129 lines
4.0 KiB
Plaintext
129 lines
4.0 KiB
Plaintext
config BCM2835
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bool "Broadcom BCM2835 SoC support"
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depends on ARCH_BCM283X
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select CPU_ARM1176
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config BCM2836
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bool "Broadcom BCM2836 SoC support"
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depends on ARCH_BCM283X
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select ARMV7_LPAE
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select CPU_V7
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config BCM2837
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bool "Broadcom BCM2837 SoC support"
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depends on ARCH_BCM283X
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config BCM2837_32B
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bool "Broadcom BCM2837 SoC 32-bit support"
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depends on ARCH_BCM283X
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select BCM2837
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select ARMV7_LPAE
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select CPU_V7
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config BCM2837_64B
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bool "Broadcom BCM2837 SoC 64-bit support"
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depends on ARCH_BCM283X
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select BCM2837
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select ARM64
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menu "Broadcom BCM283X family"
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depends on ARCH_BCM283X
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choice
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prompt "Broadcom BCM283X board select"
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optional
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config TARGET_RPI
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bool "Raspberry Pi (all BCM2835 variants)"
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help
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Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as
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the A, A+, B, B+, Compute Module, and Zero. This option cannot
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support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and
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RPi 3 due to different peripheral address maps.
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This option creates a build targetting the ARM1176 ISA.
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select BCM2835
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config TARGET_RPI_2
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bool "Raspberry Pi 2"
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help
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Support for all BCM2836-based Raspberry Pi variants, such as
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the RPi 2 model B.
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This option also supports BCM2837-based variants such as the RPi 3
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Model B, when run in 32-bit mode, provided you have configured the
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VideoCore firmware to select the PL011 UART for the console by:
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a) config.txt should contain dtoverlay=pi3-miniuart-bt.
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b) You should run the following to tell the VC FW to process DT when
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booting, and copy u-boot.bin.img (rather than u-boot.bin) to the SD
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card as the kernel image:
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path/to/kernel/scripts/mkknlimg --dtok u-boot.bin u-boot.bin.img
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This works as of firmware.git commit 046effa13ebc "firmware:
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arm_loader: emmc clock depends on core clock See:
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https://github.com/raspberrypi/firmware/issues/572".
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This option creates a build targetting the ARMv7/AArch32 ISA.
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select BCM2836
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config TARGET_RPI_3_32B
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bool "Raspberry Pi 3 32-bit build"
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help
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Support for all BCM2837-based Raspberry Pi variants, such as
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the RPi 3 model B, in AArch32 (32-bit) mode.
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This option assumes the VideoCore firmware is configured to use the
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mini UART (rather than PL011) for the serial console. This is the
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default on the RPi 3. To enable the UART console, the following non-
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default option must be present in config.txt: enable_uart=1. This is
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required for U-Boot to operate correctly, even if you only care
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about the HDMI/usbkbd console.
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This option creates a build targetting the ARMv7/AArch32 ISA.
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select BCM2837_32B
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config TARGET_RPI_3
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bool "Raspberry Pi 3 64-bit build"
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help
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Support for all BCM2837-based Raspberry Pi variants, such as
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the RPi 3 model B, in AArch64 (64-bit) mode.
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This option assumes the VideoCore firmware is configured to use the
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mini UART (rather than PL011) for the serial console. This is the
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default on the RPi 3. To enable the UART console, the following non-
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default option must be present in config.txt: enable_uart=1. This is
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required for U-Boot to operate correctly, even if you only care
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about the HDMI/usbkbd console.
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At the time of writing, the VC FW requires a non-default option in
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config.txt to request the ARM CPU boot in 64-bit mode:
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arm_control=0x200
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The VC FW typically provides ARM "stub" code to set up the CPU and
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quiesce secondary SMP CPUs. This is not currently true in 64-bit
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mode. In order to boot U-Boot before the VC FW is enhanced, please
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see the commit description for the commit which added RPi3 support
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for a workaround. Since the instructions are temporary, they are not
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duplicated here. The VC FW enhancement is tracked in
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https://github.com/raspberrypi/firmware/issues/579.
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This option creates a build targetting the ARMv8/AArch64 ISA.
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select BCM2837_64B
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endchoice
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config SYS_BOARD
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default "rpi"
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config SYS_VENDOR
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default "raspberrypi"
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config SYS_SOC
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default "bcm283x"
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config SYS_CONFIG_NAME
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default "rpi"
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endmenu
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