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>
39 #include <linux/of_device.h>
42 #include <asm/vaddrs.h>
43 #include <asm/oplib.h>
47 #include <asm/pgalloc.h>
50 #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
52 static struct resource *_sparc_find_resource(struct resource *r,
55 static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
56 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
57 unsigned long size, char *name);
58 static void _sparc_free_io(struct resource *res);
60 static void register_proc_sparc_ioport(void);
62 /* This points to the next to use virtual memory for DVMA mappings */
63 static struct resource _sparc_dvma = {
64 .name = "sparc_dvma", .start = DVMA_VADDR, .end = DVMA_END - 1
66 /* This points to the start of I/O mappings, cluable from outside. */
67 /*ext*/ struct resource sparc_iomap = {
68 .name = "sparc_iomap", .start = IOBASE_VADDR, .end = IOBASE_END - 1
72 * Our mini-allocator...
73 * Boy this is gross! We need it because we must map I/O for
74 * timers and interrupt controller before the kmalloc is available.
78 #define XNRES 10 /* SS-10 uses 8 */
81 struct resource xres; /* Must be first */
82 int xflag; /* 1 == used */
86 static struct xresource xresv[XNRES];
88 static struct xresource *xres_alloc(void) {
89 struct xresource *xrp;
93 for (n = 0; n < XNRES; n++) {
94 if (xrp->xflag == 0) {
103 static void xres_free(struct xresource *xrp) {
108 * These are typically used in PCI drivers
109 * which are trying to be cross-platform.
111 * Bus type is always zero on IIep.
113 void __iomem *ioremap(unsigned long offset, unsigned long size)
117 sprintf(name, "phys_%08x", (u32)offset);
118 return _sparc_alloc_io(0, offset, size, name);
122 * Comlimentary to ioremap().
124 void iounmap(volatile void __iomem *virtual)
126 unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
127 struct resource *res;
129 if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {
130 printk("free_io/iounmap: cannot free %lx\n", vaddr);
135 if ((char *)res >= (char*)xresv && (char *)res < (char *)&xresv[XNRES]) {
136 xres_free((struct xresource *)res);
144 void __iomem *sbus_ioremap(struct resource *phyres, unsigned long offset,
145 unsigned long size, char *name)
147 return _sparc_alloc_io(phyres->flags & 0xF,
148 phyres->start + offset, size, name);
151 void __iomem *of_ioremap(struct resource *res, unsigned long offset,
152 unsigned long size, char *name)
154 return _sparc_alloc_io(res->flags & 0xF,
158 EXPORT_SYMBOL(of_ioremap);
160 void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
164 EXPORT_SYMBOL(of_iounmap);
168 void sbus_iounmap(volatile void __iomem *addr, unsigned long size)
176 static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
177 unsigned long size, char *name)
179 static int printed_full;
180 struct xresource *xres;
181 struct resource *res;
184 void __iomem *va; /* P3 diag */
186 if (name == NULL) name = "???";
188 if ((xres = xres_alloc()) != 0) {
193 printk("ioremap: done with statics, switching to malloc\n");
197 tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
198 if (tack == NULL) return NULL;
199 memset(tack, 0, sizeof(struct resource));
200 res = (struct resource *) tack;
201 tack += sizeof (struct resource);
204 strlcpy(tack, name, XNMLN+1);
207 va = _sparc_ioremap(res, busno, phys, size);
208 /* printk("ioremap(0x%x:%08lx[0x%lx])=%p\n", busno, phys, size, va); */ /* P3 diag */
214 static void __iomem *
215 _sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz)
217 unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
219 if (allocate_resource(&sparc_iomap, res,
220 (offset + sz + PAGE_SIZE-1) & PAGE_MASK,
221 sparc_iomap.start, sparc_iomap.end, PAGE_SIZE, NULL, NULL) != 0) {
222 /* Usually we cannot see printks in this case. */
223 prom_printf("alloc_io_res(%s): cannot occupy\n",
224 (res->name != NULL)? res->name: "???");
229 sparc_mapiorange(bus, pa, res->start, res->end - res->start + 1);
231 return (void __iomem *)(unsigned long)(res->start + offset);
235 * Comlimentary to _sparc_ioremap().
