linux-kernel - Re: [PATCHv2 5/8] ARM: EXYNOS: Support secondary CPU boot of Exynos3250

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Message-id: <534E9374.6010807@samsung.com>
Date:	Wed, 16 Apr 2014 16:28:04 +0200
From:	Tomasz Figa <t.figa@...sung.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>, linux-kernel@...r.kernel.org
Cc:	linux@....linux.org.uk, ben-linux@...ff.org, kgene.kim@...sung.com,
	thomas.abraham@...aro.org, kyungmin.park@...sung.com,
	sw0312.kim@...sung.com, hyunhee.kim@...sung.com,
	yj44.cho@...sung.com, chanho61.park@...sung.com, arnd@...db.de,
	olof@...om.net, marc.zyngier@....com,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCHv2 5/8] ARM: EXYNOS: Support secondary CPU boot of Exynos3250

Hi Chanwoo,

On 15.04.2014 03:59, Chanwoo Choi wrote:
> This patch fix the offset of CPU boot address and don't operate smc call
> of SMC_CMD_CPU1BOOT command for Exynos3250.
>
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>   arch/arm/mach-exynos/firmware.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
> index aa01c42..6205d4f 100644
> --- a/arch/arm/mach-exynos/firmware.c
> +++ b/arch/arm/mach-exynos/firmware.c
> @@ -30,13 +30,16 @@ static int exynos_do_idle(void)
>
>   static int exynos_cpu_boot(int cpu)
>   {
> +	if (soc_is_exynos3250()) {
> +		return 0;

This is strange. How the firmware knows when to boot the CPU then, if 
CPU1BOOT command is not called?

Best regards,
Tomasz
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