UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: zynq: Reserve correct amount of non-DMA RAM 

On Zynq, we haven't been reserving the correct amount of DMA-incapable
RAM to keep DMA away from it (per the Zynq TRM Section 4.1, it should be
the first 512k). In older kernels, this was masked by the
memblock_reserve call in arm_memblock_init(). Now, reserve the correct
amount excplicitly rather than relying on swapper_pg_dir, which is an
address and not a size anyway.

Fixes: 46f5b96 ("ARM: zynq: Reserve not DMAable space in front of the
kernel")

Signed-off-by: Kyle Roeschley <kyle.roeschley@ni.com>
Tested-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Kyle Roeschley 2016-10-31 11:26:17 -05:00 committed by Michal Simek
parent 1001354ca3
commit 7a3cc2a7b2
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/mach-zynq/common.c
View File

@ -59,7 +59,7 @@ void __iomem *zynq_scu_base;
static void __init zynq_memory_init(void)
{
if (!__pa(PAGE_OFFSET))
memblock_reserve(__pa(PAGE_OFFSET), __pa(swapper_pg_dir));
memblock_reserve(__pa(PAGE_OFFSET), 0x80000);
}
static struct platform_device zynq_cpuidle_device = {