u-boot/include/configs/qemu-arm.h
Tuomas Tynkkynen 32f1182926 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 <tuomas.tynkkynen@iki.fi>
2017-10-06 11:28:16 -04:00

58 lines
1.5 KiB
C

/*
* Copyright (c) 2017 Tuomas Tynkkynen
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#include <linux/sizes.h>
/* Physical memory map */
#define CONFIG_SYS_TEXT_BASE 0x00000000
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_SYS_SDRAM_BASE 0x40000000
/* The DTB generated by QEMU is placed at start of RAM, stay away from there */
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_2M)
#define CONFIG_SYS_LOAD_ADDR (CONFIG_SYS_SDRAM_BASE + SZ_2M)
#define CONFIG_SYS_MALLOC_LEN SZ_16M
/* QEMU's PL011 serial port is detected via FDT using the device model */
#define CONFIG_PL01X_SERIAL
/* QEMU implements a 62.5MHz architected timer */
/* FIXME: can we rely on CNTFREQ instead of hardcoding this fact here? */
#define CONFIG_SYS_ARCH_TIMER
#define CONFIG_SYS_HZ 1000
#define CONFIG_SYS_HZ_CLOCK 62500000
/* For block devices, QEMU emulates an ICH9 AHCI controller over PCI */
#define CONFIG_SYS_SCSI_MAX_SCSI_ID 6
#define CONFIG_SCSI_AHCI
#define CONFIG_LIBATA
/* Environment options */
#define CONFIG_ENV_SIZE SZ_64K
#include <config_distro_defaults.h>
#define BOOT_TARGET_DEVICES(func) \
func(SCSI, scsi, 0)
#include <config_distro_bootcmd.h>
#define CONFIG_PREBOOT "pci enum"
#define CONFIG_EXTRA_ENV_SETTINGS \
"fdt_high=0xffffffff\0" \
"initrd_high=0xffffffff\0" \
"fdt_addr=0x40000000\0" \
"scriptaddr=0x40200000\0" \
"pxefile_addr_r=0x40300000\0" \
"kernel_addr_r=0x40400000\0" \
"ramdisk_addr_r=0x44000000\0" \
BOOTENV
#endif /* __CONFIG_H */