OpenCloudOS-Kernel/arch/openrisc/lib/Makefile

# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for or32 specific library files..
#

obj-y	:= delay.o string.o memset.o memcpy.o
treewide: Add SPDX license identifier - Makefile/Kconfig Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2019-05-19 20:07:45 +08:00			`# SPDX-License-Identifier: GPL-2.0-only`
OpenRISC: Build infrastructure Signed-off-by: Jonas Bonn <jonas@southpole.se> Reviewed-by: Arnd Bergmann <arnd@arndb.de> 2011-06-05 02:52:05 +08:00			`#`
			`# Makefile for or32 specific library files..`
			`#`

openrisc: Add optimized memcpy routine The generic memcpy routine provided in kernel does only byte copies. Using word copies we can lower boot time and cycles spend in memcpy quite significantly. Booting on my de0 nano I see boot times go from 7.2 to 5.6 seconds. The avg cycles in memcpy during boot go from 6467 to 1887. I tested several algorithms (see code in previous patch mails) The implementations I tested and avg cycles: - Word Copies + Loop Unrolls + Non Aligned 1882 - Word Copies + Loop Unrolls 1887 - Word Copies 2441 - Byte Copies + Loop Unrolls 6467 - Byte Copies 7600 In the end I ended up going with Word Copies + Loop Unrolls as it provides best tradeoff between simplicity and boot speedups. Signed-off-by: Stafford Horne <shorne@gmail.com> 2016-03-21 15:16:46 +08:00			`obj-y := delay.o string.o memset.o memcpy.o`