LXR linux/arch/s390/include/asm/io.h

   1/*
   2 *  S390 version
   3 *    Copyright IBM Corp. 1999
   4 *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   5 *
   6 *  Derived from "include/asm-i386/io.h"
   7 */
   8
   9#ifndef _S390_IO_H
  10#define _S390_IO_H
  11
  12#include <linux/kernel.h>
  13#include <asm/page.h>
  14#include <asm/pci_io.h>
  15
  16/*
  17 * Change virtual addresses to physical addresses and vv.
  18 * These are pretty trivial
  19 */
  20static inline unsigned long virt_to_phys(volatile void * address)
  21{
  22        unsigned long real_address;
  23        asm volatile(
  24                 "      lra     %0,0(%1)\n"
  25                 "      jz      0f\n"
  26                 "      la      %0,0\n"
  27                 "0:"
  28                 : "=a" (real_address) : "a" (address) : "cc");
  29        return real_address;
  30}
  31#define virt_to_phys virt_to_phys
  32
  33static inline void * phys_to_virt(unsigned long address)
  34{
  35        return (void *) address;
  36}
  37
  38void *xlate_dev_mem_ptr(unsigned long phys);
  39#define xlate_dev_mem_ptr xlate_dev_mem_ptr
  40void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
  41
  42/*
  43 * Convert a virtual cached pointer to an uncached pointer
  44 */
  45#define xlate_dev_kmem_ptr(p)   p
  46
  47#define IO_SPACE_LIMIT 0
  48
  49#ifdef CONFIG_PCI
  50
  51#define ioremap_nocache(addr, size)     ioremap(addr, size)
  52#define ioremap_wc                      ioremap_nocache
  53
  54static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  55{
  56        return (void __iomem *) offset;
  57}
  58
  59static inline void iounmap(volatile void __iomem *addr)
  60{
  61}
  62
  63/*
  64 * s390 needs a private implementation of pci_iomap since ioremap with its
  65 * offset parameter isn't sufficient. That's because BAR spaces are not
  66 * disjunctive on s390 so we need the bar parameter of pci_iomap to find
  67 * the corresponding device and create the mapping cookie.
  68 */
  69#define pci_iomap pci_iomap
  70#define pci_iounmap pci_iounmap
  71
  72#define memcpy_fromio(dst, src, count)  zpci_memcpy_fromio(dst, src, count)
  73#define memcpy_toio(dst, src, count)    zpci_memcpy_toio(dst, src, count)
  74#define memset_io(dst, val, count)      zpci_memset_io(dst, val, count)
  75
  76#define __raw_readb     zpci_read_u8
  77#define __raw_readw     zpci_read_u16
  78#define __raw_readl     zpci_read_u32
  79#define __raw_readq     zpci_read_u64
  80#define __raw_writeb    zpci_write_u8
  81#define __raw_writew    zpci_write_u16
  82#define __raw_writel    zpci_write_u32
  83#define __raw_writeq    zpci_write_u64
  84
  85#define readb_relaxed   readb
  86#define readw_relaxed   readw
  87#define readl_relaxed   readl
  88#define readq_relaxed   readq
  89
  90#endif /* CONFIG_PCI */
  91
  92#include <asm-generic/io.h>
  93
  94#endif
  95