arch/s390/include/asm/io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  S390 version
   4  *    Copyright IBM Corp. 1999
   5  *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
   6  *
   7  *  Derived from "include/asm-i386/io.h"
   8  */
   9
  10 #ifndef _S390_IO_H
  11 #define _S390_IO_H
  12
  13 #include <linux/kernel.h>
  14 #include <asm/page.h>
  15 #include <asm/pci_io.h>
  16
  17 #define xlate_dev_mem_ptr xlate_dev_mem_ptr
  18 void *xlate_dev_mem_ptr(phys_addr_t phys);
  19 #define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
  20 void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
  21
  22 /*
  23  * Convert a virtual cached pointer to an uncached pointer
  24  */
  25 #define xlate_dev_kmem_ptr(p)   p
  26
  27 #define IO_SPACE_LIMIT 0
  28
  29 #define ioremap_nocache(addr, size)     ioremap(addr, size)
  30 #define ioremap_wc                      ioremap_nocache
  31 #define ioremap_wt                      ioremap_nocache
  32
  33 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
  34 {
  35         return (void __iomem *) offset;
  36 }
  37
  38 static inline void iounmap(volatile void __iomem *addr)
  39 {
  40 }
  41
  42 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
  43 {
  44         return NULL;
  45 }
  46
  47 static inline void ioport_unmap(void __iomem *p)
  48 {
  49 }
  50
  51 #ifdef CONFIG_PCI
  52
  53 /*
  54  * s390 needs a private implementation of pci_iomap since ioremap with its
  55  * offset parameter isn't sufficient. That's because BAR spaces are not
  56  * disjunctive on s390 so we need the bar parameter of pci_iomap to find
  57  * the corresponding device and create the mapping cookie.
  58  */
  59 #define pci_iomap pci_iomap
  60 #define pci_iounmap pci_iounmap
  61 #define pci_iomap_wc pci_iomap
  62 #define pci_iomap_wc_range pci_iomap_range
  63
  64 #define memcpy_fromio(dst, src, count)  zpci_memcpy_fromio(dst, src, count)
  65 #define memcpy_toio(dst, src, count)    zpci_memcpy_toio(dst, src, count)
  66 #define memset_io(dst, val, count)      zpci_memset_io(dst, val, count)
  67
  68 #define __raw_readb     zpci_read_u8
  69 #define __raw_readw     zpci_read_u16
  70 #define __raw_readl     zpci_read_u32
  71 #define __raw_readq     zpci_read_u64
  72 #define __raw_writeb    zpci_write_u8
  73 #define __raw_writew    zpci_write_u16
  74 #define __raw_writel    zpci_write_u32
  75 #define __raw_writeq    zpci_write_u64
  76
  77 #endif /* CONFIG_PCI */
  78
  79 #include <asm-generic/io.h>
  80
  81 #endif