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);
59
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