reactos/ntoskrnl/mm/mminit.c

   1 /* $Id: mminit.c,v 1.39 2002/09/07 15:13:00 chorns Exp $
   2  *
   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)
   8  * UPDATE HISTORY:
   9  *              Created 9/4/98
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ntoskrnl.h>
  15
  16 #define NDEBUG
  17 #include <internal/debug.h>
  18
  19
  20 /* GLOBALS *****************************************************************/
  21
  22 /*
  23  * Size of extended memory (kb) (fixed for now)
  24  */
  25 #define EXTENDED_MEMORY_SIZE  (3*1024*1024)
  26
  27 /*
  28  * Compiler defined symbols
  29  */
  30 extern unsigned int _text_start__;
  31 extern unsigned int _text_end__;
  32
  33 static BOOLEAN IsThisAnNtAsSystem = FALSE;
  34 static MM_SYSTEM_SIZE MmSystemSize = MmSmallSystem;
  35
  36 extern unsigned int _bss_end__;
  37
  38 static MEMORY_AREA* kernel_text_desc = NULL;
  39 static MEMORY_AREA* kernel_data_desc = NULL;
  40 static MEMORY_AREA* kernel_param_desc = NULL;
  41 static MEMORY_AREA* kernel_pool_desc = NULL;
  42 static MEMORY_AREA* kernel_shared_data_desc = NULL;
  43 static MEMORY_AREA* MiPagedPoolDescriptor = NULL;
  44
  45 PHYSICAL_ADDRESS MmSharedDataPagePhysicalAddress;
  46
  47 PVOID MiHighestUserAddress = NULL;
  48 PVOID * MmHighestUserAddress = &MiHighestUserAddress;
  49 ULONG MiUserProbeAddress = 0;
  50 ULONG * MmUserProbeAddress = &MiUserProbeAddress;
  51
  52
  53 /* FUNCTIONS ****************************************************************/
  54
  55 BOOLEAN STDCALL MmIsThisAnNtAsSystem(VOID)
  56 {
  57    return(IsThisAnNtAsSystem);
  58 }
  59
  60 MM_SYSTEM_SIZE STDCALL MmQuerySystemSize(VOID)
  61 {
  62    return(MmSystemSize);
  63 }
  64
  65 VOID MiShutdownMemoryManager(VOID)
  66 {
  67 }
  68
  69 VOID MmInitVirtualMemory(ULONG LastKernelAddress,
  70                          ULONG KernelLength)
  71 /*
  72  * FUNCTION: Intialize the memory areas list
  73  * ARGUMENTS:
  74  *           bp = Pointer to the boot parameters
  75  *           kernel_len = Length of the kernel
  76  */
  77 {
  78    PVOID BaseAddress;
  79    ULONG Length;
  80    ULONG ParamLength = KernelLength;
  81    NTSTATUS Status;
  82    //ULONG i;
  83
  84    DPRINT("MmInitVirtualMemory(%x, %x)\n",LastKernelAddress, KernelLength);
  85
  86    LastKernelAddress = PAGE_ROUND_UP(LastKernelAddress);
  87
  88    MmInitMemoryAreas();
  89    ExInitNonPagedPool(LastKernelAddress + PAGE_SIZE);
  90
  91    /*
  92     * Setup the system area descriptor list
  93     */
  94    BaseAddress = (PVOID)KERNEL_BASE;
  95    Length = PAGE_ROUND_UP(((ULONG)&_text_end__)) - KERNEL_BASE;
  96    ParamLength = ParamLength - Length;
  97
  98    /*
  99     * No need to lock the address space at this point since no
 100     * other threads are running.
 101     */
 102    MmCreateMemoryArea(NULL,
 103                       MmGetKernelAddressSpace(),
 104                       MEMORY_AREA_SYSTEM,
 105                       &BaseAddress,
 106                       Length,
 107                       0,
 108                       &kernel_text_desc,
 109                       FALSE);
 110
 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);
 117
 118    /*
 119     * No need to lock the address space at this point since we are
 120     * the only thread running.
