| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * ppc64 "iomap" interface implementation. |
| * |
| * (C) Copyright 2004 Linus Torvalds |
| */ |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/mm.h> |
| #include <linux/export.h> |
| #include <linux/io.h> |
| #include <asm/pci-bridge.h> |
| |
| static DEFINE_SPINLOCK(hose_spinlock); |
| LIST_HEAD(hose_list); |
| |
| unsigned long isa_io_base; |
| EXPORT_SYMBOL(isa_io_base); |
| |
| static resource_size_t pcibios_io_size(const struct pci_controller *hose) |
| { |
| return resource_size(&hose->io_resource); |
| } |
| |
| int pcibios_vaddr_is_ioport(void __iomem *address) |
| { |
| int ret = 0; |
| struct pci_controller *hose; |
| resource_size_t size; |
| |
| spin_lock(&hose_spinlock); |
| list_for_each_entry(hose, &hose_list, list_node) { |
| size = pcibios_io_size(hose); |
| if (address >= hose->io_base_virt && |
| address < (hose->io_base_virt + size)) { |
| ret = 1; |
| break; |
| } |
| } |
| spin_unlock(&hose_spinlock); |
| return ret; |
| } |
| |
| /* Display the domain number in /proc */ |
| int pci_proc_domain(struct pci_bus *bus) |
| { |
| return pci_domain_nr(bus); |
| } |
| |
| void pci_iounmap(struct pci_dev *dev, void __iomem *addr) |
| { |
| if (isa_vaddr_is_ioport(addr)) |
| return; |
| if (pcibios_vaddr_is_ioport(addr)) |
| return; |
| iounmap(addr); |
| } |
| EXPORT_SYMBOL(pci_iounmap); |