[PATCH v2 11/25] arm64: Implement ioremap_np() to map MMIO as nGnRnE
From: Hector Martin <hidden>
Date: 2021-02-15 12:22:56
Also in:
linux-devicetree, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
This is used on Apple ARM platforms, which require most MMIO (except PCI devices) to be mapped as nGnRnE. Signed-off-by: Hector Martin <redacted> --- arch/arm64/include/asm/io.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 5ea8656a2030..953b8703af60 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.
--
2.30.0
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