linux-kernel - Re: [PATCH v2 01/17] sh: Add sh-specific early_init_dt_reserve_memory

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Date:	Sun, 12 Jun 2016 14:29:42 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/17] sh: Add sh-specific
 early_init_dt_reserve_memory_arch

On 6/12/2016 9:54 AM, Yoshinori Sato wrote:

> sh used P1 address space in early device tree.
> So need convert P1 to physical address before reserve memory.
>
> Signed-off-by: Yoshinori Sato <ysato@...rs.sourceforge.jp>
> ---
>  arch/sh/boards/of-generic.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c
> index 57d45dc..fe2d917 100644
> --- a/arch/sh/boards/of-generic.c
> +++ b/arch/sh/boards/of-generic.c
[...]
> @@ -203,3 +204,14 @@ static int __init sh_of_device_init(void)
>  	return 0;
>  }
>  arch_initcall_sync(sh_of_device_init);
> +
> +int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
> +					     phys_addr_t size, bool nomap)
> +{
> +	if (nomap)
> +		return memblock_remove(base, size);
> +
> +	if (base >= P1SEG)
> +		base = base & ~P1SEG;

		base &= ~P1SEG;

> +	return memblock_reserve(base, size);
> +}

MBR, Sergei