 121     */
 122    MmCreateMemoryArea(NULL,
 123                       MmGetKernelAddressSpace(),
 124                       MEMORY_AREA_SYSTEM,
 125                       &BaseAddress,
 126                       Length,
 127                       0,
 128                       &kernel_data_desc,
 129                       FALSE);
 130
 131    BaseAddress = (PVOID)PAGE_ROUND_UP(((ULONG)&_bss_end__));
 132 //   Length = ParamLength;
 133    Length = LastKernelAddress - (ULONG)BaseAddress;
 134    MmCreateMemoryArea(NULL,
 135                       MmGetKernelAddressSpace(),
 136                       MEMORY_AREA_SYSTEM,
 137                       &BaseAddress,
 138                       Length,
 139                       0,
 140                       &kernel_param_desc,
 141                       FALSE);
 142
 143    BaseAddress = (PVOID)(LastKernelAddress + PAGE_SIZE);
 144    Length = NONPAGED_POOL_SIZE;
 145    MmCreateMemoryArea(NULL,
 146                       MmGetKernelAddressSpace(),
 147                       MEMORY_AREA_SYSTEM,
 148                       &BaseAddress,
 149                       Length,
 150                       0,
 151                       &kernel_pool_desc,
 152                       FALSE);
 153
 154    MmPagedPoolSize = MM_PAGED_POOL_SIZE;
 155    BaseAddress = (PVOID)(LastKernelAddress + PAGE_SIZE + NONPAGED_POOL_SIZE +
 156                          PAGE_SIZE);
 157    MmPagedPoolBase = BaseAddress;
 158    Length = MM_PAGED_POOL_SIZE;
 159    MmCreateMemoryArea(NULL,
 160                       MmGetKernelAddressSpace(),
 161                       MEMORY_AREA_PAGED_POOL,
 162                       &BaseAddress,
 163                       Length,
 164                       0,
 165                       &MiPagedPoolDescriptor,
 166                       FALSE);
 167    MmInitializePagedPool();
 168
 169    /*
 170     * Create the kernel mapping of the user/kernel shared memory.
 171     */
 172    BaseAddress = (PVOID)KI_USER_SHARED_DATA;
 173    Length = PAGE_SIZE;
 174    MmCreateMemoryArea(NULL,
 175                       MmGetKernelAddressSpace(),
 176                       MEMORY_AREA_SYSTEM,
 177                       &BaseAddress,
 178                       Length,
 179                       0,
 180                       &kernel_shared_data_desc,
 181                       FALSE);
 182    Status = MmRequestPageMemoryConsumer(MC_NPPOOL, TRUE,
 183                                         &MmSharedDataPagePhysicalAddress);
 184    Status = MmCreateVirtualMapping(NULL,
 185                                    (PVOID)KI_USER_SHARED_DATA,
 186                                    PAGE_READWRITE,
 187                                    MmSharedDataPagePhysicalAddress,
 188                                    TRUE);
 189    if (!NT_SUCCESS(Status))
 190      {
 191         DbgPrint("Unable to create virtual mapping\n");
 192         KeBugCheck(0);
 193      }
 194    RtlZeroMemory(BaseAddress, Length);
 195
 196    /*
 197     *
 198     */
 199    MmInitializeMemoryConsumer(MC_USER, MmTrimUserMemory);
 200 }
 201
 202 VOID MmInit1(ULONG FirstKrnlPhysAddr,
 203              ULONG LastKrnlPhysAddr,
 204              ULONG LastKernelAddress,
 205              PADDRESS_RANGE BIOSMemoryMap,
 206              ULONG AddressRangeCount)
 207 /*
 208  * FUNCTION: Initalize memory managment
 209  */
 210 {
 211    ULONG i;
 212    ULONG kernel_len;
 213 #ifndef MP
 214    extern unsigned int unmap_me, unmap_me2, unmap_me3;
 215 #endif
 216
 217    DPRINT("MmInit1(FirstKrnlPhysAddr, %x, LastKrnlPhysAddr %x, LastKernelAddress %x)\n",
 218                   FirstKrnlPhysAddr,
 219                   LastKrnlPhysAddr,
 220                   LastKernelAddress);
 221
 222    if ((BIOSMemoryMap != NULL) && (AddressRangeCount > 0))
 223      {
 224         // If we have a bios memory map, recalulate the the memory size
 225         ULONG last = 0;
