1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_IO_64_NONATOMIC_LO_HI_H_ 3#define _LINUX_IO_64_NONATOMIC_LO_HI_H_ 4 5#include <linux/io.h> 6#include <asm-generic/int-ll64.h> 7 8static inline __u64 lo_hi_readq(const volatile void __iomem *addr) 9{ 10 const volatile u32 __iomem *p = addr; 11 u32 low, high; 12 13 low = readl(p); 14 high = readl(p + 1); 15 16 return low + ((u64)high << 32); 17} 18 19static inline void lo_hi_writeq(__u64 val, volatile void __iomem *addr) 20{ 21 writel(val, addr); 22 writel(val >> 32, addr + 4); 23} 24 25static inline __u64 lo_hi_readq_relaxed(const volatile void __iomem *addr) 26{ 27 const volatile u32 __iomem *p = addr; 28 u32 low, high; 29 30 low = readl_relaxed(p); 31 high = readl_relaxed(p + 1); 32 33 return low + ((u64)high << 32); 34} 35 36static inline void lo_hi_writeq_relaxed(__u64 val, volatile void __iomem *addr) 37{ 38 writel_relaxed(val, addr); 39 writel_relaxed(val >> 32, addr + 4); 40} 41 42#ifndef readq 43#define readq lo_hi_readq 44#endif 45 46#ifndef writeq 47#define writeq lo_hi_writeq 48#endif 49 50#ifndef readq_relaxed 51#define readq_relaxed lo_hi_readq_relaxed 52#endif 53 54#ifndef writeq_relaxed 55#define writeq_relaxed lo_hi_writeq_relaxed 56#endif 57 58#endif /* _LINUX_IO_64_NONATOMIC_LO_HI_H_ */ 59