2 * PROJECT: ReactOS Kernel
3 * LICENSE: BSD - See COPYING.ARM in the top level directory
4 * FILE: ntoskrnl/mm/ARM3/i386/init.c
5 * PURPOSE: ARM Memory Manager Initialization for x86
6 * PROGRAMMERS: ReactOS Portable Systems Group
9 /* INCLUDES *******************************************************************/
15 #line 15 "ARMĀ³::INIT:X86"
16 #define MODULE_INVOLVED_IN_ARM3
17 #include "../../ARM3/miarm.h"
19 /* GLOBALS ********************************************************************/
21 /* Template PTE and PDE for a kernel page */
22 MMPTE ValidKernelPde
= {.u
.Hard
.Valid
= 1, .u
.Hard
.Write
= 1, .u
.Hard
.Dirty
= 1, .u
.Hard
.Accessed
= 1};
23 MMPTE ValidKernelPte
= {.u
.Hard
.Valid
= 1, .u
.Hard
.Write
= 1, .u
.Hard
.Dirty
= 1, .u
.Hard
.Accessed
= 1};
25 /* PRIVATE FUNCTIONS **********************************************************/
29 MiComputeNonPagedPoolVa(IN ULONG FreePages
)
31 IN PFN_NUMBER PoolPages
;
33 /* Check if this is a machine with less than 256MB of RAM, and no overide */
34 if ((MmNumberOfPhysicalPages
<= MI_MIN_PAGES_FOR_NONPAGED_POOL_TUNING
) &&
35 !(MmSizeOfNonPagedPoolInBytes
))
37 /* Force the non paged pool to be 2MB so we can reduce RAM usage */
38 MmSizeOfNonPagedPoolInBytes
= 2 * _1MB
;
41 /* Hyperspace ends here */
42 MmHyperSpaceEnd
= (PVOID
)((ULONG_PTR
)MmSystemCacheWorkingSetList
- 1);
44 /* Check if the user gave a ridicuously large nonpaged pool RAM size */
45 if ((MmSizeOfNonPagedPoolInBytes
>> PAGE_SHIFT
) > (FreePages
* 7 / 8))
47 /* More than 7/8ths of RAM was dedicated to nonpaged pool, ignore! */
48 MmSizeOfNonPagedPoolInBytes
= 0;
51 /* Check if no registry setting was set, or if the setting was too low */
52 if (MmSizeOfNonPagedPoolInBytes
< MmMinimumNonPagedPoolSize
)
54 /* Start with the minimum (256 KB) and add 32 KB for each MB above 4 */
55 MmSizeOfNonPagedPoolInBytes
= MmMinimumNonPagedPoolSize
;
56 MmSizeOfNonPagedPoolInBytes
+= (FreePages
- 1024) / 256 * MmMinAdditionNonPagedPoolPerMb
;
59 /* Check if the registy setting or our dynamic calculation was too high */
60 if (MmSizeOfNonPagedPoolInBytes
> MI_MAX_INIT_NONPAGED_POOL_SIZE
)
62 /* Set it to the maximum */
63 MmSizeOfNonPagedPoolInBytes
= MI_MAX_INIT_NONPAGED_POOL_SIZE
;
66 /* Check if a percentage cap was set through the registry */
67 if (MmMaximumNonPagedPoolPercent
) UNIMPLEMENTED
;
69 /* Page-align the nonpaged pool size */
70 MmSizeOfNonPagedPoolInBytes
&= ~(PAGE_SIZE
- 1);
72 /* Now, check if there was a registry size for the maximum size */
73 if (!MmMaximumNonPagedPoolInBytes
)
75 /* Start with the default (1MB) */
76 MmMaximumNonPagedPoolInBytes
= MmDefaultMaximumNonPagedPool
;
78 /* Add space for PFN database */
79 MmMaximumNonPagedPoolInBytes
+= (ULONG
)
80 PAGE_ALIGN((MmHighestPhysicalPage
+ 1) * sizeof(MMPFN
));
82 /* Check if the machine has more than 512MB of free RAM */
83 if (FreePages
>= 0x1F000)
85 /* Add 200KB for each MB above 4 */
86 MmMaximumNonPagedPoolInBytes
+= (FreePages
- 1024) / 256 *
87 (MmMaxAdditionNonPagedPoolPerMb
/ 2);
88 if (MmMaximumNonPagedPoolInBytes
< MI_MAX_NONPAGED_POOL_SIZE
)
90 /* Make it at least 128MB since this machine has a lot of RAM */
91 MmMaximumNonPagedPoolInBytes
= MI_MAX_NONPAGED_POOL_SIZE
;
