CVS commit: src/sys/arch/arm/arm32

[Jason R Thorpe <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Sun Apr 20 15:42:51 UTC 2003

Modified Files:
        src/sys/arch/arm/arm32: locore.S

Log Message:
Back out previous.  There were several problems with the patch that
was checked in:
* It was not actually disabling the MMU, and so jumping to the
  reset vector would happily cause a panic(), since it would be
  the kernel's reset vector, not the ROM's.
* In the event the system was using high vectors, VECRELOC was not
  getting cleared, which has the potential to wreak havoc when re-entering
  the ROM.
* It was totally broken for CPUs < ARMv4; you still need to disable
  the MMU on those, just need to skip the ARMv4 TLB flush.
* The code that was checked in would only work if the kernel is mapped
  VA==PA.  For systems where the kernel is NOT mapped VA==PA, you only
  get the prefetch depth # of insns (2) after the MMU is turned off before
  you have fix the PC.

Backing out the change fixes rebooting on several evbarm platforms.


To generate a diff of this commit:
cvs rdiff -r1.12 -r1.13 src/sys/arch/arm/arm32/locore.S

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