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Kconfig: spl: Add SPL support options to Kconfig

Browse Source 
There are a lot of SPL options in U-Boot to enable various features and
drivers. Currently these do not use Kconfig. Add them to Kconfig along
with suitable help, and drop them from the README.

Signed-off-by: Simon Glass <sjg@chromium.org>
master
Simon Glass 8 years ago committed by Tom Rini
parent 76f1f38816
commit 11bde1cd59
3 changed files with 411 additions and 52 deletions
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  1. 49
      README
  2. 411
      common/spl/Kconfig
  3. 3
      net/Kconfig

49
README
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@ -3509,21 +3509,6 @@ FIT uImage format:
CONFIG_SPL_INIT_MINIMAL
Arch init code should be built for a very small image
CONFIG_SPL_LIBCOMMON_SUPPORT
Support for common/libcommon.o in SPL binary
CONFIG_SPL_LIBDISK_SUPPORT
Support for disk/libdisk.o in SPL binary
CONFIG_SPL_I2C_SUPPORT
Support for drivers/i2c/libi2c.o in SPL binary
CONFIG_SPL_GPIO_SUPPORT
Support for drivers/gpio/libgpio.o in SPL binary
CONFIG_SPL_MMC_SUPPORT
Support for drivers/mmc/libmmc.o in SPL binary
CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS,
Address and partition on the MMC to load U-Boot from
@ -3547,12 +3532,6 @@ FIT uImage format:
Partition on the MMC to load U-Boot from when the MMC is being
used in fs mode
CONFIG_SPL_FAT_SUPPORT
Support for fs/fat/libfat.o in SPL binary
CONFIG_SPL_EXT_SUPPORT
Support for EXT filesystem in SPL binary
CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
Filename to read to load U-Boot when reading from filesystem
@ -3591,18 +3570,10 @@ FIT uImage format:
Support for a lightweight UBI (fastmap) scanner and
loader
CONFIG_SPL_MTD_SUPPORT
Support for the MTD subsystem within SPL. Useful for
environment on NAND support within SPL.
CONFIG_SPL_NAND_RAW_ONLY
Support to boot only raw u-boot.bin images. Use this only
if you need to save space.
CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
Set for the SPL on PPC mpc8xxx targets, support for
drivers/ddr/fsl/libddr.o in SPL binary.
CONFIG_SPL_COMMON_INIT_DDR
Set for common ddr init with serial presence detect in
SPL binary.
@ -3638,29 +3609,9 @@ FIT uImage format:
Support for an OMAP3-specific set of functions to return the
ID and MFR of the first attached NAND chip, if present.
CONFIG_SPL_SERIAL_SUPPORT
Support for drivers/serial/libserial.o in SPL binary
CONFIG_SPL_SPI_FLASH_SUPPORT
Support for drivers/mtd/spi/libspi_flash.o in SPL binary
CONFIG_SPL_SPI_SUPPORT
Support for drivers/spi/libspi.o in SPL binary
CONFIG_SPL_RAM_DEVICE
Support for running image already present in ram, in SPL binary
CONFIG_SPL_LIBGENERIC_SUPPORT
Support for lib/libgeneric.o in SPL binary
CONFIG_SPL_ENV_SUPPORT
Support for the environment operating in SPL binary
CONFIG_SPL_NET_SUPPORT
Support for the net/libnet.o in SPL binary.
It conflicts with SPL env from storage medium specified by
CONFIG_ENV_IS_xxx but CONFIG_ENV_IS_NOWHERE
CONFIG_SPL_PAD_TO
Image offset to which the SPL should be padded before appending
the SPL payload. By default, this is defined as

411
common/spl/Kconfig
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@ -1,3 +1,5 @@
menu "SPL / TPL"
config SUPPORT_SPL
bool
@ -65,3 +67,412 @@ config TPL
prompt "Enable TPL"
help
If you want to build TPL as well as the normal image and SPL, say Y.
config SPL_CRC32_SUPPORT
bool "Support CRC32"
depends on SPL_FIT
help
Enable this to support CRC32 in FIT images within SPL. This is a
32-bit checksum value that can be used to verify images. This is
the least secure type of checksum, suitable for detected
accidental image corruption. For secure applications you should
consider SHA1 or SHA256.
config SPL_MD5_SUPPORT
bool "Support MD5"
depends on SPL_FIT
help
Enable this to support MD5 in FIT images within SPL. An MD5
checksum is a 128-bit hash value used to check that the image
contents have not been corrupted. Note that MD5 is not considered
secure as it is possible (with a brute-force attack) to adjust the
image while still retaining the same MD5 hash value. For secure
applications where images may be changed maliciously, you should
consider SHA1 or SHA256.
config SPL_SHA1_SUPPORT
bool "Support SHA1"
depends on SPL_FIT
help
Enable this to support SHA1 in FIT images within SPL. A SHA1
checksum is a 160-bit (20-byte) hash value used to check that the
image contents have not been corrupted or maliciously altered.
