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>
40 #include <asm/vaddrs.h>
41 #include <asm/oplib.h>
43 #include <asm/of_device.h>
46 #include <asm/pgalloc.h>
49 #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
51 struct resource *_sparc_find_resource(struct resource *r, unsigned long);
53 static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
54 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
55 unsigned long size, char *name);
56 static void _sparc_free_io(struct resource *res);
58 /* This points to the next to use virtual memory for DVMA mappings */
59 static struct resource _sparc_dvma = {
60 .name = "sparc_dvma", .start = DVMA_VADDR, .end = DVMA_END - 1
62 /* This points to the start of I/O mappings, cluable from outside. */
63 /*ext*/ struct resource sparc_iomap = {
64 .name = "sparc_iomap", .start = IOBASE_VADDR, .end = IOBASE_END - 1
68 * Our mini-allocator...
69 * Boy this is gross! We need it because we must map I/O for
70 * timers and interrupt controller before the kmalloc is available.
74 #define XNRES 10 /* SS-10 uses 8 */
77 struct resource xres; /* Must be first */
78 int xflag; /* 1 == used */
82 static struct xresource xresv[XNRES];
84 static struct xresource *xres_alloc(void) {
85 struct xresource *xrp;
89 for (n = 0; n < XNRES; n++) {
90 if (xrp->xflag == 0) {
99 static void xres_free(struct xresource *xrp) {
104 * These are typically used in PCI drivers
105 * which are trying to be cross-platform.
107 * Bus type is always zero on IIep.
109 void __iomem *ioremap(unsigned long offset, unsigned long size)
113 sprintf(name, "phys_%08x", (u32)offset);
114 return _sparc_alloc_io(0, offset, size, name);
118 * Comlimentary to ioremap().
120 void iounmap(volatile void __iomem *virtual)
122 unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
123 struct resource *res;
125 if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {
126 printk("free_io/iounmap: cannot free %lx\n", vaddr);
131 if ((char *)res >= (char*)xresv && (char *)res < (char *)&xresv[XNRES]) {
132 xres_free((struct xresource *)res);
140 void __iomem *sbus_ioremap(struct resource *phyres, unsigned long offset,
141 unsigned long size, char *name)
143 return _sparc_alloc_io(phyres->flags & 0xF,
144 phyres->start + offset, size, name);
147 void __iomem *of_ioremap(struct resource *res, unsigned long offset,
148 unsigned long size, char *name)
150 return _sparc_alloc_io(res->flags & 0xF,
154 EXPORT_SYMBOL(of_ioremap);
156 void of_iounmap(void __iomem *base, unsigned long size)
160 EXPORT_SYMBOL(of_iounmap);
164 void sbus_iounmap(volatile void __iomem *addr, unsigned long size)
172 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
173 unsigned long size, char *name)
175 static int printed_full;
176 struct xresource *xres;
177 struct resource *res;
180 void __iomem *va; /* P3 diag */
182 if (name == NULL) name = "???";
184 if ((xres = xres_alloc()) != 0) {
189 printk("ioremap: done with statics, switching to malloc\n");
193 tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
194 if (tack == NULL) return NULL;
195 memset(tack, 0, sizeof(struct resource));
196 res = (struct resource *) tack;
197 tack += sizeof (struct resource);
200 strlcpy(tack, name, XNMLN+1);
203 va = _sparc_ioremap(res, busno, phys, size);
204 /* printk("ioremap(0x%x:%08lx[0x%lx])=%p\n", busno, phys, size, va); */ /* P3 diag */
210 static void __iomem *
211 _sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz)
213 unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
215 if (allocate_resource(&sparc_iomap, res,
216 (offset + sz + PAGE_SIZE-1) & PAGE_MASK,
217 sparc_iomap.start, sparc_iomap.end, PAGE_SIZE, NULL, NULL) != 0) {
218 /* Usually we cannot see printks in this case. */
219 prom_printf("alloc_io_res(%s): cannot occupy\n",
220 (res->name != NULL)? res->name: "???");
225 sparc_mapiorange(bus, pa, res->start, res->end - res->start + 1);
227 return (void __iomem *)(unsigned long)(res->start + offset);
231 * Comlimentary to _sparc_ioremap().
