ioport.c
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- /* $Id: ioport.c,v 1.45 2001/10/30 04:54:21 davem Exp $
- * ioport.c: Simple io mapping allocator.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
- *
- * 1996: sparc_free_io, 1999: ioremap()/iounmap() by Pete Zaitcev.
- *
- * 2000/01/29
- * <rth> zait: as long as pci_alloc_consistent produces something addressable,
- * things are ok.
- * <zaitcev> rth: no, it is relevant, because get_free_pages returns you a
- * pointer into the big page mapping
- * <rth> zait: so what?
- * <rth> zait: remap_it_my_way(virt_to_phys(get_free_page()))
- * <zaitcev> Hmm
- * <zaitcev> Suppose I did this remap_it_my_way(virt_to_phys(get_free_page())).
- * So far so good.
- * <zaitcev> Now, driver calls pci_free_consistent(with result of
- * remap_it_my_way()).
- * <zaitcev> How do you find the address to pass to free_pages()?
- * <rth> zait: walk the page tables? It's only two or three level after all.
- * <rth> zait: you have to walk them anyway to remove the mapping.
- * <zaitcev> Hmm
- * <zaitcev> Sounds reasonable
- */
- #include <linux/config.h>
- #include <linux/sched.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
- #include <linux/types.h>
- #include <linux/ioport.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/pci.h> /* struct pci_dev */
- #include <linux/proc_fs.h>
- #include <asm/io.h>
- #include <asm/vaddrs.h>
- #include <asm/oplib.h>
- #include <asm/page.h>
- #include <asm/pgalloc.h>
- #include <asm/pgtable.h>
- #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
- struct resource *_sparc_find_resource(struct resource *r, unsigned long);
- static void *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
- static void *_sparc_alloc_io(unsigned int busno, unsigned long phys,
- unsigned long size, char *name);
- static void _sparc_free_io(struct resource *res);
- /* This points to the next to use virtual memory for DVMA mappings */
- static struct resource _sparc_dvma = {
- "sparc_dvma", DVMA_VADDR, DVMA_END - 1
- };
- /* This points to the start of I/O mappings, cluable from outside. */
- /*ext*/ struct resource sparc_iomap = {
- "sparc_iomap", IOBASE_VADDR, IOBASE_END - 1
- };
- /*
- * BTFIXUP would do as well but it seems overkill for the case.
- */
- static void (*_sparc_mapioaddr)(unsigned long pa, unsigned long va,
- int bus, int ro);
- static void (*_sparc_unmapioaddr)(unsigned long va);
- /*
- * Our mini-allocator...
- * Boy this is gross! We need it because we must map I/O for
- * timers and interrupt controller before the kmalloc is available.
- */
- #define XNMLN 15
- #define XNRES 10 /* SS-10 uses 8 */
- struct xresource {
- struct resource xres; /* Must be first */
- int xflag; /* 1 == used */
- char xname[XNMLN+1];
- };
- static struct xresource xresv[XNRES];
- static struct xresource *xres_alloc(void) {
- struct xresource *xrp;
- int n;
- xrp = xresv;
- for (n = 0; n < XNRES; n++) {
- if (xrp->xflag == 0) {
- xrp->xflag = 1;
- return xrp;
- }
- xrp++;
- }
- return NULL;
- }
- static void xres_free(struct xresource *xrp) {
- xrp->xflag = 0;
- }
- /*
- * These are typically used in PCI drivers
- * which are trying to be cross-platform.
- *
- * Bus type is always zero on IIep.
- */
- void *ioremap(unsigned long offset, unsigned long size)
- {
- char name[14];
- sprintf(name, "phys_%08x", (u32)offset);
- return _sparc_alloc_io(0, offset, size, name);
- }
- /*
- * Comlimentary to ioremap().
