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Subject[PATCH RFC 1/4] arm64: io: Introduce IO_SPACE_BASE
Date
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 <john.garry@huawei.com>
---
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.
--
2.26.2
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