include/linux/io-64-nonatomic-hi-lo.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_IO_64_NONATOMIC_HI_LO_H_
   3 #define _LINUX_IO_64_NONATOMIC_HI_LO_H_
   4
   5 #include <linux/io.h>
   6 #include <asm-generic/int-ll64.h>
   7
   8 static inline __u64 hi_lo_readq(const volatile void __iomem *addr)
   9 {
  10         const volatile u32 __iomem *p = addr;
  11         u32 low, high;
  12
  13         high = readl(p + 1);
  14         low = readl(p);
  15
  16         return low + ((u64)high << 32);
  17 }
  18
  19 static inline void hi_lo_writeq(__u64 val, volatile void __iomem *addr)
  20 {
  21         writel(val >> 32, addr + 4);
  22         writel(val, addr);
  23 }
  24
  25 static inline __u64 hi_lo_readq_relaxed(const volatile void __iomem *addr)
  26 {
  27         const volatile u32 __iomem *p = addr;
  28         u32 low, high;
  29
  30         high = readl_relaxed(p + 1);
  31         low = readl_relaxed(p);
  32
  33         return low + ((u64)high << 32);
  34 }
  35
  36 static inline void hi_lo_writeq_relaxed(__u64 val, volatile void __iomem *addr)
  37 {
  38         writel_relaxed(val >> 32, addr + 4);
  39         writel_relaxed(val, addr);
  40 }
  41
  42 #ifndef readq
  43 #define readq hi_lo_readq
  44 #endif
  45
  46 #ifndef writeq
  47 #define writeq hi_lo_writeq
  48 #endif
  49
  50 #ifndef readq_relaxed
  51 #define readq_relaxed hi_lo_readq_relaxed
  52 #endif
  53
  54 #ifndef writeq_relaxed
  55 #define writeq_relaxed hi_lo_writeq_relaxed
  56 #endif
  57
  58 #ifndef ioread64_hi_lo
  59 #define ioread64_hi_lo ioread64_hi_lo
  60 static inline u64 ioread64_hi_lo(void __iomem *addr)
  61 {
  62         u32 low, high;
  63
  64         high = ioread32(addr + sizeof(u32));
  65         low = ioread32(addr);
  66
  67         return low + ((u64)high << 32);
  68 }
  69 #endif
  70
  71 #ifndef iowrite64_hi_lo
  72 #define iowrite64_hi_lo iowrite64_hi_lo
  73 static inline void iowrite64_hi_lo(u64 val, void __iomem *addr)
  74 {
  75         iowrite32(val >> 32, addr + sizeof(u32));
  76         iowrite32(val, addr);
  77 }
  78 #endif
  79
  80 #ifndef ioread64be_hi_lo
  81 #define ioread64be_hi_lo ioread64be_hi_lo
  82 static inline u64 ioread64be_hi_lo(void __iomem *addr)
  83 {
  84         u32 low, high;
  85
  86         high = ioread32be(addr);
  87         low = ioread32be(addr + sizeof(u32));
  88
  89         return low + ((u64)high << 32);
  90 }
  91 #endif
  92
  93 #ifndef iowrite64be_hi_lo
  94 #define iowrite64be_hi_lo iowrite64be_hi_lo
  95 static inline void iowrite64be_hi_lo(u64 val, void __iomem *addr)
  96 {
  97         iowrite32be(val >> 32, addr);
  98         iowrite32be(val, addr + sizeof(u32));
  99 }
 100 #endif
 101
 102 #ifndef ioread64
 103 #define ioread64_is_nonatomic
 104 #define ioread64 ioread64_hi_lo
 105 #endif
 106
 107 #ifndef iowrite64
 108 #define iowrite64_is_nonatomic
 109 #define iowrite64 iowrite64_hi_lo
 110 #endif
 111
 112 #ifndef ioread64be
 113 #define ioread64be_is_nonatomic
 114 #define ioread64be ioread64be_hi_lo
 115 #endif
 116
 117 #ifndef iowrite64be
 118 #define iowrite64be_is_nonatomic
 119 #define iowrite64be iowrite64be_hi_lo
 120 #endif
 121
 122 #endif  /* _LINUX_IO_64_NONATOMIC_HI_LO_H_ */