- */
- void iounmap(void *virtual)
- {
- unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
- struct resource *res;
- if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {
- printk("free_io/iounmap: cannot free %lxn", vaddr);
- return;
- }
- _sparc_free_io(res);
- if ((char *)res >= (char*)xresv && (char *)res < (char *)&xresv[XNRES]) {
- xres_free((struct xresource *)res);
- } else {
- kfree(res);
- }
- }
- /*
- */
- unsigned long sbus_ioremap(struct resource *phyres, unsigned long offset,
- unsigned long size, char *name)
- {
- return (unsigned long) _sparc_alloc_io(phyres->flags & 0xF,
- phyres->start + offset, size, name);
- }
- /*
- */
- void sbus_iounmap(unsigned long addr, unsigned long size)
- {
- iounmap((void *)addr);
- }
- /*
- * Meat of mapping
- */
- static void *_sparc_alloc_io(unsigned int busno, unsigned long phys,
- unsigned long size, char *name)
- {
- static int printed_full;
- struct xresource *xres;
- struct resource *res;
- char *tack;
- int tlen;
- void *va; /* P3 diag */
- if (name == NULL) name = "???";
- if ((xres = xres_alloc()) != 0) {
- tack = xres->xname;
- res = &xres->xres;
- } else {
- if (!printed_full) {
- printk("ioremap: done with statics, switching to mallocn");
- printed_full = 1;
- }
- tlen = strlen(name);
- tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
- if (tack == NULL) return NULL;
- memset(tack, 0, sizeof(struct resource));
- res = (struct resource *) tack;
- tack += sizeof (struct resource);
- }
- strncpy(tack, name, XNMLN);
- tack[XNMLN] = 0;
- res->name = tack;
- va = _sparc_ioremap(res, busno, phys, size);
- /* printk("ioremap(0x%x:%08lx[0x%lx])=%pn", busno, phys, size, va); */ /* P3 diag */
- return va;
- }
- /*
- */
- static void *
- _sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz)
- {
- unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
- unsigned long va;
- unsigned int psz;
- if (allocate_resource(&sparc_iomap, res,
- (offset + sz + PAGE_SIZE-1) & PAGE_MASK,
- sparc_iomap.start, sparc_iomap.end, PAGE_SIZE, NULL, NULL) != 0) {
- /* Usually we cannot see printks in this case. */
- prom_printf("alloc_io_res(%s): cannot occupyn",
- (res->name != NULL)? res->name: "???");
- prom_halt();
- }
- va = res->start;
- pa &= PAGE_MASK;
- for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
- (*_sparc_mapioaddr)(pa, va, bus, 0);
- va += PAGE_SIZE;
- pa += PAGE_SIZE;
- }
- /*
- * XXX Playing with implementation details here.
- * On sparc64 Ebus has resources with precise boundaries.
- * We share drivers with sparc64. Too clever drivers use
- * start of a resource instead of a base address.
- *
- * XXX-2 This may be not valid anymore, clean when
- * interface to sbus_ioremap() is resolved.
- */
- res->start += offset;
- res->end = res->start + sz - 1; /* not strictly necessary.. */
- return (void *) res->start;
- }
- /*
- * Comlimentary to _sparc_ioremap().
- */
- static void _sparc_free_io(struct resource *res)
- {
- unsigned long plen;
- plen = res->end - res->start + 1;
- plen = (plen + PAGE_SIZE-1) & PAGE_MASK;
- while (plen != 0) {
- plen -= PAGE_SIZE;
- (*_sparc_unmapioaddr)(res->start + plen);
- }
- release_resource(res);
- }
- #ifdef CONFIG_SBUS
- void sbus_set_sbus64(struct sbus_dev *sdev, int x) {
- printk("sbus_set_sbus64: unsupportedn");
- }
- /*
- * Allocate a chunk of memory suitable for DMA.
- * Typically devices use them for control blocks.
- * CPU may access them without any explicit flushing.
- *
- * XXX Some clever people know that sdev is not used and supply NULL. Watch.
- */
- void *sbus_alloc_consistent(struct sbus_dev *sdev, long len, u32 *dma_addrp)
- {
- unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
- unsigned long va;
- struct resource *res;
- int order;
- /* XXX why are some lenghts signed, others unsigned? */
- if (len <= 0) {
- return NULL;
- }
- /* XXX So what is maxphys for us and how do drivers know it? */
- if (len > 256*1024) { /* __get_free_pages() limit */
- return NULL;
- }
- order = get_order(len_total);
- va = __get_free_pages(GFP_KERNEL, order);
- if (va == 0) {
- /*
- * printk here may be flooding... Consider removal XXX.
