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u-boot/arch/arc/config.mk

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arc: add cpu files 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 08:56:14 +00:00
#
# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0+
#
arc: add selection of endianess in Kconfig This change allows to keep board description clean and minimalistic. This is especially helpful if one board may house different CPUs with different features. It is applicable to both FPGA-based boards or those that have CPUs mounted on interchnagable daughter-boards. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:14 +00:00
ifndef CONFIG_CPU_BIG_ENDIAN
arc: add cpu files 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 08:56:14 +00:00
CONFIG_SYS_LITTLE_ENDIAN = 1
arc: add selection of endianess in Kconfig This change allows to keep board description clean and minimalistic. This is especially helpful if one board may house different CPUs with different features. It is applicable to both FPGA-based boards or those that have CPUs mounted on interchnagable daughter-boards. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:14 +00:00
else
CONFIG_SYS_BIG_ENDIAN = 1
arc: add cpu files 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 08:56:14 +00:00
endif
ifdef CONFIG_SYS_LITTLE_ENDIAN
arc: use more universal prefix for default CROSS_COMPILE As doc/README.ARC says, pre-build ARC toolchains are available at the Synopsys GitHub page. The bin files are prefixed with arc(eb)-buildroot-linux- for earlier releases, but with arc(eb)-snps-linux- for the latest releases. The symbolic links prefixed with arc(eb)-linux- are also available for all the release, so those prefixes can be used as the default CROSS_COMPILE regardless of the toolchains version/variants. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-13 09:49:31 +00:00
ARC_CROSS_COMPILE := arc-linux-
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
PLATFORM_LDFLAGS += -EL
PLATFORM_CPPFLAGS += -mlittle-endian
arc: add cpu files 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 08:56:14 +00:00
endif
ifdef CONFIG_SYS_BIG_ENDIAN
arc: use more universal prefix for default CROSS_COMPILE As doc/README.ARC says, pre-build ARC toolchains are available at the Synopsys GitHub page. The bin files are prefixed with arc(eb)-buildroot-linux- for earlier releases, but with arc(eb)-snps-linux- for the latest releases. The symbolic links prefixed with arc(eb)-linux- are also available for all the release, so those prefixes can be used as the default CROSS_COMPILE regardless of the toolchains version/variants. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-05-13 09:49:31 +00:00
ARC_CROSS_COMPILE := arceb-linux-
arc: add cpu files 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 08:56:14 +00:00
PLATFORM_LDFLAGS += -EB
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
PLATFORM_CPPFLAGS += -mbig-endian
arc: add cpu files 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 08:56:14 +00:00
endif
kbuild: fix CROSS_COMPILE settings in config.mk The syntax CROSS_COMIPLE ?= <cross_compiler_prefix> does not work because config.mk is parsed after exporting CROSS_COMPILE. Like Linux Kernel's arch/$(ARCH)/Makefile, we must write as follows: ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := <cross_compiler_prefix> endif Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-02-28 05:33:30 +00:00
ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := $(ARC_CROSS_COMPILE)
endif
arc: add dependences on MMU presence Depending on MMU presence in CPU there're differences in HW behavior. For example address of instruction that caused exception is put in ECR register if MMU exists and in ERET register otherwise. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Igor Guryanov <guryanov@synopsys.com>
2014-12-24 14:00:29 +00:00
ifdef CONFIG_ARC_MMU_VER
CONFIG_MMU = 1
endif
arc: move CPU flags selection to the main "config.mk" As a preparation to ARCv2 port submission we're moving CPU slection flags to a common location. Also it will allow us to have more flexible CPU specification, not only ISA version but CPU family as well checking CONFIG_ARC_CPU_xxx. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:19 +00:00
ifdef CONFIG_CPU_ARC750D
arc: Use -mcpu=XXX instead of obsolete -marcXXX With newer ARC tools old way of CPU specification gets obsolete, so we're switching to newer and more common way of setting "-mcpu". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-09-16 09:12:26 +00:00
PLATFORM_CPPFLAGS += -mcpu=arc700
arc: move CPU flags selection to the main "config.mk" As a preparation to ARCv2 port submission we're moving CPU slection flags to a common location. Also it will allow us to have more flexible CPU specification, not only ISA version but CPU family as well checking CONFIG_ARC_CPU_xxx. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:19 +00:00
