3 * COPYRIGHT: See COPYING in the top directory
4 * PROJECT: ReactOS kernel
5 * FILE: ntoskrnl/mm/mminit.c
6 * PURPOSE: kernel memory managment initialization functions
7 * PROGRAMMER: David Welch (welch@cwcom.net)
12 /* INCLUDES *****************************************************************/
14 #include <ddk/ntddk.h>
16 #include <internal/i386/segment.h>
17 #include <internal/mm.h>
18 #include <internal/ntoskrnl.h>
19 #include <internal/io.h>
20 #include <internal/ps.h>
21 #include <internal/pool.h>
24 #include <internal/debug.h>
26 /* GLOBALS *****************************************************************/
29 * Size of extended memory (kb) (fixed for now)
31 #define EXTENDED_MEMORY_SIZE (3*1024*1024)
34 * Compiler defined symbols
36 extern unsigned int _text_start__;
37 extern unsigned int _text_end__;
39 static BOOLEAN IsThisAnNtAsSystem = FALSE;
40 static MM_SYSTEM_SIZE MmSystemSize = MmSmallSystem;
42 extern unsigned int _bss_end__;
44 static MEMORY_AREA* kernel_text_desc = NULL;
45 static MEMORY_AREA* kernel_data_desc = NULL;
46 static MEMORY_AREA* kernel_param_desc = NULL;
47 static MEMORY_AREA* kernel_pool_desc = NULL;
48 static MEMORY_AREA* kernel_shared_data_desc = NULL;
49 static MEMORY_AREA* MiPagedPoolDescriptor = NULL;
51 PHYSICAL_ADDRESS MmSharedDataPagePhysicalAddress;
53 /* FUNCTIONS ****************************************************************/
55 BOOLEAN STDCALL MmIsThisAnNtAsSystem(VOID)
57 return(IsThisAnNtAsSystem);
60 MM_SYSTEM_SIZE STDCALL MmQuerySystemSize(VOID)
65 VOID MiShutdownMemoryManager(VOID)
69 VOID MmInitVirtualMemory(ULONG LastKernelAddress,
72 * FUNCTION: Intialize the memory areas list
74 * bp = Pointer to the boot parameters
75 * kernel_len = Length of the kernel
80 ULONG ParamLength = KernelLength;
84 DPRINT("MmInitVirtualMemory(%x, %x)\n",LastKernelAddress, KernelLength);
86 LastKernelAddress = PAGE_ROUND_UP(LastKernelAddress);
89 ExInitNonPagedPool(LastKernelAddress + PAGE_SIZE);
92 * Setup the system area descriptor list
94 BaseAddress = (PVOID)KERNEL_BASE;
95 Length = PAGE_ROUND_UP(((ULONG)&_text_end__)) - KERNEL_BASE;
96 ParamLength = ParamLength - Length;
99 * No need to lock the address space at this point since no
100 * other threads are running.
102 MmCreateMemoryArea(NULL,
103 MmGetKernelAddressSpace(),
111 Length = PAGE_ROUND_UP(((ULONG)&_bss_end__)) -
112 PAGE_ROUND_UP(((ULONG)&_text_end__));
113 ParamLength = ParamLength - Length;
114 DPRINT("Length %x\n",Length);
115 BaseAddress = (PVOID)PAGE_ROUND_UP(((ULONG)&_text_end__));
116 DPRINT("BaseAddress %x\n",BaseAddress);
119 * No need to lock the address space at this point since we are
120 * the only thread running.
122 MmCreateMemoryArea(NULL,
123 MmGetKernelAddressSpace(),
131 BaseAddress = (PVOID)PAGE_ROUND_UP(((ULONG)&_bss_end__));
132 // Length = ParamLength;
133 Length = LastKernelAddress - (ULONG)BaseAddress;
134 MmCreateMemoryArea(NULL,
135 MmGetKernelAddressSpace(),
143 BaseAddress = (PVOID)(LastKernelAddress + PAGE_SIZE);
144 Length = NONPAGED_POOL_SIZE;
145 MmCreateMemoryArea(NULL,
146 MmGetKernelAddressSpace(),
154 MmPagedPoolSize = MM_PAGED_POOL_SIZE;
155 BaseAddress = (PVOID)(LastKernelAddress + PAGE_SIZE + NONPAGED_POOL_SIZE +
157 MmPagedPoolBase = BaseAddress;
158 Length = MM_PAGED_POOL_SIZE;
159 MmCreateMemoryArea(NULL,
160 MmGetKernelAddressSpace(),
161 MEMORY_AREA_PAGED_POOL,
165 &MiPagedPoolDescriptor,
167 MmInitializePagedPool();
170 * Create the kernel mapping of the user/kernel shared memory.
