From d22a765755ba318ce162a976f51d44000a201394 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 1 Apr 2016 21:14:15 -0600 Subject: 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 --- board/raspberrypi/rpi/rpi.c | 25 +++++++++++++++++++++++++ board/raspberrypi/rpi_3/MAINTAINERS | 6 ++++++ board/raspberrypi/rpi_3/Makefile | 7 +++++++ 3 files changed, 38 insertions(+) create mode 100644 board/raspberrypi/rpi_3/MAINTAINERS create mode 100644 board/raspberrypi/rpi_3/Makefile (limited to 'board') diff --git a/board/raspberrypi/rpi/rpi.c b/board/raspberrypi/rpi/rpi.c index 20b5cf48f5..c45ddb14aa 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 0000000000..26ecd99e16 --- /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 0000000000..78e287487c --- /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 -- cgit v1.2.1