Re: [Qemu-devel] [PATCH v5 03/30] target-ppc: Refactor PPC970

[Tom Musta <tommusta@gmail.com>]

On 6/4/2014 7:50 AM, Alexey Kardashevskiy wrote:
> This splits one init_proc_970() into a set of small helpers. Later
> init_proc_970() will be generalized and will call different set of helpers
> depending on the current CPU class.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
>  target-ppc/translate_init.c | 97 +++++++++++++++++++++++++++------------------
>  1 file changed, 58 insertions(+), 39 deletions(-)
> 
> diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
> index 649e893..04497e4 100644
> --- a/target-ppc/translate_init.c
> +++ b/target-ppc/translate_init.c
> @@ -7275,48 +7275,70 @@ static int check_pow_970 (CPUPPCState *env)
>      return 0;
>  }
>  
> +static void gen_spr_970_hid(CPUPPCState *env)
> +{
> +    /* Hardware implementation registers */
> +    /* XXX : not implemented */
> +    spr_register(env, SPR_HID0, "HID0",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_generic, &spr_write_clear,
> +                 0x60000000);
> +    spr_register(env, SPR_HID1, "HID1",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_generic, &spr_write_generic,
> +                 0x00000000);
> +    spr_register(env, SPR_970_HID5, "HID5",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_generic, &spr_write_generic,
> +                 POWERPC970_HID5_INIT);
> +}
> +
> +static void gen_spr_970_hior(CPUPPCState *env)
> +{
> +    spr_register(env, SPR_HIOR, "SPR_HIOR",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_hior, &spr_write_hior,
> +                 0x00000000);
> +}
> +
> +static void gen_spr_book3s_common(CPUPPCState *env)
> +{
> +    spr_register(env, SPR_CTRL, "SPR_CTRL",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 SPR_NOACCESS, &spr_write_generic,
> +                 0x00000000);
> +    spr_register(env, SPR_UCTRL, "SPR_UCTRL",
> +                 SPR_NOACCESS, SPR_NOACCESS,
> +                 &spr_read_generic, SPR_NOACCESS,
> +                 0x00000000);
> +}
> +
> +static void gen_spr_book3s_altivec(CPUPPCState *env)
> +{
> +    if (!(env->insns_flags & PPC_ALTIVEC)) {
> +        return;
> +    }
> +
> +    spr_register(env, SPR_VRSAVE, "SPR_VRSAVE",
> +                 &spr_read_generic, &spr_write_generic,
> +                 &spr_read_generic, &spr_write_generic,
> +                 0x00000000);
> +
> +    /* Can't find information on what this should be on reset.  This
> +     * value is the one used by 74xx processors. */
> +    vscr_init(env, 0x00010000);
> +}
> +
>  static void init_proc_970 (CPUPPCState *env)
>  {
>      gen_spr_ne_601(env);
>      gen_spr_7xx(env);
> -    /* Time base */
>      gen_tbl(env);
> -    /* Hardware implementation registers */
> -    /* XXX : not implemented */
> -    spr_register(env, SPR_HID0, "HID0",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 &spr_read_generic, &spr_write_clear,
> -                 0x60000000);
> -    /* XXX : not implemented */
> -    spr_register(env, SPR_HID1, "HID1",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 &spr_read_generic, &spr_write_generic,
> -                 0x00000000);
> -    /* XXX : not implemented */
> -    spr_register(env, SPR_970_HID5, "HID5",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 &spr_read_generic, &spr_write_generic,
> -                 POWERPC970_HID5_INIT);
> -    /* Memory management */
> -    /* XXX: not correct */
> +    gen_spr_book3s_altivec(env);
> +    gen_spr_970_hid(env);
> +    gen_spr_970_hior(env);
>      gen_low_BATs(env);
> -    spr_register(env, SPR_HIOR, "SPR_HIOR",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 &spr_read_hior, &spr_write_hior,
> -                 0x00000000);
> -
> -    spr_register(env, SPR_CTRL, "SPR_CTRL",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 SPR_NOACCESS, &spr_write_generic,
> -                 0x00000000);
> -    spr_register(env, SPR_UCTRL, "SPR_UCTRL",
> -                 SPR_NOACCESS, SPR_NOACCESS,
> -                 &spr_read_generic, SPR_NOACCESS,
> -                 0x00000000);
> -    spr_register(env, SPR_VRSAVE, "SPR_VRSAVE",
> -                 &spr_read_generic, &spr_write_generic,
> -                 &spr_read_generic, &spr_write_generic,
> -                 0x00000000);
> +    gen_spr_book3s_common(env);
>  #if !defined(CONFIG_USER_ONLY)
>      env->slb_nr = 64;
>  #endif
> @@ -7325,9 +7347,6 @@ static void init_proc_970 (CPUPPCState *env)
>      env->icache_line_size = 128;
>      /* Allocate hardware IRQ controller */
>      ppc970_irq_init(env);
> -    /* Can't find information on what this should be on reset.  This
> -     * value is the one used by 74xx processors. */
> -    vscr_init(env, 0x00010000);
>  }
>  
>  POWERPC_FAMILY(970)(ObjectClass *oc, void *data)
> 

Reviewed-by: Tom Musta <tommusta@gmail.com>