1config BCM2835 2 bool "Broadcom BCM2835 SoC support" 3 depends on ARCH_BCM283X 4 select CPU_ARM1176 5 6config BCM2836 7 bool "Broadcom BCM2836 SoC support" 8 depends on ARCH_BCM283X 9 select ARMV7_LPAE 10 select CPU_V7 11 12config BCM2837 13 bool "Broadcom BCM2837 SoC support" 14 depends on ARCH_BCM283X 15 16config 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_V7 22 23config BCM2837_64B 24 bool "Broadcom BCM2837 SoC 64-bit support" 25 depends on ARCH_BCM283X 26 select BCM2837 27 select ARM64 28 29menu "Broadcom BCM283X family" 30 depends on ARCH_BCM283X 31 32choice 33 prompt "Broadcom BCM283X board select" 34 optional 35 36config 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 47config TARGET_RPI_2 48 bool "Raspberry Pi 2" 49 help 50 Support for all BCM2836-based Raspberry Pi variants, such as 51 the RPi 2 model B. 52 53 This option also supports BCM2837-based variants such as the RPi 3 54 Model B, when run in 32-bit mode, provided you have configured the 55 VideoCore firmware to select the PL011 UART for the console by: 56 a) config.txt should contain dtoverlay=pi3-miniuart-bt. 57 b) You should run the following to tell the VC FW to process DT when 58 booting, and copy u-boot.bin.img (rather than u-boot.bin) to the SD 59 card as the kernel image: 60 61 path/to/kernel/scripts/mkknlimg --dtok u-boot.bin u-boot.bin.img 62 63 This works as of firmware.git commit 046effa13ebc "firmware: 64 arm_loader: emmc clock depends on core clock See: 65 https://github.com/raspberrypi/firmware/issues/572". 66 67 This option creates a build targetting the ARMv7/AArch32 ISA. 68 select BCM2836 69 70config TARGET_RPI_3_32B 71 bool "Raspberry Pi 3 32-bit build" 72 help 73 Support for all BCM2837-based Raspberry Pi variants, such as 74 the RPi 3 model B, in AArch32 (32-bit) mode. 75 76 This option assumes the VideoCore firmware is configured to use the 77 mini UART (rather than PL011) for the serial console. This is the 78 default on the RPi 3. To enable the UART console, the following non- 79 default option must be present in config.txt: enable_uart=1. This is 80 required for U-Boot to operate correctly, even if you only care 81 about the HDMI/usbkbd console. 82 83 This option creates a build targetting the ARMv7/AArch32 ISA. 84 select BCM2837_32B 85 86config TARGET_RPI_3 87 bool "Raspberry Pi 3 64-bit build" 88 help 89 Support for all BCM2837-based Raspberry Pi variants, such as 90 the RPi 3 model B, in AArch64 (64-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 At the time of writing, the VC FW requires a non-default option in 100 config.txt to request the ARM CPU boot in 64-bit mode: 101 arm_control=0x200 102 103 The VC FW typically provides ARM "stub" code to set up the CPU and 104 quiesce secondary SMP CPUs. This is not currently true in 64-bit 105 mode. In order to boot U-Boot before the VC FW is enhanced, please 106 see the commit description for the commit which added RPi3 support 107 for a workaround. Since the instructions are temporary, they are not 108 duplicated here. The VC FW enhancement is tracked in 109 https://github.com/raspberrypi/firmware/issues/579. 110 111 This option creates a build targetting the ARMv8/AArch64 ISA. 112 select BCM2837_64B 113 114endchoice 115 116config SYS_BOARD 117 default "rpi" 118 119config SYS_VENDOR 120 default "raspberrypi" 121 122config SYS_SOC 123 default "bcm283x" 124 125config SYS_CONFIG_NAME 126 default "rpi" 127 128endmenu 129