[people/ms/u-boot.git] / Kconfig

#
# For a description of the syntax of this configuration file,
# see the file Documentation/kbuild/kconfig-language.txt in the
# Linux kernel source tree.
#
mainmenu "U-Boot $UBOOTVERSION Configuration"

config UBOOTVERSION
	string
	option env="UBOOTVERSION"

# Allow defaults in arch-specific code to override any given here
source "arch/Kconfig"

menu "General setup"

config LOCALVERSION
	string "Local version - append to U-Boot release"
	help
	  Append an extra string to the end of your U-Boot version.
	  This will show up in your boot log, for example.
	  The string you set here will be appended after the contents of
	  any files with a filename matching localversion* in your
	  object and source tree, in that order.  Your total string can
	  be a maximum of 64 characters.

config LOCALVERSION_AUTO
	bool "Automatically append version information to the version string"
	default y
	help
	  This will try to automatically determine if the current tree is a
	  release tree by looking for Git tags that belong to the current
	  top of tree revision.

	  A string of the format -gxxxxxxxx will be added to the localversion
	  if a Git-based tree is found.  The string generated by this will be
	  appended after any matching localversion* files, and after the value
	  set in CONFIG_LOCALVERSION.

	  (The actual string used here is the first eight characters produced
	  by running the command:

	    $ git rev-parse --verify HEAD

	  which is done within the script "scripts/setlocalversion".)

config CC_OPTIMIZE_FOR_SIZE
	bool "Optimize for size"
	default y
	help
	  Enabling this option will pass "-Os" instead of "-O2" to gcc
	  resulting in a smaller U-Boot image.

	  This option is enabled by default for U-Boot.

config SYS_MALLOC_F
	bool "Enable malloc() pool before relocation"
	default y if DM
	help
	  Before relocation, memory is very limited on many platforms. Still,
	  we can provide a small malloc() pool if needed. Driver model in
	  particular needs this to operate, so that it can allocate the
	  initial serial device and any others that are needed.

config SYS_MALLOC_F_LEN
	hex "Size of malloc() pool before relocation"
	depends on SYS_MALLOC_F
	default 0x400
	help
	  Before relocation, memory is very limited on many platforms. Still,
	  we can provide a small malloc() pool if needed. Driver model in
	  particular needs this to operate, so that it can allocate the
	  initial serial device and any others that are needed.

menuconfig EXPERT
	bool "Configure standard U-Boot features (expert users)"
	default y
	help
	  This option allows certain base U-Boot options and settings
	  to be disabled or tweaked. This is for specialized
	  environments which can tolerate a "non-standard" U-Boot.
	  Use this only if you really know what you are doing.

if EXPERT
	config SYS_MALLOC_CLEAR_ON_INIT
	bool "Init with zeros the memory reserved for malloc (slow)"
	default y
	help
	  This setting is enabled by default. The reserved malloc
	  memory is initialized with zeros, so first malloc calls
	  will return the pointer to the zeroed memory. But this
	  slows the boot time.

	  It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
	  value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
	  Then the boot time can be significantly reduced.
	  Warning:
	  When disabling this, please check if malloc calls, maybe
	  should be replaced by calloc - if one expects zeroed memory.
endif
endmenu		# General setup

menu "Boot images"

config SUPPORT_SPL
	bool

config SUPPORT_TPL
	bool

config SPL
	bool
	depends on SUPPORT_SPL
	prompt "Enable SPL"
	help
	  If you want to build SPL as well as the normal image, say Y.

config SPL_SYS_MALLOC_SIMPLE
	bool
	depends on SPL
	prompt "Only use malloc_simple functions in the SPL"
	help
	  Say Y here to only use the *_simple malloc functions from
	  malloc_simple.c, rather then using the versions from dlmalloc.c;
	  this will make the SPL binary smaller at the cost of more heap
	  usage as the *_simple malloc functions do not re-use free-ed mem.

