1 /* $Id: ioport.c,v 1.45 2001/10/30 04:54:21 davem Exp $
2 * ioport.c: Simple io mapping allocator.
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
7 * 1996: sparc_free_io, 1999: ioremap()/iounmap() by Pete Zaitcev.
10 * <rth> zait: as long as pci_alloc_consistent produces something addressable,
12 * <zaitcev> rth: no, it is relevant, because get_free_pages returns you a
13 * pointer into the big page mapping
14 * <rth> zait: so what?
15 * <rth> zait: remap_it_my_way(virt_to_phys(get_free_page()))
17 * <zaitcev> Suppose I did this remap_it_my_way(virt_to_phys(get_free_page())).
19 * <zaitcev> Now, driver calls pci_free_consistent(with result of
21 * <zaitcev> How do you find the address to pass to free_pages()?
22 * <rth> zait: walk the page tables? It's only two or three level after all.
23 * <rth> zait: you have to walk them anyway to remove the mapping.
25 * <zaitcev> Sounds reasonable
28 #include <linux/module.h>
29 #include <linux/sched.h>
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/types.h>
33 #include <linux/ioport.h>
35 #include <linux/slab.h>
36 #include <linux/pci.h> /* struct pci_dev */
37 #include <linux/proc_fs.h>
38 #include <linux/scatterlist.h>
41 #include <asm/vaddrs.h>
42 #include <asm/oplib.h>
44 #include <asm/of_device.h>
47 #include <asm/pgalloc.h>
50 #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
52 struct resource *_sparc_find_resource(struct resource *r, unsigned long);
54 static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
55 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
56 unsigned long size, char *name);
57 static void _sparc_free_io(struct resource *res);
59 /* This points to the next to use virtual memory for DVMA mappings */
60 static struct resource _sparc_dvma = {
61 .name = "sparc_dvma", .start = DVMA_VADDR, .end = DVMA_END - 1
63 /* This points to the start of I/O mappings, cluable from outside. */
64 /*ext*/ struct resource sparc_iomap = {
65 .name = "sparc_iomap", .start = IOBASE_VADDR, .end = IOBASE_END - 1
69 * Our mini-allocator...
70 * Boy this is gross! We need it because we must map I/O for
71 * timers and interrupt controller before the kmalloc is available.
75 #define XNRES 10 /* SS-10 uses 8 */
78 struct resource xres; /* Must be first */
79 int xflag; /* 1 == used */
83 static struct xresource xresv[XNRES];
85 static struct xresource *xres_alloc(void) {
86 struct xresource *xrp;
90 for (n = 0; n < XNRES; n++) {
91 if (xrp->xflag == 0) {
100 static void xres_free(struct xresource *xrp) {
105 * These are typically used in PCI drivers
106 * which are trying to be cross-platform.
108 * Bus type is always zero on IIep.
110 void __iomem *ioremap(unsigned long offset, unsigned long size)
114 sprintf(name, "phys_%08x", (u32)offset);
115 return _sparc_alloc_io(0, offset, size, name);
119 * Comlimentary to ioremap().
121 void iounmap(volatile void __iomem *virtual)
123 unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
124 struct resource *res;
126 if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {
127 printk("free_io/iounmap: cannot free %lx\n", vaddr);
132 if ((char *)res >= (char*)xresv && (char *)res < (char *)&xresv[XNRES]) {
133 xres_free((struct xresource *)res);
141 void __iomem *sbus_ioremap(struct resource *phyres, unsigned long offset,
142 unsigned long size, char *name)
144 return _sparc_alloc_io(phyres->flags & 0xF,
145 phyres->start + offset, size, name);
148 void __iomem *of_ioremap(struct resource *res, unsigned long offset,
149 unsigned long size, char *name)
151 return _sparc_alloc_io(res->flags & 0xF,
155 EXPORT_SYMBOL(of_ioremap);
157 void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
161 EXPORT_SYMBOL(of_iounmap);
165 void sbus_iounmap(volatile void __iomem *addr, unsigned long size)
173 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
174 unsigned long size, char *name)
176 static int printed_full;
177 struct xresource *xres;
178 struct resource *res;
181 void __iomem *va; /* P3 diag */
183 if (name == NULL) name = "???";
185 if ((xres = xres_alloc()) != 0) {
190 printk("ioremap: done with statics, switching to malloc\n");
194 tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
195 if (tack == NULL) return NULL;
196 memset(tack, 0, sizeof(struct resource));
197 res = (struct resource *) tack;
198 tack += sizeof (struct resource);
201 strlcpy(tack, name, XNMLN+1);
204 va = _sparc_ioremap(res, busno, phys, size);
205 /* printk("ioremap(0x%x:%08lx[0x%lx])=%p\n", busno, phys, size, va); */ /* P3 diag */
211 static void __iomem *
212 _sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz)
214 unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
216 if (allocate_resource(&sparc_iomap, res,
217 (offset + sz + PAGE_SIZE-1) & PAGE_MASK,
218 sparc_iomap.start, sparc_iomap.end, PAGE_SIZE, NULL, NULL) != 0) {
219 /* Usually we cannot see printks in this case. */
220 prom_printf("alloc_io_res(%s): cannot occupy\n",
221 (res->name != NULL)? res->name: "???");
226 sparc_mapiorange(bus, pa, res->start, res->end - res->start + 1);
228 return (void __iomem *)(unsigned long)(res->start + offset);
232 * Comlimentary to _sparc_ioremap().
