UEFI specification says 'HD(Partition,Type,Signature,Start, Size)'. These values are specific to you partition table.
gArmPlatformTokenSpaceGuid.PcdDefaultBootDevicePath is specific to the ARM BDS. It is to create a default boot entry when you start your system for a first time. It is not (necessary) relevant to boot Linux or run SCT on your platform. I would say you have the appropriate list of EFI modules to get FAT support (if you already have SD support in your UEFI firmware). From: Meenakshi Aggarwal [mailto:meenakshi.aggar...@freescale.com] Sent: 16 June 2015 10:10 To: edk2-devel@lists.sourceforge.net Subject: [edk2] Filesystem support Hi All, I want to boot linux and run SCT from SD card. I have seen BeagleBoard package code which is booting linux from SD. I got confused with entry: gArmPlatformTokenSpaceGuid.PcdDefaultBootDevicePath|L"VenHw(B615F1F5-5088-43CD-809C-A16E52487D00)/HD(1,MBR,0x00000000,0x3F,0x19FC0)/zImage" from where are 0x3F and 0x19FC0 came. Is it some default value for start address and size? Do I need to create an FV entry for this? Also what all I need to include in my dsc and fdf file to enable support of filesystem. I can see following listed files for filesystem support (reference : BeagleBoard) Changes in FDF: # # FAT filesystem + GPT/MBR partitioning # INF MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf INF MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf INF FatBinPkg/EnhancedFatDxe/Fat.inf INF MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf Changes in DSC # # FAT filesystem + GPT/MBR partitioning # MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf Thanks & regards Meenakshi Aggarwal -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2548782
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