NAME
百度 机构改革是一个过程，不会一蹴而就，也不会一劳永逸。pcmcia, pcic
— introduction to PCMCIA (PC
Card) support
SYNOPSIS
# i386
pcic0 at isa? port 0x3e0 iomem 0xd0000 iosiz 0x10000
pcic1 at isa? port 0x3e2 iomem 0xe0000 iosiz 0x4000
pcic2 at isa? port 0x3e4 iomem 0xe0000 iosiz 0x4000
pcic* at isapnp?
pcic* at pci? dev?
pcmcia* at pcic?
# i386
tcic0 at isa? port 0x240 iomem 0xd0000 iosiz 0x10000
pcmcia* at tcic?
# luna88k
pcic0 at cbus? port 0x3e0 iomem 0xd0000 iosiz 0x10000
pcmcia* at pcic?
# sparc64
stp* at sbus?
pcmcia* at stp?
# all architectures
cbb* at pci?
cardslot* at cbb? flags 0x0000
pcmcia* at cardslot?
DESCRIPTION
The pcmcia subsystem provides
machine-independent bus support and drivers for PCMCIA (PC Card)
devices.
OpenBSD provides support for the following devices. Note that not all architectures support all devices.
Serial interfaces and modems
- com(4)
- serial communications interface
Wired network interfaces
Wireless network interfaces
SCSI controllers
- aic(4)
- Adaptec AIC-6260 and AIC-6360 SCSI interface
IDE controllers
- wdc(4)
- WD100x compatible hard disk controller driver
The supported PCMCIA controllers are those that are i82365 compatible.
NOTES
On some pcmcia adapters, for instance the
sbus(4)-based
stp(4), the
pcmcia bus will be mapped in big-endian format
instead of the natural (and preferred) little endian format. Unfortunately
such controllers lack the hardware facility to swap bytes, and it is not
efficient to convert all drivers to always know about this. While 8 bit
drivers can invisibly work on such a bus, 16 bit drivers will need
modification to handle this. So far,
wi(4) is the only
driver to require these modifications.
If the pcmcia adapter is not
detected, or if pcmcia events (such as card
insertion) do not occur, there may be a PCI card BIOS mapped in the same
memory space the pcmcia driver is configured to use
(this is often the case with Ethernet card boot ROMs). The output from
dmesg(8)
should contain a line beginning with “bios0” that lists the
memory address and size of mapped regions. If there is a conflict, you can
use boot_config(8) to change the iomem parameter of the
pcic device to a non-overlapping address, such as 0xd8000
for pcic0. Some
experimentation may be required to find a working value; in some cases the
size parameter of the pcic device may need to be decreased
to avoid a conflict.
SEE ALSO
HISTORY
The pcmcia driver appeared in
OpenBSD 2.3.