96 /* Add 400KB for each MB above 4 */
97 MmMaximumNonPagedPoolInBytes
+= (FreePages
- 1024) / 256 *
98 MmMaxAdditionNonPagedPoolPerMb
;
102 /* Make sure there's at least 16 pages + the PFN available for expansion */
103 PoolPages
= MmSizeOfNonPagedPoolInBytes
+ (PAGE_SIZE
* 16) +
104 ((ULONG
)PAGE_ALIGN(MmHighestPhysicalPage
+ 1) * sizeof(MMPFN
));
105 if (MmMaximumNonPagedPoolInBytes
< PoolPages
)
107 /* The maximum should be at least high enough to cover all the above */
108 MmMaximumNonPagedPoolInBytes
= PoolPages
;
111 /* Systems with 2GB of kernel address space get double the size */
112 PoolPages
= MI_MAX_NONPAGED_POOL_SIZE
* 2;
114 /* On the other hand, make sure that PFN + nonpaged pool doesn't get too big */
115 if (MmMaximumNonPagedPoolInBytes
> PoolPages
)
117 /* Trim it down to the maximum architectural limit (256MB) */
118 MmMaximumNonPagedPoolInBytes
= PoolPages
;
121 /* Check if this is a system with > 128MB of non paged pool */
122 if (MmMaximumNonPagedPoolInBytes
> MI_MAX_NONPAGED_POOL_SIZE
)
124 /* Check if the initial size is less than the extra 128MB boost */
125 if (MmSizeOfNonPagedPoolInBytes
< (MmMaximumNonPagedPoolInBytes
-
126 MI_MAX_NONPAGED_POOL_SIZE
))
128 /* FIXME: Should check if the initial pool can be expanded */
130 /* Assume no expansion possible, check ift he maximum is too large */
131 if (MmMaximumNonPagedPoolInBytes
> (MmSizeOfNonPagedPoolInBytes
+
132 MI_MAX_NONPAGED_POOL_SIZE
))
134 /* Set it to the initial value plus the boost */
135 MmMaximumNonPagedPoolInBytes
= MmSizeOfNonPagedPoolInBytes
+
136 MI_MAX_NONPAGED_POOL_SIZE
;
144 MiInitMachineDependent(IN PLOADER_PARAMETER_BLOCK LoaderBlock
)
146 PLIST_ENTRY NextEntry
;
147 PMEMORY_ALLOCATION_DESCRIPTOR MdBlock
;
149 PFN_NUMBER PageFrameIndex
;
150 PMMPTE StartPde
, EndPde
, PointerPte
, LastPte
;
151 MMPTE TempPde
, TempPte
;
152 PVOID NonPagedPoolExpansionVa
;
156 /* Check for kernel stack size that's too big */
157 if (MmLargeStackSize
> (KERNEL_LARGE_STACK_SIZE
/ _1KB
))
159 /* Sanitize to default value */
160 MmLargeStackSize
= KERNEL_LARGE_STACK_SIZE
;
164 /* Take the registry setting, and convert it into bytes */
165 MmLargeStackSize
*= _1KB
;
167 /* Now align it to a page boundary */
168 MmLargeStackSize
= PAGE_ROUND_UP(MmLargeStackSize
);
171 ASSERT(MmLargeStackSize
<= KERNEL_LARGE_STACK_SIZE
);
172 ASSERT((MmLargeStackSize
& (PAGE_SIZE
- 1)) == 0);
174 /* Make sure it's not too low */
175 if (MmLargeStackSize
< KERNEL_STACK_SIZE
) MmLargeStackSize
= KERNEL_STACK_SIZE
;
178 /* Check for global bit */
180 if (KeFeatureBits
& KF_GLOBAL_PAGE
)
182 /* Set it on the template PTE and PDE */
183 ValidKernelPte
.u
.Hard
.Global
= TRUE
;
184 ValidKernelPde
.u
.Hard
.Global
= TRUE
;
187 /* Now templates are ready */
188 TempPte
= ValidKernelPte
;
189 TempPde
= ValidKernelPde
;
192 // Set CR3 for the system process
194 PointerPte
= MiAddressToPde(PTE_BASE
);
195 PageFrameIndex
= PFN_FROM_PTE(PointerPte
) << PAGE_SHIFT
;
196 PsGetCurrentProcess()->Pcb
.DirectoryTableBase
[0] = PageFrameIndex
;
199 // Blow away user-mode
201 StartPde
= MiAddressToPde(0);
202 EndPde
= MiAddressToPde(KSEG0_BASE
);
203 RtlZeroMemory(StartPde
, (EndPde
- StartPde
) * sizeof(MMPTE
));
206 // Loop the memory descriptors
208 NextEntry
= LoaderBlock
->MemoryDescriptorListHead
.Flink
;
209 while (NextEntry
!= &LoaderBlock
->MemoryDescriptorListHead
)
212 // Get the memory block
214 MdBlock
= CONTAINING_RECORD(NextEntry
,
215 MEMORY_ALLOCATION_DESCRIPTOR
,
219 // Skip invisible memory
221 if ((MdBlock
->MemoryType
!= LoaderFirmwarePermanent
) &&
222 (MdBlock
->MemoryType
!= LoaderSpecialMemory
) &&
223 (MdBlock
->MemoryType
!= LoaderHALCachedMemory
) &&
224 (MdBlock
->MemoryType
!= LoaderBBTMemory
))
227 // Check if BURNMEM was used
229 if (MdBlock
->MemoryType
!= LoaderBad
)
232 // Count this in the total of pages
234 MmNumberOfPhysicalPages
+= MdBlock
->PageCount
;
238 // Check if this is the new lowest page
240 if (MdBlock
->BasePage
< MmLowestPhysicalPage
)
243 // Update the lowest page
245 MmLowestPhysicalPage
= MdBlock
->BasePage
;
249 // Check if this is the new highest page
251 PageFrameIndex
= MdBlock
->BasePage
+ MdBlock
->PageCount
;
252 if (PageFrameIndex
> MmHighestPhysicalPage
)
255 // Update the highest page
257 MmHighestPhysicalPage
= PageFrameIndex
- 1;
261 // Check if this is free memory
263 if ((MdBlock
->MemoryType
== LoaderFree
) ||
264 (MdBlock
->MemoryType
== LoaderLoadedProgram
) ||
265 (MdBlock
->MemoryType
== LoaderFirmwareTemporary
) ||
266 (MdBlock
->MemoryType
== LoaderOsloaderStack
))
269 // Check if this is the largest memory descriptor
271 if (MdBlock
->PageCount
> FreePages
)
276 MxFreeDescriptor
= MdBlock
;
282 FreePages
+= MdBlock
->PageCount
;
289 NextEntry
= MdBlock
->ListEntry
.Flink
;
293 // Save original values of the free descriptor, since it'll be
294 // altered by early allocations
296 MxOldFreeDescriptor
= *MxFreeDescriptor
;
298 /* Compute non paged pool limits and size */
299 MiComputeNonPagedPoolVa(FreePages
);
301 /* Compute color information (L2 cache-separated paging lists) */
302 MiComputeColorInformation();
305 // Calculate the number of bytes for the PFN database, double it for ARM3,
306 // then add the color tables and convert to pages
308 MxPfnAllocation
= (MmHighestPhysicalPage
+ 1) * sizeof(MMPFN
);
309 //MxPfnAllocation <<= 1;
310 MxPfnAllocation
+= (MmSecondaryColors
* sizeof(MMCOLOR_TABLES
) * 2);
311 MxPfnAllocation
>>= PAGE_SHIFT
;
314 // We have to add one to the count here, because in the process of
315 // shifting down to the page size, we actually ended up getting the
316 // lower aligned size (so say, 0x5FFFF bytes is now 0x5F pages).
317 // Later on, we'll shift this number back into bytes, which would cause
318 // us to end up with only 0x5F000 bytes -- when we actually want to have
324 // Now calculate the nonpaged pool expansion VA region
326 MmNonPagedPoolStart
= (PVOID
)((ULONG_PTR
)MmNonPagedPoolEnd
-
327 MmMaximumNonPagedPoolInBytes
+
328 MmSizeOfNonPagedPoolInBytes
);
329 MmNonPagedPoolStart
= (PVOID
)PAGE_ALIGN(MmNonPagedPoolStart
);
330 NonPagedPoolExpansionVa
= MmNonPagedPoolStart
;
331 DPRINT("NP Pool has been tuned to: %d bytes and %d bytes\n",
332 MmSizeOfNonPagedPoolInBytes
, MmMaximumNonPagedPoolInBytes
);
335 // Now calculate the nonpaged system VA region, which includes the
336 // nonpaged pool expansion (above) and the system PTEs. Note that it is
337 // then aligned to a PDE boundary (4MB).
