CVS commit: src/sys/arch/arm/footbridge

[Chris Gilbert <chris%netbsd.org@localhost>]

Module Name:    src
Committed By:   chris
Date:           Fri Dec 14 11:08:04 UTC 2007

Modified Files:
        src/sys/arch/arm/footbridge: dc21285reg.h footbridge.c footbridge_pci.c

Log Message:
Fix for PR cats/18026.

cats was never able to dump a kernel core dump because reading from
VGA addresses (0xb8000) was causing the system to hang.

To workaround this reprogram the footbridge to map the memory to appear on
the PCI bus at 0x20000000, rather than at 0x0.  Also configure the pci bus
to have a DMA range so that data is mapped correctly.

Note that -current kernels seem to hang when unmounting the fs.  This
is a seperate issue, and appears to be because interrupts need to be
enabled to unmount filesystems.

So using reboot 0x104 does work, as it does a sync without unmounting the
filesystems.

Also arm savecore doesn't do anything with the memroy dump, as on arm we
currently just dump the raw memory, there's no header block to indicate
memory sizes or other useful information.


To generate a diff of this commit:
cvs rdiff -r1.4 -r1.5 src/sys/arch/arm/footbridge/dc21285reg.h
cvs rdiff -r1.17 -r1.18 src/sys/arch/arm/footbridge/footbridge.c
cvs rdiff -r1.13 -r1.14 src/sys/arch/arm/footbridge/footbridge_pci.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.