- */
- printk("sbus_alloc_consistent: no %ld pagesn", len_total>>PAGE_SHIFT);
- return NULL;
- }
- if ((res = kmalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
- free_pages(va, order);
- printk("sbus_alloc_consistent: no coren");
- return NULL;
- }
- memset((char*)res, 0, sizeof(struct resource));
- if (allocate_resource(&_sparc_dvma, res, len_total,
- _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
- printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
- free_pages(va, order);
- kfree(res);
- return NULL;
- }
- mmu_map_dma_area(va, res->start, len_total);
- *dma_addrp = res->start;
- return (void *)res->start;
- }
- void sbus_free_consistent(struct sbus_dev *sdev, long n, void *p, u32 ba)
- {
- struct resource *res;
- unsigned long pgp;
- if ((res = _sparc_find_resource(&_sparc_dvma,
- (unsigned long)p)) == NULL) {
- printk("sbus_free_consistent: cannot free %pn", p);
- return;
- }
- if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
- printk("sbus_free_consistent: unaligned va %pn", p);
- return;
- }
- n = (n + PAGE_SIZE-1) & PAGE_MASK;
- if ((res->end-res->start)+1 != n) {
- printk("sbus_free_consistent: region 0x%lx asked 0x%lxn",
- (long)((res->end-res->start)+1), n);
- return;
- }
- release_resource(res);
- kfree(res);
- /* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
- pgp = (unsigned long) phys_to_virt(mmu_translate_dvma(ba));
- mmu_unmap_dma_area(ba, n);
- free_pages(pgp, get_order(n));
- }
- /*
- * Map a chunk of memory so that devices can see it.
- * CPU view of this memory may be inconsistent with
- * a device view and explicit flushing is necessary.
- */
- dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *va, size_t len, int direction)
- {
- #if 0 /* This is the version that abuses consistent space */
- unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
- struct resource *res;
- /* XXX why are some lenghts signed, others unsigned? */
- if (len <= 0) {
- return 0;
- }
- /* XXX So what is maxphys for us and how do drivers know it? */
- if (len > 256*1024) { /* __get_free_pages() limit */
- return 0;
- }
- if ((res = kmalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
- printk("sbus_map_single: no coren");
- return 0;
- }
- memset((char*)res, 0, sizeof(struct resource));
- res->name = va; /* XXX */
- if (allocate_resource(&_sparc_dvma, res, len_total,
- _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE) != 0) {
- printk("sbus_map_single: cannot occupy 0x%lx", len);
- kfree(res);
- return 0;
- }
- mmu_map_dma_area(va, res->start, len_total);
- mmu_flush_dma_area((unsigned long)va, len_total); /* in all contexts? */
- return res->start;
- #endif
- #if 1 /* "trampoline" version */
- /* XXX why are some lenghts signed, others unsigned? */
- if (len <= 0) {
- return 0;
- }
- /* XXX So what is maxphys for us and how do drivers know it? */
- if (len > 256*1024) { /* __get_free_pages() limit */
- return 0;
- }
- return mmu_get_scsi_one(va, len, sdev->bus);
- #endif
- }
- void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t ba, size_t n, int direction)
- {
- #if 0 /* This is the version that abuses consistent space */
- struct resource *res;
- unsigned long va;
- if ((res = _sparc_find_resource(&_sparc_dvma, ba)) == NULL) {
- printk("sbus_unmap_single: cannot find %08xn", (unsigned)ba);
- return;
- }
- n = (n + PAGE_SIZE-1) & PAGE_MASK;
- if ((res->end-res->start)+1 != n) {
- printk("sbus_unmap_single: region 0x%lx asked 0x%lxn",
- (long)((res->end-res->start)+1), n);
- return;
- }
- va = (unsigned long) res->name; /* XXX Ouch */
- mmu_inval_dma_area(va, n); /* in all contexts, mm's?... */
- mmu_unmap_dma_area(ba, n); /* iounit cache flush is here */
- release_resource(res);
- kfree(res);
- #endif
- #if 1 /* "trampoline" version */
- mmu_release_scsi_one(ba, n, sdev->bus);
- #endif
- }
- int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
- {
- mmu_get_scsi_sgl(sg, n, sdev->bus);
- /*
- * XXX sparc64 can return a partial length here. sun4c should do this
- * but it currently panics if it can't fulfill the request - Anton
- */
- return n;
- }
- void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
- {
- mmu_release_scsi_sgl(sg, n, sdev->bus);
- }
- /*
- */
- void sbus_dma_sync_single(struct sbus_dev *sdev, dma_addr_t ba, size_t size, int direction)
- {
- #if 0
- unsigned long va;
- struct resource *res;
- /* We do not need the resource, just print a message if invalid. */
- res = _sparc_find_resource(&_sparc_dvma, ba);
- if (res == NULL)
- panic("sbus_dma_sync_single: 0x%xn", ba);
- va = (unsigned long) phys_to_virt(mmu_translate_dvma(ba));
- /*
- * XXX This bogosity will be fixed with the iommu rewrite coming soon
- * to a kernel near you. - Anton
- */
- /* mmu_inval_dma_area(va, (size + PAGE_SIZE-1) & PAGE_MASK); */
- #endif
- }
- void sbus_dma_sync_sg(struct sbus_dev *sdev, struct scatterlist *sg, int n, int direction)
- {
- printk("sbus_dma_sync_sg: not implemented yetn");
- }
- #endif /* CONFIG_SBUS */
- #ifdef CONFIG_PCI
- /* Allocate and map kernel buffer using consistent mode DMA for a device.
