640 lines
21 KiB
Plaintext
640 lines
21 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file Documentation/kbuild/kconfig-language.txt in the
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# Linux kernel source tree.
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#
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mainmenu "U-Boot $(UBOOTVERSION) Configuration"
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comment "Compiler: $(CC_VERSION_TEXT)"
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source "scripts/Kconfig.include"
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# Allow defaults in arch-specific code to override any given here
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source "arch/Kconfig"
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menu "General setup"
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config BROKEN
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bool
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help
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This option cannot be enabled. It is used as dependency
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for broken and incomplete features.
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config DEPRECATED
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bool
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help
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This option cannot be enabled. It it used as a dependency for
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code that relies on deprecated features that will be removed and
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the conversion deadline has passed.
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config LOCALVERSION
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string "Local version - append to U-Boot release"
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help
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Append an extra string to the end of your U-Boot version.
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This will show up in your boot log, for example.
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The string you set here will be appended after the contents of
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any files with a filename matching localversion* in your
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object and source tree, in that order. Your total string can
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be a maximum of 64 characters.
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config LOCALVERSION_AUTO
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bool "Automatically append version information to the version string"
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default y
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help
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This will try to automatically determine if the current tree is a
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release tree by looking for Git tags that belong to the current
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top of tree revision.
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A string of the format -gxxxxxxxx will be added to the localversion
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if a Git-based tree is found. The string generated by this will be
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appended after any matching localversion* files, and after the value
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set in CONFIG_LOCALVERSION.
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(The actual string used here is the first eight characters produced
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by running the command:
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$ git rev-parse --verify HEAD
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which is done within the script "scripts/setlocalversion".)
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config CC_IS_GCC
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def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
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config GCC_VERSION
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int
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default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
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default 0
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config CC_IS_CLANG
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def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
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config CLANG_VERSION
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int
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default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
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choice
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prompt "Optimization level"
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default CC_OPTIMIZE_FOR_SIZE
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config CC_OPTIMIZE_FOR_SIZE
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bool "Optimize for size"
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help
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Enabling this option will pass "-Os" to gcc, resulting in a smaller
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U-Boot image.
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This option is enabled by default for U-Boot.
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config CC_OPTIMIZE_FOR_SPEED
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bool "Optimize for speed"
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help
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Enabling this option will pass "-O2" to gcc, resulting in a faster
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U-Boot image.
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config CC_OPTIMIZE_FOR_DEBUG
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bool "Optimize for debugging"
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help
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Enabling this option will pass "-Og" to gcc, enabling optimizations
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which don't interfere with debugging.
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endchoice
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config OPTIMIZE_INLINING
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bool "Allow compiler to uninline functions marked 'inline' in full U-Boot"
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help
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This option determines if U-Boot forces gcc to inline the functions
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developers have marked 'inline'. Doing so takes away freedom from gcc to
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do what it thinks is best, which is desirable in some cases for size
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reasons.
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config SPL_OPTIMIZE_INLINING
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bool "Allow compiler to uninline functions marked 'inline' in SPL"
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depends on SPL
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help
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This option determines if U-Boot forces gcc to inline the functions
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developers have marked 'inline'. Doing so takes away freedom from gcc to
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do what it thinks is best, which is desirable in some cases for size
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reasons.
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config ARCH_SUPPORTS_LTO
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bool
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config LTO
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bool "Enable Link Time Optimizations"
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depends on ARCH_SUPPORTS_LTO
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help
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This option enables Link Time Optimization (LTO), a mechanism which
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allows the compiler to optimize between different compilation units.
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This can optimize away dead code paths, resulting in smaller binary
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size (if CC_OPTIMIZE_FOR_SIZE is enabled).
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This option is not available for every architecture and may
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introduce bugs.
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Currently, when compiling with GCC, due to a weird bug regarding
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jobserver, the final linking will not respect make's --jobs argument.
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Instead all available processors will be used (as reported by the
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nproc command).
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If unsure, say n.
