m68k/kernel/pcibios.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * pci.c -- basic PCI support code
15  * From arch/i386/kernel/pci-i386.c:
19  * addresses to be allocated in the 0x000-0x0ff region
23  * the low 10 bits of the IO address. The 0x00-0xff region
24  * is reserved for motherboard devices that decode all 16
25  * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
26  * but we want to try to avoid allocating at 0x2900-0x2bff
27  * which might be mirrored at 0x0100-0x03ff..
32 	resource_size_t start = res->start;  in pcibios_align_resource()
34 	if ((res->flags & IORESOURCE_IO) && (start & 0x300))  in pcibios_align_resource()
37 	start = (start + align - 1) & ~(align - 1);  in pcibios_align_resource()
59 		r = dev->resource + idx;  in pcibios_enable_device()
60 		if (!r->start && r->end) {  in pcibios_enable_device()
63 			return -EINVAL;  in pcibios_enable_device()
65 		if (r->flags & IORESOURCE_IO)  in pcibios_enable_device()
67 		if (r->flags & IORESOURCE_MEM)  in pcibios_enable_device()
74 	if ((dev->class >> 16) == PCI_BASE_CLASS_BRIDGE)  in pcibios_enable_device()
79 		pr_info("PCI: enabling device %s (0x%04x -> 0x%04x)\n",  in pcibios_enable_device()
86 void pcibios_fixup_bus(struct pci_bus *bus)  in pcibios_fixup_bus()  argument
90 	list_for_each_entry(dev, &bus->devices, bus_list) {  in pcibios_fixup_bus()