Changeset 9966204 in rtems

2001-05-14 Till Straumann <strauman@…>

Per PR216, "libbsp/powerpc/shared" BSP has been modified considerably
with the goal to make it more flexible and reusable by other
BSPs. The main strategies were:

• eliminate hardcoded base addresses; devices use offsets and a BSP defined base address.
• separate functionality into different files (e.g. reboot from inch.c to reboot.c) which can be overridden by a 'derived' BSP.
• separate initialization code into separate files (e.g. PCI bridge detection/initialization was separated from the more generic PCI access routines), also to make it easier for 'derived' BSPs to substitute their own initialization code.

There are also a couple of enhancements and fixes:

• IRQ handling code now has a hook for attaching a VME bridge.
• OpenPIC is now explicitely initialized (polarities, senses). Eliminated the implicit assumption on the presence of an ISA PIC.
• UART and console driver now supports more than 1 port. The current maximum of 2 can easily be extended by enlarging a table (it would even be easier if the ISR API was not broken by design).
• fixed polled_io.c so it correctly supports console on COM2
• fixed TLB invalidation code (start.S).
• exception handler prints a stack backtrace.
• added BSP_pciFindDevice() to scan the pci bus for a particular vendor/device/instance.