Following sets of patches add EFI/UEFI (Unified Extensible Firmware
Interface) runtime services support to x86_64 architecture. The
patches have been tested against 2.6.24-rc1 kernel on Intel platforms
with EFI1.10 and UEFI2.0 firmware.
v4:
- EFI boot parameters are extended for 64-bit EFI in a 32-bit EFI
compatible way.
- Add EFI runtime services document.
v3:
- Remove E820_RUNTIME_CODE, the EFI memory map is used to deal with
EFI runtime code area.
- The method used to make EFI runtime code area executable is change:
a. Before page allocation is usable, the PMD of direct mapping is
changed temporarily before and after each EFI call.
b. After page allocation is usable, change_page_attr_addr is used to
change corresponding page attribute.
- Use fixmap to map EFI memory mapped IO memory area to make kexec
workable.
- Add a kernel command line option "noefi" to make it possible to turn
off EFI runtime services support.
- Function pointers are used for EFI time runtime service.
- EFI reboot runtime service is embedded into the framework of
reboot_type.
- A kernel command line option "noefi_time" is added to make it
possible to fall back to CMOS based implementation.
v2:
- The EFI callwrapper is re-implemented in assembler.
Best Regards,
Huang Ying
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