While SHA1 is fairly secure it is coming to the end of its life
due to the expanding computing power avaiable to brute-force
attacks. For more security, consider SHA256.
config SPL_SHA256_SUPPORT
bool "Support SHA256"
depends on SPL_FIT
help
Enable this to support SHA256 in FIT images within SPL. A SHA256
checksum is a 256-bit (32-byte) hash value used to check that the
image contents have not been corrupted. SHA256 is recommended for
use in secure applications since (as at 2016) there is no known
feasible attack that could produce a 'collision' with differing
input data. Use this for the highest security. Note that only the
SHA256 variant is supported: SHA512 and others are not currently
supported in U-Boot.
config SPL_CRYPTO_SUPPORT
bool "Support crypto drivers"
depends on SPL
help
Enable crypto drivers in SPL. These drivers can be used to
accelerate secure boot processing in secure applications. Enable
this option to build the drivers in drivers/crypto as part of an
SPL build.
config SPL_HASH_SUPPORT
bool "Support hashing drivers"
depends on SPL
help
Enable hashing drivers in SPL. These drivers can be used to
accelerate secure boot processing in secure applications. Enable
this option to build system-specific drivers for hash acceleration
as part of an SPL build.
config SPL_DMA_SUPPORT
bool "Support DMA drivers"
depends on SPL
help
Enable DMA (direct-memory-access) drivers in SPL. These drivers
can be used to handle memory-to-peripheral data transfer without
the CPU moving the data. Enable this option to build the drivers
in drivers/dma as part of an SPL build.
config SPL_DRIVERS_MISC_SUPPORT
bool "Support misc drivers"
depends on SPL
help
Enable miscellaneous drivers in SPL. These drivers perform various
tasks that don't fall nicely into other categories, Enable this
option to build the drivers in drivers/misc as part of an SPL
build, for those that support building in SPL (not all drivers do).
config SPL_ENV_SUPPORT
bool "Support an environment"
depends on SPL
help
Enable environment support in SPL. The U-Boot environment provides
a number of settings (essentially name/value pairs) which can
control many aspects of U-Boot's operation. Normally this is not
needed in SPL as it has a much simpler task with less
configuration. But some boards use this to support 'Falcon' boot
on EXT2 and FAT, where SPL boots directly into Linux without
starting U-Boot first. Enabling this option will make getenv()
and setenv() available in SPL.
config SPL_ETH_SUPPORT
bool "Support Ethernet"
depends on SPL_ENV_SUPPORT
help
Enable access to the network subsystem and associated Ethernet
drivers in SPL. This permits SPL to load U-Boot over an Ethernet
link rather than from an on-board peripheral. Environment support
is required since the network stack uses a number of environment
variables. See also SPL_NET_SUPPORT.
config SPL_EXT_SUPPORT
bool "Support EXT filesystems"
depends on SPL
help
Enable support for EXT2/3/4 filesystems with SPL. This permits
U-Boot (or Linux in Falcon mode) to be loaded from an EXT
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
config SPL_FAT_SUPPORT
bool "Support FAT filesystems"
depends on SPL
help
Enable support for FAT and VFAT filesystems with SPL. This
permits U-Boot (or Linux in Falcon mode) to be loaded from a FAT
filesystem from within SPL. Support for the underlying block
device (e.g. MMC or USB) must be enabled separately.
config SPL_FPGA_SUPPORT
bool "Support FPGAs"
depends on SPL
help
Enable support for FPGAs in SPL. Field-programmable Gate Arrays
provide software-configurable hardware which is typically used to
implement peripherals (such as UARTs, LCD displays, MMC) or
accelerate custom processing functions, such as image processing
or machine learning. Sometimes it is useful to program the FPGA
as early as possible during boot, and this option can enable that
within SPL.
config SPL_GPIO_SUPPORT
bool "Support GPIO"
depends on SPL
help
Enable support for GPIOs (General-purpose Input/Output) in SPL.
GPIOs allow U-Boot to read the state of an input line (high or
low) and set the state of an output line. This can be used to
drive LEDs, control power to various system parts and read user
input. GPIOs can be useful in SPL to enable a 'sign-of-life' LED,
for example. Enable this option to build the drivers in
drivers/gpio as part of an SPL build.
config SPL_I2C_SUPPORT
bool "Support I2C"
depends on SPL
help
Enable support for the I2C (Inter-Integrated Circuit) bus in SPL.
I2C works with a clock and data line which can be driven by a
one or more masters or slaves. It is a fairly complex bus but is
widely used as it only needs two lines for communication. Speeds of
400kbps are typical but up to 3.4Mbps is supported by some
hardware. I2C can be useful in SPL to configure power management
ICs (PMICs) before raising the CPU clock speed, for example.