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config TPL_OPTIMIZE_INLINING
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bool "Allow compiler to uninline functions marked 'inline' in TPL"
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depends on TPL
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help
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This option determines if U-Boot forces gcc to inline the functions
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developers have marked 'inline'. Doing so takes away freedom from gcc to
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do what it thinks is best, which is desirable in some cases for size
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reasons.
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config CC_COVERAGE
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bool "Enable code coverage analysis"
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depends on SANDBOX
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help
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Enabling this option will pass "--coverage" to gcc to compile
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and link code instrumented for coverage analysis.
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config ASAN
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bool "Enable AddressSanitizer"
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depends on SANDBOX
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help
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Enables AddressSanitizer to discover out-of-bounds accesses,
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use-after-free, double-free and memory leaks.
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config FUZZ
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bool "Enable fuzzing"
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depends on CC_IS_CLANG
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depends on DM_FUZZING_ENGINE
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select ASAN
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help
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Enables the fuzzing infrastructure to generate fuzzing data and run
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fuzz tests.
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config CC_HAS_ASM_INLINE
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def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
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config XEN
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bool "Select U-Boot be run as a bootloader for XEN Virtual Machine"
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help
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Enabling this option will make U-Boot be run as a bootloader
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for XEN [1] Virtual Machine.
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Xen is a virtual machine monitor (VMM) or a type-1 hypervisor with support
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for para-virtualization. Xen can organize the safe execution of several
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virtual machines on the same physical system with performance close to
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native. It is used as the basis for a number of different commercial and
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open source applications, such as: server virtualization, Infrastructure
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as a Service (IaaS), desktop virtualization, security applications,
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embedded and hardware appliances.
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Xen has a special VM called Domain-0 that runs the Dom0 kernel and allows
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Xen to use the device drivers for the Domain-0 kernel by default.
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[1] - https://xenproject.org/
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config DISTRO_DEFAULTS
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bool "Select defaults suitable for booting general purpose Linux distributions"
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select AUTO_COMPLETE
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select CMDLINE_EDITING
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select CMD_BOOTI if ARM64
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select CMD_BOOTZ if ARM && !ARM64
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select CMD_DHCP if CMD_NET
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select CMD_ENV_EXISTS
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select CMD_EXT2
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select CMD_EXT4
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select CMD_FAT
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select CMD_FS_GENERIC
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select CMD_PART if PARTITIONS
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select CMD_PING if CMD_NET
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select CMD_PXE if NET
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select CMD_SYSBOOT
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select ENV_VARS_UBOOT_CONFIG
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select HUSH_PARSER
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select SUPPORT_RAW_INITRD
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select SYS_LONGHELP
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imply CMD_MII if NET
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imply USB_STORAGE
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imply USE_BOOTCOMMAND
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help
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Select this to enable various options and commands which are suitable
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for building u-boot for booting general purpose Linux distributions.
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config ENV_VARS_UBOOT_CONFIG
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bool "Add arch, board, vendor and soc variables to default environment"
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help
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Define this in order to add variables describing the
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U-Boot build configuration to the default environment.
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These will be named arch, cpu, board, vendor, and soc.
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Enabling this option will cause the following to be defined:
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- CONFIG_SYS_ARCH
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- CONFIG_SYS_CPU
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- CONFIG_SYS_BOARD
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- CONFIG_SYS_VENDOR
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- CONFIG_SYS_SOC
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config NR_DRAM_BANKS
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int "Number of DRAM banks"
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default 1 if ARCH_SUNXI || ARCH_OWL
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default 4
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help
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This defines the number of DRAM banks.
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config SYS_BOOT_GET_CMDLINE
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bool "Enable kernel command line setup"
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help
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Enables allocating and saving kernel cmdline in space between
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"bootm_low" and "bootm_low" + BOOTMAPSZ.
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config SYS_BARGSIZE
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int "Size of kernel command line buffer in bytes"
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depends on SYS_BOOT_GET_CMDLINE
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default 512
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help
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Buffer size for Boot Arguments which are passed to the application
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(usually a Linux kernel) when it is booted
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config SYS_BOOT_GET_KBD
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bool "Enable kernel board information setup"
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help
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Enables allocating and saving a kernel copy of the bd_info in
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space between "bootm_low" and "bootm_low" + BOOTMAPSZ.
