Re: [PATCHv4 3/7] ARM: EXYNOS: Support secondary CPU boot of Exynos3250

[Tushar Behera <tushar.behera@linaro.org>]

On 04/25/2014 06:46 AM, Chanwoo Choi wrote:
> This patch fix the offset of CPU boot address and don't need to send smc call
> of SMC_CMD_CPU1BOOT command for secondary CPU boot because Exynos3250 removes
> WFE in secure mode.
> 
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  arch/arm/mach-exynos/firmware.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
> index aa01c42..386d01d 100644
> --- a/arch/arm/mach-exynos/firmware.c
> +++ b/arch/arm/mach-exynos/firmware.c
> @@ -31,11 +31,17 @@ static int exynos_do_idle(void)
>  static int exynos_cpu_boot(int cpu)
>  {
>  	/*
> +	 * Exynos3250 doesn't need to send smc command for secondary CPU boot
> +	 * because Exynos3250 removes WFE in secure mode.
> +	 */
> +	if (soc_is_exynos3250())
> +		return 0;
> +	/*
>  	 * The second parameter of SMC_CMD_CPU1BOOT command means CPU id.
>  	 * But, Exynos4212 has only one secondary CPU so second parameter
>  	 * isn't used for informing secure firmware about CPU id.
>  	 */
> -	if (soc_is_exynos4212())
> +	else if (soc_is_exynos4212())

This changes is not required.

>  		cpu = 0;
>  
>  	exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0);
> @@ -46,7 +52,7 @@ static int exynos_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
>  {
>  	void __iomem *boot_reg = S5P_VA_SYSRAM_NS + 0x1c;
>  
> -	if (!soc_is_exynos4212())
> +	if (!soc_is_exynos4212() && !soc_is_exynos3250())
>  		boot_reg += 4*cpu;
>  
>  	__raw_writel(boot_addr, boot_reg);
> 


-- 
Tushar Behera