Enable this option to build the drivers in drivers/i2c as part of
an SPL build.
config SPL_LIBCOMMON_SUPPORT
bool "Support common libraries"
depends on SPL
help
Enable support for common U-Boot libraries within SPL. These
libraries include common code to deal with U-Boot images,
environment and USB, for example. This option is enabled on many
boards. Enable this option to build the code in common/ as part of
an SPL build.
config SPL_LIBDISK_SUPPORT
bool "Support disk paritions"
depends on SPL
help
Enable support for disk partitions within SPL. 'Disk' is something
of a misnomer as it includes non-spinning media such as flash (as
used in MMC and USB sticks). Partitions provide a way for a disk
to be split up into separate regions, with a partition table placed
at the start or end which describes the location and size of each
'partition'. These partitions are typically uses as individual block
devices, typically with an EXT2 or FAT filesystem in each. This
option enables whatever partition support has been enabled in
U-Boot to also be used in SPL. It brings in the code in disk/.
config SPL_LIBGENERIC_SUPPORT
bool "Support generic libraries"
depends on SPL
help
Enable support for generic U-Boot libraries within SPL. These
libraries include generic code to deal with device tree, hashing,
printf(), compression and the like. This option is enabled on many
boards. Enable this option to build the code in lib/ as part of an
SPL build.
config SPL_MMC_SUPPORT
bool "Support MMC"
depends on SPL
help
Enable support for MMC (Multimedia Card) within SPL. This enables
the MMC protocol implementation and allows any enabled drivers to
be used within SPL. MMC can be used with or without disk partition
support depending on the application (SPL_LIBDISK_SUPPORT). Enable
this option to build the drivers in drivers/mmc as part of an SPL
build.
config SPL_MPC8XXX_INIT_DDR_SUPPORT
bool "Support MPC8XXX DDR init"
depends on SPL
help
Enable support for DDR-SDRAM (double-data-rate synchronous dynamic
random-access memory) on the MPC8XXX family within SPL. This
allows DRAM to be set up before loading U-Boot into that DRAM,
where it can run.
config SPL_MTD_SUPPORT
bool "Support MTD drivers"
depends on SPL
help
Enable support for MTD (Memory Technology Device) within SPL. MTD
provides a block interface over raw NAND and can also be used with
SPI flash. This allows SPL to load U-Boot from supported MTD
devices. See SPL_NAND_SUPPORT and SPL_ONENAND_SUPPORT for how
to enable specific MTD drivers.
config SPL_MUSB_NEW_SUPPORT
bool "Support new Mentor Graphics USB"
depends on SPL
help
Enable support for Mentor Graphics USB in SPL. This is a new
driver used by some boards. Enable this option to build
the drivers in drivers/usb/musb-new as part of an SPL build. The
old drivers are in drivers/usb/musb.
config SPL_NAND_SUPPORT
bool "Support NAND flash"
depends on SPL
help
Enable support for NAND (Negative AND) flash in SPL. NAND flash
can be used to allow SPL to load U-Boot from supported devices.
This enables the drivers in drivers/mtd/nand as part of an SPL
build.
config SPL_NET_SUPPORT
bool "Support networking"
depends on SPL
help
Enable support for network devices (such as Ethernet) in SPL.
This permits SPL to load U-Boot over a network link rather than
from an on-board peripheral. Environment support is required since
the network stack uses a number of environment variables. See also
SPL_ETH_SUPPORT.
if SPL_NET_SUPPORT
config SPL_NET_VCI_STRING
string "BOOTP Vendor Class Identifier string sent by SPL"
help
As defined by RFC 2132 the vendor class identifier field can be
sent by the client to identify the vendor type and configuration
of a client. This is often used in practice to allow for the DHCP
server to specify different files to load depending on if the ROM,
SPL or U-Boot itself makes the request
endif # if SPL_NET_SUPPORT
config SPL_NO_CPU_SUPPORT
bool "Drop CPU code in SPL"
depends on SPL
help
This is specific to the ARM926EJ-S CPU. It disables the standard
start.S start-up code, presumably so that a replacement can be
used on that CPU. You should not enable it unless you know what
you are doing.
config SPL_NOR_SUPPORT
bool "Support NOR flash"
depends on SPL
help
Enable support for loading U-Boot from memory-mapped NOR (Negative
OR) flash in SPL. NOR flash is slow to write but fast to read, and
a memory-mapped device makes it very easy to access. Loading from
NOR is typically achieved with just a memcpy().
config SPL_ONENAND_SUPPORT
bool "Support OneNAND flash"
depends on SPL
help
Enable support for OneNAND (Negative AND) flash in SPL. OneNAND is
a type of NAND flash and therefore can be used to allow SPL to
load U-Boot from supported devices. This enables the drivers in
drivers/mtd/onenand as part of an SPL build.