endif
arc: add more flavours of ARC700 series CPU Now we may select a particular version of ARC700: * ARC750D or * ARC770D It allows more flexible (or more fine tuned) configuration of U-Boot. Before that change we relied on minimal configuration but now we may use specific features of each CPU. Moreover allows us to escape manual selection of options that exist in both CPUs but may have say different version like MMUv2 in ARC750D vs MMUv3 in ARC770D. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:11 +00:00
ifdef CONFIG_CPU_ARC770D
arc: Use -mcpu=XXX instead of obsolete -marcXXX With newer ARC tools old way of CPU specification gets obsolete, so we're switching to newer and more common way of setting "-mcpu". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-09-16 09:12:26 +00:00
PLATFORM_CPPFLAGS += -mcpu=arc700 -mlock -mswape
arc: add more flavours of ARC700 series CPU Now we may select a particular version of ARC700: * ARC750D or * ARC770D It allows more flexible (or more fine tuned) configuration of U-Boot. Before that change we relied on minimal configuration but now we may use specific features of each CPU. Moreover allows us to escape manual selection of options that exist in both CPUs but may have say different version like MMUv2 in ARC750D vs MMUv3 in ARC770D. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-02-03 10:58:11 +00:00
endif
arc: introduce U-Boot port for ARCv2 ISA ARC HS and ARC EM are new cores based on ARCv2 ISA which is binary incompatible with ISAv1 (AKA ARCompact). Significant difference between ISAv2 and v1 is implementation of interrupt vector table. In v1 it is implemented in the same way as on many other architectures - as a special location where user may put whether code executed in place (if machine word of space is enough) or jump to a full-scale interrupt handler. In v2 interrupt table is just an array of adresses of real interrupt handlers. That requires a separate section for IVT that is not encoded as code by assembler. This change adds support for following cores: * ARC EM6 (simple 32-bit microcontroller without MMU) * ARC HS36 (advanced 32-bit microcontroller without MMU) * ARC HS38 (advanced 32-bit microcontroller with MMU) As a part of ARC HS38 new version of MMU (v4) was introduced. Also this change adds AXS131 board which is the same DW ARC SDP base board but with ARC HS38 CPU tile. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-01-13 15:35:46 +00:00
ifdef CONFIG_CPU_ARCEM6
arc: Use -mcpu=XXX instead of obsolete -marcXXX With newer ARC tools old way of CPU specification gets obsolete, so we're switching to newer and more common way of setting "-mcpu". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-09-16 09:12:26 +00:00
PLATFORM_CPPFLAGS += -mcpu=arcem
arc: introduce U-Boot port for ARCv2 ISA ARC HS and ARC EM are new cores based on ARCv2 ISA which is binary incompatible with ISAv1 (AKA ARCompact). Significant difference between ISAv2 and v1 is implementation of interrupt vector table. In v1 it is implemented in the same way as on many other architectures - as a special location where user may put whether code executed in place (if machine word of space is enough) or jump to a full-scale interrupt handler. In v2 interrupt table is just an array of adresses of real interrupt handlers. That requires a separate section for IVT that is not encoded as code by assembler. This change adds support for following cores: * ARC EM6 (simple 32-bit microcontroller without MMU) * ARC HS36 (advanced 32-bit microcontroller without MMU) * ARC HS38 (advanced 32-bit microcontroller with MMU) As a part of ARC HS38 new version of MMU (v4) was introduced. Also this change adds AXS131 board which is the same DW ARC SDP base board but with ARC HS38 CPU tile. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-01-13 15:35:46 +00:00
endif
ifdef CONFIG_CPU_ARCHS34
arc: Use "-mcpu=archs" instead of deprecated "-marchs" for ARC HS Newer ARC toolchains don't support "-marchs" option any longer. Instead "-mcpu=archs" should be used. What's also important older toiolchains that support ARC HS cores will also happily accept "-mcpu=archs" so that's a very safe move. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-06-16 08:55:00 +00:00
PLATFORM_CPPFLAGS += -mcpu=archs
arc: introduce U-Boot port for ARCv2 ISA ARC HS and ARC EM are new cores based on ARCv2 ISA which is binary incompatible with ISAv1 (AKA ARCompact). Significant difference between ISAv2 and v1 is implementation of interrupt vector table. In v1 it is implemented in the same way as on many other architectures - as a special location where user may put whether code executed in place (if machine word of space is enough) or jump to a full-scale interrupt handler. In v2 interrupt table is just an array of adresses of real interrupt handlers. That requires a separate section for IVT that is not encoded as code by assembler. This change adds support for following cores: * ARC EM6 (simple 32-bit microcontroller without MMU) * ARC HS36 (advanced 32-bit microcontroller without MMU) * ARC HS38 (advanced 32-bit microcontroller with MMU) As a part of ARC HS38 new version of MMU (v4) was introduced. Also this change adds AXS131 board which is the same DW ARC SDP base board but with ARC HS38 CPU tile. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-01-13 15:35:46 +00:00
