arch/arm/mm/iomap.c

   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 #include <asm/vga.h>
  14
  15 unsigned long vga_base;
  16 EXPORT_SYMBOL(vga_base);
  17
  18 #ifdef __io
  19 void __iomem *ioport_map(unsigned long port, unsigned int nr)
  20 {
  21         return __io(port);
  22 }
  23 EXPORT_SYMBOL(ioport_map);
  24
  25 void ioport_unmap(void __iomem *addr)
  26 {
  27 }
  28 EXPORT_SYMBOL(ioport_unmap);
  29 #endif
  30
  31 #ifdef CONFIG_PCI
  32 unsigned long pcibios_min_io = 0x1000;
  33 EXPORT_SYMBOL(pcibios_min_io);
  34
  35 unsigned long pcibios_min_mem = 0x01000000;
  36 EXPORT_SYMBOL(pcibios_min_mem);
  37
  38 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  39 {
  40         if ((unsigned long)addr >= VMALLOC_START &&
  41             (unsigned long)addr < VMALLOC_END)
  42                 iounmap(addr);
  43 }
  44 EXPORT_SYMBOL(pci_iounmap);
  45 #endif