234 static void _sparc_free_io(struct resource *res)
238 plen = res->end - res->start + 1;
239 BUG_ON((plen & (PAGE_SIZE-1)) != 0);
240 sparc_unmapiorange(res->start, plen);
241 release_resource(res);
246 void sbus_set_sbus64(struct sbus_dev *sdev, int x)
248 printk("sbus_set_sbus64: unsupported\n");
251 extern unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq);
252 void __init sbus_fill_device_irq(struct sbus_dev *sdev)
254 struct linux_prom_irqs irqs[PROMINTR_MAX];
257 len = prom_getproperty(sdev->prom_node, "intr",
258 (char *)irqs, sizeof(irqs));
260 sdev->num_irqs = len / 8;
261 if (sdev->num_irqs == 0) {
263 } else if (sparc_cpu_model == sun4d) {
264 for (len = 0; len < sdev->num_irqs; len++)
266 sun4d_build_irq(sdev, irqs[len].pri);
268 for (len = 0; len < sdev->num_irqs; len++)
269 sdev->irqs[len] = irqs[len].pri;
272 int interrupts[PROMINTR_MAX];
274 /* No "intr" node found-- check for "interrupts" node.
275 * This node contains SBus interrupt levels, not IPLs
276 * as in "intr", and no vector values. We convert
277 * SBus interrupt levels to PILs (platform specific).
279 len = prom_getproperty(sdev->prom_node, "interrupts",
280 (char *)interrupts, sizeof(interrupts));
285 sdev->num_irqs = len / sizeof(int);
286 for (len = 0; len < sdev->num_irqs; len++) {
288 sbint_to_irq(sdev, interrupts[len]);
295 * Allocate a chunk of memory suitable for DMA.
296 * Typically devices use them for control blocks.
297 * CPU may access them without any explicit flushing.
299 * XXX Some clever people know that sdev is not used and supply NULL. Watch.
301 void *sbus_alloc_consistent(struct sbus_dev *sdev, long len, u32 *dma_addrp)
303 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
305 struct resource *res;
308 /* XXX why are some lengths signed, others unsigned? */
312 /* XXX So what is maxphys for us and how do drivers know it? */
313 if (len > 256*1024) { /* __get_free_pages() limit */
317 order = get_order(len_total);
318 if ((va = __get_free_pages(GFP_KERNEL|__GFP_COMP, order)) == 0)
321 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL)
324 if (allocate_resource(&_sparc_dvma, res, len_total,
325 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
326 printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
329 mmu_inval_dma_area(va, len_total);
330 // XXX The mmu_map_dma_area does this for us below, see comments.
331 // sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
333 * XXX That's where sdev would be used. Currently we load
334 * all iommu tables with the same translations.
