTOR
, *PFREELDR_MEMORY_DESCRIPTOR
;
30 #if defined(__i386__) || defined(_PPC_) || defined(_MIPS_) || defined(_ARM_)
32 #define MM_PAGE_SIZE 4096
33 #define MM_PAGE_MASK 0xFFF
34 #define MM_PAGE_SHIFT 12
35 #define MM_MAX_PAGE 0xFFFFF
37 #define MM_SIZE_TO_PAGES(a) \
38 ( ((a) >> MM_PAGE_SHIFT) + ((a) & MM_PAGE_MASK ? 1 : 0) )
40 #endif // defined __i386__ or _PPC_ or _MIPS_
44 #define MM_PAGE_SIZE 4096
45 #define MM_PAGE_MASK 0xFFF
46 #define MM_PAGE_SHIFT 12
47 // FIXME: freeldr implementation uses ULONG for page numbers
48 #define MM_MAX_PAGE 0xFFFFFFFFFFFFF
50 #define MM_SIZE_TO_PAGES(a) \
51 ( ((a) >> MM_PAGE_SHIFT) + ((a) & MM_PAGE_MASK ? 1 : 0) )
55 // HEAP and STACK size
56 #define HEAP_PAGES 0x400
57 #define STACK_PAGES 0x00
62 TYPE_OF_MEMORY PageAllocated
; // Type of allocated memory (LoaderFree if this memory is free)
63 PFN_NUMBER PageAllocationLength
; // Number of pages allocated (or zero if this isn't the first page in the chain)
64 } PAGE_LOOKUP_TABLE_ITEM
, *PPAGE_LOOKUP_TABLE_ITEM
;
68 // Define this to 1 if you want the entire contents
69 // of the memory allocation bitmap displayed
70 // when a chunk is allocated or freed
72 #define DUMP_MEM_MAP_ON_VERIFY 0
74 extern PVOID PageLookupTableAddress
;
75 extern PFN_NUMBER TotalPagesInLookupTable
;
76 extern PFN_NUMBER FreePagesInLookupTable
;
77 extern PFN_NUMBER LastFreePageHint
;
80 PCSTR
MmGetSystemMemoryMapTypeString(TYPE_OF_MEMORY Type
);
83 PFN_NUMBER
MmGetPageNumberFromAddress(PVOID Address
); // Returns the page number that contains a linear address
84 PFN_NUMBER
MmGetAddressablePageCountIncludingHoles(VOID
); // Returns the count of addressable pages from address zero including any memory holes and reserved memory regions
85 PVOID
MmFindLocationForPageLookupTable(PFN_NUMBER TotalPageCount
); // Returns the address for a memory chunk big enough to hold the page lookup table (starts search from end of memory)
86 VOID
MmInitPageLookupTable(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
); // Inits the page lookup table according to the memory types in the memory map
87 VOID
MmMarkPagesInLookupTable(PVOID PageLookupTable
, PFN_NUMBER StartPage
, PFN_NUMBER PageCount
, TYPE_OF_MEMORY PageAllocated
); // Marks the specified pages as allocated or free in the lookup table
88 VOID
MmAllocatePagesInLookupTable(PVOID PageLookupTable
, PFN_NUMBER StartPage
, PFN_NUMBER PageCount
, TYPE_OF_MEMORY MemoryType
); // Allocates the specified pages in the lookup table
89 PFN_NUMBER
MmCountFreePagesInLookupTable(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
); // Returns the number of free pages in the lookup table
90 PFN_NUMBER
MmFindAvailablePages(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
, PFN_NUMBER PagesNeeded
, BOOLEAN FromEnd
); // Returns the page number of the first available page range from the beginning or end of memory
91 PFN_NUMBER
MmFindAvailablePagesBeforePage(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
, PFN_NUMBER PagesNeeded
, PFN_NUMBER LastPage
); // Returns the page number of the first available page range before the specified page
92 VOID
MmUpdateLastFreePageHint(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
); // Sets the LastFreePageHint to the last usable page of memory
93 BOOLEAN
MmAreMemoryPagesAvailable(PVOID PageLookupTable
, PFN_NUMBER TotalPageCount
, PVOID PageAddress
, PFN_NUMBER PageCount
); // Returns TRUE if the specified pages of memory are available, otherwise FALSE
94 VOID
MmSetMemoryType(PVOID MemoryAddress
, SIZE_T MemorySize
, TYPE_OF_MEMORY NewType
); // Use with EXTREME caution!
96 PPAGE_LOOKUP_TABLE_ITEM
MmGetMemoryMap(PFN_NUMBER
*NoEntries
); // Returns a pointer to the memory mapping table and a number of entries in it
99 //BOOLEAN MmInitializeMemoryManager(ULONG LowMemoryStart, ULONG LowMemoryLength);
100 BOOLEAN
MmInitializeMemoryManager(VOID
);
101 VOID
MmInitializeHeap(PVOID PageLookupTable
);
102 PVOID
MmAllocateMemory(SIZE_T MemorySize
);
103 PVOID
MmAllocateMemoryWithType(SIZE_T MemorySize
, TYPE_OF_MEMORY MemoryType
);
104 VOID
MmFreeMemory(PVOID MemoryPointer
);
105 PVOID
MmAllocateMemoryAtAddress(SIZE_T MemorySize
, PVOID DesiredAddress
, TYPE_OF_MEMORY MemoryType
);
106 PVOID
MmAllocateHighestMemoryBelowAddress(SIZE_T MemorySize
, PVOID DesiredAddress
, TYPE_OF_MEMORY MemoryType
);
108 PVOID
MmHeapAlloc(SIZE_T MemorySize
);
109 VOID
MmHeapFree(PVOID MemoryPointer
);
112 extern PVOID FrLdrDefaultHeap
;
113 extern PVOID FrLdrTempHeap
;
118 TYPE_OF_MEMORY MemoryType
);
129 HeapCleanupAll(VOID
);