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 14static DEFINE_SPINLOCK(hose_spinlock); 15LIST_HEAD(hose_list); 16 17unsigned long isa_io_base; 18EXPORT_SYMBOL(isa_io_base); 19 20static resource_size_t pcibios_io_size(const struct pci_controller *hose) 21{ 22 return resource_size(&hose->io_resource); 23} 24 25int 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 */ 45int pci_proc_domain(struct pci_bus *bus) 46{ 47 return pci_domain_nr(bus); 48} 49 50void 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} 58EXPORT_SYMBOL(pci_iounmap); 59