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