src-test2/sys/dev/fb/vesa.c, branch release/8.2.0_cvs

Copy releng/8.2 to release/8.2.0 for 8.2-RELEASE.

2011-02-16T16:18:46Z

Approved by: re (implicit) This commit was manufactured to restore the state of the 8.2-RELEASE image.

MFC: r209737, r209740

2010-07-20T18:43:15Z

Fix a possible null pointer dereference and plug a possible memory leak.

MFC: r208279

2010-05-24T01:46:06Z

Restore the previous video mode after VESA BIOS POST, just in case.

MFC: r208276

2010-05-24T01:44:30Z

Remove unnecessary pointer increment. A wrong pointer may be passed to free(9) and it can cause kernel panic when there are multiple graphics controllers in the system.

MFC: r206384

2010-04-26T19:19:29Z

Allocate memory for VBE info block with malloc(9), not as static local.

MFC: r205557, r205558, r205564, r205566, r205604, r205653

2010-03-31T15:45:11Z

Sync. pixel mode support for VESA and VGA frame buffers with HEAD. - Map entire video memory again. Although we do not use them all directly, it seems VGA renderer may access unmapped memory region and cause kernel panic. - Fall back to VGA palette functions if VESA function failed and DAC is still in 6-bit mode. Although we have to check non-VGA compatibility bit here, it seems there are too many broken VESA BIOSes out to rely on it. - Be careful when we determine bytes per scan line information. We compare mode table data against minimum value. If the mode table does not make sense, we set the minimum in the mode info. - Teach VGA framebuffer about 8-bit palette format for VESA. - Add my copyright here.

MFC x86emu/x86bios emulator and make previously i386 only dpms and vesa

2010-03-02T01:56:55Z

framebuffer driver, etc. work on FreeBSD/amd64. A significant amount of improvements were done by jkim@ during the recent months to make vesa(4) work better, over the initial code import. This work is based on OpenBSD's x86emu implementation and contributed by paradox and swell.k at gmail com. Hopefully I have stolen all their work to 8-STABLE :) All bugs in this commit are mine, as usual.