arch/arc/include/asm/io.h

   1 /*
   2  * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #ifndef __ASM_ARC_IO_H
   8 #define __ASM_ARC_IO_H
   9
  10 #include <linux/types.h>
  11 #include <asm/byteorder.h>
  12
  13 static inline void sync(void)
  14 {
  15         /* Not yet implemented */
  16 }
  17
  18 static inline u8 __raw_readb(const volatile void __iomem *addr)
  19 {
  20         u8 b;
  21
  22         __asm__ __volatile__("ldb%U1    %0, %1\n"
  23                              : "=r" (b)
  24                              : "m" (*(volatile u8 __force *)addr)
  25                              : "memory");
  26         return b;
  27 }
  28
  29 static inline u16 __raw_readw(const volatile void __iomem *addr)
  30 {
  31         u16 s;
  32
  33         __asm__ __volatile__("ldw%U1    %0, %1\n"
  34                              : "=r" (s)
  35                              : "m" (*(volatile u16 __force *)addr)
  36                              : "memory");
  37         return s;
  38 }
  39
  40 static inline u32 __raw_readl(const volatile void __iomem *addr)
  41 {
  42         u32 w;
  43
  44         __asm__ __volatile__("ld%U1     %0, %1\n"
  45                              : "=r" (w)
  46                              : "m" (*(volatile u32 __force *)addr)
  47                              : "memory");
  48         return w;
  49 }
  50
  51 #define readb __raw_readb
  52
  53 static inline u16 readw(const volatile void __iomem *addr)
  54 {
  55         return __le16_to_cpu(__raw_readw(addr));
  56 }
  57
  58 static inline u32 readl(const volatile void __iomem *addr)
  59 {
  60         return __le32_to_cpu(__raw_readl(addr));
  61 }
  62
  63 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
  64 {
  65         __asm__ __volatile__("stb%U1    %0, %1\n"
  66                              :
  67                              : "r" (b), "m" (*(volatile u8 __force *)addr)
  68                              : "memory");
  69 }
  70
  71 static inline void __raw_writew(u16 s, volatile void __iomem *addr)
  72 {
  73         __asm__ __volatile__("stw%U1    %0, %1\n"
  74                              :
  75                              : "r" (s), "m" (*(volatile u16 __force *)addr)
  76                              : "memory");
  77 }
  78
  79 static inline void __raw_writel(u32 w, volatile void __iomem *addr)
  80 {
  81         __asm__ __volatile__("st%U1     %0, %1\n"
  82                              :
  83                              : "r" (w), "m" (*(volatile u32 __force *)addr)
  84                              : "memory");
  85 }
  86
  87 #define writeb __raw_writeb
  88 #define writew(b, addr) __raw_writew(__cpu_to_le16(b), addr)
  89 #define writel(b, addr) __raw_writel(__cpu_to_le32(b), addr)
  90
  91 static inline int __raw_readsb(unsigned int addr, void *data, int bytelen)
  92 {
  93         __asm__ __volatile__ ("1:ld.di  r8, [r0]\n"
  94                               "sub.f    r2, r2, 1\n"
  95                               "bnz.d    1b\n"
  96                               "stb.ab   r8, [r1, 1]\n"
  97                               :
  98                               : "r" (addr), "r" (data), "r" (bytelen)
  99                               : "r8");
 100         return bytelen;
 101 }
 102
 103 static inline int __raw_readsw(unsigned int addr, void *data, int wordlen)
 104 {
 105         __asm__ __volatile__ ("1:ld.di  r8, [r0]\n"
 106                               "sub.f    r2, r2, 1\n"
 107                               "bnz.d    1b\n"
 108                               "stw.ab   r8, [r1, 2]\n"
 109                               :
 110                               : "r" (addr), "r" (data), "r" (wordlen)
 111                               : "r8");
 112         return wordlen;
 113 }
 114
 115 static inline int __raw_readsl(unsigned int addr, void *data, int longlen)
 116 {
 117         __asm__ __volatile__ ("1:ld.di  r8, [r0]\n"
 118                               "sub.f    r2, r2, 1\n"
 119                               "bnz.d    1b\n"
 120                               "st.ab    r8, [r1, 4]\n"
