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46 lines
1.3 KiB
46 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Implement the default iomap interfaces |
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* |
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* (C) Copyright 2004 Linus Torvalds |
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* (C) Copyright 2006 Ralf Baechle <[email protected]> |
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* (C) Copyright 2007 MIPS Technologies, Inc. |
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* written by Ralf Baechle <[email protected]> |
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*/ |
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#include <linux/pci.h> |
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#include <linux/export.h> |
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#include <asm/io.h> |
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#ifdef CONFIG_PCI_DRIVERS_LEGACY |
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void __iomem *__pci_ioport_map(struct pci_dev *dev, |
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unsigned long port, unsigned int nr) |
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{ |
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struct pci_controller *ctrl = dev->bus->sysdata; |
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unsigned long base = ctrl->io_map_base; |
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/* This will eventually become a BUG_ON but for now be gentle */ |
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if (unlikely(!ctrl->io_map_base)) { |
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struct pci_bus *bus = dev->bus; |
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char name[8]; |
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while (bus->parent) |
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bus = bus->parent; |
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ctrl->io_map_base = base = mips_io_port_base; |
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sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number); |
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printk(KERN_WARNING "io_map_base of root PCI bus %s unset. " |
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"Trying to continue but you better\nfix this issue or " |
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"report it to [email protected] or your " |
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"vendor.\n", name); |
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#ifdef CONFIG_PCI_DOMAINS |
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panic("To avoid data corruption io_map_base MUST be set with " |
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"multiple PCI domains."); |
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#endif |
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} |
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return (void __iomem *) (ctrl->io_map_base + port); |
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} |
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#endif /* CONFIG_PCI_DRIVERS_LEGACY */
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