This patch added support to report free memory resource lenghth.
It will search for all used memory pages and add them together.
The "virtual" free address will be returned to indicate the
virtual start point of the free memory top. It is virtual since the
memory allocation can be fragmented. This is just an indicator to
calculate the actual used memory size:
UsedMemSize = EndAddr - FreeAddr
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
This patch added DMA memory type into memory allocation pool for payloads.
This DMA memory buffer with PcdDmaBufferSize is located at address
aligned at PcdDmaBufferAlignment after Payload reserved memory. Memory
type EfiRuntimeServicesData is used to indicate DMA memory type.
Stage1B calculates the DMA memory location using fixed PCDs so that
platform can set up DMA protection as early as possible after memory is
ready. In Stage1B or Stage2 platform code should use platform VTd
information to setup PMR to protect all low memory except for the DMA
buffer range. DMA memory will be added into memory pool at the entry
point of the payload. Before transfering to OS, the DMA memory protection
can be disabled, and the DMA memory pool can be reclaimed for OS usage.
Currently only boot media device will utilize the DMA buffer range for
block access operations. So it should only be required by payloads. GFX,
when enabled, will also use DMA. It will be targeted to the system stolen
memory which is not protected by PMR.
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
Current SBL AddMemoryResourceRange() API interface is not scalable.
If more memory type needs to be added, the interface does not allow
to do that. This patch changed the interface to use array and entry
count as parameter so that more ranges can be passed in using the
standard interfaces.
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
This will fully support PatchCheck.py.
- Remove all trailing whitespace
- Convert LF to CRLF by default
- Update EFI_D_* to DEBUG_*
- Re-enable CRLF check in PatchCheck.py
Signed-off-by: Aiden Park <aiden.park@intel.com>
There are cases where temporary memory is required in stages. Since
MemoryAllocationLib instance for stages has no de-allocation function,
it needs special handling. This patch added temporary memory management
into standard MemoryAllocatoinLib interface.
Signed-off-by: Maurice Ma <maurice.ma@intel.com>
