empb
—
ELBOX Mediator 1200 PCI bridge driver
empb0 at zbus0
emmem0 at zbus0
empm0 at zbus0
pci* at empb0
options PCI_NETBSD_CONFIGURE
The empb
driver provides support for the PCI bus present
on Mediator 1200 bridge for Amiga 1200.
The empb
driver supports the following hardware:
- ELBOX Mediator PCI 1200
-
- ELBOX Mediator PCI 1200 LT2
-
- ELBOX Mediator PCI 1200 LT4
-
- ELBOX Mediator PCI 1200 SX
-
- ELBOX Mediator PCI 1200 TX
-
- empb: linear space mapping might not work
- The PCI card driver is trying map memory space with the
BUS_SPACE_MAP_LINEAR
flag. Due to the windowed
design of Mediator, it is expected to fail miserably if normal memory
space access methods (e.g., pointer dereference) are used instead of
bus_space(9)
methods.
- empb%d: couldn't find memory space, check your WINDOW jumper
- PCI memory space access is disabled on a hardware level. The
empb
driver will work anyway, but only PCI I/O
space will be accessible. To enable memory space set the WINDOW jumper to
4MB or 8MB.
The empb
device first appeared in
NetBSD 7.0.
The empb
driver was written by Radoslaw
Kujawa
<radoslaw.kujawa@gmail.com>.
It was developed using information obtained through reverse engineering by
Frank Wille and Radoslaw
Kujawa. The authors have no access to official documentation (which is
only available under NDA).
Mediator ZIV might work but is untested.
DMA to host memory is not supported. This is a hardware limitation. It is
possible to implement DMA through bounce buffers in graphics card memory, but
this needs further research.