2 * Port for PPC64 David Engebretsen, IBM Corp.
3 * Contains common pci routines for ppc64 platform, pSeries and iSeries brands.
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 * Rework, based on alpha PCI code.
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version
11 * 2 of the License, or (at your option) any later version.
16 #include <linux/config.h>
17 #include <linux/kernel.h>
18 #include <linux/pci.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/bootmem.h>
23 #include <linux/list.h>
25 #include <asm/processor.h>
28 #include <asm/pci-bridge.h>
29 #include <asm/byteorder.h>
31 #include <asm/machdep.h>
37 #define DBG(fmt...) udbg_printf(fmt)
42 unsigned long pci_probe_only = 1;
43 unsigned long pci_assign_all_buses = 0;
46 * legal IO pages under MAX_ISA_PORT. This is to ensure we don't touch
47 * devices we don't have access to.
49 unsigned long io_page_mask;
51 EXPORT_SYMBOL(io_page_mask);
54 unsigned int pcibios_assign_all_busses(void)
56 return pci_assign_all_buses;
59 /* pci_io_base -- the base address from which io bars are offsets.
60 * This is the lowest I/O base address (so bar values are always positive),
61 * and it *must* be the start of ISA space if an ISA bus exists because
62 * ISA drivers use hard coded offsets. If no ISA bus exists a dummy
63 * page is mapped and isa_io_limit prevents access to it.
65 unsigned long isa_io_base; /* NULL if no ISA bus */
66 EXPORT_SYMBOL(isa_io_base);
67 unsigned long pci_io_base;
68 EXPORT_SYMBOL(pci_io_base);
70 void iSeries_pcibios_init(void);
74 struct dma_mapping_ops pci_dma_ops;
75 EXPORT_SYMBOL(pci_dma_ops);
77 int global_phb_number; /* Global phb counter */
79 /* Cached ISA bridge dev. */
80 struct pci_dev *ppc64_isabridge_dev = NULL;
82 static void fixup_broken_pcnet32(struct pci_dev* dev)
84 if ((dev->class>>8 == PCI_CLASS_NETWORK_ETHERNET)) {
85 dev->vendor = PCI_VENDOR_ID_AMD;
86 pci_write_config_word(dev, PCI_VENDOR_ID, PCI_VENDOR_ID_AMD);
90 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_TRIDENT, PCI_ANY_ID, fixup_broken_pcnet32);
92 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
95 unsigned long offset = 0;
96 struct pci_controller *hose = pci_bus_to_host(dev->bus);
101 if (res->flags & IORESOURCE_IO)
102 offset = (unsigned long)hose->io_base_virt - pci_io_base;
104 if (res->flags & IORESOURCE_MEM)
105 offset = hose->pci_mem_offset;
107 region->start = res->start - offset;
108 region->end = res->end - offset;
111 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
112 struct pci_bus_region *region)
114 unsigned long offset = 0;
115 struct pci_controller *hose = pci_bus_to_host(dev->bus);
120 if (res->flags & IORESOURCE_IO)
121 offset = (unsigned long)hose->io_base_virt - pci_io_base;
123 if (res->flags & IORESOURCE_MEM)
124 offset = hose->pci_mem_offset;
126 res->start = region->start + offset;
127 res->end = region->end + offset;
130 #ifdef CONFIG_HOTPLUG
131 EXPORT_SYMBOL(pcibios_resource_to_bus);
132 EXPORT_SYMBOL(pcibios_bus_to_resource);
136 * We need to avoid collisions with `mirrored' VGA ports
137 * and other strange ISA hardware, so we always want the
138 * addresses to be allocated in the 0x000-0x0ff region
141 * Why? Because some silly external IO cards only decode
142 * the low 10 bits of the IO address. The 0x00-0xff region
143 * is reserved for motherboard devices that decode all 16
144 * bits, so it's ok to allocate at, say, 0x2800-0x28ff,
145 * but we want to try to avoid allocating at 0x2900-0x2bff
146 * which might have be mirrored at 0x0100-0x03ff..
148 void pcibios_align_resource(void *data, struct resource *res,
149 unsigned long size, unsigned long align)
151 struct pci_dev *dev = data;
152 struct pci_controller *hose = pci_bus_to_host(dev->bus);
153 unsigned long start = res->start;
154 unsigned long alignto;
156 if (res->flags & IORESOURCE_IO) {
157 unsigned long offset = (unsigned long)hose->io_base_virt -
159 /* Make sure we start at our min on all hoses */
160 if (start - offset < PCIBIOS_MIN_IO)
161 start = PCIBIOS_MIN_IO + offset;
164 * Put everything into 0x00-0xff region modulo 0x400
167 start = (start + 0x3ff) & ~0x3ff;
169 } else if (res->flags & IORESOURCE_MEM) {
170 /* Make sure we start at our min on all hoses */
171 if (start - hose->pci_mem_offset < PCIBIOS_MIN_MEM)
172 start = PCIBIOS_MIN_MEM + hose->pci_mem_offset;
174 /* Align to multiple of size of minimum base. */
175 alignto = max(0x1000UL, align);
176 start = ALIGN(start, alignto);
182 static DEFINE_SPINLOCK(hose_spinlock);
185 * pci_controller(phb) initialized common variables.
187 void __devinit pci_setup_pci_controller(struct pci_controller *hose)
189 memset(hose, 0, sizeof(struct pci_controller));
191 spin_lock(&hose_spinlock);
192 hose->global_number = global_phb_number++;
193 list_add_tail(&hose->list_node, &hose_list);
194 spin_unlock(&hose_spinlock);
197 static void __init pcibios_claim_one_bus(struct pci_bus *b)
200 struct pci_bus *child_bus;
202 list_for_each_entry(dev, &b->devices, bus_list) {
205 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
206 struct resource *r = &dev->resource[i];
208 if (r->parent || !r->start || !r->flags)
210 pci_claim_resource(dev, i);
214 list_for_each_entry(child_bus, &b->children, node)
215 pcibios_claim_one_bus(child_bus);
218 #ifndef CONFIG_PPC_ISERIES
219 static void __init pcibios_claim_of_setup(void)
223 list_for_each_entry(b, &pci_root_buses, node)
224 pcibios_claim_one_bus(b);
228 static int __init pcibios_init(void)
230 struct pci_controller *hose, *tmp;
233 /* For now, override phys_mem_access_prot. If we need it,
234 * later, we may move that initialization to each ppc_md
236 ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
238 #ifdef CONFIG_PPC_ISERIES
239 iSeries_pcibios_init();
242 printk("PCI: Probing PCI hardware\n");
244 /* Scan all of the recorded PCI controllers. */
245 list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
246 hose->last_busno = 0xff;
247 bus = pci_scan_bus(hose->first_busno, hose->ops,
250 hose->last_busno = bus->subordinate;
253 #ifndef CONFIG_PPC_ISERIES
255 pcibios_claim_of_setup();
257 /* FIXME: `else' will be removed when
258 pci_assign_unassigned_resources() is able to work
259 correctly with [partially] allocated PCI tree. */
260 pci_assign_unassigned_resources();
261 #endif /* !CONFIG_PPC_ISERIES */
263 /* Call machine dependent final fixup */
264 if (ppc_md.pcibios_fixup)
265 ppc_md.pcibios_fixup();
267 /* Cache the location of the ISA bridge (if we have one) */
268 ppc64_isabridge_dev = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, NULL);
269 if (ppc64_isabridge_dev != NULL)
270 printk("ISA bridge at %s\n", pci_name(ppc64_isabridge_dev));
272 printk("PCI: Probing PCI hardware done\n");
277 subsys_initcall(pcibios_init);
279 char __init *pcibios_setup(char *str)
284 int pcibios_enable_device(struct pci_dev *dev, int mask)
289 pci_read_config_word(dev, PCI_COMMAND, &cmd);
292 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
293 struct resource *res = &dev->resource[i];
295 /* Only set up the requested stuff */
296 if (!(mask & (1<<i)))
299 if (res->flags & IORESOURCE_IO)
300 cmd |= PCI_COMMAND_IO;
301 if (res->flags & IORESOURCE_MEM)
302 cmd |= PCI_COMMAND_MEMORY;
306 printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
308 /* Enable the appropriate bits in the PCI command register. */
309 pci_write_config_word(dev, PCI_COMMAND, cmd);
315 * Return the domain number for this bus.
317 int pci_domain_nr(struct pci_bus *bus)
319 #ifdef CONFIG_PPC_ISERIES
322 struct pci_controller *hose = pci_bus_to_host(bus);
324 return hose->global_number;
328 EXPORT_SYMBOL(pci_domain_nr);
330 /* Decide whether to display the domain number in /proc */
331 int pci_proc_domain(struct pci_bus *bus)
333 #ifdef CONFIG_PPC_ISERIES
336 struct pci_controller *hose = pci_bus_to_host(bus);
342 * Platform support for /proc/bus/pci/X/Y mmap()s,
343 * modelled on the sparc64 implementation by Dave Miller.
348 * Adjust vm_pgoff of VMA such that it is the physical page offset
349 * corresponding to the 32-bit pci bus offset for DEV requested by the user.
351 * Basically, the user finds the base address for his device which he wishes
352 * to mmap. They read the 32-bit value from the config space base register,
353 * add whatever PAGE_SIZE multiple offset they wish, and feed this into the
354 * offset parameter of mmap on /proc/bus/pci/XXX for that device.
356 * Returns negative error code on failure, zero on success.
358 static struct resource *__pci_mmap_make_offset(struct pci_dev *dev,
359 unsigned long *offset,
360 enum pci_mmap_state mmap_state)
362 struct pci_controller *hose = pci_bus_to_host(dev->bus);
363 unsigned long io_offset = 0;
367 return NULL; /* should never happen */
369 /* If memory, add on the PCI bridge address offset */
370 if (mmap_state == pci_mmap_mem) {
371 *offset += hose->pci_mem_offset;
372 res_bit = IORESOURCE_MEM;
374 io_offset = (unsigned long)hose->io_base_virt - pci_io_base;
375 *offset += io_offset;
376 res_bit = IORESOURCE_IO;
380 * Check that the offset requested corresponds to one of the
381 * resources of the device.
383 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
384 struct resource *rp = &dev->resource[i];
385 int flags = rp->flags;
387 /* treat ROM as memory (should be already) */
388 if (i == PCI_ROM_RESOURCE)
389 flags |= IORESOURCE_MEM;
391 /* Active and same type? */
392 if ((flags & res_bit) == 0)
395 /* In the range of this resource? */
396 if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end)
399 /* found it! construct the final physical address */
400 if (mmap_state == pci_mmap_io)
401 *offset += hose->io_base_phys - io_offset;
409 * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci
412 static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp,
414 enum pci_mmap_state mmap_state,
417 unsigned long prot = pgprot_val(protection);
419 /* Write combine is always 0 on non-memory space mappings. On
420 * memory space, if the user didn't pass 1, we check for a
421 * "prefetchable" resource. This is a bit hackish, but we use
422 * this to workaround the inability of /sysfs to provide a write
425 if (mmap_state != pci_mmap_mem)
427 else if (write_combine == 0) {
428 if (rp->flags & IORESOURCE_PREFETCH)
432 /* XXX would be nice to have a way to ask for write-through */
433 prot |= _PAGE_NO_CACHE;
435 prot &= ~_PAGE_GUARDED;
437 prot |= _PAGE_GUARDED;
439 printk("PCI map for %s:%lx, prot: %lx\n", pci_name(dev), rp->start,
442 return __pgprot(prot);
446 * This one is used by /dev/mem and fbdev who have no clue about the
447 * PCI device, it tries to find the PCI device first and calls the
450 pgprot_t pci_phys_mem_access_prot(struct file *file,
451 unsigned long offset,
455 struct pci_dev *pdev = NULL;
456 struct resource *found = NULL;
457 unsigned long prot = pgprot_val(protection);
460 if (page_is_ram(offset >> PAGE_SHIFT))
461 return __pgprot(prot);
463 prot |= _PAGE_NO_CACHE | _PAGE_GUARDED;
465 for_each_pci_dev(pdev) {
466 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
467 struct resource *rp = &pdev->resource[i];
468 int flags = rp->flags;
470 /* Active and same type? */
471 if ((flags & IORESOURCE_MEM) == 0)
473 /* In the range of this resource? */
474 if (offset < (rp->start & PAGE_MASK) ||
484 if (found->flags & IORESOURCE_PREFETCH)
485 prot &= ~_PAGE_GUARDED;
489 DBG("non-PCI map for %lx, prot: %lx\n", offset, prot);
491 return __pgprot(prot);
496 * Perform the actual remap of the pages for a PCI device mapping, as
497 * appropriate for this architecture. The region in the process to map
498 * is described by vm_start and vm_end members of VMA, the base physical
499 * address is found in vm_pgoff.
500 * The pci device structure is provided so that architectures may make mapping
501 * decisions on a per-device or per-bus basis.
503 * Returns a negative error code on failure, zero on success.
505 int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
506 enum pci_mmap_state mmap_state,
509 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
513 rp = __pci_mmap_make_offset(dev, &offset, mmap_state);
517 vma->vm_pgoff = offset >> PAGE_SHIFT;
518 vma->vm_flags |= VM_SHM | VM_LOCKED | VM_IO;
519 vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp,
521 mmap_state, write_combine);
523 ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
524 vma->vm_end - vma->vm_start, vma->vm_page_prot);
529 #ifdef CONFIG_PPC_MULTIPLATFORM
530 static ssize_t pci_show_devspec(struct device *dev, struct device_attribute *attr, char *buf)
532 struct pci_dev *pdev;
533 struct device_node *np;
535 pdev = to_pci_dev (dev);
536 np = pci_device_to_OF_node(pdev);
537 if (np == NULL || np->full_name == NULL)
539 return sprintf(buf, "%s", np->full_name);
541 static DEVICE_ATTR(devspec, S_IRUGO, pci_show_devspec, NULL);
542 #endif /* CONFIG_PPC_MULTIPLATFORM */
544 void pcibios_add_platform_entries(struct pci_dev *pdev)
546 #ifdef CONFIG_PPC_MULTIPLATFORM
547 device_create_file(&pdev->dev, &dev_attr_devspec);
548 #endif /* CONFIG_PPC_MULTIPLATFORM */
551 #ifdef CONFIG_PPC_MULTIPLATFORM
553 #define ISA_SPACE_MASK 0x1
554 #define ISA_SPACE_IO 0x1
556 static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
557 unsigned long phb_io_base_phys,
558 void __iomem * phb_io_base_virt)
560 struct isa_range *range;
561 unsigned long pci_addr;
562 unsigned int isa_addr;
566 range = (struct isa_range *) get_property(isa_node, "ranges", &rlen);
567 if (range == NULL || (rlen < sizeof(struct isa_range))) {
568 printk(KERN_ERR "no ISA ranges or unexpected isa range size,"
570 __ioremap_explicit(phb_io_base_phys,
571 (unsigned long)phb_io_base_virt,
572 0x10000, _PAGE_NO_CACHE | _PAGE_GUARDED);
576 /* From "ISA Binding to 1275"
577 * The ranges property is laid out as an array of elements,
578 * each of which comprises:
579 * cells 0 - 1: an ISA address
580 * cells 2 - 4: a PCI address
581 * (size depending on dev->n_addr_cells)
582 * cell 5: the size of the range
584 if ((range->isa_addr.a_hi && ISA_SPACE_MASK) == ISA_SPACE_IO) {
585 isa_addr = range->isa_addr.a_lo;
586 pci_addr = (unsigned long) range->pci_addr.a_mid << 32 |
587 range->pci_addr.a_lo;
589 /* Assume these are both zero */
590 if ((pci_addr != 0) || (isa_addr != 0)) {
591 printk(KERN_ERR "unexpected isa to pci mapping: %s\n",
596 size = PAGE_ALIGN(range->size);
598 __ioremap_explicit(phb_io_base_phys,
599 (unsigned long) phb_io_base_virt,
600 size, _PAGE_NO_CACHE | _PAGE_GUARDED);
604 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
605 struct device_node *dev)
607 unsigned int *ranges;
611 struct resource *res;
612 int np, na = prom_n_addr_cells(dev);
613 unsigned long pci_addr, cpu_phys_addr;
617 /* From "PCI Binding to 1275"
618 * The ranges property is laid out as an array of elements,
619 * each of which comprises:
620 * cells 0 - 2: a PCI address
621 * cells 3 or 3+4: a CPU physical address
622 * (size depending on dev->n_addr_cells)
623 * cells 4+5 or 5+6: the size of the range
626 hose->io_base_phys = 0;
627 ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
628 while ((rlen -= np * sizeof(unsigned int)) >= 0) {
630 pci_addr = (unsigned long)ranges[1] << 32 | ranges[2];
632 cpu_phys_addr = ranges[3];
634 cpu_phys_addr = cpu_phys_addr << 32 | ranges[4];
636 size = (unsigned long)ranges[na+3] << 32 | ranges[na+4];
639 switch ((ranges[0] >> 24) & 0x3) {
640 case 1: /* I/O space */
641 hose->io_base_phys = cpu_phys_addr;
642 hose->pci_io_size = size;
644 res = &hose->io_resource;