endif
ifdef CONFIG_CPU_ARCHS38
arc: Use "-mcpu=archs" instead of deprecated "-marchs" for ARC HS Newer ARC toolchains don't support "-marchs" option any longer. Instead "-mcpu=archs" should be used. What's also important older toiolchains that support ARC HS cores will also happily accept "-mcpu=archs" so that's a very safe move. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-06-16 08:55:00 +00:00
PLATFORM_CPPFLAGS += -mcpu=archs
arc: introduce U-Boot port for ARCv2 ISA ARC HS and ARC EM are new cores based on ARCv2 ISA which is binary incompatible with ISAv1 (AKA ARCompact). Significant difference between ISAv2 and v1 is implementation of interrupt vector table. In v1 it is implemented in the same way as on many other architectures - as a special location where user may put whether code executed in place (if machine word of space is enough) or jump to a full-scale interrupt handler. In v2 interrupt table is just an array of adresses of real interrupt handlers. That requires a separate section for IVT that is not encoded as code by assembler. This change adds support for following cores: * ARC EM6 (simple 32-bit microcontroller without MMU) * ARC HS36 (advanced 32-bit microcontroller without MMU) * ARC HS38 (advanced 32-bit microcontroller with MMU) As a part of ARC HS38 new version of MMU (v4) was introduced. Also this change adds AXS131 board which is the same DW ARC SDP base board but with ARC HS38 CPU tile. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-01-13 15:35:46 +00:00
endif
arc: Fix final linkage with Elf32 tools ARC Elf32 tools by default enable usage of so-called "small data" section or in ARC PRM parlance "GP-relative addressing". The idea is to put up to 2kB of frequently used data into a separate location and use indirect addressing via dedicated core register (GP). Where GP is used as a base for offset calculation. And so if "-msdata" toggle is passed to the compiler either explicitly or implicitly (that's Elf32 tools case) it will try to put some data in that "small data" area and then to calculate real offset from GP to be encoded in instructions we need to know the base value which liker gets from __SDATA_BEGIN__ symbol in hte linker script. In U-Boot we don't use that feature and linker script doesn't define __SDATA_BEGIN__ which gives us the following linkage error if we use Elf32 tools: ------------------------->8------------------- LD u-boot .../bin/arc-elf32-ld.bfd: Error: Linker symbol __SDATA_BEGIN__ not found .../bin/arc-elf32-ld.bfd: final link failed: Bad value ------------------------->8------------------- Note if uClibc or glibc tools are used that problem doesn't happen because usage of "small data section" is disabled by default as not very useful for bigger executables. Moreover GP is just another name of r26 so we're loosing 1 core register which is not used by the compiler as a generic register with "-msdata". Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2018-02-15 12:34:58 +00:00
PLATFORM_CPPFLAGS += -ffixed-r25 -D__ARC__ -gdwarf-2 -mno-sdata
arc: Eliminate unused code and data with GCC's garbage collector Finally GCC's garbage collector works on ARC so let's use it. That's what I may see for HSDK: Before: text data bss dec hex filename 290153 10068 222616 522837 7fa55 u-boot After: text data bss dec hex filename 261999 9460 222360 493819 788fb u-boot Overall ~5% of memory footprint saved. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2018-01-24 21:25:12 +00:00
PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
arc: add cpu files 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 08:56:14 +00:00
# Needed for relocation
arc: Eliminate unused code and data with GCC's garbage collector Finally GCC's garbage collector works on ARC so let's use it. That's what I may see for HSDK: Before: text data bss dec hex filename 290153 10068 222616 522837 7fa55 u-boot After: text data bss dec hex filename 261999 9460 222360 493819 788fb u-boot Overall ~5% of memory footprint saved. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2018-01-24 21:25:12 +00:00
LDFLAGS_FINAL += -pie --gc-sections
arc: add cpu files 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 08:56:14 +00:00
# Load address for standalone apps
CONFIG_STANDALONE_LOAD_ADDR ?= 0x82000000
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