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 <tuomas.tynkkynen@iki.fi>master
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if ARCH_QEMU |
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config SYS_VENDOR |
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default "emulation" |
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config SYS_BOARD |
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default "qemu-arm" |
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config SYS_CONFIG_NAME |
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default "qemu-arm" |
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endif |
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QEMU ARM 'VIRT' BOARD |
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M: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> |
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S: Maintained |
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F: board/emulation/qemu-arm/ |
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F: include/configs/qemu-arm.h |
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F: configs/qemu_arm_defconfig |
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-y += qemu-arm.o
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/*
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* Copyright (c) 2017 Tuomas Tynkkynen |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <fdtdec.h> |
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int board_init(void) |
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{ |
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return 0; |
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} |
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int dram_init(void) |
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{ |
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if (fdtdec_setup_memory_size() != 0) |
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return -EINVAL; |
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return 0; |
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} |
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int dram_init_banksize(void) |
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{ |
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fdtdec_setup_memory_banksize(); |
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return 0; |
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} |
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void *board_fdt_blob_setup(void) |
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{ |
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/* QEMU loads a generated DTB for us at the start of RAM. */ |
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return (void *)CONFIG_SYS_SDRAM_BASE; |
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} |
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CONFIG_ARM=y |
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CONFIG_ARM_SMCCC=y |
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CONFIG_ARCH_QEMU=y |
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CONFIG_AHCI=y |
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CONFIG_DISTRO_DEFAULTS=y |
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# CONFIG_DISPLAY_CPUINFO is not set |
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# CONFIG_DISPLAY_BOARDINFO is not set |
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# CONFIG_CMD_IMLS is not set |
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CONFIG_CMD_PCI=y |
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CONFIG_CMD_USB=y |
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CONFIG_OF_BOARD=y |
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CONFIG_AHCI_PCI=y |
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CONFIG_BLK=y |
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# CONFIG_MMC is not set |
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CONFIG_DM_ETH=y |
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CONFIG_E1000=y |
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CONFIG_NVME=y |
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CONFIG_PCI=y |
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CONFIG_DM_PCI=y |
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CONFIG_PCIE_ECAM_GENERIC=y |
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CONFIG_SCSI=y |
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CONFIG_DM_SCSI=y |
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CONFIG_SYSRESET=y |
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CONFIG_SYSRESET_PSCI=y |
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CONFIG_USB=y |
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CONFIG_DM_USB=y |
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CONFIG_USB_EHCI_HCD=y |
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CONFIG_USB_EHCI_PCI=y |
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/*
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* Copyright (c) 2017 Tuomas Tynkkynen |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#ifndef __CONFIG_H |
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#define __CONFIG_H |
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#include <linux/sizes.h> |
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/* Physical memory map */ |
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#define CONFIG_SYS_TEXT_BASE 0x00000000 |
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#define CONFIG_NR_DRAM_BANKS 1 |
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#define CONFIG_SYS_SDRAM_BASE 0x40000000 |
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/* The DTB generated by QEMU is placed at start of RAM, stay away from there */ |
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#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_2M) |
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#define CONFIG_SYS_LOAD_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_2M) |
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#define CONFIG_SYS_MALLOC_LEN SZ_16M |
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/* QEMU's PL011 serial port is detected via FDT using the device model */ |
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#define CONFIG_PL01X_SERIAL |
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/* QEMU implements a 62.5MHz architected timer */ |
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/* FIXME: can we rely on CNTFREQ instead of hardcoding this fact here? */ |
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#define CONFIG_SYS_ARCH_TIMER |
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#define CONFIG_SYS_HZ 1000 |
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#define CONFIG_SYS_HZ_CLOCK 62500000 |
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/* For block devices, QEMU emulates an ICH9 AHCI controller over PCI */ |
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#define CONFIG_SYS_SCSI_MAX_SCSI_ID 6 |
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#define CONFIG_SCSI_AHCI |
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#define CONFIG_LIBATA |
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/* Environment options */ |
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#define CONFIG_ENV_SIZE SZ_64K |
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#include <config_distro_defaults.h> |
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#define BOOT_TARGET_DEVICES(func) \ |
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func(SCSI, scsi, 0) |
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#include <config_distro_bootcmd.h> |
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#define CONFIG_PREBOOT "pci enum" |
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#define CONFIG_EXTRA_ENV_SETTINGS \ |
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"fdt_high=0xffffffff\0" \
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"initrd_high=0xffffffff\0" \
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"fdt_addr=0x40000000\0" \
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"scriptaddr=0x40200000\0" \
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"pxefile_addr_r=0x40300000\0" \
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"kernel_addr_r=0x40400000\0" \
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"ramdisk_addr_r=0x44000000\0" \
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BOOTENV |
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#endif /* __CONFIG_H */ |
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Reference in new issue