233 static void _sparc_free_io(struct resource *res)
237 plen = res->end - res->start + 1;
238 BUG_ON((plen & (PAGE_SIZE-1)) != 0);
239 sparc_unmapiorange(res->start, plen);
240 release_resource(res);
245 void sbus_set_sbus64(struct sbus_dev *sdev, int x)
247 printk("sbus_set_sbus64: unsupported\n");
250 extern unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq);
251 void __init sbus_fill_device_irq(struct sbus_dev *sdev)
253 struct linux_prom_irqs irqs[PROMINTR_MAX];
256 len = prom_getproperty(sdev->prom_node, "intr",
257 (char *)irqs, sizeof(irqs));
259 sdev->num_irqs = len / 8;
260 if (sdev->num_irqs == 0) {
262 } else if (sparc_cpu_model == sun4d) {
263 for (len = 0; len < sdev->num_irqs; len++)
265 sun4d_build_irq(sdev, irqs[len].pri);
267 for (len = 0; len < sdev->num_irqs; len++)
268 sdev->irqs[len] = irqs[len].pri;
271 int interrupts[PROMINTR_MAX];
273 /* No "intr" node found-- check for "interrupts" node.
274 * This node contains SBus interrupt levels, not IPLs
275 * as in "intr", and no vector values. We convert
276 * SBus interrupt levels to PILs (platform specific).
278 len = prom_getproperty(sdev->prom_node, "interrupts",
279 (char *)interrupts, sizeof(interrupts));
284 sdev->num_irqs = len / sizeof(int);
285 for (len = 0; len < sdev->num_irqs; len++) {
287 sbint_to_irq(sdev, interrupts[len]);
294 * Allocate a chunk of memory suitable for DMA.
295 * Typically devices use them for control blocks.
296 * CPU may access them without any explicit flushing.
298 * XXX Some clever people know that sdev is not used and supply NULL. Watch.
300 void *sbus_alloc_consistent(struct sbus_dev *sdev, long len, u32 *dma_addrp)
302 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
304 struct resource *res;
307 /* XXX why are some lenghts signed, others unsigned? */
311 /* XXX So what is maxphys for us and how do drivers know it? */
312 if (len > 256*1024) { /* __get_free_pages() limit */
316 order = get_order(len_total);
317 if ((va = __get_free_pages(GFP_KERNEL|__GFP_COMP, order)) == 0)
320 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL)
323 if (allocate_resource(&_sparc_dvma, res, len_total,
324 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
325 printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
328 mmu_inval_dma_area(va, len_total);
329 // XXX The mmu_map_dma_area does this for us below, see comments.
330 // sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
332 * XXX That's where sdev would be used. Currently we load
333 * all iommu tables with the same translations.
335 if (mmu_map_dma_area(dma_addrp, va, res->start, len_total) != 0)
338 /* Set the resource name, if known. */
340 res->name = sdev->prom_name;
343 return (void *)(unsigned long)res->start;
346 release_resource(res);
348 free_pages(va, order);
355 void sbus_free_consistent(struct sbus_dev *sdev, long n, void *p, u32 ba)
357 struct resource *res;
360 if ((res = _sparc_find_resource(&_sparc_dvma,
361 (unsigned long)p)) == NULL) {
362 printk("sbus_free_consistent: cannot free %p\n", p);
366 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
367 printk("sbus_free_consistent: unaligned va %p\n", p);
371 n = (n + PAGE_SIZE-1) & PAGE_MASK;
372 if ((res->end-res->start)+1 != n) {
373 printk("sbus_free_consistent: region 0x%lx asked 0x%lx\n",
374 (long)((res->end-res->start)+1), n);
378 release_resource(res);
381 /* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
382 pgv = mmu_translate_dvma(ba);
383 mmu_unmap_dma_area(ba, n);
385 __free_pages(pgv, get_order(n));
389 * Map a chunk of memory so that devices can see it.
