Re: [PATCH] IntelFrameworkModule/LegacyBios: Use reserved memory for legacy data

["Zeng, Star" <star.zeng@intel.com>]

Please also update the function comment "   Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
   memory."


With that, Reviewed-by: Star Zeng <star.zeng@intel.com>.


Thanks,
Star
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Ruiyu Ni
Sent: Wednesday, April 25, 2018 3:06 PM
To: edk2-devel@lists.01.org
Cc: Zeng, Star <star.zeng@intel.com>
Subject: [edk2] [PATCH] IntelFrameworkModule/LegacyBios: Use reserved memory for legacy data

Certain Legacy USB implementation needs to access legacy data (BDA,
etc.) from SMM environment. While currently it's not allowed to access BS memory from SMM after EndofDxe, change the legacy data to use reserved memory type.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
---
 IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c      | 13 +++++++++++--
 .../Csm/LegacyBiosDxe/LegacyBiosInterface.h                 |  4 +++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
index fca08a8fa2..a96f9b5610 100644
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBios.c
@@ -46,7 +46,8 @@ BOOLEAN               mEndOfDxe                = FALSE;
   Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
   memory.
 
-  @param  AllocateType               Allocated Legacy Memory Type
+  @param  AllocateType               The type of allocation to perform.
+  @param  MemoryType                 The type of memory to allocate.
   @param  StartPageAddress           Start address of range
   @param  Pages                      Number of pages to allocate
   @param  Result                     Result of allocation
@@ -58,6 +59,7 @@ BOOLEAN               mEndOfDxe                = FALSE;
 EFI_STATUS
 AllocateLegacyMemory (
   IN  EFI_ALLOCATE_TYPE         AllocateType,
+  IN  EFI_MEMORY_TYPE           MemoryType,
   IN  EFI_PHYSICAL_ADDRESS      StartPageAddress,
   IN  UINTN                     Pages,
   OUT EFI_PHYSICAL_ADDRESS      *Result
@@ -72,7 +74,7 @@ AllocateLegacyMemory (
   MemPage = (EFI_PHYSICAL_ADDRESS) (UINTN) StartPageAddress;
   Status = gBS->AllocatePages (
                   AllocateType,
-                  EfiBootServicesCode,
+                  MemoryType,
                   Pages,
                   &MemPage
                   );
@@ -974,6 +976,7 @@ LegacyBiosInstall (
   //
   AllocateLegacyMemory (
     AllocateAddress,
+    EfiReservedMemoryType,
     0,
     1,
     &MemoryAddress
@@ -999,6 +1002,7 @@ LegacyBiosInstall (
 
   Status = AllocateLegacyMemory (
              AllocateAddress,
+             EfiReservedMemoryType,
              CONVENTIONAL_MEMORY_TOP - MemorySize,
              EFI_SIZE_TO_PAGES (MemorySize),
              &MemoryAddress
@@ -1027,6 +1031,7 @@ LegacyBiosInstall (
   for (MemStart = MemoryAddress; MemStart < MemoryAddress + MemorySize; MemStart += 0x1000) {
     Status = AllocateLegacyMemory (
                AllocateAddress,
+               EfiBootServicesCode,
                MemStart,
                1,
                &StartAddress
@@ -1046,6 +1051,7 @@ LegacyBiosInstall (
   ASSERT ((MemorySize & 0xFFF) == 0);  
   Status = AllocateLegacyMemory (
              AllocateMaxAddress,
+             EfiBootServicesCode,
              CONVENTIONAL_MEMORY_TOP,
              EFI_SIZE_TO_PAGES (MemorySize),
              &MemoryAddressUnder1MB
@@ -1059,6 +1065,7 @@ LegacyBiosInstall (
   //
   Status = AllocateLegacyMemory (
              AllocateMaxAddress,
+             EfiReservedMemoryType,
              CONVENTIONAL_MEMORY_TOP,
              (sizeof (LOW_MEMORY_THUNK) / EFI_PAGE_SIZE) + 2,
              &MemoryAddress
@@ -1086,6 +1093,7 @@ LegacyBiosInstall (
   //   
   Status = AllocateLegacyMemory (
              AllocateMaxAddress,
+             EfiBootServicesCode,
              0x1000000,
              EFI_SIZE_TO_PAGES (MemorySize),
              &MemoryAddress
@@ -1096,6 +1104,7 @@ LegacyBiosInstall (
     //   
     Status = AllocateLegacyMemory (
                AllocateMaxAddress,
+               EfiBootServicesCode,
                0xFFFFFFFF,
                EFI_SIZE_TO_PAGES (MemorySize),
                &MemoryAddress
diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
index cc2fc9fc13..595fe0eade 100644
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
@@ -1264,7 +1264,8 @@ GenerateSoftInit (
   Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
   memory.
 
-  @param  AllocateType               Allocated Legacy Memory Type
+  @param  AllocateType               The type of allocation to perform.
+  @param  MemoryType                 The type of memory to allocate.
   @param  StartPageAddress           Start address of range
   @param  Pages                      Number of pages to allocate
   @param  Result                     Result of allocation
@@ -1276,6 +1277,7 @@ GenerateSoftInit (  EFI_STATUS  AllocateLegacyMemory (
   IN  EFI_ALLOCATE_TYPE         AllocateType,
+  IN  EFI_MEMORY_TYPE           MemoryType,
   IN  EFI_PHYSICAL_ADDRESS      StartPageAddress,
   IN  UINTN                     Pages,
   OUT EFI_PHYSICAL_ADDRESS      *Result
--
2.16.1.windows.1

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