HPC(4) | Device Drivers Manual (sgimips) | 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 sgimips/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

sgimips/gio(4), sgimips/imc(4), sgimips/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.

February 17, 2017 | NetBSD 10.0