[lkml]   [1996]   [May]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: SVGA kernel chipset drivers.
> Nope, the kernel can provide a framebuffer device in /dev that
> programs can mmap. IO port access is less critical.
We had this argument before. Some cards dont have a frame buffer.

I/O port access is critical. The "frame buffer" of most cards is actually
a window of 64K onto a mapped space. Its critical enough the X servers do
iopl() rather than ioperm to save a few clocks (2 or 3) for each out/in they

> The real reasons for such a driver are reliability and security.

Which only need kernel support for "restore to text mode".

 \ /
  Last update: 2005-03-22 13:37    [W:0.105 / U:1.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site