- * hwdev should be valid struct pci_dev pointer for PCI devices.
- */
- void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba)
- {
- unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
- unsigned long va;
- struct resource *res;
- int order;
- if (len == 0) {
- return NULL;
- }
- if (len > 256*1024) { /* __get_free_pages() limit */
- return NULL;
- }
- order = get_order(len_total);
- va = __get_free_pages(GFP_KERNEL, order);
- if (va == 0) {
- printk("pci_alloc_consistent: no %ld pagesn", len_total>>PAGE_SHIFT);
- return NULL;
- }
- if ((res = kmalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
- free_pages(va, order);
- printk("pci_alloc_consistent: no coren");
- return NULL;
- }
- memset((char*)res, 0, sizeof(struct resource));
- if (allocate_resource(&_sparc_dvma, res, len_total,
- _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
- printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
- free_pages(va, order);
- kfree(res);
- return NULL;
- }
- mmu_inval_dma_area(va, len_total);
- #if 1
- /* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %xn",
- (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
- #endif
- {
- unsigned long xva, xpa;
- xva = res->start;
- xpa = virt_to_phys(va);
- while (len_total != 0) {
- len_total -= PAGE_SIZE;
- (*_sparc_mapioaddr)(xpa, xva, 0, 0);
- xva += PAGE_SIZE;
- xpa += PAGE_SIZE;
- }
- }
- *pba = virt_to_bus(va);
- return (void *) res->start;
- }
- /* Free and unmap a consistent DMA buffer.
- * cpu_addr is what was returned from pci_alloc_consistent,
- * size must be the same as what as passed into pci_alloc_consistent,
- * and likewise dma_addr must be the same as what *dma_addrp was set to.
- *
- * References to the memory and mappings assosciated with cpu_addr/dma_addr
- * past this call are illegal.
- */
- void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba)
- {
- struct resource *res;
- unsigned long pgp;
- if ((res = _sparc_find_resource(&_sparc_dvma,
- (unsigned long)p)) == NULL) {
- printk("pci_free_consistent: cannot free %pn", p);
- return;
- }
- if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
- printk("pci_free_consistent: unaligned va %pn", p);
- return;
- }
- n = (n + PAGE_SIZE-1) & PAGE_MASK;
- if ((res->end-res->start)+1 != n) {
- printk("pci_free_consistent: region 0x%lx asked 0x%lxn",
- (long)((res->end-res->start)+1), (long)n);
- return;
- }
- pgp = (unsigned long) bus_to_virt(ba);
- mmu_inval_dma_area(pgp, n);
- {
- int x;
- for (x = 0; x < n; x += PAGE_SIZE) {
- (*_sparc_unmapioaddr)((unsigned long)p + n);
- }
- }
- release_resource(res);
- kfree(res);
- free_pages(pgp, get_order(n));
- }
- /* Map a single buffer of the indicated size for DMA in streaming mode.
- * The 32-bit bus address to use is returned.
- *
- * Once the device is given the dma address, the device owns this memory
- * until either pci_unmap_single or pci_dma_sync_single is performed.
- */
- dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
- int direction)
- {
- if (direction == PCI_DMA_NONE)
- BUG();
- /* IIep is write-through, not flushing. */
- return virt_to_bus(ptr);
- }
- /* Unmap a single streaming mode DMA translation. The dma_addr and size
- * must match what was provided for in a previous pci_map_single call. All
- * other usages are undefined.
- *
- * After this call, reads by the cpu to the buffer are guarenteed to see
- * whatever the device wrote there.
- */
- void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size,
- int direction)
- {
- if (direction == PCI_DMA_NONE)
- BUG();
- if (direction != PCI_DMA_TODEVICE) {
- mmu_inval_dma_area((unsigned long)bus_to_virt(ba),
- (size + PAGE_SIZE-1) & PAGE_MASK);
- }
- }
- /* Map a set of buffers described by scatterlist in streaming
- * mode for DMA. This is the scather-gather version of the
- * above pci_map_single interface. Here the scatter gather list
- * elements are each tagged with the appropriate dma address
- * and length. They are obtained via sg_dma_{address,length}(SG).
