#define _1KB (1024)
#define _1MB (1024 * _1KB)
-/* Are mapped by a PDE */
+/* Area mapped by a PDE */
#define PDE_MAPPED_VA (PTE_COUNT * PAGE_SIZE)
/* Size of a PDE directory, and size of a page table */
#define MM_DECOMMIT 0x10
#define MM_NOACCESS (MM_DECOMMIT | MM_NOCACHE)
+//
+// Specific PTE Definitions that map to the Memory Manager's Protection Mask Bits
+// The Memory Manager's definition define the attributes that must be preserved
+// and these PTE definitions describe the attributes in the hardware sense. This
+// helps deal with hardware differences between the actual boolean expression of
+// the argument.
+//
+// For example, in the logical attributes, we want to express read-only as a flag
+// but on x86, it is writability that must be set. On the other hand, on x86, just
+// like in the kernel, it is disabling the caches that requires a special flag,
+// while on certain architectures such as ARM, it is enabling the cache which
+// requires a flag.
+//
+#if defined(_M_IX86) || defined(_M_AMD64)
+//
+// Access Flags
+//
+#define PTE_READONLY 0
+#define PTE_EXECUTE 0 // Not worrying about NX yet
+#define PTE_EXECUTE_READ 0 // Not worrying about NX yet
+#define PTE_READWRITE 0x2
+#define PTE_WRITECOPY 0x200
+#define PTE_EXECUTE_READWRITE 0x0
+#define PTE_EXECUTE_WRITECOPY 0x200
+//
+// Cache flags
+//
+#define PTE_ENABLE_CACHE 0
+#define PTE_DISABLE_CACHE 0x10
+#define PTE_WRITECOMBINED_CACHE 0x10
+#elif defined(_M_ARM)
+#else
+#error Define these please!
+#endif
+static const
+ULONG
+MmProtectToPteMask[32] =
+{
+ //
+ // These are the base MM_ protection flags
+ //
+ 0,
+ PTE_READONLY | PTE_ENABLE_CACHE,
+ PTE_EXECUTE | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_READ | PTE_ENABLE_CACHE,
+ PTE_READWRITE | PTE_ENABLE_CACHE,
+ PTE_WRITECOPY | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_READWRITE | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_WRITECOPY | PTE_ENABLE_CACHE,
+ //
+ // These OR in the MM_NOCACHE flag
+ //
+ 0,
+ PTE_READONLY | PTE_DISABLE_CACHE,
+ PTE_EXECUTE | PTE_DISABLE_CACHE,
+ PTE_EXECUTE_READ | PTE_DISABLE_CACHE,
+ PTE_READWRITE | PTE_DISABLE_CACHE,
+ PTE_WRITECOPY | PTE_DISABLE_CACHE,
+ PTE_EXECUTE_READWRITE | PTE_DISABLE_CACHE,
+ PTE_EXECUTE_WRITECOPY | PTE_DISABLE_CACHE,
+ //
+ // These OR in the MM_DECOMMIT flag, which doesn't seem supported on x86/64/ARM
+ //
+ 0,
+ PTE_READONLY | PTE_ENABLE_CACHE,
+ PTE_EXECUTE | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_READ | PTE_ENABLE_CACHE,
+ PTE_READWRITE | PTE_ENABLE_CACHE,
+ PTE_WRITECOPY | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_READWRITE | PTE_ENABLE_CACHE,
+ PTE_EXECUTE_WRITECOPY | PTE_ENABLE_CACHE,
+ //
+ // These OR in the MM_NOACCESS flag, which seems to enable WriteCombining?
