From d22a765755ba318ce162a976f51d44000a201394 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 1 Apr 2016 21:14:15 -0600 Subject: [PATCH] ARM: add Raspberry Pi 3 64-bit config On all Pis so far, the VC FW provides a short stub to set up the ARM CPU before entering the kernel (a/k/a U-Boot for us). This feature is not currently supported by the VC FW when booting in 64-bit mode. However, this feature will likely appear in the near future, and this U-Boot port assumes that such a feature is in place. Without that feature, or a temporary workaround described below, U-Boot will not boot. Once the VC FW does provide the ARM stub, u-boot.bin built for rpi_3 can be used drectly as kernel7.img, in the same way as any other RPi port. The following config.txt is required: # Fix mini UART input frequency, and setup/enable up the UART. # Without this option, U-Boot will not boot, even if you don't care # about the serial console. This option will always be required for # all RPi3 use-cases, unless the PL011 UART is used, which is not # yet supported by rpi_3* builds of U-Boot. enable_uart=1 # Boot in AArch64 (64-bit) mode. # It is possible that a future VC FW will remove the need for this # option, instead auto-setting 32-/64-bit mode based on the "kernel" # filename present on the SD card. arm_control=0x200 Prior to the VC FW providing the ARM boot stub, you can use the following steps to build an equivalent stub into the U-Boot binary: git clone https://github.com/swarren/rpi-3-aarch64-demo.git \ ../rpi-3-aarch64-demo (cd ../rpi-3-aarch64-demo && ./build.sh) Build U-Boot for rpi_3 in the usual way cat ../rpi-3-aarch64-demo/armstub64.bin u-boot.bin > u-boot.bin.stubbed Use u-boot.bin.stubbed as kernel7.img on the Pi SD card. In this case, the following additional entries are required in config.txt: # Tell the FW to load the kernel image at address 0, the reset vector. kernel_old=1 Signed-off-by: Stephen Warren Reviewed-by: Tom Rini --- arch/arm/mach-bcm283x/Kconfig | 7 +++++++ board/raspberrypi/rpi/rpi.c | 25 +++++++++++++++++++++++++ board/raspberrypi/rpi_3/MAINTAINERS | 6 ++++++ board/raspberrypi/rpi_3/Makefile | 7 +++++++ configs/rpi_3_defconfig | 11 +++++++++++ include/configs/rpi-common.h | 3 +++ include/configs/rpi_3.h | 14 ++++++++++++++ 7 files changed, 73 insertions(+) create mode 100644 board/raspberrypi/rpi_3/MAINTAINERS create mode 100644 board/raspberrypi/rpi_3/Makefile create mode 100644 configs/rpi_3_defconfig create mode 100644 include/configs/rpi_3.h diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig index a4d291d..a1ad1a4 100644 --- a/arch/arm/mach-bcm283x/Kconfig +++ b/arch/arm/mach-bcm283x/Kconfig @@ -70,12 +70,18 @@ config TARGET_RPI_3_32B select BCM2837 select CPU_V7 +config TARGET_RPI_3 + bool "Raspberry Pi 3 64-bit build" + select ARM64 + select BCM2837 + endchoice config SYS_BOARD default "rpi" if TARGET_RPI default "rpi_2" if TARGET_RPI_2 default "rpi_3_32b" if TARGET_RPI_3_32B + default "rpi_3" if TARGET_RPI_3 config SYS_VENDOR default "raspberrypi" @@ -87,5 +93,6 @@ config SYS_CONFIG_NAME default "rpi" if TARGET_RPI default "rpi_2" if TARGET_RPI_2 default "rpi_3_32b" if TARGET_RPI_3_32B + default "rpi_3" if TARGET_RPI_3 endmenu diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index 20b5cf4..c45ddb1 100644 --- a/board/raspberrypi/rpi/rpi.c +++ b/board/raspberrypi/rpi/rpi.c @@ -19,6 +19,9 @@ #include #include #include +#ifdef CONFIG_ARM64 +#include +#endif DECLARE_GLOBAL_DATA_PTR; @@ -228,6 +231,28 @@ static uint32_t rev_scheme; static uint32_t rev_type; static const struct rpi_model *model; +#ifdef CONFIG_ARM64 +static struct mm_region bcm2837_mem_map[] = { + { + .base = 0x00000000UL, + .size = 0x3f000000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | + PTE_BLOCK_INNER_SHARE + }, { + .base = 0x3f000000UL, + .size = 0x01000000UL, + .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | + PTE_BLOCK_NON_SHARE | + PTE_BLOCK_PXN | PTE_BLOCK_UXN + }, { + /* List terminator */ + 0, + } +}; + +struct mm_region *mem_map = bcm2837_mem_map; +#endif + int dram_init(void) { ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1); diff --git a/board/raspberrypi/rpi_3/MAINTAINERS b/board/raspberrypi/rpi_3/MAINTAINERS new file mode 100644 index 0000000..26ecd99 --- /dev/null +++ b/board/raspberrypi/rpi_3/MAINTAINERS @@ -0,0 +1,6 @@ +RPI_3_BOARD +M: Stephen Warren +S: Maintained +F: board/raspberrypi/rpi_3/ +F: include/configs/rpi_3.h +F: configs/rpi_3_defconfig diff --git a/board/raspberrypi/rpi_3/Makefile b/board/raspberrypi/rpi_3/Makefile new file mode 100644 index 0000000..78e2874 --- /dev/null +++ b/board/raspberrypi/rpi_3/Makefile @@ -0,0 +1,7 @@ +# +# (C) Copyright 2012-2016 Stephen Warren +# +# SPDX-License-Identifier: GPL-2.0 +# + +obj-y := ../rpi/rpi.o diff --git a/configs/rpi_3_defconfig b/configs/rpi_3_defconfig new file mode 100644 index 0000000..417836b --- /dev/null +++ b/configs/rpi_3_defconfig @@ -0,0 +1,11 @@ +CONFIG_ARM=y +CONFIG_ARCH_BCM283X=y +CONFIG_TARGET_RPI_3=y +CONFIG_OF_BOARD_SETUP=y +CONFIG_SYS_PROMPT="U-Boot> " +# CONFIG_CMD_IMLS is not set +# CONFIG_CMD_FLASH is not set +# CONFIG_CMD_FPGA is not set +CONFIG_CMD_GPIO=y +CONFIG_PHYS_TO_BUS=y +CONFIG_OF_LIBFDT=y diff --git a/include/configs/rpi-common.h b/include/configs/rpi-common.h index 5904a32..645c361 100644 --- a/include/configs/rpi-common.h +++ b/include/configs/rpi-common.h @@ -13,9 +13,12 @@ /* Architecture, CPU, etc.*/ #define CONFIG_ARCH_CPU_INIT +/* Use SoC timer for AArch32, but architected timer for AArch64 */ +#ifndef CONFIG_ARM64 #define CONFIG_SYS_TIMER_RATE 1000000 #define CONFIG_SYS_TIMER_COUNTER \ (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo) +#endif /* * 2835 is a SKU in a series for which the 2708 is the first or primary SoC, diff --git a/include/configs/rpi_3.h b/include/configs/rpi_3.h new file mode 100644 index 0000000..0dd9e7e --- /dev/null +++ b/include/configs/rpi_3.h @@ -0,0 +1,14 @@ +/* + * (C) Copyright 2012-2016 Stephen Warren + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#ifndef __CONFIG_H +#define __CONFIG_H + +#define CONFIG_SYS_CACHELINE_SIZE 64 + +#include "rpi-common.h" + +#endif -- 2.7.4