From 32f11829266f2ede9afac051f980d4ae9b52f963 Mon Sep 17 00:00:00 2001 From: Tuomas Tynkkynen Date: Tue, 19 Sep 2017 23:18:07 +0300 Subject: ARM: Add a new arch + board for QEMU's 'virt' machine This board builds an U-Boot binary that is bootable with QEMU's 'virt' machine on ARM. The minimal QEMU command line is: qemu-system-arm -machine virt,highmem=off -bios u-boot.bin (Note that the 'highmem=off' parameter to the 'virt' machine is required for PCI to work in U-Boot.) This command line enables the following: - u-boot.bin loaded and executing in the emulated flash at address 0x0 - A generated device tree blob placed at the start of RAM - A freely configurable amount of RAM, described by the DTB - A PL011 serial port, discoverable via the DTB - An ARMv7 architected timer - PSCI for rebooting the system - A generic ECAM-based PCI host controller, discoverable via the DTB Additionally, QEMU allows plugging a bunch of useful peripherals to the PCI bus. The following ones are supported by both U-Boot and Linux: - To add a Serial ATA disk via an Intel ICH9 AHCI controller, pass e.g.: -drive if=none,file=disk.img,id=mydisk -device ich9-ahci,id=ahci -device ide-drive,drive=mydisk,bus=ahci.0 - To add an Intel E1000 network adapter, pass e.g.: -net nic,model=e1000 -net user - To add an EHCI-compliant USB host controller, pass e.g.: -device usb-ehci,id=ehci - To add a NVMe disk, pass e.g.: -drive if=none,file=disk.img,id=mydisk -device nvme,drive=mydisk,serial=foo Signed-off-by: Tuomas Tynkkynen --- board/emulation/qemu-arm/MAINTAINERS | 6 ++++++ board/emulation/qemu-arm/Makefile | 5 +++++ board/emulation/qemu-arm/qemu-arm.c | 33 +++++++++++++++++++++++++++++++++ 3 files changed, 44 insertions(+) create mode 100644 board/emulation/qemu-arm/MAINTAINERS create mode 100644 board/emulation/qemu-arm/Makefile create mode 100644 board/emulation/qemu-arm/qemu-arm.c (limited to 'board/emulation') diff --git a/board/emulation/qemu-arm/MAINTAINERS b/board/emulation/qemu-arm/MAINTAINERS new file mode 100644 index 00000000000..a803061ff4c --- /dev/null +++ b/board/emulation/qemu-arm/MAINTAINERS @@ -0,0 +1,6 @@ +QEMU ARM 'VIRT' BOARD +M: Tuomas Tynkkynen +S: Maintained +F: board/emulation/qemu-arm/ +F: include/configs/qemu-arm.h +F: configs/qemu_arm_defconfig diff --git a/board/emulation/qemu-arm/Makefile b/board/emulation/qemu-arm/Makefile new file mode 100644 index 00000000000..716a6e9c289 --- /dev/null +++ b/board/emulation/qemu-arm/Makefile @@ -0,0 +1,5 @@ +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += qemu-arm.o diff --git a/board/emulation/qemu-arm/qemu-arm.c b/board/emulation/qemu-arm/qemu-arm.c new file mode 100644 index 00000000000..e29ba4630fc --- /dev/null +++ b/board/emulation/qemu-arm/qemu-arm.c @@ -0,0 +1,33 @@ +/* + * Copyright (c) 2017 Tuomas Tynkkynen + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include +#include + +int board_init(void) +{ + return 0; +} + +int dram_init(void) +{ + if (fdtdec_setup_memory_size() != 0) + return -EINVAL; + + return 0; +} + +int dram_init_banksize(void) +{ + fdtdec_setup_memory_banksize(); + + return 0; +} + +void *board_fdt_blob_setup(void) +{ + /* QEMU loads a generated DTB for us at the start of RAM. */ + return (void *)CONFIG_SYS_SDRAM_BASE; +} -- cgit v1.2.3