4-16
Universe (VMEbus to PCI) Chip
4
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.
Examples
Example 1: MVME2600 Series Board Exhibits Problem
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 BS BD TO
80821000 1012000 21012000 3efee000
2. Execute a bye command.
3. Manually enable access to the Universe register set, and read the
LSI0 registers:
CTL BS BD TO
80820000 0 20000000 0
Содержание MVME2700 Series
Страница 1: ...MVME2600 2700 Series Single Board Computer Programmer s Reference Guide V2600A PG2 ...
Страница 13: ...xiv ...
Страница 15: ...xvi ...
Страница 67: ...1 50 Board Description and Memory Maps 1 ...
Страница 70: ...Introduction 2 3 2 Four 31 bit tick timers Two 64 bit general purpose registers for cross processor messaging ...
Страница 151: ...2 84 Raven PCI Host Bridge Multi Processor Interrupt Controller Chip 2 ...
Страница 215: ...3 64 Falcon ECC Memory Controller Chip Set 3 ...
Страница 277: ...Glossary GL 14 G L O S S A R Y ...