CVS commit: src/sys/arch/powerpc

["Radoslaw Kujawa" <rkujawa%netbsd.org@localhost>]

Module Name:    src
Committed By:   rkujawa
Date:           Mon Jun 15 19:21:15 UTC 2026

Modified Files:
        src/sys/arch/powerpc/ibm4xx/dev: dwcsata.c
        src/sys/arch/powerpc/include/ibm4xx: dcr4xx.h

Log Message:
Dubious workaround for SATA DMA vs. USB issues on 460EX.

When USB host schedules start running at attach, controller
bus masters these schedules on the same AHB bridge where SATA
is. Then when SATA transfer occurs, it starves the DMAC's
FIFO drain - workaround pauses USB schedules during SATA DMA.
This improves the situation, but it's not bulletproof.


To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/powerpc/ibm4xx/dev/dwcsata.c
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/powerpc/include/ibm4xx/dcr4xx.h

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