openwrtv3/target/linux/layerscape/patches-4.4/3009-armv8-aarch32-Allow-RAM-to-be-mapped-for-LayerScape-.patch
Yutang Jiang c6c731fe31 layerscape: add 64b/32b target for ls1043ardb device
Add support for NXP layerscape ls1043ardb 64b/32b Dev board.

LS1043a is an SoC with 4x64-bit up to 1.6 GHz ARMv8 A53 cores.
ls1043ardb support features as: 2GB DDR4, 128MB NOR/512MB NAND, USB3.0, eSDHC,
I2C, GPIO, PCIe/Mini-PCIe, 6x1G/1x10G network port, etc.

64b/32b ls1043ardb target is using 4.4 kernel, and rcw/u-boot/fman images from
NXP QorIQ SDK release.

All of 4.4 kernel patches porting from SDK release or upstream.

QorIQ SDK ISOs can be downloaded from this location:
http://www.nxp.com/products/software-and-tools/run-time-software/linux-sdk/linux-sdk-for-qoriq-processors:SDKLINUX

Signed-off-by: Yutang Jiang <yutang.jiang@nxp.com>
2016-10-31 17:00:10 +01:00

31 lines
1 KiB
Diff

From ef25bf644b7de83849a2f804c84bb54cd2f1255f Mon Sep 17 00:00:00 2001
From: Alison Wang <b18965@freescale.com>
Date: Mon, 11 Apr 2016 17:25:40 +0800
Subject: [PATCH 09/70] armv8: aarch32: Allow RAM to be mapped for LayerScape
SoC
This patch is based on Kernel v4.1.8. As in v4.1.8, memremap() is not
introduced and the WARN() check is not relaxed to allow MT_MEMORY_RW
mappings of pfn_valid() pages, this patch is needed as a workaround for
spin-table address which locates in RAM to be mapped.
For the latest kernel in upstream, this patch is not needed anymore.
Signed-off-by: Alison Wang <alison.wang@nxp.com>
---
arch/arm/mm/ioremap.c | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -298,8 +298,10 @@ static void __iomem * __arm_ioremap_pfn_
/*
* Don't allow RAM to be mapped - this causes problems with ARMv6+
*/
+#ifndef CONFIG_ARCH_LAYERSCAPE
if (WARN_ON(pfn_valid(pfn)))
return NULL;
+#endif
area = get_vm_area_caller(size, VM_IOREMAP, caller);
if (!area)