On Tue, Oct 7, 2014 at 11:13 AM, Alistair Francis <alistai...@gmail.com> wrote:
> The Netduino 2 machine won't run unless the reset_pc is based
> on the ELF entry point.
>
> Signed-off-by: Alistair Francis <alistai...@gmail.com>
> Signed-off-by: Peter Crosthwaite <crosthwaite.pe...@gmail.com>
> ---
> V2:
> - Malloc straight away, thanks to Peter C
>
> hw/arm/armv7m.c | 19 ++++++++++++++++---
> 1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
> index 7169027..07b36e2 100644
> --- a/hw/arm/armv7m.c
> +++ b/hw/arm/armv7m.c
> @@ -155,11 +155,19 @@ static void armv7m_bitband_init(void)
>
> /* Board init. */
>
> +typedef struct ARMV7MResetArgs {
> + ARMCPU *cpu;
> + uint32_t reset_pc;
> +} ARMV7MResetArgs;
> +
> static void armv7m_reset(void *opaque)
> {
> - ARMCPU *cpu = opaque;
> + ARMV7MResetArgs *args = opaque;
> +
> + cpu_reset(CPU(args->cpu));
>
> - cpu_reset(CPU(cpu));
> + args->cpu->env.thumb = args->reset_pc & 1;
> + args->cpu->env.regs[15] = args->reset_pc & ~1;
> }
>
> /* Init CPU and memory for a v7-M based board.
> @@ -180,6 +188,7 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory, int
> mem_size, int num_irq,
> int i;
> int big_endian;
> MemoryRegion *hack = g_new(MemoryRegion, 1);
> + ARMV7MResetArgs *reset_args = g_new0(ARMV7MResetArgs, 1);
>
> if (cpu_model == NULL) {
> cpu_model = "cortex-m3";
> @@ -234,7 +243,11 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory, int
> mem_size, int num_irq,
> vmstate_register_ram_global(hack);
> memory_region_add_subregion(system_memory, 0xfffff000, hack);
>
> - qemu_register_reset(armv7m_reset, cpu);
> + *reset_args = (ARMV7MResetArgs) {
> + .cpu = cpu,
> + .reset_pc = entry,
> + };
> + qemu_register_reset(armv7m_reset, reset_args);
> return pic;
> }
How does this differ from what's being done in arm_cpu_reset for
ARMv7-M? What about the initial MSP?
--
Martín Galván
Software Engineer
Taller Technologies Argentina
San Lorenzo 47, 3rd Floor, Office 5
Córdoba, Argentina
Phone: 54 351 4217888 / +54 351 4218211
