Small cleanups around PlatformInitPei.

Signed-off-by: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Cc: Theo Jehl <theojehl76@gmail.com>
---
 .../QemuOpenBoardPkg/PlatformInitPei/Cpu.c    |  2 +-
 .../QemuOpenBoardPkg/PlatformInitPei/Memory.c |  9 ++----
 .../PlatformInitPei/PlatformInit.h            | 28 ++++++++++++++-----
 3 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Cpu.c b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Cpu.c
index e203b2654226..2fc62a0a3e77 100644
--- a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Cpu.c
+++ b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Cpu.c
@@ -20,7 +20,7 @@
 /**
   Probe Qemu FW CFG device for current CPU count and report to MpInitLib.

-  @return EFI_SUCCESS      Detection was successful.
+  @retval EFI_SUCCESS      Detection was successful.
   @retval EFI_UNSUPPORTED  QEMU FW CFG device is not present.
  */
 EFI_STATUS
diff --git a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Memory.c b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Memory.c
index 4f312c36016e..223cace0ca98 100644
--- a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Memory.c
+++ b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/Memory.c
@@ -86,8 +86,8 @@ GetTopNonHoleAddr (
 STATIC
 VOID
 ReserveMmioRegion (
-  EFI_PHYSICAL_ADDRESS  Start,
-  UINT64                Length
+  IN EFI_PHYSICAL_ADDRESS  Start,
+  IN UINT64                Length
   )
 {
   EFI_RESOURCE_TYPE            ResourceType;
@@ -121,7 +121,6 @@ InstallMemory (
   )
 {
   EFI_STATUS                   Status;
-  CONST EFI_PEI_SERVICES       **PeiServicesTable;
   EFI_E820_ENTRY64             E820Entry;
   EFI_E820_ENTRY64             LargestE820Entry;
   QEMU_FW_CFG_FILE             FwCfgFile;
@@ -250,9 +249,7 @@ InstallMemory (
     LargestE820Entry.BaseAddr + LargestE820Entry.Length - 1
     ));

-  PeiServicesTable = GetPeiServicesTablePointer ();
-
-  Status = (*PeiServices)->InstallPeiMemory (PeiServicesTable, LargestE820Entry.BaseAddr, LargestE820Entry.Length);
+  Status = (*PeiServices)->InstallPeiMemory (PeiServices, LargestE820Entry.BaseAddr, LargestE820Entry.Length);

   ASSERT_EFI_ERROR (Status);

diff --git a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/PlatformInit.h b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/PlatformInit.h
index f4044df3dbf5..f17df707188a 100644
--- a/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/PlatformInit.h
+++ b/Platform/Qemu/QemuOpenBoardPkg/PlatformInitPei/PlatformInit.h
@@ -20,19 +20,27 @@

 #define PCI_MMIO_TOP_ADDRESS  0xFC000000

-EFI_STATUS
-EFIAPI
-PlatformInit (
-  IN       EFI_PEI_FILE_HANDLE  FileHandle,
-  IN CONST EFI_PEI_SERVICES     **PeiServices
-  );
+/**
+  Return the memory size below 4GB.

+  @return Size of memory below 4GB, in bytes.
+**/
 UINT32
 EFIAPI
 GetMemoryBelow4Gb (
   VOID
   );

+/**
+  Install EFI memory by probing QEMU FW CFG devices for valid E820 entries.
+  It also reserves space for MMIO regions such as VGA, BIOS and APIC.
+
+  @param[in] PeiServices      PEI Services pointer.
+
+  @retval EFI_SUCCESS     Memory initialization succeded.
+  @retval EFI_UNSUPPORTED Installation failed (etc/e820 file was not found).
+  @retval EFI_NOT_FOUND   QEMU FW CFG device is not present.
+**/
 EFI_STATUS
 EFIAPI
 InstallMemory (
@@ -58,6 +66,12 @@ InitializePci (
   QEMU_PLATFORM  Platform
   );

+/**
+  Probe Qemu FW CFG device for current CPU count and report to MpInitLib.
+
+  @retval EFI_SUCCESS      Detection was successful.
+  @retval EFI_UNSUPPORTED  QEMU FW CFG device is not present.
+ */
 EFI_STATUS
 EFIAPI
 MaxCpuInit (
@@ -74,4 +88,4 @@ GetTopNonHoleAddr (
   VOID
   );

-#endif //QEMU_OPEN_BOARD_PKG_PLATFORM_INIT_H_
+#endif // QEMU_OPEN_BOARD_PKG_PLATFORM_INIT_H_
--
2.39.0