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config HAS_CUSTOM_SYS_INIT_SP_ADDR
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bool "Use a custom location for the initial stack pointer address"
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depends on ARC || (ARM && !INIT_SP_RELATIVE) || MIPS || PPC || RISCV
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default y if TFABOOT
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help
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Typically, we use an initial stack pointer address that is calculated
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by taking the statically defined CFG_SYS_INIT_RAM_ADDR, adding the
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statically defined CFG_SYS_INIT_RAM_SIZE and then subtracting the
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build-time constant of GENERATED_GBL_DATA_SIZE. On MIPS a different
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but statica calculation is performed. However, some platforms will
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take a different approach. Say Y here to define the address statically
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instead.
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config CUSTOM_SYS_INIT_SP_ADDR
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hex "Static location for the initial stack pointer"
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depends on HAS_CUSTOM_SYS_INIT_SP_ADDR
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default TEXT_BASE if TFABOOT
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config SYS_MALLOC_F
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bool "Enable malloc() pool before relocation"
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default y if DM
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help
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Before relocation, memory is very limited on many platforms. Still,
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we can provide a small malloc() pool if needed. Driver model in
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particular needs this to operate, so that it can allocate the
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initial serial device and any others that are needed.
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config SYS_MALLOC_F_LEN
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hex "Size of malloc() pool before relocation"
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depends on SYS_MALLOC_F
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default 0x400 if M68K || PPC || ROCKCHIP_PX30 || ROCKCHIP_RK3036 || \
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ROCKCHIP_RK3308 || ROCKCHIP_RV1108
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default 0x600 if ARCH_ZYNQMP_R5 || ARCH_ZYNQMP
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default 0x800 if ARCH_ZYNQ || ROCKCHIP_RK3128 || ROCKCHIP_RK3188 || \
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ROCKCHIP_RK322X || X86
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default 0x1000 if ARCH_MESON || ARCH_BMIPS || ARCH_MTMIPS
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default 0x1800 if ARCH_TEGRA
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default 0x4000 if SANDBOX || RISCV || ARCH_APPLE || ROCKCHIP_RK3368 || \
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ROCKCHIP_RK3399
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default 0x8000 if RCAR_GEN3
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default 0x10000 if ARCH_IMX8 || ARCH_IMX8M
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default 0x2000
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help
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Before relocation, memory is very limited on many platforms. Still,
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we can provide a small malloc() pool if needed. Driver model in
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particular needs this to operate, so that it can allocate the
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initial serial device and any others that are needed.
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config SYS_MALLOC_LEN
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hex "Define memory for Dynamic allocation"
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default 0x4000000 if SANDBOX
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default 0x2000000 if ARCH_ROCKCHIP || ARCH_OMAP2PLUS || ARCH_MESON
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default 0x200000 if ARCH_BMIPS || X86
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default 0x4020000 if SUNXI_MINIMUM_DRAM_MB >= 256
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default 0x220000 if SUNXI_MINIMUM_DRAM_MB >= 64
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default 0x120000 if SUNXI_MINIMUM_DRAM_MB >= 32
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default 0x400000
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help
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This defines memory to be allocated for Dynamic allocation
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TODO: Use for other architectures
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config SPL_SYS_MALLOC_F_LEN
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hex "Size of malloc() pool in SPL"
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depends on SYS_MALLOC_F && SPL
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default 0 if !SPL_FRAMEWORK
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default 0x2800 if RCAR_GEN3
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default 0x2000 if IMX8MQ
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default SYS_MALLOC_F_LEN
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help
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In SPL memory is very limited on many platforms. Still,
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we can provide a small malloc() pool if needed. Driver model in
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particular needs this to operate, so that it can allocate the
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initial serial device and any others that are needed.
