LXR linux/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
  26static 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
  44static inline void *phys_to_virt(unsigned long address)
  45{
  46        return __va(address);
  47}
  48
  49extern 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
  64static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  65{
  66        return __ioremap(offset, size, 0);
  67}
  68
  69extern 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
  82extern unsigned char _inb(unsigned long);
  83extern unsigned short _inw(unsigned long);
  84extern unsigned long _inl(unsigned long);
  85extern unsigned char _inb_p(unsigned long);
  86extern unsigned short _inw_p(unsigned long);
  87extern unsigned long _inl_p(unsigned long);
  88extern void _outb(unsigned char, unsigned long);
  89extern void _outw(unsigned short, unsigned long);
  90extern void _outl(unsigned long, unsigned long);
  91extern void _outb_p(unsigned char, unsigned long);
  92extern void _outw_p(unsigned short, unsigned long);
  93extern void _outl_p(unsigned long, unsigned long);
  94extern void _insb(unsigned int, void *, unsigned long);
  95extern void _insw(unsigned int, void *, unsigned long);
  96extern void _insl(unsigned int, void *, unsigned long);
  97extern void _outsb(unsigned int, const void *, unsigned long);
  98extern void _outsw(unsigned int, const void *, unsigned long);
  99extern void _outsl(unsigned int, const void *, unsigned long);
 100
 101static inline unsigned char _readb(unsigned long addr)
 102{
 103        return *(volatile unsigned char __force *)addr;
 104}
 105
 106static inline unsigned short _readw(unsigned long addr)
 107{
 108        return *(volatile unsigned short __force *)addr;
 109}
 110
 111static inline unsigned long _readl(unsigned long addr)
 112{
 113        return *(volatile unsigned long __force *)addr;
 114}
 115
 116static inline void _writeb(unsigned char b, unsigned long addr)
 117{
 118        *(volatile unsigned char __force *)addr = b;
 119}
 120
 121static inline void _writew(unsigned short w, unsigned long addr)
 122{
 123        *(volatile unsigned short __force *)addr = w;
 124}
 125
 126static 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
 196static inline void
 197memset_io(volatile void __iomem *addr, unsigned char val, int count)
 198{
 199        memset((void __force *) addr, val, count);
 200}
 201
 202static inline void
 203memcpy_fromio(void *dst, volatile void __iomem *src, int count)
 204{
 205        memcpy(dst, (void __force *) src, count);
 206}
 207
 208static inline void
 209memcpy_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 */
 228