vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Use write-combining MTRR to speed up video with buggy BIOSes.

Browse source 
* grub-core/video/i386/pc/vbe.c (framebuffer): New member mtrr.
	(cpuid): New define.
	(rdmsr): Likewise.
	(wrmsr): Likewise.
	(mtrr_base): Likewise.
	(mtrr_mask): Likewise.
	(grub_vbe_enable_mtrr_entry): New function.
	(grub_vbe_enable_mtrr): Likewise.
	(grub_vbe_disable_mtrr): Likewise.
	(grub_vbe_bios_set_display_start): Disable mtrr when handing the
	control off to BIOS.
	(grub_video_vbe_init): Fill mtrr.
	(grub_video_vbe_fini): Disable mtrr.
	(grub_video_vbe_get_info_and_fini): Likewise.
	(grub_video_vbe_setup): Enable mtrr.
This commit is contained in:
Colin Watson 2012-02-27 22:31:51 +01:00 • committed by Vladimir 'phcoder' Serbinenko
parent e3c78337c3
commit cfe456dc03
2 changed files with 214 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

20
ChangeLog
View file

@ -1,3 +1,23 @@
2012-02-27 Colin Watson <cjwatson@ubuntu.com>
Use write-combining MTRR to speed up video with buggy BIOSes.
* grub-core/video/i386/pc/vbe.c (framebuffer): New member mtrr.
(cpuid): New define.
(rdmsr): Likewise.
(wrmsr): Likewise.
(mtrr_base): Likewise.
(mtrr_mask): Likewise.
(grub_vbe_enable_mtrr_entry): New function.
(grub_vbe_enable_mtrr): Likewise.
(grub_vbe_disable_mtrr): Likewise.
(grub_vbe_bios_set_display_start): Disable mtrr when handing the
control off to BIOS.
(grub_video_vbe_init): Fill mtrr.
(grub_video_vbe_fini): Disable mtrr.
(grub_video_vbe_get_info_and_fini): Likewise.
(grub_video_vbe_setup): Enable mtrr.
2012-02-27 Colin Watson <cjwatson@ubuntu.com>
* include/grub/partition.h (grub_partition_map): Change prototype of