| Christoph Hellwig | 2f8e2c8 | 2015-08-28 09:27:14 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_ |
| 2 | #define _LINUX_IO_64_NONATOMIC_LO_HI_H_ |
| Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 3 | |
| 4 | #include <linux/io.h> |
| 5 | #include <asm-generic/int-ll64.h> |
| 6 | |
| Jason Baron | 3a04417 | 2014-07-04 13:27:04 +0200 | [diff] [blame] | 7 | static inline __u64 lo_hi_readq(const volatile void __iomem *addr) |
| Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 8 | { |
| 9 | const volatile u32 __iomem *p = addr; |
| 10 | u32 low, high; |
| 11 | |
| 12 | low = readl(p); |
| 13 | high = readl(p + 1); |
| 14 | |
| 15 | return low + ((u64)high << 32); |
| 16 | } |
| Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 17 | |
| Jason Baron | 3a04417 | 2014-07-04 13:27:04 +0200 | [diff] [blame] | 18 | static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr) |
| Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 19 | { |
| 20 | writel(val, addr); |
| 21 | writel(val >> 32, addr + 4); |
| 22 | } |
| Jason Baron | 3a04417 | 2014-07-04 13:27:04 +0200 | [diff] [blame] | 23 | |
| 24 | #ifndef readq |
| 25 | #define readq lo_hi_readq |
| 26 | #endif |
| 27 | |
| 28 | #ifndef writeq |
| 29 | #define writeq lo_hi_writeq |
| Hitoshi Mitake | 797a796 | 2012-02-07 11:45:33 +0900 | [diff] [blame] | 30 | #endif |
| 31 | |
| Christoph Hellwig | 2f8e2c8 | 2015-08-28 09:27:14 +0200 | [diff] [blame] | 32 | #endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */ |