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config BCM2835
bool "Broadcom BCM2835 SoC support"
depends on ARCH_BCM283X
select CPU_ARM1176
config BCM2836
bool "Broadcom BCM2836 SoC support"
depends on ARCH_BCM283X
select ARMV7_LPAE
select CPU_V7A
config BCM2837
bool "Broadcom BCM2837 SoC support"
depends on ARCH_BCM283X
config BCM2837_32B
bool "Broadcom BCM2837 SoC 32-bit support"
depends on ARCH_BCM283X
select BCM2837
select ARMV7_LPAE
select CPU_V7A
config BCM2837_64B
bool "Broadcom BCM2837 SoC 64-bit support"
depends on ARCH_BCM283X
select BCM2837
select ARM64
config BCM2711
bool "Broadcom BCM2711 SoC support"
depends on ARCH_BCM283X
config BCM2711_32B
bool "Broadcom BCM2711 SoC 32-bit support"
depends on ARCH_BCM283X
select BCM2711
select ARMV7_LPAE
select CPU_V7A
config BCM2711_64B
bool "Broadcom BCM2711 SoC 64-bit support"
depends on ARCH_BCM283X
select BCM2711
select ARM64
menu "Broadcom BCM283X family"
depends on ARCH_BCM283X
choice
prompt "Broadcom BCM283X board select"
optional
config TARGET_RPI
bool "Raspberry Pi (all BCM2835 variants)"
help
Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as
the A, A+, B, B+, Compute Module, and Zero. This option cannot
support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and
RPi 3 due to different peripheral address maps.
This option creates a build targeting the ARM1176 ISA.
select BCM2835
config TARGET_RPI_0_W
bool "Raspberry Pi Zero W"
help
Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as
the RPi Zero model W.
This option assumes the VideoCore firmware is configured to use the
mini UART (rather than PL011) for the serial console. This is the
default on the RPi Zero W. To enable the UART console, the following
non-default option must be present in config.txt: enable_uart=1.
This is required for U-Boot to operate correctly, even if you only
care about the HDMI/usbkbd console.
This option creates a build targeting the ARMv7/AArch32 ISA.
select BCM2835
config TARGET_RPI_2
bool "Raspberry Pi 2"
help
Support for all BCM2836-based Raspberry Pi variants, such as
the RPi 2 model B.
This option also supports BCM2837-based variants such as the RPi 3
Model B, when run in 32-bit mode, provided you have configured the
VideoCore firmware to select the PL011 UART for the console by:
a) config.txt should contain dtoverlay=pi3-miniuart-bt.
b) You should run the following to tell the VC FW to process DT when
booting, and copy u-boot.bin.img (rather than u-boot.bin) to the SD
card as the kernel image:
path/to/kernel/scripts/mkknlimg --dtok u-boot.bin u-boot.bin.img
This works as of firmware.git commit 046effa13ebc "firmware:
arm_loader: emmc clock depends on core clock See:
https://github.com/raspberrypi/firmware/issues/572".
This option creates a build targeting the ARMv7/AArch32 ISA.
select BCM2836
config TARGET_RPI_3_32B
bool "Raspberry Pi 3 32-bit build"
help
Support for all BCM2837-based Raspberry Pi variants, such as
the RPi 3 model B, in AArch32 (32-bit) mode.
This option assumes the VideoCore firmware is configured to use the
mini UART (rather than PL011) for the serial console. This is the
default on the RPi 3. To enable the UART console, the following non-
default option must be present in config.txt: enable_uart=1. This is
required for U-Boot to operate correctly, even if you only care
about the HDMI/usbkbd console.
This option creates a build targeting the ARMv7/AArch32 ISA.
select BCM2837_32B
config TARGET_RPI_3
bool "Raspberry Pi 3 64-bit build"
help
Support for all BCM2837-based Raspberry Pi variants, such as
the RPi 3 model B, in AArch64 (64-bit) mode.
This option assumes the VideoCore firmware is configured to use the
mini UART (rather than PL011) for the serial console. This is the
default on the RPi 3. To enable the UART console, the following non-
default option must be present in config.txt: enable_uart=1. This is
required for U-Boot to operate correctly, even if you only care
about the HDMI/usbkbd console.
At the time of writing, the VC FW requires a non-default option in
config.txt to request the ARM CPU boot in 64-bit mode:
arm_control=0x200
The VC FW typically provides ARM "stub" code to set up the CPU and
quiesce secondary SMP CPUs. This is not currently true in 64-bit
mode. In order to boot U-Boot before the VC FW is enhanced, please
see the commit description for the commit which added RPi3 support
for a workaround. Since the instructions are temporary, they are not
duplicated here. The VC FW enhancement is tracked in
https://github.com/raspberrypi/firmware/issues/579.
This option creates a build targeting the ARMv8/AArch64 ISA.
select BCM2837_64B
config TARGET_RPI_4_32B
bool "Raspberry Pi 4 32-bit build"
help
Support for all BCM2711-based Raspberry Pi variants, such as
the RPi 4 model B, in AArch32 (32-bit) mode.
This option assumes the VideoCore firmware is configured to use the
mini UART (rather than PL011) for the serial console. This is the
default on the RPi 4. To enable the UART console, the following non-
default option must be present in config.txt: enable_uart=1. This is
required for U-Boot to operate correctly, even if you only care
about the HDMI/usbkbd console.
Due to hardware incompatibilities, this can't be used with
BCM283/5/6/7.
This option creates a build targeting the ARMv7/AArch32 ISA.
select BCM2711_32B
config TARGET_RPI_4
bool "Raspberry Pi 4 64-bit build"
help
Support for all BCM2711-based Raspberry Pi variants, such as
the RPi 4 model B, in AArch64 (64-bit) mode.
This option assumes the VideoCore firmware is configured to use the
mini UART (rather than PL011) for the serial console. This is the
default on the RPi 4. To enable the UART console, the following non-
default option must be present in config.txt: enable_uart=1. This is
required for U-Boot to operate correctly, even if you only care
about the HDMI/usbkbd console.
Due to hardware incompatibilities, this can't be used with
BCM283/5/6/7.
Also, due to a bug in firmware, switching to 64bit mode doesn't
happen automatically based on the kernel's image filename. See
https://github.com/raspberrypi/firmware/issues/1193 for more details.
Until that is resolved, the configuration (config.txt) needs to
explicitly set: arm_64bit=1.
This option creates a build targeting the ARMv8/AArch64 ISA.
select BCM2711_64B
endchoice
config SYS_BOARD
default "rpi"
config SYS_VENDOR
default "raspberrypi"
config SYS_SOC
default "bcm283x"
config SYS_CONFIG_NAME
default "rpi"
config BCM283x_BASE
hex
default "0x20000000" if BCM2835
default "0x3f000000" if BCM2836 || BCM2837
default "0xfe000000" if BCM2711
endmenu
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