linux-kernel - Re: [PATCH v4 6/7] ARM: EXYNOS: Add support for non-secure L2X0 resume

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Date:	Mon, 15 Sep 2014 23:31:18 +0200
From:	Tomasz Figa <tomasz.figa@...il.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>, lauraa@...eaurora.org,
	linux-omap@...r.kernel.org, linus.walleij@...aro.org,
	santosh.shilimkar@...com, tony@...mide.com, drake@...lessm.com,
	Marek Szyprowski <m.szyprowski@...sung.com>, loeliger@...il.com
Subject: Re: [PATCH v4 6/7] ARM: EXYNOS: Add support for non-secure L2X0 resume

On 15.09.2014 11:03, Russell King - ARM Linux wrote:
>> diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
>> index 554b350..71bcfbd 100644
>> --- a/arch/arm/mach-exynos/firmware.c
>> +++ b/arch/arm/mach-exynos/firmware.c
>> @@ -102,7 +102,9 @@ static int exynos_suspend(void)
>>  	writel(EXYNOS_SLEEP_MAGIC, sysram_ns_base_addr + EXYNOS_BOOT_FLAG);
>>  	writel(virt_to_phys(exynos_cpu_resume_ns),
>>  		sysram_ns_base_addr + EXYNOS_BOOT_ADDR);
>> -
>> +#ifdef CONFIG_CACHE_L2X0
>> +	l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
>> +#endif
> 
> NAK.  Please look at how arch/arm/mm/l2c-l2x0-resume.S gets the address
> of this structure in assembly code.  The name of this variable is crap
> in any case.  It's not the registers, it's the saved registers.  So even
> more reason to kill this abomination, which incidentally, I've already
> killed off once before in the exynos code.
> 

Right. The way l2c-l2x0-resume.S does this is much better. Somehow I
overlooked it when implementing this.

Best regards,
Tomasz
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