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2018-07-25efi_loader: Introduce ms abi vararg helpersAlexander Graf1-0/+8
Varargs differ between sysv and ms abi. On x86_64 we have to follow the ms abi though, so we also need to make sure we use x86_64 varargs helpers. This patch introduces generic efi vararg helpers that adhere to the respective EFI ABI. That way we can deal with them properly from efi loader code and properly interpret variable arguments. This fixes the InstallMultipleProtocolInterfaces tests in the efi selftests on x86_64 for me. Signed-off-by: Alexander Graf <agraf@suse.de>
2018-06-24efi.h: Do not use config optionsAlexander Graf1-13/+11
Currently efi.h determines a few bits of its environment according to config options. This falls apart with the efi stub support which may result in efi.h getting pulled into the stub as well as real U-Boot code. In that case, one may be 32bit while the other one is 64bit. This patch changes the conditionals to use compiler provided defines instead. That way we always adhere to the build environment we're in and the definitions adjust automatically. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: added some comments to describe the __x86_64__ check] Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-06-17efi: stub: Pass EFI GOP information to U-Boot payloadBin Meng1-0/+35
If UEFI BIOS has the graphics output protocol (GOP), let's pass its information to U-Boot payload so that U-Boot can utilize it (eg: an EFI framebuffer driver). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-06-14efi_loader: avoid initializer element is not constantHeinrich Schuchardt1-2/+1
When building with -pedantic the current definition of EFI_GUID() causes an error 'initializer element is not constant'. Currently EFI_GUID() is used both as an anonymous constant and as an intializer. A conversion to efi_guid_t is not allowable when using EFI_GUID() as an initializer. But it is needed when using it as an anonymous constant. We should not use EFI_GUID() for anything but an initializer. So let's introduce a variable where needed and remove the conversion. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2018-01-28efi: Conflict efi_loader with different stub bitnessAlexander Graf1-1/+1
We have 2 users of the EFI headers: efi_loader and the EFI stub. Efi_loader always expects that the bitness of the definitions it uses is identical to the execution. The EFI stub however allows to run x86_64 U-Boot on 32bit EFI and the other way around, so it allows for different bitness of EFI definitions and U-Boot environment. This patch explicitly requests via Kconfig that efi_loader can only be enabled if the bitness is identical. Because we can run efi_loader on x86_64 without EFI stub enabled, it also ensures that this case propagates the correct ABI constraints. Signed-off-by: Alexander Graf <agraf@suse.de>
2017-12-01efi_loader: capitalize EFI_LOCATE_SEARCH_TYPE valuesHeinrich Schuchardt1-3/+3
Constants should be capitalized. So rename the values of enum efi_locate_search_type. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: efi variable supportRob Clark1-0/+19
Add EFI variable support, mapping to u-boot environment variables. Variables are pretty important for setting up boot order, among other things. If the board supports saveenv, then it will be called in ExitBootServices() to persist variables set by the efi payload. (For example, fallback.efi configuring BootOrder and BootXXXX load-option variables.) Variables are *not* currently exposed at runtime, post ExitBootServices. On boards without a dedicated device for storage, which the loaded OS is not trying to also use, this is rather tricky. One idea, at least for boards that can persist RAM across reboot, is to keep a "journal" of modified variables in RAM, and then turn halt into a reboot into u-boot, plus store variables, plus halt. Whatever the solution, it likely involves some per-board support. Mapping between EFI variables and u-boot variables: efi_$guid_$varname = {attributes}(type)value For example: efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_OsIndicationsSupported= "{ro,boot,run}(blob)0000000000000000" efi_8be4df61-93ca-11d2-aa0d-00e098032b8c_BootOrder= "(blob)00010000" The attributes are a comma separated list of these possible attributes: + ro - read-only + boot - boot-services access + run - runtime access NOTE: with current implementation, no variables are available after ExitBootServices, and all are persisted (if possible). If not specified, the attributes default to "{boot}". The required type is one of: + utf8 - raw utf8 string + blob - arbitrary length hex string Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20efi_loader: add file/filesys supportRob Clark1-0/+2
