1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Implement the default iomap interfaces
4 *
5 * (C) Copyright 2004 Linus Torvalds
6 * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
7 * (C) Copyright 2007 MIPS Technologies, Inc.
8 * written by Ralf Baechle <ralf@linux-mips.org>
9 */
10 #include <linux/pci.h>
11 #include <linux/export.h>
12 #include <asm/io.h>
13
14 #ifdef CONFIG_PCI_DRIVERS_LEGACY
15
16 void __iomem *__pci_ioport_map(struct pci_dev *dev,
17 unsigned long port, unsigned int nr)
18 {
19 struct pci_controller *ctrl = dev->bus->sysdata;
20 unsigned long base = ctrl->io_map_base;
21
22 /* This will eventually become a BUG_ON but for now be gentle */
23 if (unlikely(!ctrl->io_map_base)) {
24 struct pci_bus *bus = dev->bus;
25 char name[8];
26
27 while (bus->parent)
28 bus = bus->parent;
29
30 ctrl->io_map_base = base = mips_io_port_base;
31
32 sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
33 printk(KERN_WARNING "io_map_base of root PCI bus %s unset. "
34 "Trying to continue but you better\nfix this issue or "
35 "report it to linux-mips@vger.kernel.org or your "
36 "vendor.\n", name);
37 #ifdef CONFIG_PCI_DOMAINS
38 panic("To avoid data corruption io_map_base MUST be set with "
39 "multiple PCI domains.");
40 #endif
41 }
42
43 return (void __iomem *) (ctrl->io_map_base + port);
44 }
45
46 #endif /* CONFIG_PCI_DRIVERS_LEGACY */
47
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.