arch/m32r/include/asm/io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_M32R_IO_H
   3 #define _ASM_M32R_IO_H
   4
   5 #include <linux/string.h>
   6 #include <linux/compiler.h>
   7 #include <asm/page.h>  /* __va */
   8
   9 #ifdef __KERNEL__
  10
  11 #define IO_SPACE_LIMIT  0xFFFFFFFF
  12
  13 /**
  14  *      virt_to_phys    -       map virtual addresses to physical
  15  *      @address: address to remap
  16  *
  17  *      The returned physical address is the physical (CPU) mapping for
  18  *      the memory address given. It is only valid to use this function on
  19  *      addresses directly mapped or allocated via kmalloc.
  20  *
  21  *      This function does not give bus mappings for DMA transfers. In
  22  *      almost all conceivable cases a device driver should not be using
  23  *      this function
  24  */
  25
  26 static inline unsigned long virt_to_phys(volatile void * address)
  27 {
  28         return __pa(address);
  29 }
  30
  31 /**
  32  *      phys_to_virt    -       map physical address to virtual
  33  *      @address: address to remap
  34  *
  35  *      The returned virtual address is a current CPU mapping for
  36  *      the memory address given. It is only valid to use this function on
  37  *      addresses that have a kernel mapping
  38  *
  39  *      This function does not handle bus mappings for DMA transfers. In
  40  *      almost all conceivable cases a device driver should not be using
  41  *      this function
  42  */
  43
  44 static inline void *phys_to_virt(unsigned long address)
  45 {
  46         return __va(address);
  47 }
  48
  49 extern void __iomem *
  50 __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
  51
  52 /**
  53  *      ioremap         -       map bus memory into CPU space
  54  *      @offset:        bus address of the memory
  55  *      @size:          size of the resource to map
  56  *
  57  *      ioremap performs a platform specific sequence of operations to
  58  *      make bus memory CPU accessible via the readb/readw/readl/writeb/
  59  *      writew/writel functions and the other mmio helpers. The returned
  60  *      address is not guaranteed to be usable directly as a virtual
  61  *      address.
  62  */
  63
  64 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  65 {
  66         return __ioremap(offset, size, 0);
  67 }
  68
  69 extern void iounmap(volatile void __iomem *addr);
  70 #define ioremap_nocache(off,size) ioremap(off,size)
  71 #define ioremap_wc ioremap_nocache
  72 #define ioremap_wt ioremap_nocache
  73 #define ioremap_uc ioremap_nocache
  74
  75 /*
  76  * IO bus memory addresses are also 1:1 with the physical address
  77  */
  78 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
  79 #define page_to_bus     page_to_phys
  80 #define virt_to_bus     virt_to_phys
  81
  82 extern unsigned char _inb(unsigned long);
  83 extern unsigned short _inw(unsigned long);
  84 extern unsigned long _inl(unsigned long);
  85 extern unsigned char _inb_p(unsigned long);
  86 extern unsigned short _inw_p(unsigned long);
  87 extern unsigned long _inl_p(unsigned long);
  88 extern void _outb(unsigned char, unsigned long);
  89 extern void _outw(unsigned short, unsigned long);
  90 extern void _outl(unsigned long, unsigned long);
  91 extern void _outb_p(unsigned char, unsigned long);
  92 extern void _outw_p(unsigned short, unsigned long);
  93 extern void _outl_p(unsigned long, unsigned long);
  94 extern void _insb(unsigned int, void *, unsigned long);
  95 extern void _insw(unsigned int, void *, unsigned long);
  96 extern void _insl(unsigned int, void *, unsigned long);
  97 extern void _outsb(unsigned int, const void *, unsigned long);
  98 extern void _outsw(unsigned int, const void *, unsigned long);
  99 extern void _outsl(unsigned int, const void *, unsigned long);
 100
 101 static inline unsigned char _readb(unsigned long addr)
 102 {
