Examples; Example 1: Mvme2600 Series Board Exhibits Problem - Motorola MVME2600 Series Reference Manual

Universe (VMEbus to PCI) Chip
4

Examples

Example 1: MVME2600 Series Board Exhibits Problem

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Motorola Firmware Engineering has implemented Method 1 in the BSP
(Board Support Package which runs before Open Firmware). Motorola
Firmware Engineering has implemented this firmware work-around for
this hardware problem prior to the PPCOF2.0 RM01 release.
The above notes describing this Universe chip PCI reset problem are for
those customers who replace the MCG firmware with their own. Many of
these customers replace Motorola's firmware, or overwrite the firmware
settings for the Universe chip. These customers may run into this problem.
Customers should not encounter any problems if they leave Motorola's
Open Firmware intact.
Use an MVME2600 series board to exhibit the problem.
Conditions:
MVME260x
running PPCOF2.0 Ir05
all the Universe code which initializes the Universe has been disabled
(not the PCI code, the driver code)
modified probe list to d,c,e,f,10
env parameters set such that LSI0 image will be enabled
1. Manually call each Universe initialize word, to duplicate typical
operation.
With the LSI0 enabled, the registers are:
CTL
80821000 1012000 21012000 3efee000
2. Execute a bye command.
3. Manually enable access to the Universe register set, and read the
LSI0 registers:
CTL
80820000
BS BD
BS BD
0 20000000
TO
TO
0