freebsd-dev/sys/amd64/isa
Sujal Patel 1dce4e5d60 Add a lock for DMA Channels to prevent two devices from using the same DMA
channel at the same time.  The functions isa_dma_acquire() and
isa_dma_release() should be used in all ISA drivers which call isa_dmastart().
This can be used more generally to register the usage of DMA channels in
any driver, but it is required for drivers using isa_dmastart() and friends.

Clean up sanity checks, error messages, etc.
Remove isa_dmadone_nobounce(), it is no longer needed

Reviewed by:	bde
1996-04-08 19:38:57 +00:00
..
clock.c Fix adjkerntz expression priority 1996-04-05 18:56:10 +00:00
icu.h Laptop Advanced Power Management support by HOSOKAWA Tatsumi. 1994-10-01 02:56:21 +00:00
isa.c Add a lock for DMA Channels to prevent two devices from using the same DMA 1996-04-08 19:38:57 +00:00
isa.h Fix a bunch of spelling errors in the comment fields of 1996-01-30 23:02:38 +00:00
npx.c Choose a different name to hold the option definition.. The original one 1996-01-06 23:10:57 +00:00
timerreg.h Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some 1993-10-16 13:48:52 +00:00
vector.s Killed religous FASTER_NOP again. 1996-03-31 03:31:29 +00:00
vector.S Killed religous FASTER_NOP again. 1996-03-31 03:31:29 +00:00