172 BaseAddress = (PVOID)KI_USER_SHARED_DATA;
174 MmCreateMemoryArea(NULL,
175 MmGetKernelAddressSpace(),
180 &kernel_shared_data_desc,
182 Status = MmRequestPageMemoryConsumer(MC_NPPOOL, TRUE,
183 &MmSharedDataPagePhysicalAddress);
184 Status = MmCreateVirtualMapping(NULL,
185 (PVOID)KI_USER_SHARED_DATA,
187 MmSharedDataPagePhysicalAddress,
189 if (!NT_SUCCESS(Status))
191 DbgPrint("Unable to create virtual mapping\n");
194 RtlZeroMemory(BaseAddress, Length);
199 MmInitializeMemoryConsumer(MC_USER, MmTrimUserMemory);
202 VOID MmInit1(ULONG FirstKrnlPhysAddr,
203 ULONG LastKrnlPhysAddr,
204 ULONG LastKernelAddress,
205 PADDRESS_RANGE BIOSMemoryMap,
206 ULONG AddressRangeCount)
208 * FUNCTION: Initalize memory managment
214 extern unsigned int unmap_me, unmap_me2, unmap_me3;
217 DPRINT("MmInit1(FirstKrnlPhysAddr, %x, LastKrnlPhysAddr %x, LastKernelAddress %x)\n",
222 if ((BIOSMemoryMap != NULL) && (AddressRangeCount > 0))
224 // If we have a bios memory map, recalulate the the memory size
226 for (i = 0; i < AddressRangeCount; i++)
228 if (BIOSMemoryMap[i].Type == 1
229 && (BIOSMemoryMap[i].BaseAddrLow + BIOSMemoryMap[i].LengthLow + PAGE_SIZE -1) / PAGE_SIZE > last)
231 last = (BIOSMemoryMap[i].BaseAddrLow + BIOSMemoryMap[i].LengthLow + PAGE_SIZE -1) / PAGE_SIZE;
234 if ((last - 256) * 4 > KeLoaderBlock.MemHigher)
236 KeLoaderBlock.MemHigher = (last - 256) * 4;
241 * FIXME: Set this based on the system command line
243 MmUserProbeAddress = (PVOID)0x7fff0000;
244 MmHighestUserAddress = (PVOID)0x7ffeffff;
247 * Initialize memory managment statistics
249 MmStats.NrTotalPages = 0;
250 MmStats.NrSystemPages = 0;
251 MmStats.NrUserPages = 0;
252 MmStats.NrReservedPages = 0;
253 MmStats.NrUserPages = 0;
254 MmStats.NrFreePages = 0;
255 MmStats.NrLockedPages = 0;
256 MmStats.PagingRequestsInLastMinute = 0;
257 MmStats.PagingRequestsInLastFiveMinutes = 0;
258 MmStats.PagingRequestsInLastFifteenMinutes = 0;
261 * Initialize the kernel address space
263 MmInitializeKernelAddressSpace();
269 /* FIXME: This is broken in SMP mode */
270 MmDeletePageTable(NULL, 0);
273 * Free all pages not used for kernel memory
274 * (we assume the kernel occupies a continuous range of physical
277 DPRINT("first krnl %x\nlast krnl %x\n",FirstKrnlPhysAddr,
281 * Free physical memory not used by the kernel
283 MmStats.NrTotalPages = KeLoaderBlock.MemHigher/4;
284 if (!MmStats.NrTotalPages)
286 DbgPrint("Memory not detected, default to 8 MB\n");
287 MmStats.NrTotalPages = 2048;
291 /* add 1MB for standard memory (not extended) */
292 MmStats.NrTotalPages += 256;
295 MmStats.NrTotalPages += 16;
297 DbgPrint("Used memory %dKb\n", (MmStats.NrTotalPages * PAGE_SIZE) / 1024);
299 LastKernelAddress = (ULONG)MmInitializePageList(
300 (PVOID)FirstKrnlPhysAddr,
301 (PVOID)LastKrnlPhysAddr,
302 MmStats.NrTotalPages,
303 PAGE_ROUND_UP(LastKernelAddress),
306 kernel_len = LastKrnlPhysAddr - FirstKrnlPhysAddr;
309 * Create a trap for null pointer references and protect text
313 DPRINT("_text_start__ %x _text_end__ %x\n",(int)&_text_start__,(int)&_text_end__);
314 for (i=PAGE_ROUND_UP(((int)&_text_start__));
315 i<PAGE_ROUND_DOWN(((int)&_text_end__));i=i+PAGE_SIZE)
317 MmSetPageProtect(NULL,
322 DPRINT("Invalidating between %x and %x\n",
324 KERNEL_BASE + 2 * PAGE_TABLE_SIZE);
325 for (i=(LastKernelAddress);
326 i<(KERNEL_BASE + 2 * PAGE_TABLE_SIZE);
329 MmDeleteVirtualMapping(NULL, (PVOID)(i), FALSE, NULL, NULL);
331 DPRINT("Almost done MmInit()\n");
333 /* FIXME: This is broken in SMP mode */
334 MmDeleteVirtualMapping(NULL, (PVOID)&unmap_me, FALSE, NULL, NULL);
335 MmDeleteVirtualMapping(NULL, (PVOID)&unmap_me2, FALSE, NULL, NULL);
336 MmDeleteVirtualMapping(NULL, (PVOID)&unmap_me3, FALSE, NULL, NULL);
339 * Intialize memory areas
341 MmInitVirtualMemory(LastKernelAddress, kernel_len);
343 MmInitializeMdlImplementation();
348 MmInitSectionImplementation();
355 MmCreatePhysicalMemorySection();
356 MmInitializeRmapList();
359 * Initialise the modified page writer.
363 /* FIXME: Read parameters from memory */