CVS commit: src/sys/arch/arm

["Nick Hudson" <skrll%netbsd.org@localhost>]

Module Name:    src
Committed By:   skrll
Date:           Wed Feb  5 07:37:36 UTC 2020

Modified Files:
        src/sys/arch/arm/arm: cpufunc.c
        src/sys/arch/arm/arm32: armv7_generic_space.c pmap.c
        src/sys/arch/arm/conf: Makefile.arm
        src/sys/arch/arm/include/arm32: pmap.h

Log Message:
Fix the armv[67] memory attributes for uncached memory.  Previously it was
mapped as strongly-ordered which meant that unaligned accesses would fault.

armv7_generic_bs_map now maps pages with PMAP_DEV which is treated as SO

bus_dma continues to use PMAP_NOCACHE as appropriate, but this now get
mapped to the correct memory attribute bits for armv[67]

DEVMAP_ENTRY usees a new flag PTE_DEV.

The workaround for the unaligned access faults is now removed.

XXX Other armv[67] boards bus_space implementations should be checked.
XXX There is scope to reduce the difference to aarch64


To generate a diff of this commit:
cvs rdiff -u -r1.175 -r1.176 src/sys/arch/arm/arm/cpufunc.c
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/arm/arm32/armv7_generic_space.c
cvs rdiff -u -r1.387 -r1.388 src/sys/arch/arm/arm32/pmap.c
cvs rdiff -u -r1.53 -r1.54 src/sys/arch/arm/conf/Makefile.arm
cvs rdiff -u -r1.160 -r1.161 src/sys/arch/arm/include/arm32/pmap.h

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