336 if (mmu_map_dma_area(dma_addrp, va, res->start, len_total) != 0)
339 /* Set the resource name, if known. */
341 res->name = sdev->prom_name;
344 return (void *)(unsigned long)res->start;
347 release_resource(res);
349 free_pages(va, order);
356 void sbus_free_consistent(struct sbus_dev *sdev, long n, void *p, u32 ba)
358 struct resource *res;
361 if ((res = _sparc_find_resource(&_sparc_dvma,
362 (unsigned long)p)) == NULL) {
363 printk("sbus_free_consistent: cannot free %p\n", p);
367 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
368 printk("sbus_free_consistent: unaligned va %p\n", p);
372 n = (n + PAGE_SIZE-1) & PAGE_MASK;
373 if ((res->end-res->start)+1 != n) {
374 printk("sbus_free_consistent: region 0x%lx asked 0x%lx\n",
375 (long)((res->end-res->start)+1), n);
379 release_resource(res);
382 /* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
383 pgv = mmu_translate_dvma(ba);
384 mmu_unmap_dma_area(ba, n);
386 __free_pages(pgv, get_order(n));
390 * Map a chunk of memory so that devices can see it.
391 * CPU view of this memory may be inconsistent with
392 * a device view and explicit flushing is necessary.
394 dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *va, size_t len, int direction)
396 /* XXX why are some lengths signed, others unsigned? */
400 /* XXX So what is maxphys for us and how do drivers know it? */
401 if (len > 256*1024) { /* __get_free_pages() limit */
404 return mmu_get_scsi_one(va, len, sdev->bus);
407 void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t ba, size_t n, int direction)
409 mmu_release_scsi_one(ba, n, sdev->bus);
412 int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
414 mmu_get_scsi_sgl(sg, n, sdev->bus);
417 * XXX sparc64 can return a partial length here. sun4c should do this
418 * but it currently panics if it can't fulfill the request - Anton
423 void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
425 mmu_release_scsi_sgl(sg, n, sdev->bus);
430 void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
434 struct resource *res;
436 /* We do not need the resource, just print a message if invalid. */
437 res = _sparc_find_resource(&_sparc_dvma, ba);
439 panic("sbus_dma_sync_single: 0x%x\n", ba);
441 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
443 * XXX This bogosity will be fixed with the iommu rewrite coming soon
444 * to a kernel near you. - Anton
446 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
450 void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
454 struct resource *res;
456 /* We do not need the resource, just print a message if invalid. */
457 res = _sparc_find_resource(&_sparc_dvma, ba);
459 panic("sbus_dma_sync_single: 0x%x\n", ba);
461 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
463 * XXX This bogosity will be fixed with the iommu rewrite coming soon
464 * to a kernel near you. - Anton
466 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
470 void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
472 printk("sbus_dma_sync_sg_for_cpu: not implemented yet\n");
475 void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
477 printk("sbus_dma_sync_sg_for_device: not implemented yet\n");
480 /* Support code for sbus_init(). */
482 * XXX This functions appears to be a distorted version of
483 * prom_sbus_ranges_init(), with all sun4d stuff cut away.
484 * Ask DaveM what is going on here, how is sun4d supposed to work... XXX
486 /* added back sun4d patch from Thomas Bogendoerfer - should be OK (crn) */
487 void __init sbus_arch_bus_ranges_init(struct device_node *pn, struct sbus_bus *sbus)
489 int parent_node = pn->node;
491 if (sparc_cpu_model == sun4d) {
492 struct linux_prom_ranges iounit_ranges[PROMREG_MAX];
493 int num_iounit_ranges, len;
495 len = prom_getproperty(parent_node, "ranges",
496 (char *) iounit_ranges,
497 sizeof (iounit_ranges));
500 (len / sizeof(struct linux_prom_ranges));
501 prom_adjust_ranges(sbus->sbus_ranges,
502 sbus->num_sbus_ranges,
503 iounit_ranges, num_iounit_ranges);
508 void __init sbus_setup_iommu(struct sbus_bus *sbus, struct device_node *dp)
511 struct device_node *parent = dp->parent;
513 if (sparc_cpu_model != sun4d &&
515 !strcmp(parent->name, "iommu")) {
516 extern void iommu_init(int iommu_node, struct sbus_bus *sbus);
518 iommu_init(parent->node, sbus);
521 if (sparc_cpu_model == sun4d) {
522 extern void iounit_init(int sbi_node, int iounit_node,
523 struct sbus_bus *sbus);
525 iounit_init(dp->node, parent->node, sbus);
530 void __init sbus_setup_arch_props(struct sbus_bus *sbus, struct device_node *dp)
532 if (sparc_cpu_model == sun4d) {
533 struct device_node *parent = dp->parent;
535 sbus->devid = of_getintprop_default(parent, "device-id", 0);
536 sbus->board = of_getintprop_default(parent, "board#", 0);
540 int __init sbus_arch_preinit(void)
542 extern void register_proc_sparc_ioport(void);
544 register_proc_sparc_ioport();
548 extern void sun4_dvma_init(void);
557 void __init sbus_arch_postinit(void)
559 if (sparc_cpu_model == sun4d) {
560 extern void sun4d_init_sbi_irq(void);
561 sun4d_init_sbi_irq();
564 #endif /* CONFIG_SBUS */
568 /* Allocate and map kernel buffer using consistent mode DMA for a device.
