Commit 9a63ae85 authored by Hector Martin's avatar Hector Martin
Browse files

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: default avatarMarc Zyngier <maz@kernel.org>
Acked-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarHector Martin <marcan@marcan.st>
parent 08e9b5be

arch/arm64/include/asm/io.h

+1 −0
Original line number Diff line number Diff line
@@ -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.