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authorJustin Hibbits <jhibbits@FreeBSD.org>2016-10-22 01:57:15 +0000
committerJustin Hibbits <jhibbits@FreeBSD.org>2016-10-22 01:57:15 +0000
commitdc9b124d6668d984b8a012e21fef6a0fe585faef (patch)
tree245d7d21aaf2f46e606e5df0a9c2151cc70a670f /Makefile
parentaaa4ddd9d084859c0680ed93de6bf44eaf57276e (diff)
downloadsrc-dc9b124d6668d984b8a012e21fef6a0fe585faef.tar.gz
src-dc9b124d6668d984b8a012e21fef6a0fe585faef.zip
Create a new MACHINE_ARCH for Freescale PowerPC e500v2
Summary: The Freescale e500v2 PowerPC core does not use a standard FPU. Instead, it uses a Signal Processing Engine (SPE)--a DSP-style vector processor unit, which doubles as a FPU. The PowerPC SPE ABI is incompatible with the stock powerpc ABI, so a new MACHINE_ARCH was created to deal with this. Additionaly, the SPE opcodes overlap with Altivec, so these are mutually exclusive. Taking advantage of this fact, a new file, powerpc/booke/spe.c, was created with the same function set as in powerpc/powerpc/altivec.c, so it becomes effectively a drop-in replacement. setjmp/longjmp were modified to save the upper 32-bits of the now-64-bit GPRs (upper 32-bits are only accessible by the SPE). Note: This does _not_ support the SPE in the e500v1, as the e500v1 SPE does not support double-precision floating point. Also, without a new MACHINE_ARCH it would be impossible to provide binary packages which utilize the SPE. Additionally, no work has been done to support ports, work is needed for this. This also means no newer gcc can yet be used. However, gcc's powerpc support has been refactored which would make adding a powerpcspe-freebsd target very easy. Test Plan: This was lightly tested on a RouterBoard RB800 and an AmigaOne A1222 (P1022-based) board, compiled against the new ABI. Base system utilities (/bin/sh, /bin/ls, etc) still function appropriately, the system is able to boot multiuser. Reviewed By: bdrewery, imp Relnotes: yes Differential Revision: https://reviews.freebsd.org/D5683
Notes
Notes: svn path=/head/; revision=307761
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile4
1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 00dbc23bb79c..b5d51341135e 100644
--- a/Makefile
+++ b/Makefile
@@ -239,7 +239,7 @@ _MAKE+= MK_META_MODE=no
_TARGET_ARCH= ${TARGET:S/pc98/i386/:S/arm64/aarch64/}
.elif !defined(TARGET) && defined(TARGET_ARCH) && \
${TARGET_ARCH} != ${MACHINE_ARCH}
-_TARGET= ${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/aarch64/arm64/:C/powerpc64/powerpc/:C/riscv64/riscv/}
+_TARGET= ${TARGET_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb)?/arm/:C/aarch64/arm64/:C/powerpc64/powerpc/:C/powerpcspe/powerpc/:C/riscv64/riscv/}
.endif
.if defined(TARGET) && !defined(_TARGET)
_TARGET=${TARGET}
@@ -422,7 +422,7 @@ _UNIVERSE_TARGETS= ${TARGETS}
TARGET_ARCHES_arm?= arm armeb armv6
TARGET_ARCHES_arm64?= aarch64
TARGET_ARCHES_mips?= mipsel mips mips64el mips64 mipsn32
-TARGET_ARCHES_powerpc?= powerpc powerpc64
+TARGET_ARCHES_powerpc?= powerpc powerpc64 powerpcspe
TARGET_ARCHES_pc98?= i386
.for target in ${TARGETS}
TARGET_ARCHES_${target}?= ${target}