569 * hwdev should be valid struct pci_dev pointer for PCI devices.
571 void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba)
573 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
575 struct resource *res;
581 if (len > 256*1024) { /* __get_free_pages() limit */
585 order = get_order(len_total);
586 va = __get_free_pages(GFP_KERNEL, order);
588 printk("pci_alloc_consistent: no %ld pages\n", len_total>>PAGE_SHIFT);
592 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
593 free_pages(va, order);
594 printk("pci_alloc_consistent: no core\n");
598 if (allocate_resource(&_sparc_dvma, res, len_total,
599 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
600 printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
601 free_pages(va, order);
605 mmu_inval_dma_area(va, len_total);
607 /* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %lx\n",
608 (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
610 sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
612 *pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
613 return (void *) res->start;
616 /* Free and unmap a consistent DMA buffer.
617 * cpu_addr is what was returned from pci_alloc_consistent,
618 * size must be the same as what as passed into pci_alloc_consistent,
619 * and likewise dma_addr must be the same as what *dma_addrp was set to.
621 * References to the memory and mappings associated with cpu_addr/dma_addr
622 * past this call are illegal.
624 void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba)
626 struct resource *res;
629 if ((res = _sparc_find_resource(&_sparc_dvma,
630 (unsigned long)p)) == NULL) {
631 printk("pci_free_consistent: cannot free %p\n", p);
635 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
636 printk("pci_free_consistent: unaligned va %p\n", p);
640 n = (n + PAGE_SIZE-1) & PAGE_MASK;
641 if ((res->end-res->start)+1 != n) {
642 printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
643 (long)((res->end-res->start)+1), (long)n);
647 pgp = (unsigned long) phys_to_virt(ba); /* bus_to_virt actually */
648 mmu_inval_dma_area(pgp, n);
649 sparc_unmapiorange((unsigned long)p, n);
651 release_resource(res);
654 free_pages(pgp, get_order(n));
657 /* Map a single buffer of the indicated size for DMA in streaming mode.
658 * The 32-bit bus address to use is returned.
660 * Once the device is given the dma address, the device owns this memory
661 * until either pci_unmap_single or pci_dma_sync_single_* is performed.
663 dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
666 BUG_ON(direction == PCI_DMA_NONE);
667 /* IIep is write-through, not flushing. */
668 return virt_to_phys(ptr);
671 /* Unmap a single streaming mode DMA translation. The dma_addr and size
672 * must match what was provided for in a previous pci_map_single call. All
673 * other usages are undefined.
675 * After this call, reads by the cpu to the buffer are guaranteed to see
676 * whatever the device wrote there.
678 void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size,
681 BUG_ON(direction == PCI_DMA_NONE);
682 if (direction != PCI_DMA_TODEVICE) {
683 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
684 (size + PAGE_SIZE-1) & PAGE_MASK);
689 * Same as pci_map_single, but with pages.
691 dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
692 unsigned long offset, size_t size, int direction)
694 BUG_ON(direction == PCI_DMA_NONE);
695 /* IIep is write-through, not flushing. */
696 return page_to_phys(page) + offset;
699 void pci_unmap_page(struct pci_dev *hwdev,
700 dma_addr_t dma_address, size_t size, int direction)
702 BUG_ON(direction == PCI_DMA_NONE);
703 /* mmu_inval_dma_area XXX */
706 /* Map a set of buffers described by scatterlist in streaming
707 * mode for DMA. This is the scather-gather version of the
708 * above pci_map_single interface. Here the scatter gather list
709 * elements are each tagged with the appropriate dma address
710 * and length. They are obtained via sg_dma_{address,length}(SG).
