mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
a67ef280f4
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>
133 lines
3.0 KiB
Plaintext
133 lines
3.0 KiB
Plaintext
choice
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prompt "Architecture select"
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default SANDBOX
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config ARC
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bool "ARC architecture"
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select HAVE_PRIVATE_LIBGCC
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config ARM
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bool "ARM architecture"
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select HAVE_PRIVATE_LIBGCC
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select SUPPORT_OF_CONTROL
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config AVR32
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bool "AVR32 architecture"
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config BLACKFIN
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bool "Blackfin architecture"
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config M68K
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bool "M68000 architecture"
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config MICROBLAZE
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bool "MicroBlaze architecture"
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select SUPPORT_OF_CONTROL
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config MIPS
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bool "MIPS architecture"
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select HAVE_PRIVATE_LIBGCC
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config NDS32
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bool "NDS32 architecture"
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config NIOS2
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bool "Nios II architecture"
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config OPENRISC
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bool "OpenRISC architecture"
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config PPC
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bool "PowerPC architecture"
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select HAVE_PRIVATE_LIBGCC
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config SANDBOX
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bool "Sandbox"
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select SUPPORT_OF_CONTROL
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config SH
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bool "SuperH architecture"
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select HAVE_PRIVATE_LIBGCC
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config SPARC
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bool "SPARC architecture"
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config X86
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bool "x86 architecture"
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select HAVE_PRIVATE_LIBGCC
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select SUPPORT_OF_CONTROL
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endchoice
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config SYS_ARCH
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string
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help
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This option should contain the architecture name to build the
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appropriate arch/<CONFIG_SYS_ARCH> directory.
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All the architectures should specify this option correctly.
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config SYS_CPU
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string
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help
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This option should contain the CPU name to build the correct
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arch/<CONFIG_SYS_ARCH>/cpu/<CONFIG_SYS_CPU> directory.
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This is optional. For those targets without the CPU directory,
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leave this option empty.
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config SYS_SOC
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string
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help
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This option should contain the SoC name to build the directory
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arch/<CONFIG_SYS_ARCH>/cpu/<CONFIG_SYS_CPU>/<CONFIG_SYS_SOC>.
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This is optional. For those targets without the SoC directory,
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leave this option empty.
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config SYS_VENDOR
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string
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help
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This option should contain the vendor name of the target board.
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If it is set and
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board/<CONFIG_SYS_VENDOR>/common/Makefile exists, the vendor common
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directory is compiled.
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If CONFIG_SYS_BOARD is also set, the sources under
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board/<CONFIG_SYS_VENDOR>/<CONFIG_SYS_BOARD> directory are compiled.
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This is optional. For those targets without the vendor directory,
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leave this option empty.
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config SYS_BOARD
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string
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help
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This option should contain the name of the target board.
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If it is set, either board/<CONFIG_SYS_VENDOR>/<CONFIG_SYS_BOARD>
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or board/<CONFIG_SYS_BOARD> directory is compiled depending on
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whether CONFIG_SYS_VENDOR is set or not.
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This is optional. For those targets without the board directory,
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leave this option empty.
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config SYS_CONFIG_NAME
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string
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help
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This option should contain the base name of board header file.
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The header file include/configs/<CONFIG_SYS_CONFIG_NAME>.h
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should be included from include/config.h.
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source "arch/arc/Kconfig"
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source "arch/arm/Kconfig"
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source "arch/avr32/Kconfig"
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source "arch/blackfin/Kconfig"
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source "arch/m68k/Kconfig"
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source "arch/microblaze/Kconfig"
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source "arch/mips/Kconfig"
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source "arch/nds32/Kconfig"
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source "arch/nios2/Kconfig"
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source "arch/openrisc/Kconfig"
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source "arch/powerpc/Kconfig"
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source "arch/sandbox/Kconfig"
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source "arch/sh/Kconfig"
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source "arch/sparc/Kconfig"
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source "arch/x86/Kconfig"
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