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![Stephen Warren](/assets/img/avatar_default.png)
Now that rpi_*defconfig and Kconfig (rather than the config header file) provide the identity of the build, we don't need to separate config headers and board directories for each RPi variant. Set CONFIG_SYS_BOARD and CONFIG_SYS_CONFIG_NAME so that we can get rid of the duplication. This requires a tiny number of extra ifdefs in the config header. The only disadvantage of this approach is that the $board/$board_name environment variables aren't as descriptive as they used to be. This isn't really an issue because those only exist to allow scripts to create DTB filenames at runtime. However, the RPi board code already sets $fdtfile to something more accurate based on FW-reported board ID anyway. While at it, unify some Kconfig select options, and add a MAINTAINERS entry for bcm283x too. Partially-suggested-by: Tom Rini <trini@konsulko.com> Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Reviewed-by: Tom Rini <trini@konsulko.com>
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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