/**
Pool allocation service. Before permenent memory is discoveried, the pool will
be allocated the heap in the temporary memory. Genenrally, the size of heap in temporary
memory does not exceed to 64K, so the biggest pool size could be allocated is
64K.
@param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
@param Size Amount of memory required
@param Buffer Address of pointer to the buffer
@retval EFI_SUCCESS The allocation was successful
@retval EFI_OUT_OF_RESOURCES There is not enough heap to satisfy the requirement
to allocate the requested size.
**/
EFI_STATUS
EFIAPI
PeiAllocatePool (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN UINTN Size,
OUT VOID **Buffer
)
{
EFI_STATUS Status;
EFI_HOB_MEMORY_POOL *Hob;
//
// If some "post-memory" PEIM wishes to allocate larger pool,
// it should use AllocatePages service instead.
//
//
// Generally, the size of heap in temporary memory does not exceed to 64K,
// HobLength is multiples of 8 bytes, so the maxmium size of pool is 0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL)
//
if (Size > (0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL))) {
return EFI_OUT_OF_RESOURCES;
}
Status = PeiServicesCreateHob (
EFI_HOB_TYPE_MEMORY_POOL,
(UINT16)(sizeof (EFI_HOB_MEMORY_POOL) + Size),
(VOID **)&Hob
);
ASSERT_EFI_ERROR (Status);
*Buffer = Hob+1;
return Status;
}
EFIAPI
InternalPeiCreateHob (
IN UINT16 Type,
IN UINT16 Length
)
{
EFI_STATUS Status;
VOID *Hob;
Status = PeiServicesCreateHob (Type, Length, &Hob);
//
// Assume the process of HOB building is always successful.
//
ASSERT_EFI_ERROR (Status);
return Hob;
}
VOID
EFIAPI
BuildGlobalVariableHob (
IN EFI_PHYSICAL_ADDRESS GlobalVariableBase,
IN UINT32 GlobalVariableSize
)
{
EFI_STATUS Status;
ARM_HOB_GLOBAL_VARIABLE *Hob;
Status = PeiServicesCreateHob (EFI_HOB_TYPE_GUID_EXTENSION, sizeof (ARM_HOB_GLOBAL_VARIABLE), (VOID**)&Hob);
if (!EFI_ERROR(Status)) {
CopyGuid (&(Hob->Header.Name), &gArmGlobalVariableGuid);
Hob->GlobalVariableBase = GlobalVariableBase;
Hob->GlobalVariableSize = GlobalVariableSize;
}
}
/**
Adds a new HOB to the HOB List.
This internal function enables PEIMs to create various types of HOBs.
@param Type Type of the new HOB.
@param Length Length of the new HOB to allocate.
@retval NULL The HOB could not be allocated.
@retval others The address of new HOB.
**/
STATIC
VOID *
InternalPeiCreateHob (
IN UINT16 Type,
IN UINT16 Length
)
{
EFI_STATUS Status;
VOID *Hob;
Status = PeiServicesCreateHob (Type, Length, &Hob);
if (EFI_ERROR (Status)) {
Hob = NULL;
}
//
// Assume the process of HOB building is always successful.
//
ASSERT (Hob != NULL);
return Hob;
}