712 * NOTE: An implementation may be able to use a smaller number of
713 * DMA address/length pairs than there are SG table elements.
714 * (for example via virtual mapping capabilities)
715 * The routine returns the number of addr/length pairs actually
716 * used, at most nents.
718 * Device ownership issues as mentioned above for pci_map_single are
721 int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
724 struct scatterlist *sg;
727 BUG_ON(direction == PCI_DMA_NONE);
728 /* IIep is write-through, not flushing. */
729 for_each_sg(sgl, sg, nents, n) {
730 BUG_ON(page_address(sg_page(sg)) == NULL);
731 sg->dvma_address = virt_to_phys(sg_virt(sg));
732 sg->dvma_length = sg->length;
737 /* Unmap a set of streaming mode DMA translations.
738 * Again, cpu read rules concerning calls here are the same as for
739 * pci_unmap_single() above.
741 void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
744 struct scatterlist *sg;
747 BUG_ON(direction == PCI_DMA_NONE);
748 if (direction != PCI_DMA_TODEVICE) {
749 for_each_sg(sgl, sg, nents, n) {
750 BUG_ON(page_address(sg_page(sg)) == NULL);
752 (unsigned long) page_address(sg_page(sg)),
753 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
758 /* Make physical memory consistent for a single
759 * streaming mode DMA translation before or after a transfer.
761 * If you perform a pci_map_single() but wish to interrogate the
762 * buffer using the cpu, yet do not wish to teardown the PCI dma
763 * mapping, you must call this function before doing so. At the
764 * next point you give the PCI dma address back to the card, you
765 * must first perform a pci_dma_sync_for_device, and then the
766 * device again owns the buffer.
768 void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
770 BUG_ON(direction == PCI_DMA_NONE);
771 if (direction != PCI_DMA_TODEVICE) {
772 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
773 (size + PAGE_SIZE-1) & PAGE_MASK);
777 void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
779 BUG_ON(direction == PCI_DMA_NONE);
780 if (direction != PCI_DMA_TODEVICE) {
781 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
782 (size + PAGE_SIZE-1) & PAGE_MASK);
786 /* Make physical memory consistent for a set of streaming
787 * mode DMA translations after a transfer.
789 * The same as pci_dma_sync_single_* but for a scatter-gather list,
790 * same rules and usage.
792 void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
794 struct scatterlist *sg;
797 BUG_ON(direction == PCI_DMA_NONE);
798 if (direction != PCI_DMA_TODEVICE) {
799 for_each_sg(sgl, sg, nents, n) {
800 BUG_ON(page_address(sg_page(sg)) == NULL);
802 (unsigned long) page_address(sg_page(sg)),
803 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
808 void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
810 struct scatterlist *sg;
813 BUG_ON(direction == PCI_DMA_NONE);
814 if (direction != PCI_DMA_TODEVICE) {
815 for_each_sg(sgl, sg, nents, n) {
816 BUG_ON(page_address(sg_page(sg)) == NULL);
818 (unsigned long) page_address(sg_page(sg)),
819 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
823 #endif /* CONFIG_PCI */
825 #ifdef CONFIG_PROC_FS
828 _sparc_io_get_info(char *buf, char **start, off_t fpos, int length, int *eof,
831 char *p = buf, *e = buf + length;
835 for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
836 if (p + 32 >= e) /* Better than nothing */
838 if ((nm = r->name) == 0) nm = "???";
839 p += sprintf(p, "%016llx-%016llx: %s\n",
840 (unsigned long long)r->start,
841 (unsigned long long)r->end, nm);
847 #endif /* CONFIG_PROC_FS */
850 * This is a version of find_resource and it belongs to kernel/resource.c.
851 * Until we have agreement with Linus and Martin, it lingers here.
853 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
854 * This probably warrants some sort of hashing.
857 _sparc_find_resource(struct resource *root, unsigned long hit)
859 struct resource *tmp;
861 for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
862 if (tmp->start <= hit && tmp->end >= hit)
868 void register_proc_sparc_ioport(void)
870 #ifdef CONFIG_PROC_FS
871 create_proc_read_entry("io_map",0,NULL,_sparc_io_get_info,&sparc_iomap);
872 create_proc_read_entry("dvma_map",0,NULL,_sparc_io_get_info,&_sparc_dvma);