config SPL_STACK_R
	depends on SPL
	bool "Enable SDRAM location for SPL stack"
	help
	  SPL starts off execution in SRAM and thus typically has only a small
	  stack available. Since SPL sets up DRAM while in its board_init_f()
	  function, it is possible for the stack to move there before
	  board_init_r() is reached. This option enables a special SDRAM
	  location for the SPL stack. U-Boot SPL switches to this after
	  board_init_f() completes, and before board_init_r() starts.

config SPL_STACK_R_ADDR
	depends on SPL_STACK_R
	hex "SDRAM location for SPL stack"
	help
	  Specify the address in SDRAM for the SPL stack. This will be set up
	  before board_init_r() is called.

config SPL_STACK_R_MALLOC_SIMPLE_LEN
	depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
	hex "Size of malloc_simple heap after switching to DRAM SPL stack"
	default 0x100000
	help
	  Specify the amount of the stack to use as memory pool for
	  malloc_simple after switching the stack to DRAM. This may be set
	  to give board_init_r() a larger heap then the initial heap in
	  SRAM which is limited to SYS_MALLOC_F_LEN bytes.

config SPL_SEPARATE_BSS
	depends on SPL
	bool "BSS section is in a different memory region from text"
	help
	  Some platforms need a large BSS region in SPL and can provide this
	  because RAM is already set up. In this case BSS can be moved to RAM.
	  This option should then be enabled so that the correct device tree
	  location is used. Normally we put the device tree at the end of BSS
	  but with this option enabled, it goes at _image_binary_end.

config TPL
	bool
	depends on SPL && SUPPORT_TPL
	prompt "Enable TPL"
	help
	  If you want to build TPL as well as the normal image and SPL, say Y.

config FIT
	bool "Support Flattened Image Tree"
	help
	  This option allows to boot the new uImage structrure,
	  Flattened Image Tree.  FIT is formally a FDT, which can include
	  images of various types (kernel, FDT blob, ramdisk, etc.)
	  in a single blob.  To boot this new uImage structure,
	  pass the address of the blob to the "bootm" command.
	  FIT is very flexible, supporting compression, multiple images,
	  multiple configurations, verification through hashing and also
	  verified boot (secure boot using RSA). This option enables that
	  feature.

config FIT_VERBOSE
	bool "Display verbose messages on FIT boot"
	depends on FIT

config FIT_SIGNATURE
	bool "Enable signature verification of FIT uImages"
	depends on FIT
	depends on DM
	select RSA
	help
	  This option enables signature verification of FIT uImages,
	  using a hash signed and verified using RSA. If
	  CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
	  hashing is available using hardware, then then RSA library will use
	  it. See doc/uImage.FIT/signature.txt for more details.

	  WARNING: When relying on signed FIT images with a required signature
	  check the legacy image format is disabled by default, so that
	  unsigned images cannot be loaded. If a board needs the legacy image
	  format support in this case, enable it using
	  CONFIG_IMAGE_FORMAT_LEGACY.

config FIT_BEST_MATCH
	bool "Select the best match for the kernel device tree"
	depends on FIT
	help
	  When no configuration is explicitly selected, default to the
	  one whose fdt's compatibility field best matches that of
	  U-Boot itself. A match is considered "best" if it matches the
	  most specific compatibility entry of U-Boot's fdt's root node.
	  The order of entries in the configuration's fdt is ignored.

config FIT_VERBOSE
	bool "Show verbose messages when FIT images fails"
	depends on FIT
	help
	  Generally a system will have valid FIT images so debug messages
	  are a waste of code space. If you are debugging your images then
	  you can enable this option to get more verbose information about
	  failures.

config OF_BOARD_SETUP
	bool "Set up board-specific details in device tree before boot"
	depends on OF_LIBFDT
	help
	  This causes U-Boot to call ft_board_setup() before booting into
	  the Operating System. This function can set up various
	  board-specific information in the device tree for use by the OS.
	  The device tree is then passed to the OS.

config OF_SYSTEM_SETUP
	bool "Set up system-specific details in device tree before boot"
	depends on OF_LIBFDT
	help
	  This causes U-Boot to call ft_system_setup() before booting into
	  the Operating System. This function can set up various
	  system-specific information in the device tree for use by the OS.
	  The device tree is then passed to the OS.