 121                               :
 122                               : "r" (addr), "r" (data), "r" (longlen)
 123                               : "r8");
 124         return longlen;
 125 }
 126
 127 static inline int __raw_writesb(unsigned int addr, void *data, int bytelen)
 128 {
 129         __asm__ __volatile__ ("1:ldb.ab r8, [r1, 1]\n"
 130                               "sub.f    r2, r2, 1\n"
 131                               "bnz.d    1b\n"
 132                               "st.di    r8, [r0, 0]\n"
 133                               :
 134                               : "r" (addr), "r" (data), "r" (bytelen)
 135                               : "r8");
 136         return bytelen;
 137 }
 138
 139 static inline int __raw_writesw(unsigned int addr, void *data, int wordlen)
 140 {
 141         __asm__ __volatile__ ("1:ldw.ab r8, [r1, 2]\n"
 142                               "sub.f    r2, r2, 1\n"
 143                               "bnz.d    1b\n"
 144                               "st.ab.di r8, [r0, 0]\n"
 145                               :
 146                               : "r" (addr), "r" (data), "r" (wordlen)
 147                               : "r8");
 148         return wordlen;
 149 }
 150
 151 static inline int __raw_writesl(unsigned int addr, void *data, int longlen)
 152 {
 153         __asm__ __volatile__ ("1:ld.ab  r8, [r1, 4]\n"
 154                               "sub.f    r2, r2, 1\n"
 155                               "bnz.d    1b\n"
 156                               "st.ab.di r8, [r0, 0]\n"
 157                               :
 158                               : "r" (addr), "r" (data), "r" (longlen)
 159                               : "r8");
 160         return longlen;
 161 }
 162
 163 #define out_arch(type, endian, a, v)    __raw_write##type(cpu_to_##endian(v), a)
 164 #define in_arch(type, endian, a)        endian##_to_cpu(__raw_read##type(a))
 165
 166 #define out_le32(a, v)  out_arch(l, le32, a, v)
 167 #define out_le16(a, v)  out_arch(w, le16, a, v)
 168
 169 #define in_le32(a)      in_arch(l, le32, a)
 170 #define in_le16(a)      in_arch(w, le16, a)
 171
 172 #define out_be32(a, v)  out_arch(l, be32, a, v)
 173 #define out_be16(a, v)  out_arch(w, be16, a, v)
 174
 175 #define in_be32(a)      in_arch(l, be32, a)
 176 #define in_be16(a)      in_arch(w, be16, a)
 177
 178 #define out_8(a, v)     __raw_writeb(v, a)
 179 #define in_8(a)         __raw_readb(a)
 180
 181 /*
 182  * Clear and set bits in one shot. These macros can be used to clear and
 183  * set multiple bits in a register using a single call. These macros can
 184  * also be used to set a multiple-bit bit pattern using a mask, by
 185  * specifying the mask in the 'clear' parameter and the new bit pattern
 186  * in the 'set' parameter.
 187  */
 188
 189 #define clrbits(type, addr, clear) \
 190         out_##type((addr), in_##type(addr) & ~(clear))
 191
 192 #define setbits(type, addr, set) \
 193         out_##type((addr), in_##type(addr) | (set))
 194
 195 #define clrsetbits(type, addr, clear, set) \
 196         out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
 197
 198 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
 199 #define setbits_be32(addr, set) setbits(be32, addr, set)
 200 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
 201
 202 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
 203 #define setbits_le32(addr, set) setbits(le32, addr, set)
 204 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
 205
 206 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
 207 #define setbits_be16(addr, set) setbits(be16, addr, set)
 208 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
 209
 210 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
 211 #define setbits_le16(addr, set) setbits(le16, addr, set)
 212 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
 213
 214 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
 215 #define setbits_8(addr, set) setbits(8, addr, set)
 216 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 217
 218 #endif  /* __ASM_ARC_IO_H */