390 * CPU view of this memory may be inconsistent with
391 * a device view and explicit flushing is necessary.
393 dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *va, size_t len, int direction)
395 /* XXX why are some lenghts signed, others unsigned? */
399 /* XXX So what is maxphys for us and how do drivers know it? */
400 if (len > 256*1024) { /* __get_free_pages() limit */
403 return mmu_get_scsi_one(va, len, sdev->bus);
406 void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t ba, size_t n, int direction)
408 mmu_release_scsi_one(ba, n, sdev->bus);
411 int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
413 mmu_get_scsi_sgl(sg, n, sdev->bus);
416 * XXX sparc64 can return a partial length here. sun4c should do this
417 * but it currently panics if it can't fulfill the request - Anton
422 void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
424 mmu_release_scsi_sgl(sg, n, sdev->bus);
429 void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
433 struct resource *res;
435 /* We do not need the resource, just print a message if invalid. */
436 res = _sparc_find_resource(&_sparc_dvma, ba);
438 panic("sbus_dma_sync_single: 0x%x\n", ba);
440 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
442 * XXX This bogosity will be fixed with the iommu rewrite coming soon
443 * to a kernel near you. - Anton
445 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
449 void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
453 struct resource *res;
455 /* We do not need the resource, just print a message if invalid. */
456 res = _sparc_find_resource(&_sparc_dvma, ba);
458 panic("sbus_dma_sync_single: 0x%x\n", ba);
460 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
462 * XXX This bogosity will be fixed with the iommu rewrite coming soon
463 * to a kernel near you. - Anton
465 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
469 void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
471 printk("sbus_dma_sync_sg_for_cpu: not implemented yet\n");
474 void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
476 printk("sbus_dma_sync_sg_for_device: not implemented yet\n");
479 /* Support code for sbus_init(). */
481 * XXX This functions appears to be a distorted version of
482 * prom_sbus_ranges_init(), with all sun4d stuff cut away.
483 * Ask DaveM what is going on here, how is sun4d supposed to work... XXX
485 /* added back sun4d patch from Thomas Bogendoerfer - should be OK (crn) */
486 void __init sbus_arch_bus_ranges_init(struct device_node *pn, struct sbus_bus *sbus)
488 int parent_node = pn->node;
490 if (sparc_cpu_model == sun4d) {
491 struct linux_prom_ranges iounit_ranges[PROMREG_MAX];
492 int num_iounit_ranges, len;
494 len = prom_getproperty(parent_node, "ranges",
495 (char *) iounit_ranges,
496 sizeof (iounit_ranges));
499 (len / sizeof(struct linux_prom_ranges));
500 prom_adjust_ranges(sbus->sbus_ranges,
501 sbus->num_sbus_ranges,
502 iounit_ranges, num_iounit_ranges);
507 void __init sbus_setup_iommu(struct sbus_bus *sbus, struct device_node *dp)
510 struct device_node *parent = dp->parent;
512 if (sparc_cpu_model != sun4d &&
514 !strcmp(parent->name, "iommu")) {
515 extern void iommu_init(int iommu_node, struct sbus_bus *sbus);
517 iommu_init(parent->node, sbus);
520 if (sparc_cpu_model == sun4d) {
521 extern void iounit_init(int sbi_node, int iounit_node,
522 struct sbus_bus *sbus);
524 iounit_init(dp->node, parent->node, sbus);
529 void __init sbus_setup_arch_props(struct sbus_bus *sbus, struct device_node *dp)
531 if (sparc_cpu_model == sun4d) {
532 struct device_node *parent = dp->parent;
534 sbus->devid = of_getintprop_default(parent, "device-id", 0);
535 sbus->board = of_getintprop_default(parent, "board#", 0);
539 int __init sbus_arch_preinit(void)
541 extern void register_proc_sparc_ioport(void);
543 register_proc_sparc_ioport();
547 extern void sun4_dvma_init(void);
556 void __init sbus_arch_postinit(void)
558 if (sparc_cpu_model == sun4d) {
559 extern void sun4d_init_sbi_irq(void);
560 sun4d_init_sbi_irq();
563 #endif /* CONFIG_SBUS */
567 /* Allocate and map kernel buffer using consistent mode DMA for a device.
