[PATCH v4 01/21] arm/acpi: Emulate io ports for arm

[Shannon Zhao <zhaoshenglong@huawei.com>]

From: Shannon Zhao <shannon.zhao@linaro.org>

Add macros to emulate x86 style ports for arm. This avoids modification in
common code for acpi. Here just print a warning on ARM.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
V4: print warning
---
 xen/include/asm-arm/arm64/io.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/xen/include/asm-arm/arm64/io.h b/xen/include/asm-arm/arm64/io.h
index 37abc47..ec5815d 100644
--- a/xen/include/asm-arm/arm64/io.h
+++ b/xen/include/asm-arm/arm64/io.h
@@ -20,6 +20,7 @@
 #ifndef _ARM_ARM64_IO_H
 #define _ARM_ARM64_IO_H
 
+#include <asm/system.h>
 #include <asm/byteorder.h>
 
 /*
@@ -109,4 +110,21 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
 #define writel(v,c)             ({ __iowmb(); writel_relaxed((v),(c)); })
 #define writeq(v,c)             ({ __iowmb(); writeq_relaxed((v),(c)); })
 
+/*
+ * Emulate x86 io ports for ARM.
+ */
+static inline void __iomem * __armio(u64 addr)
+{
+    printk(XENLOG_G_WARNING "Can't access IO %lx\n", addr);
+    return (void __iomem *)addr;
+}
+
+#define inb(c) ( readb( __armio(c) ) )
+#define inw(c) ( readw( __armio(c) ) )
+#define inl(c) ( readl( __armio(c) ) )
+
+#define outb(v, c) ( writeb(v, __armio(c) ) )
+#define outw(v, c) ( writew(v, __armio(c) ) )
+#define outl(v, c) ( writel(v, __armio(c) ) )
+
 #endif /* _ARM_ARM64_IO_H */
-- 
2.0.4