645 res->flags = IORESOURCE_IO;
646 res->start = pci_addr;
647 DBG("phb%d: IO 0x%lx -> 0x%lx\n", hose->global_number,
648 res->start, res->start + size - 1);
650 case 2: /* memory space */
652 while (memno < 3 && hose->mem_resources[memno].flags)
656 hose->pci_mem_offset = cpu_phys_addr - pci_addr;
658 res = &hose->mem_resources[memno];
659 res->flags = IORESOURCE_MEM;
660 res->start = cpu_phys_addr;
661 DBG("phb%d: MEM 0x%lx -> 0x%lx\n", hose->global_number,
662 res->start, res->start + size - 1);
667 res->name = dev->full_name;
668 res->end = res->start + size - 1;
677 void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
679 unsigned long size = hose->pci_io_size;
680 unsigned long io_virt_offset;
681 struct resource *res;
682 struct device_node *isa_dn;
684 hose->io_base_virt = reserve_phb_iospace(size);
685 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
686 hose->global_number, hose->io_base_phys,
687 (unsigned long) hose->io_base_virt);
690 pci_io_base = (unsigned long)hose->io_base_virt;
691 isa_dn = of_find_node_by_type(NULL, "isa");
693 isa_io_base = pci_io_base;
694 pci_process_ISA_OF_ranges(isa_dn, hose->io_base_phys,
702 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
703 res = &hose->io_resource;
704 res->start += io_virt_offset;
705 res->end += io_virt_offset;
708 void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
711 unsigned long size = hose->pci_io_size;
712 unsigned long io_virt_offset;
713 struct resource *res;
715 hose->io_base_virt = __ioremap(hose->io_base_phys, size,
716 _PAGE_NO_CACHE | _PAGE_GUARDED);
717 DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
718 hose->global_number, hose->io_base_phys,
719 (unsigned long) hose->io_base_virt);
722 pci_io_base = (unsigned long)hose->io_base_virt;
724 io_virt_offset = (unsigned long)hose->io_base_virt - pci_io_base;
725 res = &hose->io_resource;
726 res->start += io_virt_offset;
727 res->end += io_virt_offset;
731 static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
732 unsigned long *start_virt, unsigned long *size)
734 struct pci_controller *hose = pci_bus_to_host(bus);
735 struct pci_bus_region region;
736 struct resource *res;
739 res = bus->resource[0];
740 pcibios_resource_to_bus(bus->self, ®ion, res);
741 *start_phys = hose->io_base_phys + region.start;
742 *start_virt = (unsigned long) hose->io_base_virt +
744 if (region.end > region.start)
745 *size = region.end - region.start + 1;
747 printk("%s(): unexpected region 0x%lx->0x%lx\n",
748 __FUNCTION__, region.start, region.end);
754 res = &hose->io_resource;
755 *start_phys = hose->io_base_phys;
756 *start_virt = (unsigned long) hose->io_base_virt;
757 if (res->end > res->start)
758 *size = res->end - res->start + 1;
760 printk("%s(): unexpected region 0x%lx->0x%lx\n",
761 __FUNCTION__, res->start, res->end);
769 int unmap_bus_range(struct pci_bus *bus)
771 unsigned long start_phys;
772 unsigned long start_virt;
776 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
780 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
782 if (iounmap_explicit((void __iomem *) start_virt, size))
787 EXPORT_SYMBOL(unmap_bus_range);
789 int remap_bus_range(struct pci_bus *bus)
791 unsigned long start_phys;
792 unsigned long start_virt;
796 printk(KERN_ERR "%s() expected bus\n", __FUNCTION__);
801 if (get_bus_io_range(bus, &start_phys, &start_virt, &size))
803 printk("mapping IO %lx -> %lx, size: %lx\n", start_phys, start_virt, size);
804 if (__ioremap_explicit(start_phys, start_virt, size,
805 _PAGE_NO_CACHE | _PAGE_GUARDED))
810 EXPORT_SYMBOL(remap_bus_range);
812 void phbs_remap_io(void)
814 struct pci_controller *hose, *tmp;
816 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
817 remap_bus_range(hose->bus);
821 * ppc64 can have multifunction devices that do not respond to function 0.
