arch/microblaze/pci/iomap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ppc64 "iomap" interface implementation.
   4  *
   5  * (C) Copyright 2004 Linus Torvalds
   6  */
   7 #include <linux/init.h>
   8 #include <linux/pci.h>
   9 #include <linux/mm.h>
  10 #include <linux/export.h>
  11 #include <linux/io.h>
  12 #include <asm/pci-bridge.h>
  13
  14 static DEFINE_SPINLOCK(hose_spinlock);
  15 LIST_HEAD(hose_list);
  16
  17 unsigned long isa_io_base;
  18 EXPORT_SYMBOL(isa_io_base);
  19
  20 static resource_size_t pcibios_io_size(const struct pci_controller *hose)
  21 {
  22         return resource_size(&hose->io_resource);
  23 }
  24
  25 int pcibios_vaddr_is_ioport(void __iomem *address)
  26 {
  27         int ret = 0;
  28         struct pci_controller *hose;
  29         resource_size_t size;
  30
  31         spin_lock(&hose_spinlock);
  32         list_for_each_entry(hose, &hose_list, list_node) {
  33                 size = pcibios_io_size(hose);
  34                 if (address >= hose->io_base_virt &&
  35                     address < (hose->io_base_virt + size)) {
  36                         ret = 1;
  37                         break;
  38                 }
  39         }
  40         spin_unlock(&hose_spinlock);
  41         return ret;
  42 }
  43
  44 /* Display the domain number in /proc */
  45 int pci_proc_domain(struct pci_bus *bus)
  46 {
  47         return pci_domain_nr(bus);
  48 }
  49
  50 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
  51 {
  52         if (isa_vaddr_is_ioport(addr))
  53                 return;
  54         if (pcibios_vaddr_is_ioport(addr))
  55                 return;
  56         iounmap(addr);
  57 }
  58 EXPORT_SYMBOL(pci_iounmap);