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EMPB(4) NetBSD/amiga Kernel Interfaces Manual EMPB(4)
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by Kimmo Suominen.
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empb -- ELBOX Mediator 1200 PCI bridge driver
empb0 at zbus0
emmem0 at zbus0
empm0 at zbus0
pci* at empb0
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
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.
amiga/em4k(4), amiga/mppb(4), amiga/p5pb(4), pci(4)
The empb device first appeared in NetBSD 7.0.
The empb driver was written by Radoslaw Kujawa
<firstname.lastname@example.org>. 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
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 mem-
ory, but this needs further research.
NetBSD 9.99 February 17, 2017 NetBSD 9.99