 226         for (i = 0; i < AddressRangeCount; i++)
 227           {
 228             if (BIOSMemoryMap[i].Type == 1
 229                 && (BIOSMemoryMap[i].BaseAddrLow + BIOSMemoryMap[i].LengthLow + PAGE_SIZE -1) / PAGE_SIZE > last)
 230               {
 231                  last = (BIOSMemoryMap[i].BaseAddrLow + BIOSMemoryMap[i].LengthLow + PAGE_SIZE -1) / PAGE_SIZE;
 232               }
 233           }
 234         if ((last - 256) * 4 > KeLoaderBlock.MemHigher)
 235           {
 236              KeLoaderBlock.MemHigher = (last - 256) * 4;
 237           }
 238      }
 239
 240    /*
 241     * FIXME: Set this based on the system command line
 242     */
 243    MiUserProbeAddress = (ULONG)0x7fff0000;
 244    MiHighestUserAddress = (PVOID)0x7ffeffff;
 245
 246    /*
 247     * Initialize memory managment statistics
 248     */
 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;
 259
 260    /*
 261     * Initialize the kernel address space
 262     */
 263    MmInitializeKernelAddressSpace();
 264
 265    /*
 266     * Unmap low memory
 267     */
 268 #ifndef MP
 269    /* FIXME: This is broken in SMP mode */
 270    MmDeletePageTable(NULL, 0);
 271 #endif
 272    /*
 273     * Free all pages not used for kernel memory
 274     * (we assume the kernel occupies a continuous range of physical
 275     * memory)
 276     */
 277    DPRINT("first krnl %x\nlast krnl %x\n",FirstKrnlPhysAddr,
 278           LastKrnlPhysAddr);
 279
 280    /*
 281     * Free physical memory not used by the kernel
 282     */
 283    MmStats.NrTotalPages = KeLoaderBlock.MemHigher/4;
 284    if (!MmStats.NrTotalPages)
 285      {
 286        DbgPrint("Memory not detected, default to 8 MB\n");
 287        MmStats.NrTotalPages = 2048;
 288      }
 289    else
 290      {
 291        /* add 1MB for standard memory (not extended) */
 292        MmStats.NrTotalPages += 256;
 293      }
 294 #ifdef BIOS_MEM_FIX
 295   MmStats.NrTotalPages += 16;
 296 #endif
 297    DbgPrint("Used memory %dKb\n", (MmStats.NrTotalPages * PAGE_SIZE) / 1024);
 298
 299    LastKernelAddress = (ULONG)MmInitializePageList(
 300                                            (PVOID)FirstKrnlPhysAddr,
 301                                            (PVOID)LastKrnlPhysAddr,
 302                                            MmStats.NrTotalPages,
 303                                            PAGE_ROUND_UP(LastKernelAddress),
 304              BIOSMemoryMap,
 305              AddressRangeCount);
 306    kernel_len = LastKrnlPhysAddr - FirstKrnlPhysAddr;
 307
 308    /*
 309     * Create a trap for null pointer references and protect text
 310     * segment
 311     */
 312    CHECKPOINT;
 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)
 316      {
 317         MmSetPageProtect(NULL,
 318                          (PVOID)i,
 319                          PAGE_EXECUTE_READ);
 320    }
 321
 322    DPRINT("Invalidating between %x and %x\n",
 323           LastKernelAddress,
 324           KERNEL_BASE + 2 * PAGE_TABLE_SIZE);
 325    for (i=(LastKernelAddress);
 326          i<(KERNEL_BASE + 2 * PAGE_TABLE_SIZE);
 327          i=i+PAGE_SIZE)
 328      {
 329          MmDeleteVirtualMapping(NULL, (PVOID)(i), FALSE, NULL, NULL);
 330      }
 331    DPRINT("Almost done MmInit()\n");
 332 #ifndef MP
 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);
 337 #endif
 338    /*
 339     * Intialize memory areas
 340     */
 341    MmInitVirtualMemory(LastKernelAddress, kernel_len);
 342
 343    MmInitializeMdlImplementation();
 344 }
 345
 346 VOID MmInit2(VOID)
 347 {
 348    MmInitSectionImplementation();
 349    MmInitPagingFile();
 350 }
 351
 352 VOID MmInit3(VOID)
 353 {
 354    MmInitPagerThread();
 355    MmCreatePhysicalMemorySection();
 356    MmInitializeRmapList();
 357
 358    /*
 359     * Initialise the modified page writer.
 360     */
 361    MmInitMpwThread();
 362
 363    /* FIXME: Read parameters from memory */
 364 }
 365