config OF_STDOUT_VIA_ALIAS
	bool "Update the device-tree stdout alias from U-Boot"
	depends on OF_LIBFDT
	help
	  This uses U-Boot's serial alias from the aliases node to update
	  the device tree passed to the OS. The "linux,stdout-path" property
	  in the chosen node is set to point to the correct serial node.
	  This option currently references CONFIG_CONS_INDEX, which is
	  incorrect when used with device tree as this option does not
	  exist / should not be used.

config SYS_EXTRA_OPTIONS
	string "Extra Options (DEPRECATED)"
	help
	  The old configuration infrastructure (= mkconfig + boards.cfg)
	  provided the extra options field. If you have something like
	  "HAS_BAR,BAZ=64", the optional options
	    #define CONFIG_HAS
	    #define CONFIG_BAZ	64
	  will be defined in include/config.h.
	  This option was prepared for the smooth migration from the old
	  configuration to Kconfig. Since this option will be removed sometime,
	  new boards should not use this option.

config SYS_TEXT_BASE
	depends on SPARC || ARC || X86 || ARCH_UNIPHIER || ARCH_ZYNQMP || \
		(M68K && !TARGET_ASTRO_MCF5373L) || MICROBLAZE || MIPS
	depends on !EFI_APP
	hex "Text Base"
	help
	  TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture

config SPL_LOAD_FIT
	bool "Enable SPL loading U-Boot as a FIT"
	depends on FIT
	help
	  Normally with the SPL framework a legacy image is generated as part
	  of the build. This contains U-Boot along with information as to
	  where it should be loaded. This option instead enables generation
	  of a FIT (Flat Image Tree) which provides more flexibility. In
	  particular it can handle selecting from multiple device tree
	  and passing the correct one to U-Boot.

config SYS_CLK_FREQ
	depends on ARC || ARCH_SUNXI
	int "CPU clock frequency"
	help
	  TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture

endmenu		# Boot images

source "common/Kconfig"

source "cmd/Kconfig"

source "dts/Kconfig"

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

source "lib/Kconfig"

