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authorHuang, Ying <ying.huang@intel.com>2007-11-28 16:21:55 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-29 09:24:54 -0800
commit7c83172b98e569d9aabf947d8b3b089dadb2ff46 (patch)
tree674db31e73f5ae5f65e459455b63ac61ff5bff96 /include/linux
parentf78ba15705a5ef36b55c4e3142724e2211cb1733 (diff)
x86_64 EFI boot support: EFI frame buffer driver
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: Chandramouli Narayanan <mouli@linux.intel.com> Signed-off-by: Huang 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/screen_info.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/screen_info.h b/include/linux/screen_info.h
index 827b85bbf38..1ee2c05142f 100644
--- a/include/linux/screen_info.h
+++ b/include/linux/screen_info.h
@@ -63,6 +63,8 @@ struct screen_info {
#define VIDEO_TYPE_PMAC 0x60 /* PowerMacintosh frame buffer. */
+#define VIDEO_TYPE_EFI 0x70 /* EFI graphic mode */
+
#ifdef __KERNEL__
extern struct screen_info screen_info;