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196 lines
6.5 KiB
C
196 lines
6.5 KiB
C
/** @file
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This file defines the Legacy SPI Flash Protocol.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Revision Reference:
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This Protocol was introduced in UEFI PI Specification 1.6.
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**/
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#ifndef __LEGACY_SPI_FLASH_PROTOCOL_H__
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#define __LEGACY_SPI_FLASH_PROTOCOL_H__
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#include <Protocol/SpiNorFlash.h>
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///
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/// Global ID for the Legacy SPI Flash Protocol
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///
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#define EFI_LEGACY_SPI_FLASH_PROTOCOL_GUID \
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{ 0xf01bed57, 0x04bc, 0x4f3f, \
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{ 0x96, 0x60, 0xd6, 0xf2, 0xea, 0x22, 0x82, 0x59 }}
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typedef struct _EFI_LEGACY_SPI_FLASH_PROTOCOL EFI_LEGACY_SPI_FLASH_PROTOCOL;
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/**
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Set the BIOS base address.
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This routine must be called at or below TPL_NOTIFY.
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The BIOS base address works with the protect range registers to protect
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portions of the SPI NOR flash from erase and write operat ions.
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The BIOS calls this API prior to passing control to the OS loader.
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@param[in] This Pointer to an EFI_LEGACY_SPI_FLASH_PROTOCOL data
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structure.
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@param[in] BiosBaseAddress The BIOS base address.
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@retval EFI_SUCCESS The BIOS base address was properly set
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@retval EFI_ACCESS_ERROR The SPI controller is locked
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@retval EFI_INVALID_PARAMETER BiosBaseAddress > This->MaximumOffset
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@retval EFI_UNSUPPORTED The BIOS base address was already set or not a
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legacy SPI host controller
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_SPI_FLASH_PROTOCOL_BIOS_BASE_ADDRESS) (
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IN CONST EFI_LEGACY_SPI_FLASH_PROTOCOL *This,
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IN UINT32 BiosBaseAddress
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);
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/**
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Clear the SPI protect range registers.
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This routine must be called at or below TPL_NOTIFY.
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The BIOS uses this routine to set an initial condition on the SPI protect
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range registers.
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@param[in] This Pointer to an EFI_LEGACY_SPI_FLASH_PROTOCOL data structure.
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@retval EFI_SUCCESS The registers were successfully cleared
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@retval EFI_ACCESS_ERROR The SPI controller is locked
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@retval EFI_UNSUPPORTED Not a legacy SPI host controller
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**/
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typedef EFI_STATUS
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(EFIAPI *EFI_LEGACY_SPI_FLASH_PROTOCOL_CLEAR_SPI_PROTECT) (
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IN CONST EFI_LEGACY_SPI_FLASH_PROTOCOL *This
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);
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/**
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Determine if the SPI range is protected.
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This routine must be called at or below TPL_NOTIFY.
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The BIOS uses this routine to verify a range in the SPI is protected.
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@param[in] This Pointer to an EFI_LEGACY_SPI_FLASH_PROTOCOL data
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structure.
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@param[in] BiosAddress Address within a 4 KiB block to start protecting.
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@param[in] BlocksToProtect The number of 4 KiB blocks to protect.
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@retval TRUE The range is protected
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@retval FALSE The range is not protected
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**/
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typedef
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BOOLEAN
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(EFIAPI *EFI_LEGACY_SPI_FLASH_PROTOCOL_IS_RANGE_PROTECTED) (
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IN CONST EFI_LEGACY_SPI_FLASH_PROTOCOL *This,
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IN UINT32 BiosAddress,
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IN UINT32 BlocksToProtect
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);
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/**
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Set the next protect range register.
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This routine must be called at or below TPL_NOTIFY.
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The BIOS sets the protect range register to prevent write and erase
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operations to a portion of the SPI NOR flash device.
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@param[in] This Pointer to an EFI_LEGACY_SPI_FLASH_PROTOCOL data
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structure.
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@param[in] BiosAddress Address within a 4 KiB block to start protecting.
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@param[in] BlocksToProtect The number of 4 KiB blocks to protect.
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@retval EFI_SUCCESS The register was successfully updated
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@retval EFI_ACCESS_ERROR The SPI controller is locked
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@retval EFI_INVALID_PARAMETER BiosAddress < This->BiosBaseAddress, or
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@retval EFI_INVALID_PARAMETER BlocksToProtect * 4 KiB
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> This->MaximumRangeBytes, or
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BiosAddress - This->BiosBaseAddress
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+ (BlocksToProtect * 4 KiB)
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> This->MaximumRangeBytes
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@retval EFI_OUT_OF_RESOURCES No protect range register available
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@retval EFI_UNSUPPORTED Call This->SetBaseAddress because the BIOS
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base address is not set Not a legacy SPI host
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controller
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_SPI_FLASH_PROTOCOL_PROTECT_NEXT_RANGE) (
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IN CONST EFI_LEGACY_SPI_FLASH_PROTOCOL *This,
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IN UINT32 BiosAddress,
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IN UINT32 BlocksToProtect
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);
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/**
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Lock the SPI controller configuration.
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This routine must be called at or below TPL_NOTIFY.
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This routine locks the SPI controller's configuration so that the software is
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no longer able to update:
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* Prefix table
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* Opcode menu
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* Opcode type table
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* BIOS base address
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* Protect range registers
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@param[in] This Pointer to an EFI_LEGACY_SPI_FLASH_PROTOCOL data structure.
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@retval EFI_SUCCESS The SPI controller was successfully locked
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@retval EFI_ALREADY_STARTED The SPI controller was already locked
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@retval EFI_UNSUPPORTED Not a legacy SPI host controller
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_SPI_FLASH_PROTOCOL_LOCK_CONTROLLER) (
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IN CONST EFI_LEGACY_SPI_FLASH_PROTOCOL *This
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);
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///
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/// The EFI_LEGACY_SPI_FLASH_PROTOCOL extends the EFI_SPI_NOR_FLASH_PROTOCOL
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/// with APls to support the legacy SPI flash controller.
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///
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struct _EFI_LEGACY_SPI_FLASH_PROTOCOL {
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///
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/// This protocol manipulates the SPI NOR flash parts using a common set of
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/// commands.
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///
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EFI_SPI_NOR_FLASH_PROTOCOL FlashProtocol;
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//
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// Legacy flash (SPI host) controller support
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//
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///
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/// Set the BIOS base address.
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///
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EFI_LEGACY_SPI_FLASH_PROTOCOL_BIOS_BASE_ADDRESS BiosBaseAddress;
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///
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/// Clear the SPI protect range registers.
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///
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EFI_LEGACY_SPI_FLASH_PROTOCOL_CLEAR_SPI_PROTECT ClearSpiProtect;
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///
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/// Determine if the SPI range is protected.
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///
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EFI_LEGACY_SPI_FLASH_PROTOCOL_IS_RANGE_PROTECTED IsRangeProtected;
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///
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/// Set the next protect range register.
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///
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EFI_LEGACY_SPI_FLASH_PROTOCOL_PROTECT_NEXT_RANGE ProtectNextRange;
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///
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/// Lock the SPI controller configuration.
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///
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EFI_LEGACY_SPI_FLASH_PROTOCOL_LOCK_CONTROLLER LockController;
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};
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extern EFI_GUID gEfiLegacySpiFlashProtocolGuid;
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#endif // __LEGACY_SPI_FLASH_PROTOCOL_H__
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