| 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(res: &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(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(lock: &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(address: addr)) |
| 55 | return; |
| 56 | iounmap(addr); |
| 57 | } |
| 58 | EXPORT_SYMBOL(pci_iounmap); |
| 59 |