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  */
  20 static 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
  33 static inline void * phys_to_virt(unsigned long address)
  34 {
  35         return (void *) address;
  36 }
  37
  38 void *xlate_dev_mem_ptr(unsigned long phys);
  39 void unxlate_dev_mem_ptr(unsigned long phys, void *addr);
  40
  41 /*
  42  * Convert a virtual cached pointer to an uncached pointer
  43  */
  44 #define xlate_dev_kmem_ptr(p)   p
  45
  46 #define IO_SPACE_LIMIT 0
  47
  48 #ifdef CONFIG_PCI
  49
  50 #define ioremap_nocache(addr, size)     ioremap(addr, size)
  51 #define ioremap_wc                      ioremap_nocache
  52
  53 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  54 {
  55         return (void __iomem *) offset;
  56 }
  57
  58 static inline void iounmap(volatile void __iomem *addr)
  59 {
  60 }
  61
  62 /*
  63  * s390 needs a private implementation of pci_iomap since ioremap with its
  64  * offset parameter isn't sufficient. That's because BAR spaces are not
  65  * disjunctive on s390 so we need the bar parameter of pci_iomap to find
  66  * the corresponding device and create the mapping cookie.
  67  */
  68 #define pci_iomap pci_iomap
  69 #define pci_iounmap pci_iounmap
  70
  71 #define memcpy_fromio(dst, src, count)  zpci_memcpy_fromio(dst, src, count)
  72 #define memcpy_toio(dst, src, count)    zpci_memcpy_toio(dst, src, count)
  73 #define memset_io(dst, val, count)      zpci_memset_io(dst, val, count)
  74
  75 #define __raw_readb     zpci_read_u8
  76 #define __raw_readw     zpci_read_u16
  77 #define __raw_readl     zpci_read_u32
  78 #define __raw_readq     zpci_read_u64
  79 #define __raw_writeb    zpci_write_u8
  80 #define __raw_writew    zpci_write_u16
  81 #define __raw_writel    zpci_write_u32
  82 #define __raw_writeq    zpci_write_u64
  83
  84 #define readb_relaxed   readb
  85 #define readw_relaxed   readw
  86 #define readl_relaxed   readl
  87 #define readq_relaxed   readq
  88
  89 #endif /* CONFIG_PCI */
  90
  91 #include <asm-generic/io.h>
  92
  93 #endif