568 * hwdev should be valid struct pci_dev pointer for PCI devices.
570 void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba)
572 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
574 struct resource *res;
580 if (len > 256*1024) { /* __get_free_pages() limit */
584 order = get_order(len_total);
585 va = __get_free_pages(GFP_KERNEL, order);
587 printk("pci_alloc_consistent: no %ld pages\n", len_total>>PAGE_SHIFT);
591 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
592 free_pages(va, order);
593 printk("pci_alloc_consistent: no core\n");
597 if (allocate_resource(&_sparc_dvma, res, len_total,
598 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
599 printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
600 free_pages(va, order);
604 mmu_inval_dma_area(va, len_total);
606 /* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %lx\n",
607 (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
609 sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
611 *pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
612 return (void *) res->start;
615 /* Free and unmap a consistent DMA buffer.
616 * cpu_addr is what was returned from pci_alloc_consistent,
617 * size must be the same as what as passed into pci_alloc_consistent,
618 * and likewise dma_addr must be the same as what *dma_addrp was set to.
620 * References to the memory and mappings assosciated with cpu_addr/dma_addr
621 * past this call are illegal.
623 void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba)
625 struct resource *res;
628 if ((res = _sparc_find_resource(&_sparc_dvma,
629 (unsigned long)p)) == NULL) {
630 printk("pci_free_consistent: cannot free %p\n", p);
634 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
635 printk("pci_free_consistent: unaligned va %p\n", p);
639 n = (n + PAGE_SIZE-1) & PAGE_MASK;
640 if ((res->end-res->start)+1 != n) {
641 printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
642 (long)((res->end-res->start)+1), (long)n);
646 pgp = (unsigned long) phys_to_virt(ba); /* bus_to_virt actually */
647 mmu_inval_dma_area(pgp, n);
648 sparc_unmapiorange((unsigned long)p, n);
650 release_resource(res);
653 free_pages(pgp, get_order(n));
656 /* Map a single buffer of the indicated size for DMA in streaming mode.
657 * The 32-bit bus address to use is returned.
659 * Once the device is given the dma address, the device owns this memory
660 * until either pci_unmap_single or pci_dma_sync_single_* is performed.
662 dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
665 BUG_ON(direction == PCI_DMA_NONE);
666 /* IIep is write-through, not flushing. */
667 return virt_to_phys(ptr);
670 /* Unmap a single streaming mode DMA translation. The dma_addr and size
671 * must match what was provided for in a previous pci_map_single call. All
672 * other usages are undefined.
674 * After this call, reads by the cpu to the buffer are guaranteed to see
675 * whatever the device wrote there.
677 void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size,
680 BUG_ON(direction == PCI_DMA_NONE);
681 if (direction != PCI_DMA_TODEVICE) {
682 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
683 (size + PAGE_SIZE-1) & PAGE_MASK);
688 * Same as pci_map_single, but with pages.
690 dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
691 unsigned long offset, size_t size, int direction)
693 BUG_ON(direction == PCI_DMA_NONE);
694 /* IIep is write-through, not flushing. */
695 return page_to_phys(page) + offset;
698 void pci_unmap_page(struct pci_dev *hwdev,
699 dma_addr_t dma_address, size_t size, int direction)
701 BUG_ON(direction == PCI_DMA_NONE);
702 /* mmu_inval_dma_area XXX */
705 /* Map a set of buffers described by scatterlist in streaming
706 * mode for DMA. This is the scather-gather version of the
707 * above pci_map_single interface. Here the scatter gather list
708 * elements are each tagged with the appropriate dma address
709 * and length. They are obtained via sg_dma_{address,length}(SG).
