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