diff options
| author |   Matteo Croce <mcroce@microsoft.com> | 2022-03-30 20:07:14 +0800 |
|---|---|---|
| committer |   Guo Ren <guoren@linux.alibaba.com> | 2022-04-18 21:23:55 +0800 |
| commit | e4df2d5e852a7d24df3672ae9951eb79e179be08 (patch) | |
| tree | 304debe8a13e6d07a56b7f97ac9eb92d8ddd95d7 /arch/csky/Kconfig | |
| parent | csky: Fix versioncheck warnings (diff) | |
| download | linux-dev-e4df2d5e852a7d24df3672ae9951eb79e179be08.tar.xz linux-dev-e4df2d5e852a7d24df3672ae9951eb79e179be08.zip | |
csky: Add C based string functions
Try to access RAM with the largest bit width possible, but without
doing unaligned accesses.
A further improvement could be to use multiple read and writes as the
assembly version was trying to do.
Tested on a BeagleV Starlight with a SiFive U74 core, where the
improvement is noticeable.
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Co-developed-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Diffstat (limited to 'arch/csky/Kconfig')
| -rw-r--r-- | arch/csky/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 75ef86605d69..21d72b078eef 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -320,6 +320,14 @@ config HOTPLUG_CPU controlled through /sys/devices/system/cpu/cpu1/hotplug/target. Say N if you want to disable CPU hotplug. + +config HAVE_EFFICIENT_UNALIGNED_STRING_OPS + bool "Enable EFFICIENT_UNALIGNED_STRING_OPS for abiv2" + depends on CPU_CK807 || CPU_CK810 || CPU_CK860 + help + Say Y here to enable EFFICIENT_UNALIGNED_STRING_OPS. Some CPU models could + deal with unaligned access by hardware. + endmenu source "arch/csky/Kconfig.platforms" |