01/01: [NTOSKRNL] Define the Mm global variables related to Cc on Mm init. This means that MmSystemCacheStart, MmSystemCacheEnd, MmSizeOfSystemCacheInPages have now a valid value. System cache is not used atm the moment though. MmMapViewInSystemCache() is to be implemented, and Cc is to be made aware of this.

[Pierre Schweitzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=d56a24908908b57485209…

commit d56a24908908b574852091af0b8bd9dca7bc1165
Author:     Pierre Schweitzer <pierre(a)reactos.org>
AuthorDate: Tue Feb 6 13:38:55 2018 +0100
Commit:     Pierre Schweitzer <pierre(a)reactos.org>
CommitDate: Tue Feb 6 13:41:23 2018 +0100

    [NTOSKRNL] Define the Mm global variables related to Cc on Mm init.
    This means that MmSystemCacheStart, MmSystemCacheEnd, MmSizeOfSystemCacheInPages
    have now a valid value.
    System cache is not used atm the moment though. MmMapViewInSystemCache() is to
    be implemented, and Cc is to be made aware of this.
    
    CORE-14259
---
 ntoskrnl/include/internal/i386/mm.h |  1 +
 ntoskrnl/mm/ARM3/mminit.c           | 11 ++++++++++-
 ntoskrnl/mm/mminit.c                |  3 +++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/ntoskrnl/include/internal/i386/mm.h b/ntoskrnl/include/internal/i386/mm.h
index 7d5c5ed667..a77b92b9e3 100644
--- a/ntoskrnl/include/internal/i386/mm.h
+++ b/ntoskrnl/include/internal/i386/mm.h
@@ -20,6 +20,7 @@
 #define HYPER_SPACE_END                                0xC0BFFFFF
 #endif
 #define MI_SYSTEM_CACHE_WS_START                (PVOID)0xC0C00000
+#define MI_SYSTEM_CACHE_START                   (PVOID)0xC1000000
 #define MI_PAGED_POOL_START                     (PVOID)0xE1000000
 #define MI_NONPAGED_POOL_END                    (PVOID)0xFFBE0000
 #define MI_DEBUG_MAPPING                        (PVOID)0xFFBFF000
diff --git a/ntoskrnl/mm/ARM3/mminit.c b/ntoskrnl/mm/ARM3/mminit.c
index 76d4a4bee8..eb625fcecb 100644
--- a/ntoskrnl/mm/ARM3/mminit.c
+++ b/ntoskrnl/mm/ARM3/mminit.c
@@ -240,8 +240,9 @@ PMMPTE MiHighestUserPxe;
 #endif
 
 /* These variables define the system cache address space */
-PVOID MmSystemCacheStart;
+PVOID MmSystemCacheStart = MI_SYSTEM_CACHE_START;
 PVOID MmSystemCacheEnd;
+ULONG MmSizeOfSystemCacheInPages;
 MMSUPPORT MmSystemCacheWs;
 
 //
@@ -2494,6 +2495,14 @@ MmArmInitSystem(IN ULONG Phase,
             return FALSE;
         }
 
+        /* Define limits for system cache */
+#ifdef _M_AMD64
+        MmSizeOfSystemCacheInPages = (MI_SYSTEM_CACHE_END - MI_SYSTEM_CACHE_START) /
PAGE_SIZE;
+#else
+        MmSizeOfSystemCacheInPages = ((ULONG_PTR)MI_PAGED_POOL_START -
(ULONG_PTR)MI_SYSTEM_CACHE_START) / PAGE_SIZE;
+#endif
+        MmSystemCacheEnd = (PVOID)((ULONG_PTR)MmSystemCacheStart +
(MmSizeOfSystemCacheInPages * PAGE_SIZE) - 1);
+
         /* Initialize the system cache */
         //MiInitializeSystemCache(MmSystemCacheWsMinimum, MmAvailablePages);
 
diff --git a/ntoskrnl/mm/mminit.c b/ntoskrnl/mm/mminit.c
index 7f756cb778..e0166ee8fb 100644
--- a/ntoskrnl/mm/mminit.c
+++ b/ntoskrnl/mm/mminit.c
@@ -154,6 +154,9 @@ MiDbgDumpAddressSpace(VOID)
     DPRINT1("          0x%p - 0x%p\t%s\n",
             HYPER_SPACE, HYPER_SPACE_END,
             "Hyperspace");
+    DPRINT1("          0x%p - 0x%p\t%s\n",
+            MmSystemCacheStart, MmSystemCacheEnd,
+            "System Cache");
     DPRINT1("          0x%p - 0x%p\t%s\n",
             MmPagedPoolStart,
             (ULONG_PTR)MmPagedPoolStart + MmSizeOfPagedPoolInBytes,