Re: [Qemu-devel] [PATCH 25/27] hw/arm/iotkit: Instantiate MPC

["Alex Bennée" <alex.bennee@linaro.org>]

Peter Maydell <peter.maydell@linaro.org> writes:

> Wire up the one MPC that is part of the IoTKit itself. For the
> moment we don't wire up its interrupt line.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  include/hw/arm/iotkit.h |  2 ++
>  hw/arm/iotkit.c         | 38 +++++++++++++++++++++++++++-----------
>  2 files changed, 29 insertions(+), 11 deletions(-)
>
> diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
> index c6129d926b..b21cf1ab9d 100644
> --- a/include/hw/arm/iotkit.h
> +++ b/include/hw/arm/iotkit.h
> @@ -51,6 +51,7 @@
>  #include "hw/arm/armv7m.h"
>  #include "hw/misc/iotkit-secctl.h"
>  #include "hw/misc/tz-ppc.h"
> +#include "hw/misc/tz-mpc.h"
>  #include "hw/timer/cmsdk-apb-timer.h"
>  #include "hw/misc/unimp.h"
>  #include "hw/or-irq.h"
> @@ -74,6 +75,7 @@ typedef struct IoTKit {
>      IoTKitSecCtl secctl;
>      TZPPC apb_ppc0;
>      TZPPC apb_ppc1;
> +    TZMPC mpc;
>      CMSDKAPBTIMER timer0;
>      CMSDKAPBTIMER timer1;
>      qemu_or_irq ppc_irq_orgate;
> diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
> index 234185e8f7..160e40c744 100644
> --- a/hw/arm/iotkit.c
> +++ b/hw/arm/iotkit.c
> @@ -130,6 +130,7 @@ static void iotkit_init(Object *obj)
>                        TYPE_TZ_PPC);
>      init_sysbus_child(obj, "apb-ppc1", &s->apb_ppc1, sizeof(s->apb_ppc1),
>                        TYPE_TZ_PPC);
> +    init_sysbus_child(obj, "mpc", &s->mpc, sizeof(s->mpc), TYPE_TZ_MPC);
>      init_sysbus_child(obj, "timer0", &s->timer0, sizeof(s->timer0),
>                        TYPE_CMSDK_APB_TIMER);
>      init_sysbus_child(obj, "timer1", &s->timer1, sizeof(s->timer1),
> @@ -266,15 +267,6 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
>       */
>      make_alias(s, &s->alias3, "alias 3", 0x50000000, 0x10000000, 0x40000000);
>
> -    /* This RAM should be behind a Memory Protection Controller, but we
> -     * don't implement that yet.
> -     */
> -    memory_region_init_ram(&s->sram0, NULL, "iotkit.sram0", 0x00008000, &err);
> -    if (err) {
> -        error_propagate(errp, err);
> -        return;
> -    }
> -    memory_region_add_subregion(&s->container, 0x20000000, &s->sram0);
>
>      /* Security controller */
>      object_property_set_bool(OBJECT(&s->secctl), true, "realized", &err);
> @@ -310,6 +302,32 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
>      qdev_connect_gpio_out_named(dev_secctl, "sec_resp_cfg", 0,
>                                  qdev_get_gpio_in(dev_splitter, 0));
>
> +    /* This RAM lives behind the Memory Protection Controller */
> +    memory_region_init_ram(&s->sram0, NULL, "iotkit.sram0", 0x00008000, &err);
> +    if (err) {
> +        error_propagate(errp, err);
> +        return;
> +    }
> +    object_property_set_link(OBJECT(&s->mpc), OBJECT(&s->sram0),
> +                             "downstream", &err);
> +    if (err) {
> +        error_propagate(errp, err);
> +        return;
> +    }
> +    object_property_set_bool(OBJECT(&s->mpc), true, "realized", &err);
> +    if (err) {
> +        error_propagate(errp, err);
> +        return;
> +    }
> +    /* Map the upstream end of the MPC into the right place... */
> +    memory_region_add_subregion(&s->container, 0x20000000,
> +                                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mpc),
> +                                                       1));
> +    /* ...and its register interface */
> +    memory_region_add_subregion(&s->container, 0x50083000,
> +                                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mpc),
> +                                                       0));
> +
>      /* Devices behind APB PPC0:
>       *   0x40000000: timer0
>       *   0x40001000: timer1
> @@ -473,8 +491,6 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
>      create_unimplemented_device("NS watchdog", 0x40081000, 0x1000);
>      create_unimplemented_device("S watchdog", 0x50081000, 0x1000);
>
> -    create_unimplemented_device("SRAM0 MPC", 0x50083000, 0x1000);
> -
>      for (i = 0; i < ARRAY_SIZE(s->ppc_irq_splitter); i++) {
>          Object *splitter = OBJECT(&s->ppc_irq_splitter[i]);


--
Alex Bennée