237 static void _sparc_free_io(struct resource *res)
241 plen = res->end - res->start + 1;
242 BUG_ON((plen & (PAGE_SIZE-1)) != 0);
243 sparc_unmapiorange(res->start, plen);
244 release_resource(res);
249 void sbus_set_sbus64(struct sbus_dev *sdev, int x)
251 printk("sbus_set_sbus64: unsupported\n");
254 extern unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq);
255 void __init sbus_fill_device_irq(struct sbus_dev *sdev)
257 struct linux_prom_irqs irqs[PROMINTR_MAX];
260 len = prom_getproperty(sdev->prom_node, "intr",
261 (char *)irqs, sizeof(irqs));
263 sdev->num_irqs = len / 8;
264 if (sdev->num_irqs == 0) {
266 } else if (sparc_cpu_model == sun4d) {
267 for (len = 0; len < sdev->num_irqs; len++)
269 sun4d_build_irq(sdev, irqs[len].pri);
271 for (len = 0; len < sdev->num_irqs; len++)
272 sdev->irqs[len] = irqs[len].pri;
275 int interrupts[PROMINTR_MAX];
277 /* No "intr" node found-- check for "interrupts" node.
278 * This node contains SBus interrupt levels, not IPLs
279 * as in "intr", and no vector values. We convert
280 * SBus interrupt levels to PILs (platform specific).
282 len = prom_getproperty(sdev->prom_node, "interrupts",
283 (char *)interrupts, sizeof(interrupts));
288 sdev->num_irqs = len / sizeof(int);
289 for (len = 0; len < sdev->num_irqs; len++) {
291 sbint_to_irq(sdev, interrupts[len]);
298 * Allocate a chunk of memory suitable for DMA.
299 * Typically devices use them for control blocks.
300 * CPU may access them without any explicit flushing.
302 * XXX Some clever people know that sdev is not used and supply NULL. Watch.
304 void *sbus_alloc_consistent(struct sbus_dev *sdev, long len, u32 *dma_addrp)
306 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
308 struct resource *res;
311 /* XXX why are some lengths signed, others unsigned? */
315 /* XXX So what is maxphys for us and how do drivers know it? */
316 if (len > 256*1024) { /* __get_free_pages() limit */
320 order = get_order(len_total);
321 if ((va = __get_free_pages(GFP_KERNEL|__GFP_COMP, order)) == 0)
324 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL)
327 if (allocate_resource(&_sparc_dvma, res, len_total,
328 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
329 printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
332 mmu_inval_dma_area(va, len_total);
333 // XXX The mmu_map_dma_area does this for us below, see comments.
334 // sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
336 * XXX That's where sdev would be used. Currently we load
337 * all iommu tables with the same translations.
339 if (mmu_map_dma_area(dma_addrp, va, res->start, len_total) != 0)
342 /* Set the resource name, if known. */
344 res->name = sdev->prom_name;
347 return (void *)(unsigned long)res->start;
350 release_resource(res);
352 free_pages(va, order);
359 void sbus_free_consistent(struct sbus_dev *sdev, long n, void *p, u32 ba)
361 struct resource *res;
364 if ((res = _sparc_find_resource(&_sparc_dvma,
365 (unsigned long)p)) == NULL) {
366 printk("sbus_free_consistent: cannot free %p\n", p);
370 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
371 printk("sbus_free_consistent: unaligned va %p\n", p);
375 n = (n + PAGE_SIZE-1) & PAGE_MASK;
376 if ((res->end-res->start)+1 != n) {
377 printk("sbus_free_consistent: region 0x%lx asked 0x%lx\n",
378 (long)((res->end-res->start)+1), n);
382 release_resource(res);
385 /* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
386 pgv = mmu_translate_dvma(ba);
387 mmu_unmap_dma_area(ba, n);
389 __free_pages(pgv, get_order(n));
393 * Map a chunk of memory so that devices can see it.