 103         return *(volatile unsigned char __force *)addr;
 104 }
 105
 106 static inline unsigned short _readw(unsigned long addr)
 107 {
 108         return *(volatile unsigned short __force *)addr;
 109 }
 110
 111 static inline unsigned long _readl(unsigned long addr)
 112 {
 113         return *(volatile unsigned long __force *)addr;
 114 }
 115
 116 static inline void _writeb(unsigned char b, unsigned long addr)
 117 {
 118         *(volatile unsigned char __force *)addr = b;
 119 }
 120
 121 static inline void _writew(unsigned short w, unsigned long addr)
 122 {
 123         *(volatile unsigned short __force *)addr = w;
 124 }
 125
 126 static inline void _writel(unsigned long l, unsigned long addr)
 127 {
 128         *(volatile unsigned long __force *)addr = l;
 129 }
 130
 131 #define inb     _inb
 132 #define inw     _inw
 133 #define inl     _inl
 134 #define outb    _outb
 135 #define outw    _outw
 136 #define outl    _outl
 137
 138 #define inb_p   _inb_p
 139 #define inw_p   _inw_p
 140 #define inl_p   _inl_p
 141 #define outb_p  _outb_p
 142 #define outw_p  _outw_p
 143 #define outl_p  _outl_p
 144
 145 #define insb    _insb
 146 #define insw    _insw
 147 #define insl    _insl
 148 #define outsb   _outsb
 149 #define outsw   _outsw
 150 #define outsl   _outsl
 151
 152 #define readb(addr)   _readb((unsigned long)(addr))
 153 #define readw(addr)   _readw((unsigned long)(addr))
 154 #define readl(addr)   _readl((unsigned long)(addr))
 155 #define __raw_readb readb
 156 #define __raw_readw readw
 157 #define __raw_readl readl
 158 #define readb_relaxed readb
 159 #define readw_relaxed readw
 160 #define readl_relaxed readl
 161
 162 #define writeb(val, addr)  _writeb((val), (unsigned long)(addr))
 163 #define writew(val, addr)  _writew((val), (unsigned long)(addr))
 164 #define writel(val, addr)  _writel((val), (unsigned long)(addr))
 165 #define __raw_writeb writeb
 166 #define __raw_writew writew
 167 #define __raw_writel writel
 168 #define writeb_relaxed writeb
 169 #define writew_relaxed writew
 170 #define writel_relaxed writel
 171
 172 #define ioread8 readb
 173 #define ioread16 readw
 174 #define ioread32 readl
 175 #define iowrite8 writeb
 176 #define iowrite16 writew
 177 #define iowrite32 writel
 178
 179 #define ioread8_rep(p, dst, count) insb((unsigned long)(p), (dst), (count))
 180 #define ioread16_rep(p, dst, count) insw((unsigned long)(p), (dst), (count))
 181 #define ioread32_rep(p, dst, count) insl((unsigned long)(p), (dst), (count))
 182
 183 #define iowrite8_rep(p, src, count) outsb((unsigned long)(p), (src), (count))
 184 #define iowrite16_rep(p, src, count) outsw((unsigned long)(p), (src), (count))
 185 #define iowrite32_rep(p, src, count) outsl((unsigned long)(p), (src), (count))
 186
 187 #define ioread16be(addr)        be16_to_cpu(readw(addr))
 188 #define ioread32be(addr)        be32_to_cpu(readl(addr))
 189 #define iowrite16be(v, addr)    writew(cpu_to_be16(v), (addr))
 190 #define iowrite32be(v, addr)    writel(cpu_to_be32(v), (addr))
 191
 192 #define mmiowb()
 193
 194 #define flush_write_buffers() do { } while (0)  /* M32R_FIXME */
 195
 196 static inline void
 197 memset_io(volatile void __iomem *addr, unsigned char val, int count)
 198 {
 199         memset((void __force *) addr, val, count);
 200 }
 201
 202 static inline void
 203 memcpy_fromio(void *dst, volatile void __iomem *src, int count)
 204 {
 205         memcpy(dst, (void __force *) src, count);
 206 }
 207
 208 static inline void
 209 memcpy_toio(volatile void __iomem *dst, const void *src, int count)
 210 {
 211         memcpy((void __force *) dst, src, count);
 212 }
 213
 214 /*
 215  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 216  * access
 217  */
 218 #define xlate_dev_mem_ptr(p)    __va(p)
 219
 220 /*
 221  * Convert a virtual cached pointer to an uncached pointer
 222  */
 223 #define xlate_dev_kmem_ptr(p)   p
 224
 225 #endif  /* __KERNEL__ */
 226
 227 #endif  /* _ASM_M32R_IO_H */