339 MmNonPagedSystemStart
= (PVOID
)((ULONG_PTR
)MmNonPagedPoolStart
-
340 (MmNumberOfSystemPtes
+ 1) * PAGE_SIZE
);
341 MmNonPagedSystemStart
= (PVOID
)((ULONG_PTR
)MmNonPagedSystemStart
&
342 ~(PDE_MAPPED_VA
- 1));
345 // Don't let it go below the minimum
347 if (MmNonPagedSystemStart
< (PVOID
)0xEB000000)
350 // This is a hard-coded limit in the Windows NT address space
352 MmNonPagedSystemStart
= (PVOID
)0xEB000000;
355 // Reduce the amount of system PTEs to reach this point
357 MmNumberOfSystemPtes
= ((ULONG_PTR
)MmNonPagedPoolStart
-
358 (ULONG_PTR
)MmNonPagedSystemStart
) >>
360 MmNumberOfSystemPtes
--;
361 ASSERT(MmNumberOfSystemPtes
> 1000);
365 // Check if we are in a situation where the size of the paged pool
366 // is so large that it overflows into nonpaged pool
368 if (MmSizeOfPagedPoolInBytes
>
369 ((ULONG_PTR
)MmNonPagedSystemStart
- (ULONG_PTR
)MmPagedPoolStart
))
372 // We need some recalculations here
374 DPRINT1("Paged pool is too big!\n");
378 // Normally, the PFN database should start after the loader images.
379 // This is already the case in ReactOS, but for now we want to co-exist
380 // with the old memory manager, so we'll create a "Shadow PFN Database"
381 // instead, and arbitrarly start it at 0xB0000000.
383 MmPfnDatabase
= (PVOID
)0xB0000000;
384 ASSERT(((ULONG_PTR
)MmPfnDatabase
& (PDE_MAPPED_VA
- 1)) == 0);
387 // Non paged pool comes after the PFN database
389 MmNonPagedPoolStart
= (PVOID
)((ULONG_PTR
)MmPfnDatabase
+
390 (MxPfnAllocation
<< PAGE_SHIFT
));
393 // Now we actually need to get these many physical pages. Nonpaged pool
394 // is actually also physically contiguous (but not the expansion)
396 PageFrameIndex
= MxGetNextPage(MxPfnAllocation
+
397 (MmSizeOfNonPagedPoolInBytes
>> PAGE_SHIFT
));
398 ASSERT(PageFrameIndex
!= 0);
399 DPRINT("PFN DB PA PFN begins at: %lx\n", PageFrameIndex
);
400 DPRINT("NP PA PFN begins at: %lx\n", PageFrameIndex
+ MxPfnAllocation
);
402 /* Convert nonpaged pool size from bytes to pages */
403 MmMaximumNonPagedPoolInPages
= MmMaximumNonPagedPoolInBytes
>> PAGE_SHIFT
;
406 // Now we need some pages to create the page tables for the NP system VA
407 // which includes system PTEs and expansion NP
409 StartPde
= MiAddressToPde(MmNonPagedSystemStart
);
410 EndPde
= MiAddressToPde((PVOID
)((ULONG_PTR
)MmNonPagedPoolEnd
- 1));
411 while (StartPde
<= EndPde
)
416 TempPde
.u
.Hard
.PageFrameNumber
= MxGetNextPage(1);
417 MI_WRITE_VALID_PTE(StartPde
, TempPde
);
420 // Zero out the page table
422 PointerPte
= MiPteToAddress(StartPde
);
423 RtlZeroMemory(PointerPte
, PAGE_SIZE
);
432 // Now we need pages for the page tables which will map initial NP
434 StartPde
= MiAddressToPde(MmPfnDatabase
);
435 EndPde
= MiAddressToPde((PVOID
)((ULONG_PTR
)MmNonPagedPoolStart
+
436 MmSizeOfNonPagedPoolInBytes
- 1));
437 while (StartPde
<= EndPde
)
442 TempPde
.u
.Hard
.PageFrameNumber
= MxGetNextPage(1);
443 MI_WRITE_VALID_PTE(StartPde
, TempPde
);
446 // Zero out the page table
448 PointerPte
= MiPteToAddress(StartPde
);
449 RtlZeroMemory(PointerPte
, PAGE_SIZE
);
458 // Now remember where the expansion starts