822 * In this case we must scan all functions.
824 int pcibios_scan_all_fns(struct pci_bus *bus, int devfn)
826 struct device_node *busdn, *dn;
829 busdn = pci_device_to_OF_node(bus->self);
831 busdn = bus->sysdata; /* must be a phb */
837 * Check to see if there is any of the 8 functions are in the
838 * device tree. If they are then we need to scan all the
839 * functions of this slot.
841 for (dn = busdn->child; dn; dn = dn->sibling)
842 if ((dn->devfn >> 3) == (devfn >> 3))
849 void __devinit pcibios_fixup_device_resources(struct pci_dev *dev,
852 /* Update device resources. */
853 struct pci_controller *hose = pci_bus_to_host(bus);
856 for (i = 0; i < PCI_NUM_RESOURCES; i++) {
857 if (dev->resource[i].flags & IORESOURCE_IO) {
858 unsigned long offset = (unsigned long)hose->io_base_virt
860 unsigned long start, end, mask;
862 start = dev->resource[i].start += offset;
863 end = dev->resource[i].end += offset;
865 /* Need to allow IO access to pages that are in the
867 if (start < MAX_ISA_PORT) {
868 if (end > MAX_ISA_PORT)
871 start >>= PAGE_SHIFT;
874 /* get the range of pages for the map */
875 mask = ((1 << (end+1))-1) ^ ((1 << start)-1);
876 io_page_mask |= mask;
879 else if (dev->resource[i].flags & IORESOURCE_MEM) {
880 dev->resource[i].start += hose->pci_mem_offset;
881 dev->resource[i].end += hose->pci_mem_offset;
885 EXPORT_SYMBOL(pcibios_fixup_device_resources);
887 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
889 struct pci_controller *hose = pci_bus_to_host(bus);
890 struct pci_dev *dev = bus->self;
891 struct resource *res;
898 bus->resource[0] = res = &hose->io_resource;
900 if (res->flags && request_resource(&ioport_resource, res))
901 printk(KERN_ERR "Failed to request IO on "
902 "PCI domain %d\n", pci_domain_nr(bus));
904 for (i = 0; i < 3; ++i) {
905 res = &hose->mem_resources[i];
906 bus->resource[i+1] = res;
907 if (res->flags && request_resource(&iomem_resource, res))
908 printk(KERN_ERR "Failed to request MEM on "
912 } else if (pci_probe_only &&
913 (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
914 /* This is a subordinate bridge */
916 pci_read_bridge_bases(bus);
917 pcibios_fixup_device_resources(dev, bus);
920 ppc_md.iommu_bus_setup(bus);
922 list_for_each_entry(dev, &bus->devices, bus_list)
923 ppc_md.iommu_dev_setup(dev);
925 if (ppc_md.irq_bus_setup)
926 ppc_md.irq_bus_setup(bus);
931 list_for_each_entry(dev, &bus->devices, bus_list) {
932 if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI)
933 pcibios_fixup_device_resources(dev, bus);
936 EXPORT_SYMBOL(pcibios_fixup_bus);
939 * Reads the interrupt pin to determine if interrupt is use by card.
940 * If the interrupt is used, then gets the interrupt line from the
941 * openfirmware and sets it in the pci_dev and pci_config line.
943 int pci_read_irq_line(struct pci_dev *pci_dev)
946 struct device_node *node;
948 pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &intpin);
952 node = pci_device_to_OF_node(pci_dev);
956 if (node->n_intrs == 0)
959 pci_dev->irq = node->intrs[0].line;
961 pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, pci_dev->irq);
965 EXPORT_SYMBOL(pci_read_irq_line);
967 void pci_resource_to_user(const struct pci_dev *dev, int bar,
968 const struct resource *rsrc,
969 u64 *start, u64 *end)
971 struct pci_controller *hose = pci_bus_to_host(dev->bus);
972 unsigned long offset = 0;
977 if (rsrc->flags & IORESOURCE_IO)
978 offset = pci_io_base - (unsigned long)hose->io_base_virt +
981 *start = rsrc->start + offset;
982 *end = rsrc->end + offset;
985 #endif /* CONFIG_PPC_MULTIPLATFORM */