Re: [PATCH] MdeModulePkg CapsulePei: Sort and merge memory resource entries

["Yao, Jiewen" <jiewen.yao@intel.com>]

Reviewed-by: Jiewen.yao@intel.com

> -----Original Message-----
> From: Zeng, Star
> Sent: Monday, December 4, 2017 6:01 PM
> To: edk2-devel@lists.01.org
> Cc: Zeng, Star <star.zeng@intel.com>; Yao, Jiewen <jiewen.yao@intel.com>;
> Chiu, Chasel <chasel.chiu@intel.com>; Chiang, Dakota
> <dakota.chiang@intel.com>
> Subject: [PATCH] MdeModulePkg CapsulePei: Sort and merge memory resource
> entries
> 
> Sort and merge memory resource entries to handle the case that
> the memory resource HOBs are reported differently between
> BOOT_ON_FLASH_UPDATE boot mode and normal boot mode, and the
> capsule buffer from UpdateCapsule at normal boot sits across
> two memory resource descriptors at BOOT_ON_FLASH_UPDATE boot mode.
> 
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Chasel Chiu <chasel.chiu@intel.com>
> Cc: Dakota Chiang <dakota.chiang@intel.com>
> Tested-by: Dakota Chiang <dakota.chiang@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Star Zeng <star.zeng@intel.com>
> ---
>  MdeModulePkg/Universal/CapsulePei/UefiCapsule.c | 90
> +++++++++++++++++++++++++
>  1 file changed, 90 insertions(+)
> 
> diff --git a/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
> b/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
> index cca455ec396c..043365f7f770 100644
> --- a/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
> +++ b/MdeModulePkg/Universal/CapsulePei/UefiCapsule.c
> @@ -625,6 +625,82 @@ GetPhysicalAddressBits (
>  #endif
> 
>  /**
> +  Sort memory resource entries based upon PhysicalStart, from low to high.
> +
> +  @param[in, out] MemoryResource    A pointer to the memory resource
> entry buffer.
> +
> +**/
> +VOID
> +SortMemoryResourceDescriptor (
> +  IN OUT MEMORY_RESOURCE_DESCRIPTOR *MemoryResource
> +  )
> +{
> +  MEMORY_RESOURCE_DESCRIPTOR        *MemoryResourceEntry;
> +  MEMORY_RESOURCE_DESCRIPTOR        *NextMemoryResourceEntry;
> +  MEMORY_RESOURCE_DESCRIPTOR        TempMemoryResource;
> +
> +  MemoryResourceEntry = MemoryResource;
> +  NextMemoryResourceEntry = MemoryResource + 1;
> +  while (MemoryResourceEntry->ResourceLength != 0) {
> +    while (NextMemoryResourceEntry->ResourceLength != 0) {
> +      if (MemoryResourceEntry->PhysicalStart >
> NextMemoryResourceEntry->PhysicalStart) {
> +        CopyMem (&TempMemoryResource, MemoryResourceEntry, sizeof
> (MEMORY_RESOURCE_DESCRIPTOR));
> +        CopyMem (MemoryResourceEntry, NextMemoryResourceEntry,
> sizeof (MEMORY_RESOURCE_DESCRIPTOR));
> +        CopyMem (NextMemoryResourceEntry, &TempMemoryResource,
> sizeof (MEMORY_RESOURCE_DESCRIPTOR));
> +      }
> +
> +      NextMemoryResourceEntry = NextMemoryResourceEntry + 1;
> +    }
> +
> +    MemoryResourceEntry     = MemoryResourceEntry + 1;
> +    NextMemoryResourceEntry = MemoryResourceEntry + 1;
> +  }
> +}
> +
> +/**
> +  Merge continous memory resource entries.
> +
> +  @param[in, out] MemoryResource    A pointer to the memory resource
> entry buffer.
> +
> +**/
> +VOID
> +MergeMemoryResourceDescriptor (
> +  IN OUT MEMORY_RESOURCE_DESCRIPTOR *MemoryResource
> +  )
> +{
> +  MEMORY_RESOURCE_DESCRIPTOR        *MemoryResourceEntry;
> +  MEMORY_RESOURCE_DESCRIPTOR        *NewMemoryResourceEntry;
> +  MEMORY_RESOURCE_DESCRIPTOR        *NextMemoryResourceEntry;
> +  MEMORY_RESOURCE_DESCRIPTOR        *MemoryResourceEnd;
> +
> +  MemoryResourceEntry = MemoryResource;
> +  NewMemoryResourceEntry = MemoryResource;
> +  while (MemoryResourceEntry->ResourceLength != 0) {
> +    CopyMem (NewMemoryResourceEntry, MemoryResourceEntry, sizeof
> (MEMORY_RESOURCE_DESCRIPTOR));
> +    NextMemoryResourceEntry = MemoryResourceEntry + 1;
> +
> +    while ((NextMemoryResourceEntry->ResourceLength != 0) &&
> +           (NextMemoryResourceEntry->PhysicalStart ==
> (MemoryResourceEntry->PhysicalStart +
> MemoryResourceEntry->ResourceLength))) {
> +      MemoryResourceEntry->ResourceLength +=
> NextMemoryResourceEntry->ResourceLength;
> +      if (NewMemoryResourceEntry != MemoryResourceEntry) {
> +        NewMemoryResourceEntry->ResourceLength +=
> NextMemoryResourceEntry->ResourceLength;
> +      }
> +
> +      NextMemoryResourceEntry = NextMemoryResourceEntry + 1;
> +    }
> +
> +    MemoryResourceEntry = NextMemoryResourceEntry;
> +    NewMemoryResourceEntry = NewMemoryResourceEntry + 1;
> +  }
> +
> +  //
> +  // Set NULL terminate memory resource descriptor after merging.
> +  //
> +  MemoryResourceEnd = NewMemoryResourceEntry;
> +  ZeroMem (MemoryResourceEnd, sizeof
> (MEMORY_RESOURCE_DESCRIPTOR));
> +}
> +
> +/**
>    Build memory resource descriptor from resource descriptor in HOB list.
> 
>    @return Pointer to the buffer of memory resource descriptor.
> @@ -704,6 +780,20 @@ BuildMemoryResourceDescriptor (
>      Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR,
> Hob.Raw);
>    }
> 
> +  SortMemoryResourceDescriptor (MemoryResource);
> +  MergeMemoryResourceDescriptor (MemoryResource);
> +
> +  DEBUG ((DEBUG_INFO, "Dump MemoryResource[] after sorted and
> merged\n"));
> +  for (Index = 0; MemoryResource[Index].ResourceLength != 0; Index++) {
> +    DEBUG ((
> +      DEBUG_INFO,
> +      "  MemoryResource[0x%x] - Start(0x%0lx) Length(0x%0lx)\n",
> +      Index,
> +      MemoryResource[Index].PhysicalStart,
> +      MemoryResource[Index].ResourceLength
> +      ));
> +  }
> +
>    return MemoryResource;
>  }
> 
> --
> 2.7.0.windows.1