460 MmNonPagedPoolExpansionStart
= NonPagedPoolExpansionVa
;
463 // Last step is to actually map the nonpaged pool
465 PointerPte
= MiAddressToPte(MmNonPagedPoolStart
);
466 LastPte
= MiAddressToPte((PVOID
)((ULONG_PTR
)MmNonPagedPoolStart
+
467 MmSizeOfNonPagedPoolInBytes
- 1));
468 while (PointerPte
<= LastPte
)
471 // Use one of our contigous pages
473 TempPte
.u
.Hard
.PageFrameNumber
= PageFrameIndex
++;
474 MI_WRITE_VALID_PTE(PointerPte
++, TempPte
);
478 // Sanity check: make sure we have properly defined the system PTE space
480 ASSERT(MiAddressToPte(MmNonPagedSystemStart
) <
481 MiAddressToPte(MmNonPagedPoolExpansionStart
));
483 /* Now go ahead and initialize the nonpaged pool */
484 MiInitializeNonPagedPool();
485 MiInitializeNonPagedPoolThresholds();
487 /* Map the PFN database pages */
488 MiMapPfnDatabase(LoaderBlock
);
490 /* Initialize the color tables */
491 MiInitializeColorTables();
494 extern KEVENT ZeroPageThreadEvent
;
495 KeInitializeEvent(&ZeroPageThreadEvent
, NotificationEvent
, TRUE
);
497 /* Build the PFN Database */
498 MiInitializePfnDatabase(LoaderBlock
);
499 MmInitializeBalancer(MmAvailablePages
, 0);
502 // Reset the descriptor back so we can create the correct memory blocks
504 *MxFreeDescriptor
= MxOldFreeDescriptor
;
507 // Initialize the nonpaged pool
509 InitializePool(NonPagedPool
, 0);
512 // We PDE-aligned the nonpaged system start VA, so haul some extra PTEs!
514 PointerPte
= MiAddressToPte(MmNonPagedSystemStart
);
515 OldCount
= MmNumberOfSystemPtes
;
516 MmNumberOfSystemPtes
= MiAddressToPte(MmNonPagedPoolExpansionStart
) -
518 MmNumberOfSystemPtes
--;
519 DPRINT("Final System PTE count: %d (%d bytes)\n",
520 MmNumberOfSystemPtes
, MmNumberOfSystemPtes
* PAGE_SIZE
);
523 // Create the system PTE space
525 MiInitializeSystemPtes(PointerPte
, MmNumberOfSystemPtes
, SystemPteSpace
);
527 /* Get the PDE For hyperspace */
528 StartPde
= MiAddressToPde(HYPER_SPACE
);
530 /* Lock PFN database */
531 OldIrql
= KeAcquireQueuedSpinLock(LockQueuePfnLock
);
533 /* Allocate a page for hyperspace and create it */
534 PageFrameIndex
= MiRemoveAnyPage(0);
535 TempPde
.u
.Hard
.PageFrameNumber
= PageFrameIndex
;
536 TempPde
.u
.Hard
.Global
= FALSE
; // Hyperspace is local!
537 MI_WRITE_VALID_PTE(StartPde
, TempPde
);
542 /* Release the lock */
543 KeReleaseQueuedSpinLock(LockQueuePfnLock
, OldIrql
);
546 // Zero out the page table now
548 PointerPte
= MiAddressToPte(HYPER_SPACE
);
549 RtlZeroMemory(PointerPte
, PAGE_SIZE
);
552 // Setup the mapping PTEs
554 MmFirstReservedMappingPte
= MiAddressToPte(MI_MAPPING_RANGE_START
);
555 MmLastReservedMappingPte
= MiAddressToPte(MI_MAPPING_RANGE_END
);
556 MmFirstReservedMappingPte
->u
.Hard
.PageFrameNumber
= MI_HYPERSPACE_PTES
;
559 // Reserve system PTEs for zeroing PTEs and clear them
561 MiFirstReservedZeroingPte
= MiReserveSystemPtes(MI_ZERO_PTES
,
563 RtlZeroMemory(MiFirstReservedZeroingPte
, MI_ZERO_PTES
* sizeof(MMPTE
));
566 // Set the counter to maximum to boot with
568 MiFirstReservedZeroingPte
->u
.Hard
.PageFrameNumber
= MI_ZERO_PTES
- 1;
570 return STATUS_SUCCESS
;