394 * CPU view of this memory may be inconsistent with
395 * a device view and explicit flushing is necessary.
397 dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *va, size_t len, int direction)
399 /* XXX why are some lengths signed, others unsigned? */
403 /* XXX So what is maxphys for us and how do drivers know it? */
404 if (len > 256*1024) { /* __get_free_pages() limit */
407 return mmu_get_scsi_one(va, len, sdev->bus);
410 void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t ba, size_t n, int direction)
412 mmu_release_scsi_one(ba, n, sdev->bus);
415 int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
417 mmu_get_scsi_sgl(sg, n, sdev->bus);
420 * XXX sparc64 can return a partial length here. sun4c should do this
421 * but it currently panics if it can't fulfill the request - Anton
426 void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
428 mmu_release_scsi_sgl(sg, n, sdev->bus);
433 void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
437 struct resource *res;
439 /* We do not need the resource, just print a message if invalid. */
440 res = _sparc_find_resource(&_sparc_dvma, ba);
442 panic("sbus_dma_sync_single: 0x%x\n", ba);
444 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
446 * XXX This bogosity will be fixed with the iommu rewrite coming soon
447 * to a kernel near you. - Anton
449 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
453 void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
457 struct resource *res;
459 /* We do not need the resource, just print a message if invalid. */
460 res = _sparc_find_resource(&_sparc_dvma, ba);
462 panic("sbus_dma_sync_single: 0x%x\n", ba);
464 va = page_address(mmu_translate_dvma(ba)); /* XXX higmem */
466 * XXX This bogosity will be fixed with the iommu rewrite coming soon
467 * to a kernel near you. - Anton
469 /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
473 void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
475 printk("sbus_dma_sync_sg_for_cpu: not implemented yet\n");
478 void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
480 printk("sbus_dma_sync_sg_for_device: not implemented yet\n");
483 /* Support code for sbus_init(). */
485 * XXX This functions appears to be a distorted version of
486 * prom_sbus_ranges_init(), with all sun4d stuff cut away.
487 * Ask DaveM what is going on here, how is sun4d supposed to work... XXX
489 /* added back sun4d patch from Thomas Bogendoerfer - should be OK (crn) */
490 void __init sbus_arch_bus_ranges_init(struct device_node *pn, struct sbus_bus *sbus)
492 int parent_node = pn->node;
494 if (sparc_cpu_model == sun4d) {
495 struct linux_prom_ranges iounit_ranges[PROMREG_MAX];
496 int num_iounit_ranges, len;
498 len = prom_getproperty(parent_node, "ranges",
499 (char *) iounit_ranges,
500 sizeof (iounit_ranges));
503 (len / sizeof(struct linux_prom_ranges));
504 prom_adjust_ranges(sbus->sbus_ranges,
505 sbus->num_sbus_ranges,
506 iounit_ranges, num_iounit_ranges);
511 void __init sbus_setup_iommu(struct sbus_bus *sbus, struct device_node *dp)
514 struct device_node *parent = dp->parent;
516 if (sparc_cpu_model != sun4d &&
518 !strcmp(parent->name, "iommu")) {
519 extern void iommu_init(int iommu_node, struct sbus_bus *sbus);
521 iommu_init(parent->node, sbus);
524 if (sparc_cpu_model == sun4d) {
525 extern void iounit_init(int sbi_node, int iounit_node,
526 struct sbus_bus *sbus);
528 iounit_init(dp->node, parent->node, sbus);
533 void __init sbus_setup_arch_props(struct sbus_bus *sbus, struct device_node *dp)
535 if (sparc_cpu_model == sun4d) {
536 struct device_node *parent = dp->parent;
538 sbus->devid = of_getintprop_default(parent, "device-id", 0);
539 sbus->board = of_getintprop_default(parent, "board#", 0);
543 int __init sbus_arch_preinit(void)
545 register_proc_sparc_ioport();
549 extern void sun4_dvma_init(void);
558 void __init sbus_arch_postinit(void)
560 if (sparc_cpu_model == sun4d) {
561 extern void sun4d_init_sbi_irq(void);
562 sun4d_init_sbi_irq();
565 #endif /* CONFIG_SBUS */
569 /* Allocate and map kernel buffer using consistent mode DMA for a device.
