[PATCH RFC 1/4] arm64: io: Introduce IO_SPACE_BASE
From: John Garry <hidden>
Date: 2021-01-15 17:04:41
Also in:
linux-arm-kernel, linux-mips, linux-pci, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Introduce IO_SPACE_BASE, which is the base address of the IO port region. 0x10000 is chosen intentionally to exclude legacy ISA IO port address range. Signed-off-by: John Garry <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 fd172c41df90..2bcf55704bee 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h@@ -148,6 +148,7 @@ static inline u64 __raw_readq(const volatile void __iomem *addr) #define arch_has_dev_port() (1) #define IO_SPACE_LIMIT (PCI_IO_SIZE - 1) #define PCI_IOBASE ((void __iomem *)PCI_IO_START) +#define IO_SPACE_BASE (0x10000) /* * String version of I/O memory access operations.
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2.26.2