source "test/Kconfig"
Commit	Line	Data
51631259 MY	1	#
51631259 MY	2	# For a description of the syntax of this configuration file,
59d7c34b RD	3	# see the file Documentation/kbuild/kconfig-language.txt in the
59d7c34b RD	4	# Linux kernel source tree.
51631259 MY	5	#
	6	mainmenu "U-Boot $UBOOTVERSION Configuration"
	7
	8	config UBOOTVERSION
	9	string
	10	option env="UBOOTVERSION"
	11
66afaef2 SG	12	# Allow defaults in arch-specific code to override any given here
	13	source "arch/Kconfig"
	14
51631259 MY	15	menu "General setup"
51631259 MY	16
e91c3c33 MY	17	config LOCALVERSION
e91c3c33 MY	18	string "Local version - append to U-Boot release"
e91c3c33 MY	19	help
e91c3c33 MY	20	Append an extra string to the end of your U-Boot version.
59d7c34b	21	This will show up in your boot log, for example.
e91c3c33 MY	22	The string you set here will be appended after the contents of
	23	any files with a filename matching localversion* in your
	24	object and source tree, in that order. Your total string can
	25	be a maximum of 64 characters.
	26
	27	config LOCALVERSION_AUTO
	28	bool "Automatically append version information to the version string"
e91c3c33 MY	29	default y
	30	help
	31	This will try to automatically determine if the current tree is a
59d7c34b	32	release tree by looking for Git tags that belong to the current
e91c3c33 MY	33	top of tree revision.
	34
	35	A string of the format -gxxxxxxxx will be added to the localversion
59d7c34b	36	if a Git-based tree is found. The string generated by this will be
e91c3c33 MY	37	appended after any matching localversion* files, and after the value
	38	set in CONFIG_LOCALVERSION.
	39
	40	(The actual string used here is the first eight characters produced
	41	by running the command:
	42
	43	$ git rev-parse --verify HEAD
	44
	45	which is done within the script "scripts/setlocalversion".)
	46
4a8ed8e2 MY	47	config CC_OPTIMIZE_FOR_SIZE
4a8ed8e2 MY	48	bool "Optimize for size"
4a8ed8e2 MY	49	default y
	50	help
	51	Enabling this option will pass "-Os" instead of "-O2" to gcc
	52	resulting in a smaller U-Boot image.
	53
	54	This option is enabled by default for U-Boot.
	55
b724bd7d SG	56	config SYS_MALLOC_F
b724bd7d SG	57	bool "Enable malloc() pool before relocation"
326a6823	58	default y if DM
b724bd7d	59	help
59d7c34b	60	Before relocation, memory is very limited on many platforms. Still,
b724bd7d SG	61	we can provide a small malloc() pool if needed. Driver model in
	62	particular needs this to operate, so that it can allocate the
	63	initial serial device and any others that are needed.
	64
	65	config SYS_MALLOC_F_LEN
	66	hex "Size of malloc() pool before relocation"
	67	depends on SYS_MALLOC_F
	68	default 0x400
	69	help
59d7c34b	70	Before relocation, memory is very limited on many platforms. Still,
b724bd7d SG	71	we can provide a small malloc() pool if needed. Driver model in
	72	particular needs this to operate, so that it can allocate the
	73	initial serial device and any others that are needed.
	74
1bf0979f	75	menuconfig EXPERT
0aa8a4ad PM	76	bool "Configure standard U-Boot features (expert users)"
	77	default y
	78	help
	79	This option allows certain base U-Boot options and settings
	80	to be disabled or tweaked. This is for specialized
	81	environments which can tolerate a "non-standard" U-Boot.
59d7c34b	82	Use this only if you really know what you are doing.
0aa8a4ad PM	83
	84	if EXPERT
	85	config SYS_MALLOC_CLEAR_ON_INIT
	86	bool "Init with zeros the memory reserved for malloc (slow)"
	87	default y
	88	help
	89	This setting is enabled by default. The reserved malloc
	90	memory is initialized with zeros, so first malloc calls
	91	will return the pointer to the zeroed memory. But this
	92	slows the boot time.
	93
	94	It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
	95	value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
	96	Then the boot time can be significantly reduced.
	97	Warning:
	98	When disabling this, please check if malloc calls, maybe
59d7c34b	99	should be replaced by calloc - if one expects zeroed memory.
0aa8a4ad	100	endif
40ad4c4b MY	101	endmenu # General setup
40ad4c4b MY	102
e91c3c33 MY	103	menu "Boot images"
e91c3c33 MY	104
02627356 MY	105	config SUPPORT_SPL
	106	bool
