tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
2#define _LINUX_IO_64_NONATOMIC_HI_LO_H_
3
4#include <linux/io.h>
5#include <asm-generic/int-ll64.h>
6
7static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
8{
9 const volatile u32 __iomem *p = addr;
10 u32 low, high;
11
12 high = readl(p + 1);
13 low = readl(p);
14
15 return low + ((u64)high << 32);
16}
17
18static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
19{
20 writel(val >> 32, addr + 4);
21 writel(val, addr);
22}
23
24#ifndef readq
25#define readq hi_lo_readq
26#endif
27
28#ifndef writeq
29#define writeq hi_lo_writeq
30#endif
31
32#endif /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */