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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /include/asm-generic/io-64-nonatomic-hi-lo.h
Initial import
Diffstat (limited to 'include/asm-generic/io-64-nonatomic-hi-lo.h')
-rw-r--r--include/asm-generic/io-64-nonatomic-hi-lo.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-generic/io-64-nonatomic-hi-lo.h b/include/asm-generic/io-64-nonatomic-hi-lo.h
new file mode 100644
index 000000000..2e29d13fc
--- /dev/null
+++ b/include/asm-generic/io-64-nonatomic-hi-lo.h
@@ -0,0 +1,32 @@
+#ifndef _ASM_IO_64_NONATOMIC_HI_LO_H_
+#define _ASM_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 /* _ASM_IO_64_NONATOMIC_HI_LO_H_ */