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It is possible to enable CFG_SYS_SPL_MALLOC_START to start a new
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malloc() region in SDRAM once it is inited.
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config TPL_SYS_MALLOC_F_LEN
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hex "Size of malloc() pool in TPL"
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depends on SYS_MALLOC_F && TPL
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default SPL_SYS_MALLOC_F_LEN
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help
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In TPL memory is very limited on many platforms. Still,
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we can provide a small malloc() pool if needed. Driver model in
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particular needs this to operate, so that it can allocate the
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initial serial device and any others that are needed.
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config VALGRIND
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bool "Inform valgrind about memory allocations"
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depends on !RISCV
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help
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Valgrind is an instrumentation framework for building dynamic analysis
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tools. In particular, it may be used to detect memory management bugs
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in U-Boot. It relies on knowing when heap blocks are allocated in
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order to give accurate results. This happens automatically for
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standard allocator functions provided by the host OS. However, this
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doesn't automatically happen for U-Boot's malloc implementation.
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Enable this option to annotate U-Boot's malloc implementation so that
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it can be handled accurately by Valgrind. If you aren't planning on
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using valgrind to debug U-Boot, say 'n'.
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config VPL_SYS_MALLOC_F_LEN
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hex "Size of malloc() pool in VPL before relocation"
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depends on SYS_MALLOC_F && VPL
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default SYS_MALLOC_F_LEN
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help
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Before relocation, memory is very limited on many platforms. Still,
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we can provide a small malloc() pool if needed. Driver model in
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particular needs this to operate, so that it can allocate the
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initial serial device and any others that are needed.
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menuconfig EXPERT
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bool "Configure standard U-Boot features (expert users)"
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default y
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help
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This option allows certain base U-Boot options and settings
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to be disabled or tweaked. This is for specialized
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environments which can tolerate a "non-standard" U-Boot.
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Use this only if you really know what you are doing.
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if EXPERT
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config SYS_MALLOC_CLEAR_ON_INIT
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bool "Init with zeros the memory reserved for malloc (slow)"
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default y
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help
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This setting is enabled by default. The reserved malloc
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memory is initialized with zeros, so first malloc calls
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will return the pointer to the zeroed memory. But this
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slows the boot time.
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It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
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value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
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Then the boot time can be significantly reduced.
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Warning:
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When disabling this, please check if malloc calls, maybe
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should be replaced by calloc - if one expects zeroed memory.
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config SYS_MALLOC_DEFAULT_TO_INIT
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bool "Default malloc to init while reserving the memory for it"
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help
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It may happen that one needs to move the dynamic allocation
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from one to another memory range, eg. when moving the malloc
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from the limited static to a potentially large dynamic (DDR)
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memory.
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If so then on top of setting the updated memory aside one
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needs to bring the malloc init.
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If such a scenario is sought choose yes.
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config TOOLS_DEBUG
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bool "Enable debug information for tools"
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help
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Enable generation of debug information for tools such as mkimage.
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This can be used for debugging purposes. With debug information
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it is possible to set breakpoints on particular lines, single-step
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debug through the source code, etc.
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endif # EXPERT
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config PHYS_64BIT
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bool "64bit physical address support"
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help
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Say Y here to support 64bit physical memory address.
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This can be used not only for 64bit SoCs, but also for
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large physical address extension on 32bit SoCs.
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config HAS_ROM
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bool
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select BINMAN
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help
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Enables building of a u-boot.rom target. This collects U-Boot and
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any necessary binary blobs.
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config SPL_IMAGE
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string "SPL image used in the combined SPL+U-Boot image"
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default "spl/boot.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
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default "spl/u-boot-spl.bin"
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depends on SPL
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help
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Select the SPL build target that shall be generated by the SPL
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build process (default spl/u-boot-spl.bin). This image will be
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used to generate a combined image with SPL and main U-Boot
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proper as one single image.
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config REMAKE_ELF
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bool "Recreate an ELF image from raw U-Boot binary"
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help
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Enable this to recreate an ELF image (u-boot.elf) from the raw
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U-Boot binary (u-boot.bin), which may already have been statically
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relocated and may already have a device-tree appended to it.
