hpc(4) - NetBSD Manual Pages

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HPC(4)              NetBSD/sgimips Kernel Interfaces Manual             HPC(4)


NAME

     hpc -- SGI High performance Peripheral Controller


SYNOPSIS

     hpc0 at gio0 addr 0x1fb80000
     hpc1 at gio0 addr 0x1fb00000
     hpc2 at gio0 addr 0x1fb98000
     hpc3 at gio0 addr 0x1fb90000


DESCRIPTION

     hpc interfaces the peripherals connected to it to the gio(4) bus.  hpc is
     found on the Personal Iris 4D/3x, Indigo, Indy, Challenge S, Challenge M,
     and Indigo2 machines.

     There are three different numerical revisions of the hpc controller.
     Revisions 1 and 1.5 exist on Personal Iris 4D/3x and Indigo machines, as
     well as GIO32bis expansion cards such as the E++ SEEQ-based Ethernet
     adapter.  Revision 1.5 supports bi-endian operation.  Revision 3 exists
     on Indy, Challenge S, Indigo2, and Challenge M systems.  It is possible
     to have an on-board HPC3 as well as HPC1.5-based GIO32bis adapters in the
     Indy and Challenge S systems.  Additionally, the Challenge S may have a
     secondary HPC3 if the IOPLUS (a.k.a. ''mezzanine'') board is installed.


HARDWARE

           dsclock  DS1286-based RTC

           dpclock  DP8573A-based RTC

           haltwo   HAL2 audio controller

           sq       Seeq 8003 and 80C03 Ethernet controllers

           wdsc     WD33c93 SCSI controller

           zsc      Zilog Z8530 UART


SEE ALSO

     gio(4), imc(4), pic(4)


HISTORY

     The hpc driver first appeared in NetBSD 1.6 with support for Revision 3.
     Revision 1 and 1.5 support was added in NetBSD 2.0.


BUGS

     hpc Revisions 1 and 1.5 support DMA buffer pointers of only 28 bits and
     may therefore only address 256 megabytes of memory.  The R4k Indigo and
     Indy are the only systems that support sufficient memory to illustrate
     this drawback.  A software workaround is not currently implemented.
     Revision 3, with 32 bit pointers, does not have this limitation.

NetBSD 6.0                     December 22, 2006                    NetBSD 6.0