[PATCH RFC 1/4] arm64: io: Introduce IO_SPACE_BASE

[John Garry]

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@xxxxxxxxxx>
---
 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