Re: [PATCH v3 02/17] hw/arm: add Xunlong Orange Pi PC machine

[Niek Linnenbank <nieklinnenbank@gmail.com>]

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On Wed, Jan 8, 2020 at 11:44 PM Philippe Mathieu-Daudé <philmd@redhat.com>
wrote:

> On 1/8/20 9:00 PM, Niek Linnenbank wrote:
> > The Xunlong Orange Pi PC is an Allwinner H3 System on Chip
> > based embedded computer with mainline support in both U-Boot
> > and Linux. The board comes with a Quad Core Cortex A7 @ 1.3GHz,
> > 512MB RAM, 100Mbit ethernet, USB, SD/MMC, USB, HDMI and
> > various other I/O. This commit add support for the Xunlong
> > Orange Pi PC machine.
> >
> > Signed-off-by: Niek Linnenbank <nieklinnenbank@gmail.com>
> > Tested-by: KONRAD Frederic <frederic.konrad@adacore.com>
> > ---
> >   hw/arm/orangepi.c    | 93 ++++++++++++++++++++++++++++++++++++++++++++
> >   MAINTAINERS          |  1 +
> >   hw/arm/Makefile.objs |  2 +-
> >   3 files changed, 95 insertions(+), 1 deletion(-)
> >   create mode 100644 hw/arm/orangepi.c
> >
> > diff --git a/hw/arm/orangepi.c b/hw/arm/orangepi.c
> > new file mode 100644
> > index 0000000000..051184f14f
> > --- /dev/null
> > +++ b/hw/arm/orangepi.c
> > @@ -0,0 +1,93 @@
> > +/*
> > + * Orange Pi emulation
> > + *
> > + * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
> > + *
> > + * This program is free software: you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation, either version 2 of the License, or
> > + * (at your option) any later version.
> > + *
> > + * This program is distributed in the hope that it will be useful,
> > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > + * GNU General Public License for more details.
> > + *
> > + * You should have received a copy of the GNU General Public License
> > + * along with this program.  If not, see <http://www.gnu.org/licenses/
> >.
> > + */
> > +
> > +#include "qemu/osdep.h"
> > +#include "exec/address-spaces.h"
> > +#include "qapi/error.h"
> > +#include "cpu.h"
> > +#include "hw/sysbus.h"
> > +#include "hw/boards.h"
> > +#include "hw/qdev-properties.h"
> > +#include "hw/arm/allwinner-h3.h"
> > +#include "sysemu/sysemu.h"
> > +
> > +static struct arm_boot_info orangepi_binfo = {
> > +    .board_id = -1,
>
> Since you use a dtb, I suppose Linux ignores this board_id.
>
> Nitpick, you can set this here:
>
>         .nb_cpus = AW_H3_NUM_CPUS,
>
> > +};
> > +
> > +typedef struct OrangePiState {
> > +    AwH3State *h3;
> > +    MemoryRegion sdram;
> > +} OrangePiState;
> > +
> > +static void orangepi_init(MachineState *machine)
> > +{
> > +    OrangePiState *s = g_new(OrangePiState, 1);
> > +
>
> I'd do the bios check first, as it is cheap and avoid allocating RAM + H3:
>
>         /* Load target kernel or start using BootROM */
>         if (bios_name) {
>             error_report("BIOS not supported for this machine");
>             exit(1);
>         }
>
> > +    /* Only allow Cortex-A7 for this board */
> > +    if (strcmp(machine->cpu_type, ARM_CPU_TYPE_NAME("cortex-a7")) != 0)
> {
> > +        error_report("This board can only be used with cortex-a7 CPU");
> > +        exit(1);
> > +    }
> > +
> > +    s->h3 = AW_H3(object_new(TYPE_AW_H3));
> > +
> > +    /* Setup timer properties */
> > +    object_property_set_int(OBJECT(s->h3), 32768, "clk0-freq",
> > +                            &error_abort);
> > +    object_property_set_int(OBJECT(s->h3), 24000000, "clk1-freq",
>
> I find 24 * 1000 * 1000 easier to review.
>
> > +                            &error_abort);
> > +
> > +    /* Mark H3 object realized */
> > +    object_property_set_bool(OBJECT(s->h3), true, "realized",
> &error_abort);
> > +
> > +    /* SDRAM */
> > +    if (machine->ram_size != 1 * GiB) {
> > +        error_report("Requested ram size is not supported for this
> machine: "
> > +                     "restricted to 1GiB");
>
> Maybe easier as "This machine can only be used with 1GiB of RAM"
>
> > +        exit(1);
> > +    }
> > +    memory_region_allocate_system_memory(&s->sdram, NULL, "sdram",
> > +                                         machine->ram_size);
> > +    memory_region_add_subregion(get_system_memory(),
> s->h3->memmap[AW_H3_SDRAM],
> > +                                &s->sdram);
> > +
> > +    /* Load target kernel or start using BootROM */
> > +    if (bios_name) {
> > +        error_report("BIOS not supported for this machine");
> > +        exit(1);
> > +    }
> > +    orangepi_binfo.loader_start = s->h3->memmap[AW_H3_SDRAM];
> > +    orangepi_binfo.ram_size = machine->ram_size;
> > +    orangepi_binfo.nb_cpus  = AW_H3_NUM_CPUS;
> > +    arm_load_kernel(ARM_CPU(first_cpu), machine, &orangepi_binfo);
> > +}
> > +
> > +static void orangepi_machine_init(MachineClass *mc)
> > +{
> > +    mc->desc = "Orange Pi PC";
> > +    mc->init = orangepi_init;
> > +    mc->min_cpus = AW_H3_NUM_CPUS;
> > +    mc->max_cpus = AW_H3_NUM_CPUS;
> > +    mc->default_cpus = AW_H3_NUM_CPUS;
> > +    mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a7");
> > +    mc->default_ram_size = 1 * GiB;
> > +}
> > +
> > +DEFINE_MACHINE("orangepi-pc", orangepi_machine_init)
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index dc2d7991bf..6e1b92b5fa 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -487,6 +487,7 @@ L: qemu-arm@nongnu.org
> >   S: Maintained
> >   F: hw/*/allwinner-h3*
> >   F: include/hw/*/allwinner-h3*
> > +F: hw/arm/orangepi.c
> >
> >   ARM PrimeCell and CMSDK devices
> >   M: Peter Maydell <peter.maydell@linaro.org>
> > diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
> > index 956e496052..8d5ea453d5 100644
> > --- a/hw/arm/Makefile.objs
> > +++ b/hw/arm/Makefile.objs
> > @@ -34,7 +34,7 @@ obj-$(CONFIG_DIGIC) += digic.o
> >   obj-$(CONFIG_OMAP) += omap1.o omap2.o
> >   obj-$(CONFIG_STRONGARM) += strongarm.o
> >   obj-$(CONFIG_ALLWINNER_A10) += allwinner-a10.o cubieboard.o
> > -obj-$(CONFIG_ALLWINNER_H3) += allwinner-h3.o
> > +obj-$(CONFIG_ALLWINNER_H3) += allwinner-h3.o orangepi.o
> >   obj-$(CONFIG_RASPI) += bcm2835_peripherals.o bcm2836.o raspi.o
> >   obj-$(CONFIG_STM32F205_SOC) += stm32f205_soc.o
> >   obj-$(CONFIG_XLNX_ZYNQMP_ARM) += xlnx-zynqmp.o xlnx-zcu102.o
> >
>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
>
> Thanks Philippe! I will update the file with your comments and add the
reviewed by.

Regards
Niek

-- 
Niek Linnenbank

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