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https://github.com/AsahiLinux/u-boot
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05ef48a248
This patch provides * a uclass for EFI drivers * a EFI driver for block devices For each EFI driver the uclass * creates a handle * adds the driver binding protocol The uclass provides the bind, start, and stop entry points for the driver binding protocol. In bind() and stop() it checks if the controller implements the protocol supported by the EFI driver. In the start() function it calls the bind() function of the EFI driver. In the stop() function it destroys the child controllers. The EFI block driver binds to controllers implementing the block io protocol. When the bind function of the EFI block driver is called it creates a new U-Boot block device. It installs child handles for all partitions and installs the simple file protocol on these. The read and write functions of the EFI block driver delegate calls to the controller that it is bound to. A usage example is as following: U-Boot loads the iPXE snp.efi executable. iPXE connects an iSCSI drive and exposes a handle with the block IO protocol. It calls ConnectController. Now the EFI block driver installs the partitions with the simple file protocol. iPXE uses the simple file protocol to load Grub or the Linux Kernel. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> [agraf: add comment on calloc len] Signed-off-by: Alexander Graf <agraf@suse.de>
13 lines
300 B
Makefile
13 lines
300 B
Makefile
#
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# (C) Copyright 2017 Heinrich Schuchardt
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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# This file only gets included with CONFIG_EFI_LOADER set, so all
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# object inclusion implicitly depends on it
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obj-y += efi_uclass.o
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ifeq ($(CONFIG_BLK)$(CONFIG_PARTITIONS),yy)
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obj-y += efi_block_device.o
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endif
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