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Michael Kubackiandmergify[bot]
7a934d0bef
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.
`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.
Compared to macro-based include guards, `#pragma once`:
- Eliminates the risk of macro name collisions or copy/paste errors
where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
(e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
file entirely, rather than re-reading it to find the matching
`#endif` ("multiple-include optimization").
- Note that some compilers may already optimize traditional include
guards, by recognzining the idiomatic pattern.
This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.
However, this is considered acceptable given:
1. edk2 already defines a subset of supported compilers in
BaseTools/Conf/tools_def.template, all of which have supported
`#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
include guard naming and potential macro collisions.
Approximate compiler support dates:
- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
(http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/** @file
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Define the PPI to abstract the functions that enable IDE and SATA channels, and to retrieve
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the base I/O port address for each of the enabled IDE and SATA channels.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#pragma once
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///
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/// Global ID for the PEI_ATA_CONTROLLER_PPI.
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///
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#define PEI_ATA_CONTROLLER_PPI_GUID \
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{ \
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0xa45e60d1, 0xc719, 0x44aa, {0xb0, 0x7a, 0xaa, 0x77, 0x7f, 0x85, 0x90, 0x6d } \
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}
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///
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/// Forward declaration for the PEI_ATA_CONTROLLER_PPI.
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///
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typedef struct _PEI_ATA_CONTROLLER_PPI PEI_ATA_CONTROLLER_PPI;
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// disable the IDE channels.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_IDE_NONE 0x00
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// enable the Primary IDE channel.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_IDE_PRIMARY 0x01
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// enable the Secondary IDE channel.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_IDE_SECONDARY 0x02
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// disable the SATA channel.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_SATA_NONE 0x04
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// enable the Primary SATA channel.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_SATA_PRIMARY 0x08
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///
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/// This bit is used in the ChannelMask parameter of EnableAtaChannel() to
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/// enable the Secondary SATA channel.
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/// This is designed for old generation chipset with PATA/SATA controllers.
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/// It may be ignored in PPI implementation for new generation chipset without PATA controller.
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///
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#define PEI_ICH_SATA_SECONDARY 0x010
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///
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/// Structure that contains the base addresses for the IDE registers
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///
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typedef struct {
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///
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/// Base I/O port address of the IDE controller's command block
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///
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UINT16 CommandBlockBaseAddr;
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///
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/// Base I/O port address of the IDE controller's control block
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///
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UINT16 ControlBlockBaseAddr;
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} IDE_REGS_BASE_ADDR;
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/**
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Sets IDE and SATA channels to an enabled or disabled state.
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This service enables or disables the IDE and SATA channels specified by ChannelMask.
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It may ignore ChannelMask setting to enable or disable IDE and SATA channels based on the platform policy.
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The number of the enabled channels will be returned by GET_IDE_REGS_BASE_ADDR() function.
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If the new state is set, then EFI_SUCCESS is returned. If the new state can
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not be set, then EFI_DEVICE_ERROR is returned.
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@param[in] PeiServices The pointer to the PEI Services Table.
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@param[in] This The pointer to this instance of the PEI_ATA_CONTROLLER_PPI.
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@param[in] ChannelMask The bitmask that identifies the IDE and SATA channels to
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enable or disable. This parameter is optional.
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@retval EFI_SUCCESS The IDE or SATA channels were enabled or disabled successfully.
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@retval EFI_DEVICE_ERROR The IDE or SATA channels could not be enabled or disabled.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *PEI_ENABLE_ATA)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_ATA_CONTROLLER_PPI *This,
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IN UINT8 ChannelMask
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);
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/**
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Retrieves the I/O port base addresses for command and control registers of the
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enabled IDE/SATA channels.
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This service fills in the structure poionted to by IdeRegsBaseAddr with the I/O
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port base addresses for the command and control registers of the IDE and SATA
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channels that were previously enabled in EnableAtaChannel(). The number of
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enabled IDE and SATA channels is returned.
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@param[in] PeiServices The pointer to the PEI Services Table.
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@param[in] This The pointer to this instance of the PEI_ATA_CONTROLLER_PPI.
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@param[out] IdeRegsBaseAddr The pointer to caller allocated space to return the
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I/O port base addresses of the IDE and SATA channels
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that were previosuly enabled with EnableAtaChannel().
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@return The number of enabled IDE and SATA channels in the platform.
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**/
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typedef
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UINT32
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(EFIAPI *GET_IDE_REGS_BASE_ADDR)(
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IN EFI_PEI_SERVICES **PeiServices,
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IN PEI_ATA_CONTROLLER_PPI *This,
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OUT IDE_REGS_BASE_ADDR *IdeRegsBaseAddr
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);
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///
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/// This PPI contains services to enable and disable IDE and SATA channels and
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/// retrieves the base I/O port addresses to the enabled IDE and SATA channels.
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///
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struct _PEI_ATA_CONTROLLER_PPI {
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PEI_ENABLE_ATA EnableAtaChannel;
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GET_IDE_REGS_BASE_ADDR GetIdeRegsBaseAddr;
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};
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extern EFI_GUID gPeiAtaControllerPpiGuid;
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