711 * NOTE: An implementation may be able to use a smaller number of
712 * DMA address/length pairs than there are SG table elements.
713 * (for example via virtual mapping capabilities)
714 * The routine returns the number of addr/length pairs actually
715 * used, at most nents.
717 * Device ownership issues as mentioned above for pci_map_single are
720 int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
725 BUG_ON(direction == PCI_DMA_NONE);
726 /* IIep is write-through, not flushing. */
727 for (n = 0; n < nents; n++) {
728 BUG_ON(page_address(sg->page) == NULL);
729 sg->dvma_address = virt_to_phys(page_address(sg->page));
730 sg->dvma_length = sg->length;
736 /* Unmap a set of streaming mode DMA translations.
737 * Again, cpu read rules concerning calls here are the same as for
738 * pci_unmap_single() above.
740 void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
745 BUG_ON(direction == PCI_DMA_NONE);
746 if (direction != PCI_DMA_TODEVICE) {
747 for (n = 0; n < nents; n++) {
748 BUG_ON(page_address(sg->page) == NULL);
750 (unsigned long) page_address(sg->page),
751 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
757 /* Make physical memory consistent for a single
758 * streaming mode DMA translation before or after a transfer.
760 * If you perform a pci_map_single() but wish to interrogate the
761 * buffer using the cpu, yet do not wish to teardown the PCI dma
762 * mapping, you must call this function before doing so. At the
763 * next point you give the PCI dma address back to the card, you
764 * must first perform a pci_dma_sync_for_device, and then the
765 * device again owns the buffer.
767 void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
769 BUG_ON(direction == PCI_DMA_NONE);
770 if (direction != PCI_DMA_TODEVICE) {
771 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
772 (size + PAGE_SIZE-1) & PAGE_MASK);
776 void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
778 BUG_ON(direction == PCI_DMA_NONE);
779 if (direction != PCI_DMA_TODEVICE) {
780 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
781 (size + PAGE_SIZE-1) & PAGE_MASK);
785 /* Make physical memory consistent for a set of streaming
786 * mode DMA translations after a transfer.
788 * The same as pci_dma_sync_single_* but for a scatter-gather list,
789 * same rules and usage.
791 void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
795 BUG_ON(direction == PCI_DMA_NONE);
796 if (direction != PCI_DMA_TODEVICE) {
797 for (n = 0; n < nents; n++) {
798 BUG_ON(page_address(sg->page) == NULL);
800 (unsigned long) page_address(sg->page),
801 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
807 void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
811 BUG_ON(direction == PCI_DMA_NONE);
812 if (direction != PCI_DMA_TODEVICE) {
813 for (n = 0; n < nents; n++) {
814 BUG_ON(page_address(sg->page) == NULL);
816 (unsigned long) page_address(sg->page),
817 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
822 #endif /* CONFIG_PCI */
824 #ifdef CONFIG_PROC_FS
827 _sparc_io_get_info(char *buf, char **start, off_t fpos, int length, int *eof,
830 char *p = buf, *e = buf + length;
834 for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
835 if (p + 32 >= e) /* Better than nothing */
837 if ((nm = r->name) == 0) nm = "???";
838 p += sprintf(p, "%016llx-%016llx: %s\n",
839 (unsigned long long)r->start,
840 (unsigned long long)r->end, nm);
846 #endif /* CONFIG_PROC_FS */
849 * This is a version of find_resource and it belongs to kernel/resource.c.
850 * Until we have agreement with Linus and Martin, it lingers here.
852 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
853 * This probably warrants some sort of hashing.
856 _sparc_find_resource(struct resource *root, unsigned long hit)
858 struct resource *tmp;
860 for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
861 if (tmp->start <= hit && tmp->end >= hit)
867 void register_proc_sparc_ioport(void)
869 #ifdef CONFIG_PROC_FS
870 create_proc_read_entry("io_map",0,NULL,_sparc_io_get_info,&sparc_iomap);
871 create_proc_read_entry("dvma_map",0,NULL,_sparc_io_get_info,&_sparc_dvma);