diff options
| -rw-r--r-- | MdeModulePkg/Core/Pei/Memory/MemoryServices.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c index 10f21d5..1213702 100644 --- a/MdeModulePkg/Core/Pei/Memory/MemoryServices.c +++ b/MdeModulePkg/Core/Pei/Memory/MemoryServices.c @@ -178,16 +178,20 @@ PeiAllocatePages ( // Check to see if on 4k boundary, If not aligned, make the allocation aligned.
//
*(FreeMemoryTop) -= *(FreeMemoryTop) & 0xFFF;
-
+
//
- // Verify that there is sufficient memory to satisfy the allocation
+ // Verify that there is sufficient memory to satisfy the allocation.
+ // For page allocation, the overhead sizeof (EFI_HOB_MEMORY_ALLOCATION) needs to be considered.
//
- RemainingPages = (UINTN)(*FreeMemoryTop - *FreeMemoryBottom) >> EFI_PAGE_SHIFT;
+ if ((UINTN) (*FreeMemoryTop - *FreeMemoryBottom) < (UINTN) ALIGN_VALUE (sizeof (EFI_HOB_MEMORY_ALLOCATION), 8)) {
+ DEBUG ((EFI_D_ERROR, "AllocatePages failed: No space to build memory allocation hob.\n"));
+ return EFI_OUT_OF_RESOURCES;
+ }
+ RemainingPages = (UINTN)(*FreeMemoryTop - *FreeMemoryBottom - ALIGN_VALUE (sizeof (EFI_HOB_MEMORY_ALLOCATION), 8)) >> EFI_PAGE_SHIFT;
//
- // For page allocation, the overhead sizeof (EFI_HOB_MEMORY_ALLOCATION) needs one extra page.
- // So the number of remaining pages needs to be greater than that of the request pages.
+ // The number of remaining pages needs to be greater than or equal to that of the request pages.
//
- if (RemainingPages <= Pages) {
+ if (RemainingPages < Pages) {
DEBUG ((EFI_D_ERROR, "AllocatePages failed: No 0x%lx Pages is available.\n", (UINT64) Pages));
DEBUG ((EFI_D_ERROR, "There is only left 0x%lx pages memory resource to be allocated.\n", (UINT64) RemainingPages));
return EFI_OUT_OF_RESOURCES;
|