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OvmfPkg/PlatformInitLib: Add PlatformGetLowMemoryCB

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Add PlatformGetLowMemoryCB() callback function for use with
PlatformScanE820().  It stores the low memory size in
PlatformInfoHob->LowMemory.  This replaces calls to
PlatformScanOrAdd64BitE820Ram() with non-NULL LowMemory.

Write any actions done (setting LowMemory) to the firmware log
with INFO loglevel.

Also change PlatformGetSystemMemorySizeBelow4gb() to likewise set
PlatformInfoHob->LowMemory instead of returning the value.  Update
all Callers to the new convention.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Gerd Hoffmann
2023-01-17 13:16:26 +01:00
committed by mergify[bot]
parent e037530468
commit 124b765051
6 changed files with 60 additions and 33 deletions
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3
OvmfPkg/Library/PeilessStartupLib/Hob.c
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@@ -42,7 +42,8 @@ ConstructSecHobList (
ZeroMem (&PlatformInfoHob, sizeof (PlatformInfoHob));
PlatformInfoHob.HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
LowMemorySize = PlatformGetSystemMemorySizeBelow4gb (&PlatformInfoHob);
PlatformGetSystemMemorySizeBelow4gb (&PlatformInfoHob);
LowMemorySize = PlatformInfoHob.LowMemory;
ASSERT (LowMemorySize != 0);
LowMemoryStart = FixedPcdGet32 (PcdOvmfDxeMemFvBase) + FixedPcdGet32 (PcdOvmfDxeMemFvSize);
LowMemorySize -= LowMemoryStart;