u-boot/arch/arc/lib/Makefile

#
# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
#
# SPDX-License-Identifier:	GPL-2.0+
#

extra-y	= start.o
head-y := start.o
obj-y += cache.o
obj-y += cpu.o
obj-y += interrupts.o
obj-y += relocate.o
obj-y += strchr-700.o
obj-y += strcmp.o
obj-y += strcpy-700.o
obj-y += strlen.o
obj-y += memcmp.o
obj-y += memcpy-700.o
obj-y += memset.o
obj-y += reset.o
obj-y += ints_low.o
obj-y += init_helpers.o

obj-$(CONFIG_CMD_BOOTM) += bootm.o

lib-$(CONFIG_USE_PRIVATE_LIBGCC) += _millicodethunk.o libgcc2.o
arc: add library functions These are library functions used by ARC700 architecture. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Francois Bedard <fbedard@synopsys.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Heiko Schocher <hs@denx.de> 2014-02-04 08:56:15 +00:00			`#`
			`# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.`
			`#`
			`# SPDX-License-Identifier: GPL-2.0+`
			`#`

arc: fix separate compilation of start.o While testing "arc: make sure _start is in the beginning of .text section" I haven't done proper clean-up of built binaries and so missed another tiny bit that lead to the following error: --->8--- LD u-boot arc-linux-ld.bfd: cannot find arch/arc/lib/start.o Makefile:1107: recipe for target 'u-boot' failed make: *** [u-boot] Error 1 --->8--- Fix is trivial: put "start.o" in "extra-y". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> 2015-04-10 16:22:40 +00:00			`extra-y = start.o`
arc: make sure _start is in the beginning of .text section This is important to have entry point in the beginning of .text section because it allows simple loading and execution of U-Boot. For example pre-bootloader loads U-Boot in memory starting from offset 0x81000000 and then just jumps to the same address. Otherwise pre-bootloader would need to find-out where entry-point is. In its turn if it deals with binary image of U-Boot there's no way for pre-bootloader to get required value. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> 2015-04-10 15:41:58 +00:00			`head-y := start.o`
arc: move common sources in library "reset.c" and "cpu.c" have no architecture-specific code at all. Others are applicable to either ARC CPU. This change is a preparation to submission of ARCv2 architecture port. Even though ARCv1 and ARCv2 ISAs are not binary compatible most of built-in modules still have the same programming model - AUX registers are mapped in the same addresses and hold the same data (new featues extend existing ones). So only low-level assembly code (start-up, interrupt handlers) is left as CPU(actually ISA)-specific. This significantyl simplifies maintenance of multiple CPUs/ISAs. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Igor Guryanov <guryanov@synopsys.com> 2014-12-27 23:42:12 +00:00			`obj-y += cache.o`
			`obj-y += cpu.o`
			`obj-y += interrupts.o`
arc: add library functions These are library functions used by ARC700 architecture. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Francois Bedard <fbedard@synopsys.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Heiko Schocher <hs@denx.de> 2014-02-04 08:56:15 +00:00			`obj-y += relocate.o`
			`obj-y += strchr-700.o`
			`obj-y += strcmp.o`
			`obj-y += strcpy-700.o`
			`obj-y += strlen.o`
			`obj-y += memcmp.o`
			`obj-y += memcpy-700.o`
			`obj-y += memset.o`
arc: move common sources in library "reset.c" and "cpu.c" have no architecture-specific code at all. Others are applicable to either ARC CPU. This change is a preparation to submission of ARCv2 architecture port. Even though ARCv1 and ARCv2 ISAs are not binary compatible most of built-in modules still have the same programming model - AUX registers are mapped in the same addresses and hold the same data (new featues extend existing ones). So only low-level assembly code (start-up, interrupt handlers) is left as CPU(actually ISA)-specific. This significantyl simplifies maintenance of multiple CPUs/ISAs. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Igor Guryanov <guryanov@synopsys.com> 2014-12-27 23:42:12 +00:00			`obj-y += reset.o`
arc: move low-level interrupt and exception handlers in a separate file This separation makes maintenance of code easier because those low-level interrupt- or exception handling routines are pretty static and usually require not much care while start-up code is a subject of modifications and enhancements. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> 2015-02-24 14:08:44 +00:00			`obj-y += ints_low.o`
arc: clean-up init procedure Intention behind this work was elimination of as much assembly-written code as it is possible. In case of ARC we already have relocation fix-up implemented in C so why don't we use C for U-Boot copying, .bss zeroing etc. It turned out x86 uses pretty similar approach so we re-used parts of code in "board_f.c" initially implemented for x86. Now assembly usage during init is limited to stack- and frame-pointer setup before and after relocation. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Simon Glass <sjg@chromium.org> 2015-02-24 16:40:36 +00:00			`obj-y += init_helpers.o`
arc: move common sources in library "reset.c" and "cpu.c" have no architecture-specific code at all. Others are applicable to either ARC CPU. This change is a preparation to submission of ARCv2 architecture port. Even though ARCv1 and ARCv2 ISAs are not binary compatible most of built-in modules still have the same programming model - AUX registers are mapped in the same addresses and hold the same data (new featues extend existing ones). So only low-level assembly code (start-up, interrupt handlers) is left as CPU(actually ISA)-specific. This significantyl simplifies maintenance of multiple CPUs/ISAs. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Igor Guryanov <guryanov@synopsys.com> 2014-12-27 23:42:12 +00:00
arc: add library functions These are library functions used by ARC700 architecture. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Francois Bedard <fbedard@synopsys.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Heiko Schocher <hs@denx.de> 2014-02-04 08:56:15 +00:00			`obj-$(CONFIG_CMD_BOOTM) += bootm.o`
arc: build libgcc in U-Boot This way we may have very limited set of functions implemented so we save some space. Also it allows us to build U-Boot for any ARC core with the same one toolchain because we don't rely on pre-built libgcc. For example: * we may use little-endian toolchain but build U-Boot for ether endianess * we may use non-multilibbed uClibc toolchain but build U-Boot for whatever ARC CPU flavour that current GCC supports Private libgcc built from generic C implementation contributes only 144 bytes to .text section so we don't see significant degradation of size: --->8--- $ arc-linux-size u-boot.libgcc-prebuilt text data bss dec hex filename 222217 24912 214820 461949 70c7d u-boot.libgcc-prebuilt $ arc-linux-size u-boot.libgcc-private text data bss dec hex filename 222361 24912 214820 462093 70d0d u-boot.libgcc-private --->8--- Also I don't notice visible performance degradation compared to pre-built libgcc (where at least "div" functions are had-written in assembly) on typical operations of downloading 10Mb uImage over TFTP and bootm. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> 2015-02-03 10:58:20 +00:00
			`lib-$(CONFIG_USE_PRIVATE_LIBGCC) += _millicodethunk.o libgcc2.o`