Re: [Qemu-devel] [PATCH RFC v3 06/21] target-arm: Prepare model-specific class_init function

[Anthony Liguori <anthony@codemonkey.ws>]

On 02/02/2012 08:59 PM, Andreas Färber wrote:
> This allows to share initialization between CPU models.
>
> Signed-off-by: Andreas Färber<afaerber@suse.de>
> ---
>   target-arm/cpu.c |    5 +++++
>   1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/target-arm/cpu.c b/target-arm/cpu.c
> index 43231c9..b794ec1 100644
> --- a/target-arm/cpu.c
> +++ b/target-arm/cpu.c
> @@ -96,6 +96,7 @@ static void arm_cpu_reset(CPU *c)
>   typedef struct ARMCPUInfo {
>       const char *name;
>       uint32_t id;
> +    void (*class_init)(ARMCPUClass *klass, const struct ARMCPUInfo *info);
>   } ARMCPUInfo;

So could you do:

TypeInfo arm_cpus[] = {
    {
	.name = "arm-cpu-model",
         .parent = TYPE_ARM_CPU,
         .class_data = (void *)(intptr_t)0x2342342,
         .class_init = arm_generic_init,
    }

It's roughly the same code but then there isn't redirection.  You can do this in 
general by having something like:

.class_data = (SpecialInfo[]){ .id = 0x23423423 },

Regards,

Anthony Liguori

>
>   static const ARMCPUInfo arm_cpus[] = {
> @@ -230,6 +231,10 @@ static void arm_cpu_class_init(ObjectClass *klass, void *data)
>       cpu_class->reset = arm_cpu_reset;
>
>       k->cp15.c0_cpuid = info->id;
> +
> +    if (info->class_init != NULL) {
> +        (*info->class_init)(k, info);
> +    }
>   }
>
>   static void cpu_register(const ARMCPUInfo *info)