• Huang, Ying's avatar
    x86_64 EFI boot support: EFI frame buffer driver · 7c83172b
    Huang, Ying authored
    This patch adds Graphics Output Protocol support to the kernel.  UEFI2.0 spec
    deprecates Universal Graphics Adapter (UGA) protocol and only Graphics Output
    Protocol (GOP) is produced.  Therefore, the boot loader needs to query the
    UEFI firmware with appropriate Output Protocol and pass the video information
    to the kernel.  As a result of GOP protocol, an EFI framebuffer driver is
    needed for displaying console messages.  The patch adds a EFI framebuffer
    driver.  The EFI frame buffer driver in this patch is based on the Intel Mac
    framebuffer driver.
    
    The ELILO bootloader takes care of passing the video information as
    appropriate for EFI firmware.
    
    The framebuffer driver has been tested in i386 kernel and x86_64 kernel on EFI
    platform.
    Signed-off-by: default avatarChandramouli Narayanan <mouli@linux.intel.com>
    Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Andi Kleen <ak@suse.de>
    Cc: "Antonino A. Daplas" <adaplas@pol.net>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    7c83172b
screen_info.h 2.59 KB