freebsd-dev/sys/i386/isa
Poul-Henning Kamp 91ea86d7e8 Something funny happened on the way to the floppy driver today...
When two drivers share an ISA DMA channel, they both call isa_dmainit()
and the second call fails if DIAGNOSTIC is on.

If isa_dmainit() was already called successfully, just return silently.

This only works if both drivers agree on the bounce buffer size,
but since sharing DMA is usually only possible on very special
hardware and then typically only for devices of the same type (which
would have multiple instances of the same device driver), this is
not a problem in practice.
2004-07-05 20:37:42 +00:00
..
ic Remove old cy driver files. They have been repo-copied to sys/dev/cy and 2004-05-02 05:38:49 +00:00
pcvt Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
atpic_vector.s MFamd64: 2004-05-26 07:43:41 +00:00
atpic.c Add some missing <sys/module.h> includes which are masked by the 2004-05-30 17:57:46 +00:00
ccbque.h Remove __P. 2002-03-20 07:51:46 +00:00
clock.c Add some missing <sys/module.h> includes which are masked by the 2004-05-30 17:57:46 +00:00
elcr.c Add a simple mini-driver for the ELCR register. Originally, the ELCR 2004-05-04 20:07:46 +00:00
elink.c Use __FBSDID(). 2003-06-02 16:32:55 +00:00
elink.h - Change ELINK_ID_PORT; the 3c507 likes 0x100 better. 2003-03-29 13:18:20 +00:00
icu.h - Move some macros from icu.h into atpic.c as that is the only place they 2004-05-11 20:23:24 +00:00
if_el.c Add missing #include <sys/module.h> 2004-05-30 20:34:58 +00:00
if_elreg.h
isa_dma.c Something funny happened on the way to the floppy driver today... 2004-07-05 20:37:42 +00:00
isa_dma.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
isa.c Don't define __RMAN_RESOURCE_VISISBLE. They aren't needed here after 2004-07-03 20:11:49 +00:00
isa.h Remove now obsolete port assignments and sizes. These more properly 2004-07-05 18:39:30 +00:00
lptreg.h
mse.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
nmi.c Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
npx.c Clear any pending exceptions before using frstor (in the non-FXSR case) 2004-06-19 22:24:16 +00:00
pcf.c Remove isa compat stuff. 2004-03-14 23:03:57 +00:00
pmtimer.c Add some missing <sys/module.h> includes which are masked by the 2004-05-30 17:57:46 +00:00
prof_machdep.c Quick fix for overflow when tsc_freq >= 2^31. "int profrate" in struct 2004-05-26 09:43:38 +00:00
spic.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
spicreg.h Device megapatch 1/6: 2004-02-21 19:42:58 +00:00
spkr.c Do the dreaded s/dev_t/struct cdev */ 2004-06-16 09:47:26 +00:00
timerreg.h Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
vesa.c Trim a few things from the dmesg output and stick them under bootverbose to 2004-07-01 07:46:29 +00:00