CVS commit: src/sys/arch/arm/conf
Module Name:src
Committed By: mrg
Date: Sun Feb 18 10:49:43 UTC 2024
Modified Files:
src/sys/arch/arm/conf: Makefile.arm
Log Message:
if we're building with GCC and MACHINE_CPU is aarch64, error out since
that isn't going to work.
doing this better in config(1) is difficult, but at least we can
detect and give a useful error message for this case instead of just
erroring out with some compiler options aren't supported. if we have
a good solution for config(1) we can remove this hack here..
might want to copy this hack for riscv too.
To generate a diff of this commit:
cvs rdiff -u -r1.57 -r1.58 src/sys/arch/arm/conf/Makefile.arm
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/conf/Makefile.arm
diff -u src/sys/arch/arm/conf/Makefile.arm:1.57 src/sys/arch/arm/conf/Makefile.arm:1.58
--- src/sys/arch/arm/conf/Makefile.arm:1.57 Fri Jul 28 02:41:30 2023
+++ src/sys/arch/arm/conf/Makefile.arm Sun Feb 18 10:49:43 2024
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile.arm,v 1.57 2023/07/28 02:41:30 rin Exp $
+# $NetBSD: Makefile.arm,v 1.58 2024/02/18 10:49:43 mrg Exp $
# Makefile for NetBSD
#
@@ -21,6 +21,11 @@ USETOOLS?= no
NEED_OWN_INSTALL_TARGET?=no
.include
+.if ${MACHINE_CPU} == "aarch64" && ${HAVE_GCC} != "no"
+. info (Building GENERIC instead of GENERIC64?)
+. error Don't build 32-bit kernel with 64-bit toolchain
+.endif
+
##
## (1) port identification
##
CVS commit: src/sys/arch/arm/conf
Module Name:src Committed By: mrg Date: Sun Feb 18 10:49:43 UTC 2024 Modified Files: src/sys/arch/arm/conf: Makefile.arm Log Message: if we're building with GCC and MACHINE_CPU is aarch64, error out since that isn't going to work. doing this better in config(1) is difficult, but at least we can detect and give a useful error message for this case instead of just erroring out with some compiler options aren't supported. if we have a good solution for config(1) we can remove this hack here.. might want to copy this hack for riscv too. To generate a diff of this commit: cvs rdiff -u -r1.57 -r1.58 src/sys/arch/arm/conf/Makefile.arm Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
CVS commit: src/sys/arch/arm/conf
Module Name:src Committed By: rin Date: Mon Aug 26 17:18:42 UTC 2019 Modified Files: src/sys/arch/arm/conf: Makefile.arm Log Message: PR kern/54486 Workaround for alignment faults on ARMv6+, at least occur with axe(4) and athn(4) drivers. For ARMv6+, unaligned access is enabled by default. However, it cannot be used for non-cacheable memory, which is used as DMA buffers. This results in alignment faults above. A real fix is to use cacheable memory as DMA buffers. However, it breaks some drivers, awge(4) and vchiq(4) at least. Until we figure out problems and fix them, we choose a fail-safe workaround here; forbid unaligned memory access for whole kernel. Affects on performance is negligibly small as far as we can see. XXX pullup netbsd-9 To generate a diff of this commit: cvs rdiff -u -r1.49 -r1.50 src/sys/arch/arm/conf/Makefile.arm Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
CVS commit: src/sys/arch/arm/conf
Module Name:src Committed By: rin Date: Mon Aug 26 17:18:42 UTC 2019 Modified Files: src/sys/arch/arm/conf: Makefile.arm Log Message: PR kern/54486 Workaround for alignment faults on ARMv6+, at least occur with axe(4) and athn(4) drivers. For ARMv6+, unaligned access is enabled by default. However, it cannot be used for non-cacheable memory, which is used as DMA buffers. This results in alignment faults above. A real fix is to use cacheable memory as DMA buffers. However, it breaks some drivers, awge(4) and vchiq(4) at least. Until we figure out problems and fix them, we choose a fail-safe workaround here; forbid unaligned memory access for whole kernel. Affects on performance is negligibly small as far as we can see. XXX pullup netbsd-9 To generate a diff of this commit: cvs rdiff -u -r1.49 -r1.50 src/sys/arch/arm/conf/Makefile.arm Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files. Modified files: Index: src/sys/arch/arm/conf/Makefile.arm diff -u src/sys/arch/arm/conf/Makefile.arm:1.49 src/sys/arch/arm/conf/Makefile.arm:1.50 --- src/sys/arch/arm/conf/Makefile.arm:1.49 Sat Sep 22 12:24:01 2018 +++ src/sys/arch/arm/conf/Makefile.arm Mon Aug 26 17:18:42 2019 @@ -1,4 +1,4 @@ -# $NetBSD: Makefile.arm,v 1.49 2018/09/22 12:24:01 rin Exp $ +# $NetBSD: Makefile.arm,v 1.50 2019/08/26 17:18:42 rin Exp $ # Makefile for NetBSD # @@ -53,6 +53,26 @@ CPPFLAGS.cpufunc_asm_armv6.S+= -mcpu=arm CPPFLAGS.cpufunc_asm_arm11.S+= -mcpu=arm1136j-s CPPFLAGS.cpufunc_asm_xscale.S+= -mcpu=xscale +.if !empty(MACHINE_ARCH:Mearmv6*) || !empty(MACHINE_ARCH:Mearmv7*) +# XXX +# +# Workaround for alignment faults on ARMv6+, at least occur with +# axe(4) and athn(4) drivers. +# +# For ARMv6+, unaligned access is enabled by default. However, it +# cannot be used for non-cacheable memory, which is used as DMA +# buffers. This results in alignment faults above. A real fix is +# to use cacheable memory as DMA buffers. However, it breaks some +# drivers, awge(4) and vchiq(4) at least. +# +# Until we figure out problems and fix them, we choose a fail-safe +# workaround here; forbid unaligned memory access for whole kernel. +# Affects on performance is negligibly small as far as we can see. +# +# See PR kern/54486 for more details. +CFLAGS+= -mno-unaligned-access +.endif + ## ## (3) libkern and compat ##
