empm(4) - NetBSD Manual Pages

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EMPB(4)              NetBSD/amiga Kernel Interfaces Manual             EMPB(4)

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.
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 <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 mem- ory, but this needs further research. NetBSD 10.99 February 17, 2017 NetBSD 10.99
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