+ //
+ 0,
+ PTE_READONLY | PTE_WRITECOMBINED_CACHE,
+ PTE_EXECUTE | PTE_WRITECOMBINED_CACHE,
+ PTE_EXECUTE_READ | PTE_WRITECOMBINED_CACHE,
+ PTE_READWRITE | PTE_WRITECOMBINED_CACHE,
+ PTE_WRITECOPY | PTE_WRITECOMBINED_CACHE,
+ PTE_EXECUTE_READWRITE | PTE_WRITECOMBINED_CACHE,
+ PTE_EXECUTE_WRITECOPY | PTE_WRITECOMBINED_CACHE,
+};
+
+//
+// Assertions for session images, addresses, and PTEs
+//
+#define MI_IS_SESSION_IMAGE_ADDRESS(Address) \
+ (((Address) >= MiSessionImageStart) && ((Address) < MiSessionImageEnd))
+
+#define MI_IS_SESSION_ADDRESS(Address) \
+ (((Address) >= MmSessionBase) && ((Address) < MiSessionSpaceEnd))
+
+#define MI_IS_SESSION_PTE(Pte) \
+ ((((PMMPTE)Pte) >= MiSessionBasePte) && (((PMMPTE)Pte) < MiSessionLastPte))
+
//
// Corresponds to MMPTE_SOFTWARE.Protection
//
//
// Creates a software PTE with the given protection
//
-#define MI_MAKE_SOFTWARE_PTE(x) ((x) << MM_PTE_SOFTWARE_PROTECTION_BITS)
+#define MI_MAKE_SOFTWARE_PTE(p, x) ((p)->u.Long = (x << MM_PTE_SOFTWARE_PROTECTION_BITS))
+
+//
+// Marks a PTE as deleted
+//
+#define MI_SET_PFN_DELETED(x) ((x)->PteAddress = (PMMPTE)((ULONG_PTR)(x)->PteAddress | 1))
+#define MI_IS_PFN_DELETED(x) ((ULONG_PTR)((x)->PteAddress) & 1)
//
// Special values for LoadedImports
//
#define LIST_HEAD 0xFFFFFFFF
+//
+// Special IRQL value (found in assertions)
+//
+#define MM_NOIRQL (KIRQL)0xFFFFFFFF
+
//
// FIXFIX: These should go in ex.h after the pool merge
//
extern ULONG MmSystemViewSize;
extern PVOID MmSessionBase;
extern PVOID MiSessionSpaceEnd;
+extern PMMPTE MiSessionImagePteStart;
+extern PMMPTE MiSessionImagePteEnd;
+extern PMMPTE MiSessionBasePte;
+extern PMMPTE MiSessionLastPte;
extern ULONG MmSizeOfPagedPoolInBytes;
extern PMMPTE MmSystemPagePtes;
extern PVOID MmSystemCacheStart;
extern PFN_NUMBER MmTotalSystemDriverPages;
extern PVOID MiSessionImageStart;
extern PVOID MiSessionImageEnd;
+extern PMMPTE MiHighestUserPte;
+extern PMMPDE MiHighestUserPde;
+extern PFN_NUMBER MmSystemPageDirectory[PD_COUNT];
#define MI_PFN_TO_PFNENTRY(x) (&MmPfnDatabase[1][x])
#define MI_PFNENTRY_TO_PFN(x) (x - MmPfnDatabase[1])
-#define MI_IS_SESSION_IMAGE_ADDRESS(Address) \
- (((Address) >= MiSessionImageStart) && ((Address) < MiSessionImageEnd))
+//
+// Creates a valid kernel PTE with the given protection
+//
+FORCEINLINE
+VOID
+MI_MAKE_HARDWARE_PTE(IN PMMPTE NewPte,
+ IN PMMPTE MappingPte,
+ IN ULONG ProtectionMask,
+ IN PFN_NUMBER PageFrameNumber)
+{
+ /* Only valid for kernel, non-session PTEs */
+ ASSERT(MappingPte > MiHighestUserPte);
+ ASSERT(!MI_IS_SESSION_PTE(MappingPte));
+ ASSERT((MappingPte < (PMMPTE)PDE_BASE) || (MappingPte > (PMMPTE)PDE_TOP));
+
+ /* Start fresh */
+ *NewPte = ValidKernelPte;
+
+ /* Set the protection and page */
+ NewPte->u.Hard.PageFrameNumber = PageFrameNumber;
+ NewPte->u.Long |= MmProtectToPteMask[ProtectionMask];
+}
-#define MI_IS_SESSION_ADDRESS(Address) \
- (((Address) >= MmSessionBase) && ((Address) < MiSessionSpaceEnd))
-
+//
+// Returns if the page is physically resident (ie: a large page)
+// FIXFIX: CISC/x86 only?
+//
FORCEINLINE
BOOLEAN
MI_IS_PHYSICAL_ADDRESS(IN PVOID Address)
IN ULONG Protection
);
+VOID
+NTAPI
+MiInitializePfn(
+ IN PFN_NUMBER PageFrameIndex,
+ IN PMMPTE PointerPte,
+ IN BOOLEAN Modified
+);
+
+VOID
+NTAPI
+MiInitializePfnForOtherProcess(
+ IN PFN_NUMBER PageFrameIndex,
+ IN PMMPTE PointerPte,
+ IN PFN_NUMBER PteFrame
+);
+
+VOID
+NTAPI
+MiDecrementShareCount(
+ IN PMMPFN Pfn1,
+ IN PFN_NUMBER PageFrameIndex
+);
+
PFN_NUMBER
NTAPI
MiRemoveAnyPage(
VOID
);
+BOOLEAN
+NTAPI
+MiIsPfnInUse(
+ IN PMMPFN Pfn1
+);
+
/* EOF */
projects / reactos.git / blobdiff