These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / linux / io-64-nonatomic-hi-lo.h

diff --git a/kernel/include/linux/io-64-nonatomic-hi-lo.h b/kernel/include/linux/io-64-nonatomic-hi-lo.h
new file mode 100644 (file)
index 0000000..11d7e84
--- /dev/null
+++ b/kernel/include/linux/io-64-nonatomic-hi-lo.h
@@ -0,0 +1,32 @@
+#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
+#define _LINUX_IO_64_NONATOMIC_HI_LO_H_
+
+#include <linux/io.h>
+#include <asm-generic/int-ll64.h>
+
+static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
+{
+       const volatile u32 __iomem *p = addr;
+       u32 low, high;
+
+       high = readl(p + 1);
+       low = readl(p);
+
+       return low + ((u64)high << 32);
+}
+
+static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
+{
+       writel(val >> 32, addr + 4);
+       writel(val, addr);
+}
+
+#ifndef readq
+#define readq hi_lo_readq
+#endif
+
+#ifndef writeq
+#define writeq hi_lo_writeq
+#endif
+
+#endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */