01/01: [NTOSKRNL] Round memory size up, "debug log" part

[Serge Gautherie]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=9ff9bd81c4259db3e02799...

commit 9ff9bd81c4259db3e027999dd5c05341ffaa9b4e
Author:     Serge Gautherie [e-mail]
AuthorDate: Sat Feb 3 00:19:18 2018 +0100
Commit:     Mark Jansen [e-mail]
CommitDate: Tue Aug 7 20:36:04 2018 +0200

[NTOSKRNL] Round memory size up, "debug log" part

Assumed to better match actual physical RAM size.

CORE-12321
---
 ntoskrnl/ex/init.c     | 5 +++--
 ntoskrnl/kd/kdio.c     | 9 ++++++---
 ntoskrnl/kd64/kdinit.c | 3 ++-
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/ntoskrnl/ex/init.c b/ntoskrnl/ex/init.c
index 826cc3b356..1e9a9c07f8 100644
--- a/ntoskrnl/ex/init.c
+++ b/ntoskrnl/ex/init.c
@@ -1580,8 +1580,9 @@ Phase1InitializationDiscard(IN PVOID Context)
                                WINDOWS_NT_INFO_STRING,
                                &MsgEntry);

-    /* Get total RAM size */
-    Size = MmNumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+    /* Get total RAM size, in MiB */
+    /* Round size up. Assumed to better match actual physical RAM size */
+    Size = ALIGN_UP_BY(MmNumberOfPhysicalPages * PAGE_SIZE, 1024 * 1024) / (1024 * 1024);

/* Create the string */
     StringBuffer = InitBuffer->VersionBuffer;
diff --git a/ntoskrnl/kd/kdio.c b/ntoskrnl/kd/kdio.c
index 53c99c43d4..38a1d3fc9a 100644
--- a/ntoskrnl/kd/kdio.c
+++ b/ntoskrnl/kd/kdio.c
@@ -93,7 +93,8 @@ KdpGetMemorySizeInMBs(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
         }
     }

-    return NumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+    /* Round size up. Assumed to better match actual physical RAM size */
+    return ALIGN_UP_BY(NumberOfPhysicalPages * PAGE_SIZE, 1024 * 1024) / (1024 * 1024);
 }

/* See also: kd64\kdinit.c */
@@ -255,7 +256,8 @@ KdpInitDebugLog(PKD_DISPATCH_TABLE DispatchTable,
         KeInitializeSpinLock(&KdpDebugLogSpinLock);

/* Display separator + ReactOS version at start of the debug log */
-        MemSizeMBs = MmNumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+        /* Round size up. Assumed to better match actual physical RAM size */
+        MemSizeMBs = ALIGN_UP_BY(MmNumberOfPhysicalPages * PAGE_SIZE, 1024 * 1024) / (1024 * 1024);
         KdpPrintBanner(MemSizeMBs);
     }
     else if (BootPhase == 2)
@@ -554,7 +556,8 @@ KdpScreenInit(PKD_DISPATCH_TABLE DispatchTable,
         KeInitializeSpinLock(&KdpDmesgLogSpinLock);

/* Display separator + ReactOS version at start of the debug log */
-        MemSizeMBs = MmNumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+        /* Round size up. Assumed to better match actual physical RAM size */
+        MemSizeMBs = ALIGN_UP_BY(MmNumberOfPhysicalPages * PAGE_SIZE, 1024 * 1024) / (1024 * 1024);
         KdpPrintBanner(MemSizeMBs);
     }
     else if (BootPhase == 2)
diff --git a/ntoskrnl/kd64/kdinit.c b/ntoskrnl/kd64/kdinit.c
index 64a7c7b519..b6a8beb9ce 100644
--- a/ntoskrnl/kd64/kdinit.c
+++ b/ntoskrnl/kd64/kdinit.c
@@ -62,7 +62,8 @@ KdpGetMemorySizeInMBs(IN PLOADER_PARAMETER_BLOCK LoaderBlock)
         }
     }

-    return NumberOfPhysicalPages * PAGE_SIZE / 1024 / 1024;
+    /* Round size up. Assumed to better match actual physical RAM size */
+    return ALIGN_UP_BY(NumberOfPhysicalPages * PAGE_SIZE, 1024 * 1024) / (1024 * 1024);
 }

/* See also: kd\kdio.c */