570 * hwdev should be valid struct pci_dev pointer for PCI devices.
572 void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba)
574 unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
576 struct resource *res;
582 if (len > 256*1024) { /* __get_free_pages() limit */
586 order = get_order(len_total);
587 va = __get_free_pages(GFP_KERNEL, order);
589 printk("pci_alloc_consistent: no %ld pages\n", len_total>>PAGE_SHIFT);
593 if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
594 free_pages(va, order);
595 printk("pci_alloc_consistent: no core\n");
599 if (allocate_resource(&_sparc_dvma, res, len_total,
600 _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
601 printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
602 free_pages(va, order);
606 mmu_inval_dma_area(va, len_total);
608 /* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %lx\n",
609 (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
611 sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
613 *pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
614 return (void *) res->start;
617 /* Free and unmap a consistent DMA buffer.
618 * cpu_addr is what was returned from pci_alloc_consistent,
619 * size must be the same as what as passed into pci_alloc_consistent,
620 * and likewise dma_addr must be the same as what *dma_addrp was set to.
622 * References to the memory and mappings associated with cpu_addr/dma_addr
623 * past this call are illegal.
625 void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba)
627 struct resource *res;
630 if ((res = _sparc_find_resource(&_sparc_dvma,
631 (unsigned long)p)) == NULL) {
632 printk("pci_free_consistent: cannot free %p\n", p);
636 if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
637 printk("pci_free_consistent: unaligned va %p\n", p);
641 n = (n + PAGE_SIZE-1) & PAGE_MASK;
642 if ((res->end-res->start)+1 != n) {
643 printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
644 (long)((res->end-res->start)+1), (long)n);
648 pgp = (unsigned long) phys_to_virt(ba); /* bus_to_virt actually */
649 mmu_inval_dma_area(pgp, n);
650 sparc_unmapiorange((unsigned long)p, n);
652 release_resource(res);
655 free_pages(pgp, get_order(n));
658 /* Map a single buffer of the indicated size for DMA in streaming mode.
659 * The 32-bit bus address to use is returned.
661 * Once the device is given the dma address, the device owns this memory
662 * until either pci_unmap_single or pci_dma_sync_single_* is performed.
664 dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
667 BUG_ON(direction == PCI_DMA_NONE);
668 /* IIep is write-through, not flushing. */
669 return virt_to_phys(ptr);
672 /* Unmap a single streaming mode DMA translation. The dma_addr and size
673 * must match what was provided for in a previous pci_map_single call. All
674 * other usages are undefined.
676 * After this call, reads by the cpu to the buffer are guaranteed to see
677 * whatever the device wrote there.
679 void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size,
682 BUG_ON(direction == PCI_DMA_NONE);
683 if (direction != PCI_DMA_TODEVICE) {
684 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
685 (size + PAGE_SIZE-1) & PAGE_MASK);
690 * Same as pci_map_single, but with pages.
692 dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
693 unsigned long offset, size_t size, int direction)
695 BUG_ON(direction == PCI_DMA_NONE);
696 /* IIep is write-through, not flushing. */
697 return page_to_phys(page) + offset;
700 void pci_unmap_page(struct pci_dev *hwdev,
701 dma_addr_t dma_address, size_t size, int direction)
703 BUG_ON(direction == PCI_DMA_NONE);
704 /* mmu_inval_dma_area XXX */
707 /* Map a set of buffers described by scatterlist in streaming
708 * mode for DMA. This is the scather-gather version of the
709 * above pci_map_single interface. Here the scatter gather list
710 * elements are each tagged with the appropriate dma address
711 * and length. They are obtained via sg_dma_{address,length}(SG).
713 * NOTE: An implementation may be able to use a smaller number of
714 * DMA address/length pairs than there are SG table elements.
715 * (for example via virtual mapping capabilities)
716 * The routine returns the number of addr/length pairs actually
717 * used, at most nents.
