Hi,
On 08/31/2017 09:55 AM, Bin Meng wrote:
Hi Tuomas,
On Wed, Aug 30, 2017 at 4:31 PM, Tuomas Tynkkynen tuomas.tynkkynen@iki.fi wrote:
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 enable 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 enable 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
Can we enable the NVMe driver (CONFIG_NVME) here?
Yes, 'nvme scan' and 'nvme list' it appear to work. I'll enable it. There is a bunch of spew of this form though:
CACHE: Misaligned operation at range [bef5d000, bef5d020]
Signed-off-by: Tuomas Tynkkynen tuomas.tynkkynen@iki.fi
arch/arm/Kconfig | 10 ++++++++ arch/arm/mach-qemu/Kconfig | 9 +++++++ board/qemu-arm/Makefile | 5 ++++ board/qemu-arm/qemu-arm.c | 35 ++++++++++++++++++++++++++ configs/qemu_arm_defconfig | 27 ++++++++++++++++++++ include/configs/qemu-arm.h | 63 ++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 149 insertions(+) create mode 100644 arch/arm/mach-qemu/Kconfig create mode 100644 board/qemu-arm/Makefile create mode 100644 board/qemu-arm/qemu-arm.c create mode 100644 configs/qemu_arm_defconfig create mode 100644 include/configs/qemu-arm.h
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 53d0831935..0d01ba1b73 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -630,6 +630,14 @@ config ARCH_MX5 select CPU_V7 select BOARD_EARLY_INIT_F
+config ARCH_QEMU
bool "QEMU Virtual Platform"select CPU_V7select ARCH_SUPPORT_PSCIselect DMselect DM_SERIALselect OF_CONTROL- config ARCH_RMOBILE bool "Renesas ARM SoCs" select DM
@@ -1149,6 +1157,8 @@ source "arch/arm/mach-stm32/Kconfig"
source "arch/arm/mach-sunxi/Kconfig"
+source "arch/arm/mach-qemu/Kconfig"
Can you insert this by following alphabetical order?
Oops, yes of course.
source "arch/arm/mach-tegra/Kconfig"
source "arch/arm/mach-uniphier/Kconfig" diff --git a/arch/arm/mach-qemu/Kconfig b/arch/arm/mach-qemu/Kconfig new file mode 100644 index 0000000000..89d2a36719 --- /dev/null +++ b/arch/arm/mach-qemu/Kconfig @@ -0,0 +1,9 @@ +if ARCH_QEMU
+config SYS_BOARD
default "qemu-arm"+config SYS_CONFIG_NAME
default "qemu-arm"+endif diff --git a/board/qemu-arm/Makefile b/board/qemu-arm/Makefile new file mode 100644 index 0000000000..3e9907d983 --- /dev/null +++ b/board/qemu-arm/Makefile
Can this new board be put into the board/emulation/qemu-arm directory? Since qemu-x86 is put there.
Sure. There is still qemu-mips directly under board/ though.
@@ -0,0 +1,5 @@ +# +# SPDX-License-Identifier: GPL-2.0 +#
+obj-y += qemu-arm.o diff --git a/board/qemu-arm/qemu-arm.c b/board/qemu-arm/qemu-arm.c new file mode 100644 index 0000000000..90d7badbf4 --- /dev/null +++ b/board/qemu-arm/qemu-arm.c @@ -0,0 +1,35 @@ +/*
- Copyright (c) 2017 Tuomas Tynkkynen
- SPDX-License-Identifier: GPL-2.0+
- */
+#include <common.h> +#include <fdtdec.h>
+DECLARE_GLOBAL_DATA_PTR;
This is not needed as gd is not referenced in this file.
Now removed.
Thank you for the review.