Re: [PATCH 10/11] stm32f205: Create armv7m object without using armv7m_init()

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

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

> Switch the stm32f205 SoC to create the armv7m object directly
> rather than via the armv7m_init() wrapper. This fits better
> with the SoC model's very QOMified design.
>
> In particular this means we can push loading the guest image
> out to the top level board code where it belongs, rather
> than the SoC object having a QOM property for the filename
> to load.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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

> ---
>  include/hw/arm/stm32f205_soc.h |  4 +++-
>  hw/arm/netduino2.c             |  7 ++++---
>  hw/arm/stm32f205_soc.c         | 16 +++++++++++++---
>  3 files changed, 20 insertions(+), 7 deletions(-)
>
> diff --git a/include/hw/arm/stm32f205_soc.h b/include/hw/arm/stm32f205_soc.h
> index 1332141..e2dce11 100644
> --- a/include/hw/arm/stm32f205_soc.h
> +++ b/include/hw/arm/stm32f205_soc.h
> @@ -31,6 +31,7 @@
>  #include "hw/adc/stm32f2xx_adc.h"
>  #include "hw/or-irq.h"
>  #include "hw/ssi/stm32f2xx_spi.h"
> +#include "hw/arm/armv7m.h"
>
>  #define TYPE_STM32F205_SOC "stm32f205-soc"
>  #define STM32F205_SOC(obj) \
> @@ -51,9 +52,10 @@ typedef struct STM32F205State {
>      SysBusDevice parent_obj;
>      /*< public >*/
>
> -    char *kernel_filename;
>      char *cpu_model;
>
> +    ARMv7MState armv7m;
> +
>      STM32F2XXSyscfgState syscfg;
>      STM32F2XXUsartState usart[STM_NUM_USARTS];
>      STM32F2XXTimerState timer[STM_NUM_TIMERS];
> diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
> index 23d7928..3cfe332 100644
> --- a/hw/arm/netduino2.c
> +++ b/hw/arm/netduino2.c
> @@ -27,17 +27,18 @@
>  #include "hw/boards.h"
>  #include "qemu/error-report.h"
>  #include "hw/arm/stm32f205_soc.h"
> +#include "hw/arm/arm.h"
>
>  static void netduino2_init(MachineState *machine)
>  {
>      DeviceState *dev;
>
>      dev = qdev_create(NULL, TYPE_STM32F205_SOC);
> -    if (machine->kernel_filename) {
> -        qdev_prop_set_string(dev, "kernel-filename", machine->kernel_filename);
> -    }
>      qdev_prop_set_string(dev, "cpu-model", "cortex-m3");
>      object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
> +
> +    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> +                       FLASH_SIZE);
>  }
>
>  static void netduino2_machine_init(MachineClass *mc)
> diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
> index 38425bd..e6bd73a 100644
> --- a/hw/arm/stm32f205_soc.c
> +++ b/hw/arm/stm32f205_soc.c
> @@ -49,6 +49,9 @@ static void stm32f205_soc_initfn(Object *obj)
>      STM32F205State *s = STM32F205_SOC(obj);
>      int i;
>
> +    object_initialize(&s->armv7m, sizeof(s->armv7m), TYPE_ARMV7M);
> +    qdev_set_parent_bus(DEVICE(&s->armv7m), sysbus_get_default());
> +
>      object_initialize(&s->syscfg, sizeof(s->syscfg), TYPE_STM32F2XX_SYSCFG);
>      qdev_set_parent_bus(DEVICE(&s->syscfg), sysbus_get_default());
>
> @@ -110,8 +113,16 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
>      vmstate_register_ram_global(sram);
>      memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, sram);
>
> -    nvic = armv7m_init(get_system_memory(), FLASH_SIZE, 96,
> -                       s->kernel_filename, s->cpu_model);
> +    nvic = DEVICE(&s->armv7m);
> +    qdev_prop_set_uint32(nvic, "num-irq", 96);
> +    qdev_prop_set_string(nvic, "cpu-model", s->cpu_model);
> +    object_property_set_link(OBJECT(&s->armv7m), OBJECT(get_system_memory()),
> +                                     "memory", &error_abort);
> +    object_property_set_bool(OBJECT(&s->armv7m), true, "realized", &err);
> +    if (err != NULL) {
> +        error_propagate(errp, err);
> +        return;
> +    }
>
>      /* System configuration controller */
>      dev = DEVICE(&s->syscfg);
> @@ -192,7 +203,6 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp)
>  }
>
>  static Property stm32f205_soc_properties[] = {
> -    DEFINE_PROP_STRING("kernel-filename", STM32F205State, kernel_filename),
>      DEFINE_PROP_STRING("cpu-model", STM32F205State, cpu_model),
>      DEFINE_PROP_END_OF_LIST(),
>  };


--
Alex Bennée