	107
cf6bbe4c MY	108	config SUPPORT_TPL
	109	bool
	110
51631259 MY	111	config SPL
51631259 MY	112	bool
02627356	113	depends on SUPPORT_SPL
d648964f	114	prompt "Enable SPL"
51631259 MY	115	help
	116	If you want to build SPL as well as the normal image, say Y.
	117
1eb0c03c HG	118	config SPL_SYS_MALLOC_SIMPLE
	119	bool
	120	depends on SPL
59d7c34b	121	prompt "Only use malloc_simple functions in the SPL"
1eb0c03c HG	122	help
1eb0c03c HG	123	Say Y here to only use the *_simple malloc functions from
59d7c34b	124	malloc_simple.c, rather then using the versions from dlmalloc.c;
1eb0c03c HG	125	this will make the SPL binary smaller at the cost of more heap
	126	usage as the *_simple malloc functions do not re-use free-ed mem.
	127
db910353 SG	128	config SPL_STACK_R
	129	depends on SPL
	130	bool "Enable SDRAM location for SPL stack"
	131	help
	132	SPL starts off execution in SRAM and thus typically has only a small
	133	stack available. Since SPL sets up DRAM while in its board_init_f()
	134	function, it is possible for the stack to move there before
	135	board_init_r() is reached. This option enables a special SDRAM
	136	location for the SPL stack. U-Boot SPL switches to this after
	137	board_init_f() completes, and before board_init_r() starts.
	138
	139	config SPL_STACK_R_ADDR
	140	depends on SPL_STACK_R
	141	hex "SDRAM location for SPL stack"
	142	help
	143	Specify the address in SDRAM for the SPL stack. This will be set up
	144	before board_init_r() is called.
	145
dcfcb8d4 HG	146	config SPL_STACK_R_MALLOC_SIMPLE_LEN
	147	depends on SPL_STACK_R && SPL_SYS_MALLOC_SIMPLE
	148	hex "Size of malloc_simple heap after switching to DRAM SPL stack"
	149	default 0x100000
	150	help
	151	Specify the amount of the stack to use as memory pool for
	152	malloc_simple after switching the stack to DRAM. This may be set
	153	to give board_init_r() a larger heap then the initial heap in
	154	SRAM which is limited to SYS_MALLOC_F_LEN bytes.
	155
10172962 SG	156	config SPL_SEPARATE_BSS
	157	depends on SPL
	158	bool "BSS section is in a different memory region from text"
	159	help
	160	Some platforms need a large BSS region in SPL and can provide this
	161	because RAM is already set up. In this case BSS can be moved to RAM.
	162	This option should then be enabled so that the correct device tree
	163	location is used. Normally we put the device tree at the end of BSS
	164	but with this option enabled, it goes at _image_binary_end.
	165
51631259 MY	166	config TPL
51631259 MY	167	bool
cf6bbe4c	168	depends on SPL && SUPPORT_TPL
d648964f	169	prompt "Enable TPL"
51631259 MY	170	help
	171	If you want to build TPL as well as the normal image and SPL, say Y.
	172
b6cf4439 MY	173	config FIT
b6cf4439 MY	174	bool "Support Flattened Image Tree"
b6cf4439 MY	175	help
	176	This option allows to boot the new uImage structrure,
	177	Flattened Image Tree. FIT is formally a FDT, which can include
	178	images of various types (kernel, FDT blob, ramdisk, etc.)
	179	in a single blob. To boot this new uImage structure,
1f9ac4a4	180	pass the address of the blob to the "bootm" command.
73223f0e SG	181	FIT is very flexible, supporting compression, multiple images,
	182	multiple configurations, verification through hashing and also
	183	verified boot (secure boot using RSA). This option enables that
	184	feature.
b6cf4439 MY	185
	186	config FIT_VERBOSE
	187	bool "Display verbose messages on FIT boot"
	188	depends on FIT
	189
	190	config FIT_SIGNATURE
c4beb22f	191	bool "Enable signature verification of FIT uImages"
b6cf4439	192	depends on FIT
9009798d	193	depends on DM
c4beb22f	194	select RSA
b6cf4439 MY	195	help
b6cf4439 MY	196	This option enables signature verification of FIT uImages,
94e3c8c4	197	using a hash signed and verified using RSA. If
94e3c8c4	198	CONFIG_SHA_PROG_HW_ACCEL is defined, i.e support for progressive
73223f0e SG	199	hashing is available using hardware, then then RSA library will use
	200	it. See doc/uImage.FIT/signature.txt for more details.
	201
	202	WARNING: When relying on signed FIT images with a required signature
	203	check the legacy image format is disabled by default, so that
	204	unsigned images cannot be loaded. If a board needs the legacy image
