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This is a common SPI Flash library used for the Intel platform that supports SPI hardware sequence. This library provides actual SPI flash operation via Intel PCH SPI controller. Signed-off-by: Guo Dong <guo.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Maurice Ma <maurice.ma@intel.com> Cc: Benjamin You <benjamin.you@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Reviewed-by: Benjamin You <benjamin.you@intel.com>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
/** @file
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This file defines the hob structure for the SPI flash variable info.
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Copyright (c) 2017 - 2021, 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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#ifndef SPI_FLASH_INFO_GUID_H_
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#define SPI_FLASH_INFO_GUID_H_
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#include <IndustryStandard/Acpi.h>
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//
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// SPI Flash infor hob GUID
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//
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extern EFI_GUID gSpiFlashInfoGuid;
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//
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// Set this bit if platform need disable SMM write protection when writing flash
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// in SMM mode using this method: -- AsmWriteMsr32 (0x1FE, MmioRead32 (0xFED30880) | BIT0);
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//
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#define FLAGS_SPI_DISABLE_SMM_WRITE_PROTECT BIT0
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//
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// Reuse ACPI definition
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//
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typedef EFI_ACPI_3_0_GENERIC_ADDRESS_STRUCTURE PLD_GENERIC_ADDRESS;
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#define SPACE_ID_PCI_CONFIGURATION EFI_ACPI_3_0_PCI_CONFIGURATION_SPACE
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#define REGISTER_BIT_WIDTH_DWORD EFI_ACPI_3_0_DWORD
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typedef struct {
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UINT8 Revision;
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UINT8 Reserved;
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UINT16 Flags;
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PLD_GENERIC_ADDRESS SpiAddress;
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} SPI_FLASH_INFO;
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#endif
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