1 config BCM2835 2 bool "Broadcom BCM2835 SoC support" 3 depends on ARCH_BCM283X 4 select CPU_ARM1176 5 6 config BCM2836 7 bool "Broadcom BCM2836 SoC support" 8 depends on ARCH_BCM283X 9 select ARMV7_LPAE 10 select CPU_V7A 11 12 config BCM2837 13 bool "Broadcom BCM2837 SoC support" 14 depends on ARCH_BCM283X 15 16 config BCM2837_32B 17 bool "Broadcom BCM2837 SoC 32-bit support" 18 depends on ARCH_BCM283X 19 select BCM2837 20 select ARMV7_LPAE 21 select CPU_V7A 22 23 config BCM2837_64B 24 bool "Broadcom BCM2837 SoC 64-bit support" 25 depends on ARCH_BCM283X 26 select BCM2837 27 select ARM64 28 29 menu "Broadcom BCM283X family" 30 depends on ARCH_BCM283X 31 32 choice 33 prompt "Broadcom BCM283X board select" 34 optional 35 36 config TARGET_RPI 37 bool "Raspberry Pi (all BCM2835 variants)" 38 help 39 Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as 40 the A, A+, B, B+, Compute Module, and Zero. This option cannot 41 support BCM2836/BCM2837-based Raspberry Pis such as the RPi 2 and 42 RPi 3 due to different peripheral address maps. 43 44 This option creates a build targetting the ARM1176 ISA. 45 select BCM2835 46 47 config TARGET_RPI_0_W 48 bool "Raspberry Pi Zero W" 49 help 50 Support for all ARM1176-/BCM2835-based Raspberry Pi variants, such as 51 the RPi Zero model W. 52 53 This option assumes the VideoCore firmware is configured to use the 54 mini UART (rather than PL011) for the serial console. This is the 55 default on the RPi Zero W. To enable the UART console, the following 56 non-default option must be present in config.txt: enable_uart=1. 57 This is required for U-Boot to operate correctly, even if you only 58 care about the HDMI/usbkbd console. 59 60 This option creates a build targetting the ARMv7/AArch32 ISA. 61 select BCM2835 62 63 config TARGET_RPI_2 64 bool "Raspberry Pi 2" 65 help 66 Support for all BCM2836-based Raspberry Pi variants, such as 67 the RPi 2 model B. 68 69 This option also supports BCM2837-based variants such as the RPi 3 70 Model B, when run in 32-bit mode, provided you have configured the 71 VideoCore firmware to select the PL011 UART for the console by: 72 a) config.txt should contain dtoverlay=pi3-miniuart-bt. 73 b) You should run the following to tell the VC FW to process DT when 74 booting, and copy u-boot.bin.img (rather than u-boot.bin) to the SD 75 card as the kernel image: 76 77 path/to/kernel/scripts/mkknlimg --dtok u-boot.bin u-boot.bin.img 78 79 This works as of firmware.git commit 046effa13ebc "firmware: 80 arm_loader: emmc clock depends on core clock See: 81 https://github.com/raspberrypi/firmware/issues/572". 82 83 This option creates a build targetting the ARMv7/AArch32 ISA. 84 select BCM2836 85 86 config TARGET_RPI_3_32B 87 bool "Raspberry Pi 3 32-bit build" 88 help 89 Support for all BCM2837-based Raspberry Pi variants, such as 90 the RPi 3 model B, in AArch32 (32-bit) mode. 91 92 This option assumes the VideoCore firmware is configured to use the 93 mini UART (rather than PL011) for the serial console. This is the 94 default on the RPi 3. To enable the UART console, the following non- 95 default option must be present in config.txt: enable_uart=1. This is 96 required for U-Boot to operate correctly, even if you only care 97 about the HDMI/usbkbd console. 98 99 This option creates a build targetting the ARMv7/AArch32 ISA. 100 select BCM2837_32B 101 102 config TARGET_RPI_3 103 bool "Raspberry Pi 3 64-bit build" 104 help 105 Support for all BCM2837-based Raspberry Pi variants, such as 106 the RPi 3 model B, in AArch64 (64-bit) mode. 107 108 This option assumes the VideoCore firmware is configured to use the 109 mini UART (rather than PL011) for the serial console. This is the 110 default on the RPi 3. To enable the UART console, the following non- 111 default option must be present in config.txt: enable_uart=1. This is 112 required for U-Boot to operate correctly, even if you only care 113 about the HDMI/usbkbd console. 114 115 At the time of writing, the VC FW requires a non-default option in 116 config.txt to request the ARM CPU boot in 64-bit mode: 117 arm_control=0x200 118 119 The VC FW typically provides ARM "stub" code to set up the CPU and 120 quiesce secondary SMP CPUs. This is not currently true in 64-bit 121 mode. In order to boot U-Boot before the VC FW is enhanced, please 122 see the commit description for the commit which added RPi3 support 123 for a workaround. Since the instructions are temporary, they are not 124 duplicated here. The VC FW enhancement is tracked in 125 https://github.com/raspberrypi/firmware/issues/579. 126 127 This option creates a build targetting the ARMv8/AArch64 ISA. 128 select BCM2837_64B 129 130 endchoice 131 132 config SYS_BOARD 133 default "rpi" 134 135 config SYS_VENDOR 136 default "raspberrypi" 137 138 config SYS_SOC 139 default "bcm283x" 140 141 config SYS_CONFIG_NAME 142 default "rpi" 143 144 endmenu 145