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config BUILD_TARGET
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string "Build target special images"
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default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_ARRIA10
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default "u-boot-with-spl.sfp" if TARGET_SOCFPGA_GEN5
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default "u-boot-with-spl.kwb" if ARMADA_32BIT && SPL
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default "u-boot-elf.srec" if RCAR_GEN3
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default "u-boot.itb" if !BINMAN && SPL_LOAD_FIT && (ARCH_ROCKCHIP || \
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ARCH_SUNXI || RISCV || ARCH_ZYNQMP)
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default "u-boot.kwb" if (ARCH_KIRKWOOD || ARMADA_32BIT) && !SPL
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default "u-boot-with-spl.bin" if MPC85xx && !E500MC && !E5500 && !E6500 && SPL
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default "u-boot-with-spl.bin" if ARCH_AT91 && SPL_NAND_SUPPORT
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default "u-boot-with-spl.imx" if ARCH_MX6 && SPL
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help
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Some SoCs need special image types (e.g. U-Boot binary
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with a special header) as build targets. By defining
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CONFIG_BUILD_TARGET in the SoC / board header, this
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special image will be automatically built upon calling
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make / buildman.
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config HAS_BOARD_SIZE_LIMIT
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bool "Define a maximum size for the U-Boot image"
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default y if RCAR_GEN3
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help
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In some cases, we need to enforce a hard limit on how big the U-Boot
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image itself can be.
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config BOARD_SIZE_LIMIT
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int "Maximum size of the U-Boot image in bytes"
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default 1048576 if RCAR_GEN3
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depends on HAS_BOARD_SIZE_LIMIT
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help
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Maximum size of the U-Boot image. When defined, the build system
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checks that the actual size does not exceed it. This does not
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include SPL nor TPL, on platforms that use that functionality, they
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have a separate option to restict size.
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config SYS_CUSTOM_LDSCRIPT
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bool "Use a custom location for the U-Boot linker script"
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help
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Normally when linking U-Boot we will look in the board directory,
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the CPU directory and finally the "cpu" directory of the architecture
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for the ile "u-boot.lds" and use that as our linker. However, in
|
|
some cases we need to provide a different linker script. To do so,
|
|
enable this option and then provide the location under
|
|
CONFIG_SYS_LDSCRIPT.
|
|
|
|
config SYS_LDSCRIPT
|
|
depends on SYS_CUSTOM_LDSCRIPT
|
|
string "Custom ldscript location"
|
|
help
|
|
Path within the source tree to the linker script to use for the
|
|
main U-Boot binary.
|
|
|
|
config SYS_LOAD_ADDR
|
|
hex "Address in memory to use by default"
|
|
default 0x01000000 if ARCH_SOCFPGA
|
|
default 0x02000000 if PPC || X86
|
|
default 0x81000000 if MACH_SUNIV
|
|
default 0x22000000 if MACH_SUN9I
|
|
default 0x42000000 if ARCH_SUNXI
|
|
default 0x82000000 if ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_K3
|
|
default 0x82000000 if ARCH_MX6 && (MX6SL || MX6SLL || MX6SX || MX6UL || MX6ULL)
|
|
default 0x12000000 if ARCH_MX6 && !(MX6SL || MX6SLL || MX6SX || MX6UL || MX6ULL)
|
|
default 0x80800000 if ARCH_MX7
|
|
default 0x90000000 if FSL_LSCH2 || FSL_LSCH3
|
|
help
|
|
Address in memory to use as the default safe load address.
|
|
|
|
config ERR_PTR_OFFSET
|
|
hex
|
|
default 0x0
|
|
help
|
|
Some U-Boot pointers have redundant information, so we can use a
|
|
scheme where we can return either an error code or a pointer with the
|
|
same return value. The default implementation just casts the pointer
|
|
to a number, however, this may fail on platforms where the end of the
|
|
address range is used for valid pointers (e.g. 0xffffff00 is a valid
|
|
heap pointer in socfpga SPL).
