root/arch/arm/mm/iomap.c

DEFINITIONS

1. ioport_map
2. ioport_unmap
3. pci_iounmap

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/arm/mm/iomap.c
   4  *
   5  * Map IO port and PCI memory spaces so that {read,write}[bwl] can
   6  * be used to access this memory.
   7  */
   8 #include <linux/module.h>
   9 #include <linux/pci.h>
  10 #include <linux/ioport.h>
  11 #include <linux/io.h>
  12 
  13 unsigned long vga_base;
  14 EXPORT_SYMBOL(vga_base);
  15 
  16 #ifdef __io
  17 void __iomem *ioport_map(unsigned long port, unsigned int nr)
  18 {
  19         return __io(port);
  20 }
  21 EXPORT_SYMBOL(ioport_map);
  22 
  23 void ioport_unmap(void __iomem *addr)
  24 {
  25 }
  26 EXPORT_SYMBOL(ioport_unmap);
  27 #endif
  28 
  29 #ifdef CONFIG_PCI
  30 unsigned long pcibios_min_io = 0x1000;
  31 EXPORT_SYMBOL(pcibios_min_io);
  32 
  33 unsigned long pcibios_min_mem = 0x01000000;
  34 EXPORT_SYMBOL(pcibios_min_mem);
  35 
  36 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  37 {
  38         if ((unsigned long)addr >= VMALLOC_START &&
  39             (unsigned long)addr < VMALLOC_END)
  40                 iounmap(addr);
  41 }
  42 EXPORT_SYMBOL(pci_iounmap);
  43 #endif