731c67e1d7
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the DynamicTablesPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/** @file
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AML Resource Data.
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Copyright (c) 2019 - 2020, Arm Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Glossary:
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- Rd or RD - Resource Data
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- Rds or RDS - Resource Data Small
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- Rdl or RDL - Resource Data Large
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**/
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#include <ResourceData/AmlResourceData.h>
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/** Check whether the resource data has the input descriptor Id.
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The small/large bit is included in the descriptor Id,
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but the size bits are not included for small resource data elements.
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@param [in] Header Pointer to the first byte of a resource data
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element.
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@param [in] DescriptorId The descriptor to check against.
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@retval TRUE The resource data has the descriptor Id.
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@retval FALSE Otherwise.
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**/
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BOOLEAN
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EFIAPI
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AmlRdCompareDescId (
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IN CONST AML_RD_HEADER *Header,
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IN AML_RD_HEADER DescriptorId
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)
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{
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if (Header == NULL) {
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ASSERT (0);
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return FALSE;
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}
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if (AML_RD_IS_LARGE (Header)) {
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return ((*Header ^ DescriptorId) == 0);
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} else {
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return (((*Header & AML_RD_SMALL_ID_MASK) ^ DescriptorId) == 0);
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}
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}
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/** Get the descriptor Id of the resource data.
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The small/large bit is included in the descriptor Id,
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but the size bits are not included for small resource data elements.
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@param [in] Header Pointer to the first byte of a resource data.
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@return A descriptor Id.
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**/
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AML_RD_HEADER
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EFIAPI
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AmlRdGetDescId (
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IN CONST AML_RD_HEADER *Header
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)
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{
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if (Header == NULL) {
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ASSERT (0);
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return FALSE;
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}
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if (AML_RD_IS_LARGE (Header)) {
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return *Header;
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}
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// Header is a small resource data element.
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return *Header & AML_RD_SMALL_ID_MASK;
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}
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/** Get the size of a resource data element.
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If the resource data element is of the large type, the Header
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is expected to be at least 3 bytes long.
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@param [in] Header Pointer to the first byte of a resource data.
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@return The size of the resource data element.
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**/
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UINT32
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EFIAPI
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AmlRdGetSize (
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IN CONST AML_RD_HEADER *Header
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)
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{
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if (Header == NULL) {
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ASSERT (0);
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return FALSE;
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}
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if (AML_RD_IS_LARGE (Header)) {
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return ((ACPI_LARGE_RESOURCE_HEADER *)Header)->Length +
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sizeof (ACPI_LARGE_RESOURCE_HEADER);
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}
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// Header is a small resource data element.
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return ((ACPI_SMALL_RESOURCE_HEADER *)Header)->Bits.Length +
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sizeof (ACPI_SMALL_RESOURCE_HEADER);
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}
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/** Set the Checksum of an EndTag resource data.
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ACPI 6.4, s6.4.2.9 "End Tag":
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"This checksum is generated such that adding it to the sum of all the data
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bytes will produce a zero sum."
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"If the checksum field is zero, the resource data is treated as if the
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checksum operation succeeded. Configuration proceeds normally."
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@param [in] Header Pointer to the first byte of a resource data.
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@param [in] CheckSum Checksum value to set.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_INVALID_PARAMETER Invalid parameter.
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**/
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EFI_STATUS
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EFIAPI
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AmlRdSetEndTagChecksum (
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IN CONST AML_RD_HEADER *Header,
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IN UINT8 CheckSum
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)
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{
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if ((Header == NULL) ||
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!AmlRdCompareDescId (
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Header,
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AML_RD_BUILD_SMALL_DESC_ID (ACPI_SMALL_END_TAG_DESCRIPTOR_NAME)
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))
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{
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ASSERT (0);
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return EFI_INVALID_PARAMETER;
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}
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((EFI_ACPI_END_TAG_DESCRIPTOR *)Header)->Checksum = CheckSum;
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return EFI_SUCCESS;
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}
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