mirror of https://github.com/acidanthera/audk.git
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/** @file
|
|
AML Resource Data.
|
|
|
|
Copyright (c) 2019 - 2020, Arm Limited. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
@par Glossary:
|
|
- Rd or RD - Resource Data
|
|
- Rds or RDS - Resource Data Small
|
|
- Rdl or RDL - Resource Data Large
|
|
**/
|
|
|
|
#include <ResourceData/AmlResourceData.h>
|
|
|
|
/** Check whether the resource data has the input descriptor Id.
|
|
|
|
The small/large bit is included in the descriptor Id,
|
|
but the size bits are not included for small resource data elements.
|
|
|
|
@param [in] Header Pointer to the first byte of a resource data
|
|
element.
|
|
@param [in] DescriptorId The descriptor to check against.
|
|
|
|
@retval TRUE The resource data has the descriptor Id.
|
|
@retval FALSE Otherwise.
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
AmlRdCompareDescId (
|
|
IN CONST AML_RD_HEADER * Header,
|
|
IN AML_RD_HEADER DescriptorId
|
|
)
|
|
{
|
|
if (Header == NULL) {
|
|
ASSERT (0);
|
|
return FALSE;
|
|
}
|
|
|
|
if (AML_RD_IS_LARGE (Header)) {
|
|
return ((*Header ^ DescriptorId) == 0);
|
|
} else {
|
|
return (((*Header & AML_RD_SMALL_ID_MASK) ^ DescriptorId) == 0);
|
|
}
|
|
}
|
|
|
|
/** Get the descriptor Id of the resource data.
|
|
|
|
The small/large bit is included in the descriptor Id,
|
|
but the size bits are not included for small resource data elements.
|
|
|
|
@param [in] Header Pointer to the first byte of a resource data.
|
|
|
|
@return A descriptor Id.
|
|
**/
|
|
AML_RD_HEADER
|
|
EFIAPI
|
|
AmlRdGetDescId (
|
|
IN CONST AML_RD_HEADER * Header
|
|
)
|
|
{
|
|
if (Header == NULL) {
|
|
ASSERT (0);
|
|
return FALSE;
|
|
}
|
|
|
|
if (AML_RD_IS_LARGE (Header)) {
|
|
return *Header;
|
|
}
|
|
|
|
// Header is a small resource data element.
|
|
return *Header & AML_RD_SMALL_ID_MASK;
|
|
}
|
|
|
|
/** Get the size of a resource data element.
|
|
|
|
If the resource data element is of the large type, the Header
|
|
is expected to be at least 3 bytes long.
|
|
|
|
@param [in] Header Pointer to the first byte of a resource data.
|
|
|
|
@return The size of the resource data element.
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
AmlRdGetSize (
|
|
IN CONST AML_RD_HEADER * Header
|
|
)
|
|
{
|
|
if (Header == NULL) {
|
|
ASSERT (0);
|
|
return FALSE;
|
|
}
|
|
|
|
if (AML_RD_IS_LARGE (Header)) {
|
|
return ((ACPI_LARGE_RESOURCE_HEADER*)Header)->Length +
|
|
sizeof (ACPI_LARGE_RESOURCE_HEADER);
|
|
}
|
|
|
|
// Header is a small resource data element.
|
|
return ((ACPI_SMALL_RESOURCE_HEADER*)Header)->Bits.Length +
|
|
sizeof (ACPI_SMALL_RESOURCE_HEADER);
|
|
}
|