Use fast clearing of visible screen for splash

memset uses rep stosb on x86 during boot, with memory
not set to write-combining, which makes it slow.

Instead we do aligned writes of 2 x four bytes at once.
Only clear the minimum of size and width * height * 4
UEFI framebuffer size can be huge, upto 512MB here,
and rep stosb seems to be around 25-30MB/s

This is written as generic as possible to work on
old compilers and different platforms, without
expecting boot memset to be optimized.

This makes it almost unnoticable compared to not
clearing.

Don't clear video mem on UEFI, efi video mode refactor

Writes to videomem is slow without memory remapping
Can't do the mapping without leaving UEFI, so skipping
the clear. Afaict it should always be cleared by UEFI

This saves ~10 seconds of booting on my machine
(1920*1080*4 bytes)

EFI video mode (should have been it's own commit)
* Only do strcmp if there are enough params
* break when found

Rework the ConsoleDevice to be a full featured window based console.
Only looses high intensity color from the plain console, but doesn't eat keystrokes, and a 2nd window opens for dprintf stuff.
Only Amiga makes it possible ;-)
http://revolf.free.fr/beos/shots/shot_haiku_loader_amiga_m68k_004.png


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39264 a95241bf-73f2-0310-859d-f6bbb57e9c96

Some more work to get video support working, add generic code to support the boot splash in.
However all modes available are planar, and there doesn't seem to be a way to tell it in the kernel args framebuffer struct...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39255 a95241bf-73f2-0310-859d-f6bbb57e9c96

Display flags and interlace in the mode menu items.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39136 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix setting console position.
Generate a list of video modes, though there seem to be some dups and missing ones... The Nominal resolution doesn't mean it can't be better.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39135 a95241bf-73f2-0310-859d-f6bbb57e9c96

s/amicalls/rom_calls/


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38944 a95241bf-73f2-0310-859d-f6bbb57e9c96

Stub out some more of the platform code.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38921 a95241bf-73f2-0310-859d-f6bbb57e9c96

Rework the ConsoleDevice to be a full featured window based console.
Only looses high intensity color from the plain console, but doesn't eat keystrokes, and a 2nd window opens for dprintf stuff.
Only Amiga makes it possible ;-)
http://revolf.free.fr/beos/shots/shot_haiku_loader_amiga_m68k_004.png


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39264 a95241bf-73f2-0310-859d-f6bbb57e9c96

Some more work to get video support working, add generic code to support the boot splash in.
However all modes available are planar, and there doesn't seem to be a way to tell it in the kernel args framebuffer struct...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39255 a95241bf-73f2-0310-859d-f6bbb57e9c96

Display flags and interlace in the mode menu items.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39136 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix setting console position.
Generate a list of video modes, though there seem to be some dups and missing ones... The Nominal resolution doesn't mean it can't be better.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39135 a95241bf-73f2-0310-859d-f6bbb57e9c96

s/amicalls/rom_calls/


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38944 a95241bf-73f2-0310-859d-f6bbb57e9c96

Stub out some more of the platform code.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38921 a95241bf-73f2-0310-859d-f6bbb57e9c96