CVS commit: syssrc/sys/arch/arm/arm

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

Module Name:    syssrc
Committed By:   thorpej
Date:           Sun Nov 11 17:18:27 UTC 2001

Modified Files:
        syssrc/sys/arch/arm/arm: cpufunc_asm_xscale.S

Log Message:
Some fixes/cleanup to the XScale cache clean code:
* Define a CPWAIT macro as described in the i80200 manual and use it,
  rather than replicating the code in a few places.
* The i80200 manual notes that the line-allocate operation used to
  do global D$ clean does not actually perform a load/fill request
  from external memory, and thus does not actually place valid data
  in the cache lines allocated.  Require that machine-dependent code
  allocate an appropriately-sized chunk of unmapped VA space for the
  global clean operation in order to avoid unpredictable results.
* The i80200 manual notes that the VA range for the Mini-Data global
  clean (which *must* be mapped to physical memory) must be reserved
  exclusively for cleaning the Mini-Data cache.  Require that machine-
  dependent code allocate an appropriately-sized chunk of memory for
  this purpose.


To generate a diff of this commit:
cvs rdiff -r1.2 -r1.3 syssrc/sys/arch/arm/arm/cpufunc_asm_xscale.S

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