[PATCH 08/11] include: sbi: Add domains_init() platform operation

[Alistair Francis]

On Sat, 2020-11-21 at 15:17 +0530, Anup Patel wrote:
> We introduce domains_init() platform operation which can be used by
> platform support to initialize/populate domains in the coldboot path.
> 
> The domains_init() is called late in the coldboot sequence from the
> sbi_domain_finalize() so sbi_printf() can be used by platform support
> to print errors/warings at time of populating domains.
> 
> Signed-off-by: Anup Patel <anup.patel at wdc.com>

Reviewed-by: Alistair Francis <alistair.francis at wdc.com>

Alistair

> ---
>  include/sbi/sbi_platform.h | 16 ++++++++++++++++
>  lib/sbi/sbi_domain.c       |  8 ++++++++
>  2 files changed, 24 insertions(+)
> 
> diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h
> index e1355d8..7a8c113 100644
> --- a/include/sbi/sbi_platform.h
> +++ b/include/sbi/sbi_platform.h
> @@ -90,6 +90,8 @@ struct sbi_platform_operations {
>          */
>         int (*misa_get_xlen)(void);
>  
> +       /** Initialize (or populate) domains for the platform */
> +       int (*domains_init)(void);
>         /** Get domain pointer for given HART id */
>         struct sbi_domain *(*domain_get)(u32 hartid);
>  
> @@ -451,6 +453,20 @@ static inline int sbi_platform_misa_xlen(const
> struct sbi_platform *plat)
>         return -1;
>  }
>  
> +/**
> + * Initialize (or populate) domains for the platform
> + *
> + * @param plat pointer to struct sbi_platform
> + *
> + * @return 0 on success and negative error code on failure
> + */
> +static inline int sbi_platform_domains_init(const struct
> sbi_platform *plat)
> +{
> +       if (plat && sbi_platform_ops(plat)->domains_init)
> +               return sbi_platform_ops(plat)->domains_init();
> +       return 0;
> +}
> +
>  /**
>   * Get domain pointer for given HART
>   *
> diff --git a/lib/sbi/sbi_domain.c b/lib/sbi/sbi_domain.c
> index 639e016..1a3651b 100644
> --- a/lib/sbi/sbi_domain.c
> +++ b/lib/sbi/sbi_domain.c
> @@ -375,6 +375,14 @@ int sbi_domain_finalize(struct sbi_scratch
> *scratch, u32 cold_hartid)
>         struct sbi_domain *dom, *tdom;
>         const struct sbi_platform *plat = sbi_platform_ptr(scratch);
>  
> +       /* Initialize domains for the platform */
> +       rc = sbi_platform_domains_init(plat);
> +       if (rc) {
> +               sbi_printf("%s: platform domains_init() failed (error
> %d)\n",
> +                          __func__, rc);
> +               return rc;
> +       }
> +
>         /* Discover domains */
>         for (i = 0; i < SBI_HARTMASK_MAX_BITS; i++) {
>                 /* Ignore invalid HART */