/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ /****************************************************************************** * * Name: acbuffer.h - Support for buffers returned by ACPI predefined names * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #ifndef __ACBUFFER_H__ #define __ACBUFFER_H__ /* * Contains buffer structures for these predefined names: * _FDE, _GRT, _GTM, _PLD, _SRT */ /* * Note: C bitfields are not used for this reason: * * "Bitfields are great and easy to read, but unfortunately the C language * does not specify the layout of bitfields in memory, which means they are * essentially useless for dealing with packed data in on-disk formats or * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me, * this decision was a design error in C. Ritchie could have picked an order * and stuck with it." Norman Ramsey. * See http://stackoverflow.com/a/1053662/41661 */ /* _FDE return value */ struct acpi_fde_info { … }; /* * _GRT return value * _SRT input value */ struct acpi_grt_info { … }; /* _GTM return value */ struct acpi_gtm_info { … }; /* * Formatted _PLD return value. The minimum size is a package containing * one buffer. * Revision 1: Buffer is 16 bytes (128 bits) * Revision 2: Buffer is 20 bytes (160 bits) * * Note: This structure is returned from the acpi_decode_pld_buffer * interface. */ struct acpi_pld_info { … }; /* * Macros to: * 1) Convert a _PLD buffer to internal struct acpi_pld_info format - ACPI_PLD_GET* * (Used by acpi_decode_pld_buffer) * 2) Construct a _PLD buffer - ACPI_PLD_SET* * (Intended for BIOS use only) */ #define ACPI_PLD_REV1_BUFFER_SIZE … #define ACPI_PLD_REV2_BUFFER_SIZE … #define ACPI_PLD_BUFFER_SIZE … /* First 32-bit dword, bits 0:32 */ #define ACPI_PLD_GET_REVISION(dword) … #define ACPI_PLD_SET_REVISION(dword,value) … #define ACPI_PLD_GET_IGNORE_COLOR(dword) … #define ACPI_PLD_SET_IGNORE_COLOR(dword,value) … #define ACPI_PLD_GET_RED(dword) … #define ACPI_PLD_SET_RED(dword,value) … #define ACPI_PLD_GET_GREEN(dword) … #define ACPI_PLD_SET_GREEN(dword,value) … #define ACPI_PLD_GET_BLUE(dword) … #define ACPI_PLD_SET_BLUE(dword,value) … /* Second 32-bit dword, bits 33:63 */ #define ACPI_PLD_GET_WIDTH(dword) … #define ACPI_PLD_SET_WIDTH(dword,value) … #define ACPI_PLD_GET_HEIGHT(dword) … #define ACPI_PLD_SET_HEIGHT(dword,value) … /* Third 32-bit dword, bits 64:95 */ #define ACPI_PLD_GET_USER_VISIBLE(dword) … #define ACPI_PLD_SET_USER_VISIBLE(dword,value) … #define ACPI_PLD_GET_DOCK(dword) … #define ACPI_PLD_SET_DOCK(dword,value) … #define ACPI_PLD_GET_LID(dword) … #define ACPI_PLD_SET_LID(dword,value) … #define ACPI_PLD_GET_PANEL(dword) … #define ACPI_PLD_SET_PANEL(dword,value) … #define ACPI_PLD_GET_VERTICAL(dword) … #define ACPI_PLD_SET_VERTICAL(dword,value) … #define ACPI_PLD_GET_HORIZONTAL(dword) … #define ACPI_PLD_SET_HORIZONTAL(dword,value) … #define ACPI_PLD_GET_SHAPE(dword) … #define ACPI_PLD_SET_SHAPE(dword,value) … #define ACPI_PLD_GET_ORIENTATION(dword) … #define ACPI_PLD_SET_ORIENTATION(dword,value) … #define ACPI_PLD_GET_TOKEN(dword) … #define ACPI_PLD_SET_TOKEN(dword,value) … #define ACPI_PLD_GET_POSITION(dword) … #define ACPI_PLD_SET_POSITION(dword,value) … #define ACPI_PLD_GET_BAY(dword) … #define ACPI_PLD_SET_BAY(dword,value) … /* Fourth 32-bit dword, bits 96:127 */ #define ACPI_PLD_GET_EJECTABLE(dword) … #define ACPI_PLD_SET_EJECTABLE(dword,value) … #define ACPI_PLD_GET_OSPM_EJECT(dword) … #define ACPI_PLD_SET_OSPM_EJECT(dword,value) … #define ACPI_PLD_GET_CABINET(dword) … #define ACPI_PLD_SET_CABINET(dword,value) … #define ACPI_PLD_GET_CARD_CAGE(dword) … #define ACPI_PLD_SET_CARD_CAGE(dword,value) … #define ACPI_PLD_GET_REFERENCE(dword) … #define ACPI_PLD_SET_REFERENCE(dword,value) … #define ACPI_PLD_GET_ROTATION(dword) … #define ACPI_PLD_SET_ROTATION(dword,value) … #define ACPI_PLD_GET_ORDER(dword) … #define ACPI_PLD_SET_ORDER(dword,value) … /* Fifth 32-bit dword, bits 128:159 (Revision 2 of _PLD only) */ #define ACPI_PLD_GET_VERT_OFFSET(dword) … #define ACPI_PLD_SET_VERT_OFFSET(dword,value) … #define ACPI_PLD_GET_HORIZ_OFFSET(dword) … #define ACPI_PLD_SET_HORIZ_OFFSET(dword,value) … /* Panel position defined in _PLD section of ACPI Specification 6.3 */ #define ACPI_PLD_PANEL_TOP … #define ACPI_PLD_PANEL_BOTTOM … #define ACPI_PLD_PANEL_LEFT … #define ACPI_PLD_PANEL_RIGHT … #define ACPI_PLD_PANEL_FRONT … #define ACPI_PLD_PANEL_BACK … #define ACPI_PLD_PANEL_UNKNOWN … #endif /* ACBUFFER_H */
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