	205	format support in this case, enable it using
	206	CONFIG_IMAGE_FORMAT_LEGACY.
	207
	208	config FIT_BEST_MATCH
	209	bool "Select the best match for the kernel device tree"
	210	depends on FIT
	211	help
	212	When no configuration is explicitly selected, default to the
	213	one whose fdt's compatibility field best matches that of
	214	U-Boot itself. A match is considered "best" if it matches the
	215	most specific compatibility entry of U-Boot's fdt's root node.
	216	The order of entries in the configuration's fdt is ignored.
	217
	218	config FIT_VERBOSE
	219	bool "Show verbose messages when FIT images fails"
	220	depends on FIT
	221	help
	222	Generally a system will have valid FIT images so debug messages
	223	are a waste of code space. If you are debugging your images then
	224	you can enable this option to get more verbose information about
	225	failures.
	226
	227	config OF_BOARD_SETUP
	228	bool "Set up board-specific details in device tree before boot"
	229	depends on OF_LIBFDT
	230	help
	231	This causes U-Boot to call ft_board_setup() before booting into
	232	the Operating System. This function can set up various
	233	board-specific information in the device tree for use by the OS.
	234	The device tree is then passed to the OS.
	235
	236	config OF_SYSTEM_SETUP
	237	bool "Set up system-specific details in device tree before boot"
	238	depends on OF_LIBFDT
	239	help
	240	This causes U-Boot to call ft_system_setup() before booting into
	241	the Operating System. This function can set up various
	242	system-specific information in the device tree for use by the OS.
	243	The device tree is then passed to the OS.
	244
	245	config OF_STDOUT_VIA_ALIAS
	246	bool "Update the device-tree stdout alias from U-Boot"
	247	depends on OF_LIBFDT
	248	help
	249	This uses U-Boot's serial alias from the aliases node to update
	250	the device tree passed to the OS. The "linux,stdout-path" property
	251	in the chosen node is set to point to the correct serial node.
	252	This option currently references CONFIG_CONS_INDEX, which is
	253	incorrect when used with device tree as this option does not
	254	exist / should not be used.
b6cf4439	255
51631259 MY	256	config SYS_EXTRA_OPTIONS
51631259 MY	257	string "Extra Options (DEPRECATED)"
51631259 MY	258	help
51631259 MY	259	The old configuration infrastructure (= mkconfig + boards.cfg)
ed36323f	260	provided the extra options field. If you have something like
51631259 MY	261	"HAS_BAR,BAZ=64", the optional options
	262	#define CONFIG_HAS
	263	#define CONFIG_BAZ 64
	264	will be defined in include/config.h.
	265	This option was prepared for the smooth migration from the old
	266	configuration to Kconfig. Since this option will be removed sometime,
	267	new boards should not use this option.
	268
7f7563ce	269	config SYS_TEXT_BASE
c6e18144	270	depends on SPARC \|\| ARC \|\| X86 \|\| ARCH_UNIPHIER \|\| ARCH_ZYNQMP \|\| \
ec35e123	271	(M68K && !TARGET_ASTRO_MCF5373L) \|\| MICROBLAZE \|\| MIPS
484cce0d	272	depends on !EFI_APP
7f7563ce MY	273	hex "Text Base"
	274	help
	275	TODO: Move CONFIG_SYS_TEXT_BASE for all the architecture
	276
f1dcee59 SG	277	config SPL_LOAD_FIT
	278	bool "Enable SPL loading U-Boot as a FIT"
	279	depends on FIT
	280	help
	281	Normally with the SPL framework a legacy image is generated as part
	282	of the build. This contains U-Boot along with information as to
	283	where it should be loaded. This option instead enables generation
	284	of a FIT (Flat Image Tree) which provides more flexibility. In
	285	particular it can handle selecting from multiple device tree
	286	and passing the correct one to U-Boot.
	287
33d88183	288	config SYS_CLK_FREQ
e71b422b	289	depends on ARC \|\| ARCH_SUNXI
33d88183 AB	290	int "CPU clock frequency"
	291	help
	292	TODO: Move CONFIG_SYS_CLK_FREQ for all the architecture
	293
e91c3c33	294	endmenu # Boot images
51631259	295
ed36323f MY	296	source "common/Kconfig"
ed36323f MY	297
72a8cf8d SG	298	source "cmd/Kconfig"
72a8cf8d SG	299
783e6a72 MY	300	source "dts/Kconfig"
783e6a72 MY	301
ed36323f MY	302	source "net/Kconfig"
	303
	304	source "drivers/Kconfig"
	305
	306	source "fs/Kconfig"
	307
	308	source "lib/Kconfig"
1967982a SG	309
1967982a SG	310	source "test/Kconfig"