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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 09:44:51 +0400 |
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| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-15 09:44:51 +0400 |
| commit | 43d2548bb2ef7e6d753f91468a746784041e522d (patch) | |
| tree | 77d13fcd48fd998393abb825ec36e2b732684a73 /Documentation/x86/x86_64/uefi.txt | |
| parent | 585583d95c5660973bc0cf64add517b040acd8a4 (diff) | |
| parent | 85082fd7cbe3173198aac0eb5e85ab1edcc6352c (diff) | |
| download | linux-43d2548bb2ef7e6d753f91468a746784041e522d.tar.xz | |
Merge commit '85082fd7cbe3173198aac0eb5e85ab1edcc6352c' into test-build
Manual fixup of:
arch/powerpc/Kconfig
Diffstat (limited to 'Documentation/x86/x86_64/uefi.txt')
| -rw-r--r-- | Documentation/x86/x86_64/uefi.txt | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/x86/x86_64/uefi.txt b/Documentation/x86/x86_64/uefi.txt new file mode 100644 index 000000000000..a5e2b4fdb170 --- /dev/null +++ b/Documentation/x86/x86_64/uefi.txt @@ -0,0 +1,42 @@ +General note on [U]EFI x86_64 support +------------------------------------- + +The nomenclature EFI and UEFI are used interchangeably in this document. + +Although the tools below are _not_ needed for building the kernel, +the needed bootloader support and associated tools for x86_64 platforms +with EFI firmware and specifications are listed below. + +1. UEFI specification: http://www.uefi.org + +2. Booting Linux kernel on UEFI x86_64 platform requires bootloader + support. Elilo with x86_64 support can be used. + +3. x86_64 platform with EFI/UEFI firmware. + +Mechanics: +--------- +- Build the kernel with the following configuration. + CONFIG_FB_EFI=y + CONFIG_FRAMEBUFFER_CONSOLE=y + If EFI runtime services are expected, the following configuration should + be selected. + CONFIG_EFI=y + CONFIG_EFI_VARS=y or m # optional +- Create a VFAT partition on the disk +- Copy the following to the VFAT partition: + elilo bootloader with x86_64 support, elilo configuration file, + kernel image built in first step and corresponding + initrd. Instructions on building elilo and its dependencies + can be found in the elilo sourceforge project. +- Boot to EFI shell and invoke elilo choosing the kernel image built + in first step. +- If some or all EFI runtime services don't work, you can try following + kernel command line parameters to turn off some or all EFI runtime + services. + noefi turn off all EFI runtime services + reboot_type=k turn off EFI reboot runtime service +- If the EFI memory map has additional entries not in the E820 map, + you can include those entries in the kernels memory map of available + physical RAM by using the following kernel command line parameter. + add_efi_memmap include EFI memory map of available physical RAM |