- moved disk_busy() call from xdstrategy() to xdc_startbuf()
[prevents disk_unbusy panic when disk is loaded (if no
free IOPBs, xdstrategy() would queue the buffer for pickup
by xdcintr() but xdcintr() would never call disk_busy().
xdc_startbuf() is a better place since all bufs are routed
through here] problem detected by girish@dworkin.wustl.edu,
diagnosed and corrected by me.
- move disk_unbusy() call in xdc_remove_iorq() before the call to
XDC_FREE() [don't want to access a data structure that was just put
on a free list]
$NetBSD: README,v 1.2 1994/10/26 09:08:31 cgd Exp $
NetBSD/sun3 supports the following busses:
Bus:
obio - Devices on the motherboard, accessed by having their "registers"
mapped into the kernel's virtual address space
obctl - Devices on the motherboard accessible only via the 'CONTROL' space,
and supporting instructions on the m68k.
obmem - Devices on the motherboard that are mapped into main memory
by the hardware. Only true of some framebuffers.
mainbus - An imaginary bus on which obio, obctl, obmem, and the prom device
all reside.
Devices supported:
'obio' Bus:
Device Type Description
---------------------------------------------------------------------------
zs CHAR zilog 8530 serial ports; used for serial ports, keybd, mouse
le IFNET lance ethernet driver
'obctl' Bus:
Device Type Description
---------------------------------------------------------------------------
idprom CHAR makes idprom contents accessible in user-space
The 'prom' device is just wierd as it isn't a real device, but enough
wrapping so that the prom input/output routines can be used to make
the prom's idea of the console both a tty, and a console in the netbsd
sense.
prom CHAR prom-based tty and console support
718ac5d246