On Mon, 29 Apr 2019 at 06:39, Alistair Francis <alist...@alistair23.me> wrote:
>
> Signed-off-by: Alistair Francis <alist...@alistair23.me>
> ---
> MAINTAINERS | 6 +++
> default-configs/arm-softmmu.mak | 1 +
> hw/arm/Kconfig | 3 ++
> hw/arm/Makefile.objs | 1 +
> hw/arm/netduinoplus2.c | 77 +++++++++++++++++++++++++++++++++
> 5 files changed, 88 insertions(+)
> create mode 100644 hw/arm/netduinoplus2.c
>
> +typedef struct ARMV7MResetArgs {
> + ARMCPU *cpu;
> + uint32_t reset_sp;
> + uint32_t reset_pc;
> +} ARMV7MResetArgs;
> +
> +static void armv7m_reset(void *opaque)
> +{
> + ARMV7MResetArgs *args = opaque;
> +
> + cpu_reset(CPU(args->cpu));
> +
> + args->cpu->env.regs[13] = args->reset_sp & 0xFFFFFFFC;
> + args->cpu->env.thumb = args->reset_pc & 1;
> + args->cpu->env.regs[15] = args->reset_pc & ~1;
> +}
> +
> +static void netduinoplus2_init(MachineState *machine)
> +{
> + DeviceState *dev;
> + ARMV7MResetArgs reset_args;
> + uint64_t entry;
> +
> + dev = qdev_create(NULL, TYPE_STM32F405_SOC);
> + qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m4"));
> + object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
> +
> + armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> + FLASH_SIZE, &entry);
> +
> + reset_args = (ARMV7MResetArgs) {
> + .cpu = ARM_CPU(first_cpu),
> + .reset_pc = entry,
> + .reset_sp = (SRAM_BASE_ADDRESS + (SRAM_SIZE * 2) / 3),
> + };
> + qemu_register_reset(armv7m_reset,
> + g_memdup(&reset_args, sizeof(reset_args)));
> +}
Can you explain the purpose of the reset code? None of the other
v7m boards seem to need to do a manual qemu_register_reset().
thanks
-- PMM
