Subject: [Q] block / zynq: DMA bouncing

From: [email-masked] (Michal Simek)
Date: Tue, 28 Jan 2014 14:54:32 +0100

On 01/28/2014 02:48 PM, Russell King - ARM Linux wrote:
> On Tue, Jan 28, 2014 at 02:28:28PM +0100, Guennadi Liakhovetski wrote:
>> +static void __init zynq_memory_init(void)
>> +{
>> +	/*
>> +	 * Reserve the 0-0x4000 addresses (before page tables and kernel)
>> +	 * which can't be used for DMA
>> +	 */
>> +	if (!__pa(PAGE_OFFSET))
>> +		memblock_reserve(0, 0x4000);
> 
> Or maybe this:
> 
> 	memblock_reserve(__pa(PAGE_OFFSET), __pa(swapper_pg_dir));
> 
> since that's actually what you mean here.

yep with that if too.

I will prepare that patch and will send it out.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform

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