|
|
For such platforms, this value provides an upper range of those error
|
|
pointer values - up to 'MAX_ERRNO' bytes below this value must be
|
|
unused/invalid addresses.
|
|
|
|
config PLATFORM_ELFENTRY
|
|
string
|
|
default "__start" if MIPS
|
|
default "_start"
|
|
|
|
config STACK_SIZE
|
|
hex "Define max stack size that can be used by U-Boot"
|
|
default 0x4000000 if ARCH_VERSAL_NET || ARCH_VERSAL || ARCH_ZYNQMP
|
|
default 0x200000 if MICROBLAZE
|
|
default 0x1000000
|
|
help
|
|
Define Max stack size that can be used by U-Boot. This value is used
|
|
by the UEFI sub-system. On some boards initrd_high is calculated as
|
|
base stack pointer minus this stack size.
|
|
|
|
config SYS_MEM_TOP_HIDE
|
|
hex "Exclude some memory from U-Boot / OS information"
|
|
default 0x0
|
|
help
|
|
If set, this specified memory area will get subtracted from the top
|
|
(end) of RAM and won't get "touched" at all by U-Boot. By fixing up
|
|
gd->ram_size the OS / next stage should gets passed the now
|
|
"corrected" memory size and won't touch it either.
|
|
WARNING: Please make sure that this value is a multiple of the OS
|
|
page size.
|
|
|
|
config SYS_HAS_SRAM
|
|
bool
|
|
default y if TARGET_PIC32MZDASK
|
|
default y if TARGET_DEVKIT8000
|
|
default y if TARGET_TRICORDER
|
|
help
|
|
Enable this to allow support for the on board SRAM.
|
|
SRAM base address is controlled by CONFIG_SYS_SRAM_BASE.
|
|
SRAM size is controlled by CONFIG_SYS_SRAM_SIZE.
|
|
|
|
config SYS_SRAM_BASE
|
|
hex
|
|
default 0x80000000 if TARGET_PIC32MZDASK
|
|
default 0x40200000 if TARGET_DEVKIT8000
|
|
default 0x40200000 if TARGET_TRICORDER
|
|
default 0x0
|
|
|
|
config SYS_SRAM_SIZE
|
|
hex
|
|
default 0x00080000 if TARGET_PIC32MZDASK
|
|
default 0x10000 if TARGET_DEVKIT8000
|
|
default 0x10000 if TARGET_TRICORDER
|
|
default 0x0
|
|
|
|
config SYS_MONITOR_LEN
|
|
int "Maximum size in bytes reserved for U-Boot in memory"
|
|
default 1048576 if X86
|
|
default 786432 if ARCH_SUNXI
|
|
default 0
|
|
help
|
|
Size of memory reserved for monitor code, used to determine
|
|
_at_compile_time_ (!) if the environment is embedded within the
|
|
U-Boot image, or in a separate flash sector, among other uses where
|
|
we need to set a maximum size of the U-Boot binary itself that will
|
|
be loaded.
|
|
|
|
config MP
|
|
bool "Support for multiprocessor"
|
|
help
|
|
This provides an option to bringup different processors
|
|
in multiprocessor cases.
|
|
|
|
config EXAMPLES
|
|
bool "Compile API examples"
|
|
depends on !SANDBOX
|
|
default y if ARCH_QEMU
|
|
help
|
|
U-Boot provides an API for standalone applications. Examples are
|
|
provided in directory examples/.
|
|
|
|
endmenu # General setup
|
|
|
|
source "api/Kconfig"
|
|
|
|
source "boot/Kconfig"
|
|
|
|
source "common/Kconfig"
|
|
|
|
source "cmd/Kconfig"
|
|
|
|
source "disk/Kconfig"
|
|
|
|
source "dts/Kconfig"
|
|
|
|
source "env/Kconfig"
|
|
|
|
source "net/Kconfig"
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "lib/Kconfig"
|
|
|
|
source "test/Kconfig"
|
|
|
|
source "tools/Kconfig"
|