Re: [Xen-devel] [PATCH 07/16] xen: arm: Handle cpus nodes with #address-calls > 1

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 11/20/2013 02:48 PM, Ian Campbell wrote:
> The APM X-Gene Mustang board DTS has #address-cells = 2.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> ---
>  xen/arch/arm/smpboot.c |   25 +++++++++++++++++++++----
>  1 file changed, 21 insertions(+), 4 deletions(-)
> 
> diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
> index 6c90fa6..ce832ae 100644
> --- a/xen/arch/arm/smpboot.c
> +++ b/xen/arch/arm/smpboot.c
> @@ -125,18 +125,35 @@ void __init smp_init_cpus(void)
>  
>      dt_for_each_child_node( cpus, cpu )
>      {
> +        const __be32 *prop;
> +        u64 addr, size;
>          u32 hwid;
>  
>          if ( !dt_device_type_is_equal(cpu, "cpu") )
>              continue;
>  
> -        if ( !dt_property_read_u32(cpu, "reg", &hwid) )
> +        if ( dt_n_size_cells(cpu) != 0 )
> +            printk(XENLOG_WARNING "cpu node `%s`: #size-cells %d\n",
> +                   dt_node_full_name(cpu), dt_n_size_cells(cpu));
> +
> +        prop = dt_get_property(cpu, "reg", NULL);
> +        if ( !prop )
>          {
> -            printk(XENLOG_WARNING "cpu node `%s`: missing reg property\n",
> +            printk(XENLOG_WARNING "cpu node `%s`: has no reg property\n",
>                     dt_node_full_name(cpu));
>              continue;
>          }
>  
> +        dt_get_range(&prop, cpu, &addr, &size);

You can use dt_read_number here.

> +
> +        hwid = addr;
> +        if ( hwid != addr )
> +        {
> +            printk(XENLOG_WARNING "cpu node `%s`: hwid overflow %"PRIx64"\n",
> +                   dt_node_full_name(cpu), addr);
> +            continue;
> +        }
> +
>          /*
>           * 8 MSBs must be set to 0 in the DT since the reg property
>           * defines the MPIDR[23:0]
> @@ -159,8 +176,8 @@ void __init smp_init_cpus(void)
>              if ( tmp_map[j] == hwid )
>              {
>                  printk(XENLOG_WARNING
> -                       "cpu node `%s`: duplicate /cpu reg properties in the 
> DT\n",
> -                       dt_node_full_name(cpu));
> +                       "cpu node `%s`: duplicate /cpu reg properties 
> %"PRIx32" in the DT\n",
> +                       dt_node_full_name(cpu), hwid);
>                  break;
>              }
>          }
> 


-- 
Julien Grall

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