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malta: update MIPS64 ISA to R2

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Usage of current R1 ISA is inconsistent with the MIPS32 subtarget, little
used and has limited utility for testing.

Many distros target a minimum R2 ISA. Debian MIPS 32-bit/64-bit ports all
use MIPS R2 ISA since Stretch, for example. Fedora's MIPS arch also targets
the R2 ISA for 32-bit/64-bit.

Widely used MIPS64 platforms like Octeon are based on the MIPS R2 ISA or
later, and benefit from having a compatible test platform in OpenWRT.

While Linux does support MIPS64 R1 targets, its usefulness for development
and testing is limited. As an example, the modern Linux eBPF JIT requires
a MIPS R2 ISA or later.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
This commit is contained in:
Tony Ambardar
2020-08-13 22:11:22 -07:00
parent 7dc78d1d28
commit 93608697f3
5 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/target.mk
View File

@@ -198,6 +198,7 @@ ifeq ($(DUMP),1)
CPU_CFLAGS += -mno-branch-likely
CPU_CFLAGS_mips32 = -mips32 -mtune=mips32
CPU_CFLAGS_mips64 = -mips64 -mtune=mips64 -mabi=64
CPU_CFLAGS_mips64r2 = -mips64r2 -mtune=mips64r2 -mabi=64
CPU_CFLAGS_24kc = -mips32r2 -mtune=24kc
CPU_CFLAGS_74kc = -mips32r2 -mtune=74kc
CPU_CFLAGS_octeonplus = -march=octeon+ -mabi=64

2
target/linux/malta/be64/config-default
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@@ -8,7 +8,7 @@ CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_CPU_BIG_ENDIAN=y
# CONFIG_CPU_LITTLE_ENDIAN is not set
CONFIG_CPU_MIPS64=y
CONFIG_CPU_MIPS64_R1=y
CONFIG_CPU_MIPS64_R2=y
CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HUGEPAGES=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y

2
target/linux/malta/be64/target.mk
View File

@@ -1,5 +1,5 @@
ARCH:=mips64
CPU_TYPE:=mips64
CPU_TYPE:=mips64r2
SUBTARGET:=be64
FEATURES+=source-only
BOARDNAME:=Big Endian (64-bits)

2
target/linux/malta/le64/config-default
View File

@@ -7,7 +7,7 @@ CONFIG_ARCH_MMAP_RND_BITS_MIN=12
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_CPU_LITTLE_ENDIAN=y
CONFIG_CPU_MIPS64=y
CONFIG_CPU_MIPS64_R1=y
CONFIG_CPU_MIPS64_R2=y
CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HUGEPAGES=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y

2
target/linux/malta/le64/target.mk
View File

@@ -1,5 +1,5 @@
ARCH:=mips64el
CPU_TYPE:=mips64
CPU_TYPE:=mips64r2
SUBTARGET:=le64
FEATURES+=source-only
BOARDNAME:=Little Endian (64-bits)