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 5ea8656a2030bff30e447041029f13106b4c44c3..953b8703af60712d2d2a2842bf7723f03912e5aa 100644 (file)
--- 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.