Hardware And Firmware Initialization - Emerson MVME51005E Installation And Use Manual

For example, if a breakpoint has been specified, then control returns to the debugger when the
breakpoint is encountered during execution of the user program. Alternately, the user program
could return to the debugger by means of the System Call Handler routine RETURN (described
in the PPCBug Firmware Package User's Manual). For more about this, refer to the GD, GO and
GT command descriptions in the PPCBug Firmware Package User's Manual, listed in
D, Related Documentation
A debugger command is made up of the following parts:
❏
❏
❏
❏

Hardware and Firmware Initialization

The debugger performs the hardware and firmware initialization process. This process occurs
each time the MVME5100 is reset or powered up. The steps listed below are a high-level
outline; be aware that not all of the detailed steps are listed.
1. Sets MPU.MSR to known value.
2. Invalidates the MPU's data/instruction caches.
3. Clears all segment registers of the MPU.
4. Clears all block address translation registers of the MPU.
5. Initializes the MPU-bus-to-PCI-bus bridge device.
6. Initializes the PCI-bus-to-ISA-bus bridge device.
7. Calculates the external bus clock speed of the MPU.
8. Delays for 750 milliseconds.
9. Determines the CPU base board type.
10. Sizes the local read/write memory (that is, DRAM).
11. Initializes the read/write memory controller. Sets base address of memory to
0x00000000.
12. Retrieves the speed of read/write memory.
13. Initializes the read/write memory controller with the speed of read/write memory.
14. Retrieves the speed of read only memory (that is, Flash).
15. Initializes the read only memory controller with the speed of read only memory.
16. Enables the MPU's instruction cache.
17. Copies the MPU's exception vector table from 0xFFF00000 to 0x00000000.
18. Verifies MPU type.
.
The command name, either uppercase or lowercase (for example, MD or md)
Any required arguments, as specified by command
At least one space before the first argument. Precede all other arguments with
either a space or comma.
One or more options. Precede an option or a string of options with a semicolon (;).
If no option is entered, the command's default option conditions are used.
MVME51005E Single Board Computer Installation and Use (6806800A38B)
3 PPCBug Firmware
Appendix
19