fallback.efi (and probably other things) use UEFI's simple-file-system protocol and file support to search for OS's to boot. Signed-off-by: Rob Clark <robdclark@gmail.com> [agraf: whitespace fixes, unsigned fixes] Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-20part: move efi_guid_tRob Clark1-0/+4
Prep work for next patch. Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-09-18efi_loader: fix typo in include/efi.hHeinrich Schuchardt1-1/+1
Fix typo in teh EFI_BOOT_SERVICES_CODE description. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2017-07-19efi_loader: define all known status codesxypron.glpk@gmx.de1-13/+37
efi.h held only a few EFI status codes. The patch adds the missing definitions for later usage. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2016-11-14x86: Tidy up selection of building the EFI stubSimon Glass1-2/+5
At present we use a CONFIG option in efi.h to determine whether we are building the EFI stub or not. This means that the same header cannot be used for EFI_LOADER support. The CONFIG option will be enabled for the whole build, even when not building the stub. Use a different define instead, set up just for the files that make up the stub. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2016-10-19efi: Use asmlinkage for EFIAPISimon Glass1-1/+2
This is required for x86 and is also correct for ARM (since it is empty). Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2016-09-07efi_loader: provide efi_mem_desc versionMian Yousaf Kaukab1-0/+2
Provide version of struct efi_mem_desc in efi_get_memory_map(). EFI_BOOT_SERVICES.GetMemoryMap() in UEFI specification v2.6 defines memory descriptor version to 1. Linux kernel also expects descriptor version to be 1 and prints following warning during boot if its not: Unexpected EFI_MEMORY_DESCRIPTOR version 0 Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@gmail.com>
2016-08-30x86: efi: Fix EFI 64-bit payload build warningsBin Meng1-12/+20
There are lots of warnings when building EFI 64-bit payload. include/asm-generic/bitops/__fls.h:17:2: warning: left shift count >= width of type if (!(word & (~0ul << 32))) { ^ In fact, U-Boot itself as EFI payload is running in 32-bit mode. So BITS_PER_LONG needs to still be 32, but EFI status codes are 64-bit when booting from 64-bit EFI. Introduce EFI_BITS_PER_LONG to bridge those status codes with U-Boot's BITS_PER_LONG. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-08-30x86: efi: payload: Make EFI payload build againBin Meng1-1/+1
Since commit 73c5c39 "Makefile: Drop unnecessary -dtb suffixes", EFI payload does not build anymore. This fixes the build. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-03-15include/efi_api.h: Add more detailed API definitionsAlexander Graf1-0/+2
The EFI API header is great, but missing a good chunk of function prototype, GUID defines and enum declarations. This patch extends it to cover more of the EFI API. It's still not 100% complete, but sufficient enough for our EFI payload interface. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
2015-08-05efi: Add 64-bit payload supportSimon Glass1-0/+7
Most EFI implementations use 64-bit. Add a way to build U-Boot as a 64-bit EFI payload. The payload unpacks a (32-bit) U-Boot and starts it. This can be enabled for x86 boards at present. Signed-off-by: Simon Glass <sjg@chromium.org> Improvements to how the payload is built: Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
2015-08-05efi: Add support for loading U-Boot through an EFI stubSimon Glass1-0/+4
It is useful to be able to load U-Boot onto a board even if is it already running EFI. This can allow access to the U-Boot command interface, flexible booting options and easier development. The easiest way to do this is to build U-Boot as a binary blob and have an EFI stub copy it into RAM. Add support for this feature, targeting 32-bit initially. Also add a way to detect when U-Boot has been loaded via a stub. This goes in common.h since it needs to be widely available so that we avoid redoing initialisation that should be skipped. Signed-off-by: Simon Glass <sjg@chromium.org> Improvements to how the payload is built: Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com>
2015-08-05efi: Add start-up library codeSimon Glass1-0/+356
When running as an EFI application, U-Boot must request memory from EFI, and provide access to the boot services U-Boot needs. Add library code to perform these tasks. This includes efi_main() which is the entry point from EFI. U-Boot is built as a shared library. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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