From: Hector Martin <marcan@marcan.st>
Date: Thu, 11 Feb 2021 12:37:48 +0000 (+0900)
Subject: arm64: Implement ioremap_np() to map MMIO as nGnRnE
X-Git-Tag: accepted/tizen/unified/20230118.172025~7406^2~1^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9a63ae85025526a6a5f432cfe41b6df649798aa4;p=platform%2Fkernel%2Flinux-rpi.git

arm64: Implement ioremap_np() to map MMIO as nGnRnE

This is used on Apple ARM platforms, which require most MMIO
(except PCI devices) to be mapped as nGnRnE.

Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
---

diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 5ea8656..953b870 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -169,6 +169,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
 
 #define ioremap(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
 #define ioremap_wc(addr, size)		__ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
+#define ioremap_np(addr, size)		__ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRnE))
 
 /*
  * PCI configuration space mapping function.