config SPL_POST_MEM_SUPPORT
bool "Support POST drivers"
depends on SPL
help
Enable support for POST (Power-on Self Test) in SPL. POST is a
procedure that checks that the hardware (CPU or board) appears to
be functionally correctly. It is a sanity check that can be
performed before booting. This enables the drivers in post/drivers
as part of an SPL build.
config SPL_POWER_SUPPORT
bool "Support power drivers"
depends on SPL
help
Enable support for power control in SPL. This includes support
for PMICs (Power-management Integrated Circuits) and some of the
features provided by PMICs. In particular, voltage regulators can
be used to enable/disable power and vary its voltage. That can be
useful in SPL to turn on boot peripherals and adjust CPU voltage
so that the clock speed can be increased. This enables the drivers
in drivers/power, drivers/power/pmic and drivers/power/regulator
as part of an SPL build.
config SPL_SATA_SUPPORT
bool "Support loading from SATA"
depends on SPL
help
Enable support for SATA (Serial AT attachment) in SPL. This allows
use of SATA devices such as hard drives and flash drivers for
loading U-Boot. SATA is used in higher-end embedded systems and
can provide higher performance than MMC , at somewhat higher
expense and power consumption. This enables loading from SATA
using a configured device.
config SPL_SERIAL_SUPPORT
bool "Support serial"
depends on SPL
help
Enable support for serial in SPL. This allows use of a serial UART
for displaying messages while SPL is running. It also brings in
printf() and panic() functions. This should normally be enabled
unless there are space reasons not to. Even then, consider
enabling USE_TINY_PRINTF which is a small printf() version.
config SPL_SPI_FLASH_SUPPORT
bool "Support SPI flash drivers"
depends on SPL
help
Enable support for using SPI flash in SPL, and loading U-Boot from
SPI flash. SPI flash (Serial Peripheral Bus flash) is named after
the SPI bus that is used to connect it to a system. It is a simple
but fast bidirectional 4-wire bus (clock, chip select and two data
lines). This enables the drivers in drivers/mtd/spi as part of an
SPL build. This normally requires SPL_SPI_SUPPORT.
config SPL_SPI_SUPPORT
bool "Support SPI drivers"
depends on SPL
help
Enable support for using SPI in SPL. This is used for connecting
to SPI flash for loading U-Boot. See SPL_SPI_FLASH_SUPPORT for
more details on that. The SPI driver provides the transport for
data between the SPI flash and the CPU. This option can be used to
enable SPI drivers that are needed for other purposes also, such
as a SPI PMIC.
config SPL_USBETH_SUPPORT
bool "Support USB Ethernet drivers"
depends on SPL
help
Enable access to the USB network subsystem and associated
drivers in SPL. This permits SPL to load U-Boot over a
USB-connected Ethernet link (such as a USB Ethernet dongle) rather
than from an onboard peripheral. Environment support is required
since the network stack uses a number of environment variables.
See also SPL_NET_SUPPORT and SPL_ETH_SUPPORT.
config SPL_USB_HOST_SUPPORT
bool "Support USB host drivers"
depends on SPL
help
Enable access to USB (Universal Serial Bus) host devices so that
SPL can load U-Boot from a connected USB peripheral, such as a USB
flash stick. While USB takes a little longer to start up than most
buses, it is very flexible since many different types of storage
device can be attached. This option enables the drivers in
drivers/usb/host as part of an SPL build.
config SPL_USB_SUPPORT
bool "Support loading from USB"
depends on SPL_USB_HOST_SUPPORT
help
Enable support for USB devices in SPL. This allows use of USB
devices such as hard drives and flash drivers for loading U-Boot.
The actual drivers are enabled separately using the normal U-Boot
config options. This enables loading from USB using a configured
device.
config SPL_WATCHDOG_SUPPORT
bool "Support watchdog drivers"
depends on SPL
help
Enable support for watchdog drivers in SPL. A watchdog is
typically a hardware peripheral which can reset the system when it
detects no activity for a while (such as a software crash). This
enables the drivers in drivers/watchdog as part of an SPL build.
config SPL_YMODEM_SUPPORT
bool "Support loading using Ymodem"
depends on SPL
help
While loading from serial is slow it can be a useful backup when
there is no other option. The Ymodem protocol provides a reliable
means of transmitting U-Boot over a serial line for using in SPL,
with a checksum to ensure correctness.
endmenu

3
net/Kconfig
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@ -45,7 +45,4 @@ config BOOTP_VCI_STRING
default "U-Boot.arm" if ARM
default "U-Boot"
config SPL_NET_VCI_STRING
string
endif # if NET

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