719 * Device ownership issues as mentioned above for pci_map_single are
722 int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
725 struct scatterlist *sg;
728 BUG_ON(direction == PCI_DMA_NONE);
729 /* IIep is write-through, not flushing. */
730 for_each_sg(sgl, sg, nents, n) {
731 BUG_ON(page_address(sg_page(sg)) == NULL);
732 sg->dvma_address = virt_to_phys(sg_virt(sg));
733 sg->dvma_length = sg->length;
738 /* Unmap a set of streaming mode DMA translations.
739 * Again, cpu read rules concerning calls here are the same as for
740 * pci_unmap_single() above.
742 void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
745 struct scatterlist *sg;
748 BUG_ON(direction == PCI_DMA_NONE);
749 if (direction != PCI_DMA_TODEVICE) {
750 for_each_sg(sgl, sg, nents, n) {
751 BUG_ON(page_address(sg_page(sg)) == NULL);
753 (unsigned long) page_address(sg_page(sg)),
754 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
759 /* Make physical memory consistent for a single
760 * streaming mode DMA translation before or after a transfer.
762 * If you perform a pci_map_single() but wish to interrogate the
763 * buffer using the cpu, yet do not wish to teardown the PCI dma
764 * mapping, you must call this function before doing so. At the
765 * next point you give the PCI dma address back to the card, you
766 * must first perform a pci_dma_sync_for_device, and then the
767 * device again owns the buffer.
769 void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
771 BUG_ON(direction == PCI_DMA_NONE);
772 if (direction != PCI_DMA_TODEVICE) {
773 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
774 (size + PAGE_SIZE-1) & PAGE_MASK);
778 void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
780 BUG_ON(direction == PCI_DMA_NONE);
781 if (direction != PCI_DMA_TODEVICE) {
782 mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
783 (size + PAGE_SIZE-1) & PAGE_MASK);
787 /* Make physical memory consistent for a set of streaming
788 * mode DMA translations after a transfer.
790 * The same as pci_dma_sync_single_* but for a scatter-gather list,
791 * same rules and usage.
793 void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
795 struct scatterlist *sg;
798 BUG_ON(direction == PCI_DMA_NONE);
799 if (direction != PCI_DMA_TODEVICE) {
800 for_each_sg(sgl, sg, nents, n) {
801 BUG_ON(page_address(sg_page(sg)) == NULL);
803 (unsigned long) page_address(sg_page(sg)),
804 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
809 void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction)
811 struct scatterlist *sg;
814 BUG_ON(direction == PCI_DMA_NONE);
815 if (direction != PCI_DMA_TODEVICE) {
816 for_each_sg(sgl, sg, nents, n) {
817 BUG_ON(page_address(sg_page(sg)) == NULL);
819 (unsigned long) page_address(sg_page(sg)),
820 (sg->length + PAGE_SIZE-1) & PAGE_MASK);
824 #endif /* CONFIG_PCI */
826 #ifdef CONFIG_PROC_FS
829 _sparc_io_get_info(char *buf, char **start, off_t fpos, int length, int *eof,
832 char *p = buf, *e = buf + length;
836 for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
837 if (p + 32 >= e) /* Better than nothing */
839 if ((nm = r->name) == 0) nm = "???";
840 p += sprintf(p, "%016llx-%016llx: %s\n",
841 (unsigned long long)r->start,
842 (unsigned long long)r->end, nm);
848 #endif /* CONFIG_PROC_FS */
851 * This is a version of find_resource and it belongs to kernel/resource.c.
852 * Until we have agreement with Linus and Martin, it lingers here.
854 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
855 * This probably warrants some sort of hashing.
857 static struct resource *_sparc_find_resource(struct resource *root,
860 struct resource *tmp;
862 for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
863 if (tmp->start <= hit && tmp->end >= hit)
869 static void register_proc_sparc_ioport(void)
871 #ifdef CONFIG_PROC_FS
872 create_proc_read_entry("io_map",0,NULL,_sparc_io_get_info,&sparc_iomap);
873 create_proc_read_entry("dvma_map",0,NULL,_sparc_io_get_info,&_sparc_dvma);