[PATCH v6 25/37] board: emulation: Add QEMU sbsa support
Tom Rini
trini at konsulko.com
Thu Oct 3 03:35:16 CEST 2024
On Wed, Oct 02, 2024 at 04:55:34PM -0600, Simon Glass wrote:
> Hi Patrick,
>
> On Wed, 2 Oct 2024 at 03:52, Patrick Rudolph
> <patrick.rudolph at 9elements.com> wrote:
> >
> > Add support for Arm sbsa [1] v0.3+ that is supported by QEMU [2].
> >
> > Unlike other Arm based platforms the machine only provides a minimal
> > FDT that contains number of CPUs, ammount of memory and machine-version.
> > The boot firmware has to provide ACPI tables to the OS.
> > Due to this design a full DTB is added here as well that allows U-Boot's
> > driver to properly function. The DTB is appended at the end of the U-Boot
> > image and will be merged with the QEMU provided DTB.
> >
> > In addition provide documentation how to use, enable binman to fabricate both
> > ROMs that are required to boot and add ACPI tables to make it full compatible
> > to the EDK2 reference implementation.
> >
> > The board was tested using Fedora 40 Aarch64 Workstation. It's able
> > to boot from USB and AHCI or network.
> >
> > Tested and found working:
> > - serial
> > - PCI
> > - xHCI
> > - Bochs display
> > - AHCI
> > - network using e1000e
> > - CPU init
> > - Booting Fedora 40
> >
> > 1: Server Base System Architecture (SBSA)
> > 2: https://www.qemu.org/docs/master/system/arm/sbsa.html
> >
> > Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
> > Cc: Peter Robinson <pbrobinson at gmail.com>
> > Cc: Simon Glass <sjg at chromium.org>
> > Cc: Tom Rini <trini at konsulko.com>
> > ---
> > Changelog v3:
> > - Add GIC and GIC-ITS to devicetree
> > - Select GICv3 driver
> > - Drop acpi_fill_madt and use driver model instead
> > Changelog v4:
> > - Drop CPU platform code
> > - Enhance the DT to allow MADT generation from DT
> > Changelog v5:
> > - Add full DT and place it at the end of U-Boot
> > - Merge DT with QEMU's DT
> > - Drop DT generation code
> > - Fix flash region length
> > - Drop enable_caches()
> > - Support platforms that do not pass FDT in x0
> > Changelog v6:
> > - Update header order
> > - Drop pad-byte from DT
> > - select BINMAN_FDT
> > - select E1000_NO_NVM
> > - drop config.h include
> > - drop a few CFG_ defines that were used for SPL
> >
> > ---
> > arch/arm/Kconfig | 3 +-
> > arch/arm/dts/qemu-sbsa.dts | 136 ++++++
> > arch/arm/include/asm/arch-qemu-sbsa/boot0.h | 34 ++
> > arch/arm/mach-qemu/Kconfig | 36 +-
> > board/emulation/qemu-arm/MAINTAINERS | 2 +
> > board/emulation/qemu-sbsa/Kconfig | 57 +++
> > board/emulation/qemu-sbsa/Makefile | 8 +
> > board/emulation/qemu-sbsa/acpi.c | 192 ++++++++
> > board/emulation/qemu-sbsa/dsdt.asl | 483 ++++++++++++++++++++
> > board/emulation/qemu-sbsa/lowlevel_init.S | 22 +
> > board/emulation/qemu-sbsa/qemu-sbsa.c | 311 +++++++++++++
> > board/emulation/qemu-sbsa/qemu-sbsa.env | 14 +
> > board/emulation/qemu-sbsa/qemu-sbsa.h | 38 ++
> > board/emulation/qemu-sbsa/smc.c | 71 +++
> > configs/qemu-arm-sbsa_defconfig | 10 +
> > doc/board/emulation/index.rst | 1 +
> > doc/board/emulation/qemu-sbsa.rst | 98 ++++
> > doc/develop/driver-model/virtio.rst | 1 +
> > include/configs/qemu-sbsa.h | 95 ++++
> > 19 files changed, 1605 insertions(+), 7 deletions(-)
> > create mode 100644 arch/arm/dts/qemu-sbsa.dts
> > create mode 100644 arch/arm/include/asm/arch-qemu-sbsa/boot0.h
> > create mode 100644 board/emulation/qemu-sbsa/Kconfig
> > create mode 100644 board/emulation/qemu-sbsa/Makefile
> > create mode 100644 board/emulation/qemu-sbsa/acpi.c
> > create mode 100644 board/emulation/qemu-sbsa/dsdt.asl
> > create mode 100644 board/emulation/qemu-sbsa/lowlevel_init.S
> > create mode 100644 board/emulation/qemu-sbsa/qemu-sbsa.c
> > create mode 100644 board/emulation/qemu-sbsa/qemu-sbsa.env
> > create mode 100644 board/emulation/qemu-sbsa/qemu-sbsa.h
> > create mode 100644 board/emulation/qemu-sbsa/smc.c
> > create mode 100644 configs/qemu-arm-sbsa_defconfig
> > create mode 100644 doc/board/emulation/qemu-sbsa.rst
> > create mode 100644 include/configs/qemu-sbsa.h
>
> With the tweaks below:
>
> Reviewed-by: Simon Glass <sjg at chromium.org>
>
> [..]
>
> > diff --git a/arch/arm/dts/qemu-sbsa.dts b/arch/arm/dts/qemu-sbsa.dts
> > new file mode 100644
> > index 0000000000..f743ea3863
> > --- /dev/null
> > +++ b/arch/arm/dts/qemu-sbsa.dts
> > @@ -0,0 +1,136 @@
> > +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> > +/*
> > + * Devicetree with onboard devices for qemu_sbsa-ref for internal use only!
> > + * DO NOT PASS TO THE OS!
> > + *
> > + * As QEMU provides only a minimal devicetree this one is merged with
> > + * it and then fixed at runtime.
> > + *
> > + * Copyright 2024 9elements GmbH
> > + */
> > +#include "configs/qemu-sbsa.h"
> > +
> > +/dts-v1/;
> > +
> > +#define MAKE_PROP(x) (x>>32) (x&0xffffffff)
> > +
> > +/ {
> > + #address-cells = <2>;
> > + #size-cells = <2>;
> > + interrupt-parent = <&intc>;
> > + compatible = "linux,sbsa-ref";
> > +
> > + binman: binman {
> > + multiple-images;
> > + };
> > +
> > + cpus {
> > + /* Filled by fdtdec_board_setup() */
> > + };
> > +
> > + memory {
> > + /* Filled by fdtdec_board_setup() */
> > + };
> > +
> > + soc {
> > + compatible = "simple-bus";
> > + #address-cells = <2>;
> > + #size-cells = <2>;
> > + ranges;
> > +
> > + uart0 {
> > + compatible = "arm,pl011";
> > + status = "okay";
> > + reg = <MAKE_PROP(SBSA_UART_BASE_ADDR)
>
> Can you use
>
> reg = /bits 64/ <0x60000000>
>
> instead?
>
> Same for those below.
Isn't that less readable ?
--
Tom
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