[U-Boot] [PATCH v5 1/2] x86: Add 64-bit memory-mapped I/O functions

[Ivan Gorinov]

Add readq() and writeq() definitions for x86.

Please note: in 32-bit code readq/writeq will generate two 32-bit
memory access instructions instead of one atomic 64-bit operation.

Signed-off-by: Ivan Gorinov <ivan.gorinov at intel.com>
---
 arch/x86/include/asm/io.h | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 263dd8f..c7f6fcb 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -58,19 +58,23 @@
  * memory location directly.
  */
 
-#define readb(addr) (*(volatile unsigned char *) (addr))
-#define readw(addr) (*(volatile unsigned short *) (addr))
-#define readl(addr) (*(volatile unsigned int *) (addr))
+#define readb(addr) (*(volatile u8 *) (addr))
+#define readw(addr) (*(volatile u16 *) (addr))
+#define readl(addr) (*(volatile u32 *) (addr))
+#define readq(addr) (*(volatile u64 *) (addr))
 #define __raw_readb readb
 #define __raw_readw readw
 #define __raw_readl readl
+#define __raw_readq readq
 
-#define writeb(b,addr) (*(volatile unsigned char *) (addr) = (b))
-#define writew(b,addr) (*(volatile unsigned short *) (addr) = (b))
-#define writel(b,addr) (*(volatile unsigned int *) (addr) = (b))
+#define writeb(b, addr) (*(volatile u8 *) (addr) = (b))
+#define writew(b, addr) (*(volatile u16 *) (addr) = (b))
+#define writel(b, addr) (*(volatile u32 *) (addr) = (b))
+#define writeq(b, addr) (*(volatile u64 *) (addr) = (b))
 #define __raw_writeb writeb
 #define __raw_writew writew
 #define __raw_writel writel
+#define __raw_writeq writeq
 
 #define memset_io(a,b,c)	memset((a),(b),(c))
 #define memcpy_fromio(a,b,c)	memcpy((a),(b),(c))
-- 
2.7.4