- *
- * NOTE: An implementation may be able to use a smaller number of
- * DMA address/length pairs than there are SG table elements.
- * (for example via virtual mapping capabilities)
- * The routine returns the number of addr/length pairs actually
- * used, at most nents.
- *
- * Device ownership issues as mentioned above for pci_map_single are
- * the same here.
- */
- int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
- int direction)
- {
- int n;
- if (direction == PCI_DMA_NONE)
- BUG();
- /* IIep is write-through, not flushing. */
- for (n = 0; n < nents; n++) {
- sg->dvma_address = virt_to_bus(sg->address);
- sg->dvma_length = sg->length;
- sg++;
- }
- return nents;
- }
- /* Unmap a set of streaming mode DMA translations.
- * Again, cpu read rules concerning calls here are the same as for
- * pci_unmap_single() above.
- */
- void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
- int direction)
- {
- int n;
- if (direction == PCI_DMA_NONE)
- BUG();
- if (direction != PCI_DMA_TODEVICE) {
- for (n = 0; n < nents; n++) {
- mmu_inval_dma_area((unsigned long)sg->address,
- (sg->length + PAGE_SIZE-1) & PAGE_MASK);
- sg++;
- }
- }
- }
- /* Make physical memory consistent for a single
- * streaming mode DMA translation before or after a transfer.
- *
- * If you perform a pci_map_single() but wish to interrogate the
- * buffer using the cpu, yet do not wish to teardown the PCI dma
- * mapping, you must call this function before doing so. At the
- * next point you give the PCI dma address back to the card, the
- * device again owns the buffer.
- */
- void pci_dma_sync_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction)
- {
- if (direction == PCI_DMA_NONE)
- BUG();
- if (direction != PCI_DMA_TODEVICE) {
- mmu_inval_dma_area((unsigned long)bus_to_virt(ba),
- (size + PAGE_SIZE-1) & PAGE_MASK);
- }
- }
- /* Make physical memory consistent for a set of streaming
- * mode DMA translations after a transfer.
- *
- * The same as pci_dma_sync_single but for a scatter-gather list,
- * same rules and usage.
- */
- void pci_dma_sync_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
- {
- int n;
- if (direction == PCI_DMA_NONE)
- BUG();
- if (direction != PCI_DMA_TODEVICE) {
- for (n = 0; n < nents; n++) {
- mmu_inval_dma_area((unsigned long)sg->address,
- (sg->length + PAGE_SIZE-1) & PAGE_MASK);
- sg++;
- }
- }
- }
- #endif /* CONFIG_PCI */
- #ifdef CONFIG_PROC_FS
- static int
- _sparc_io_get_info(char *buf, char **start, off_t fpos, int length, int *eof,
- void *data)
- {
- char *p = buf, *e = buf + length;
- struct resource *r;
- const char *nm;
- for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
- if (p + 32 >= e) /* Better than nothing */
- break;
- if ((nm = r->name) == 0) nm = "???";
- p += sprintf(p, "%08lx-%08lx: %sn", r->start, r->end, nm);
- }
- return p-buf;
- }
- #endif /* CONFIG_PROC_FS */
- /*
- * This is a version of find_resource and it belongs to kernel/resource.c.
- * Until we have agreement with Linus and Martin, it lingers here.
- *
- * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
- * This probably warrants some sort of hashing.
- */
- struct resource *
- _sparc_find_resource(struct resource *root, unsigned long hit)
- {
- struct resource *tmp;
- for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
- if (tmp->start <= hit && tmp->end >= hit)
- return tmp;
- }
- return NULL;
- }
- /*
- * Necessary boot time initializations.
- */
- void ioport_init(void)
- {
- extern void sun4c_mapioaddr(unsigned long, unsigned long, int, int);
- extern void srmmu_mapioaddr(unsigned long, unsigned long, int, int);
- extern void sun4c_unmapioaddr(unsigned long);
- extern void srmmu_unmapioaddr(unsigned long);
- switch(sparc_cpu_model) {
- case sun4c:
- case sun4:
- case sun4e:
- _sparc_mapioaddr = sun4c_mapioaddr;
- _sparc_unmapioaddr = sun4c_unmapioaddr;
- break;
- case sun4m:
- case sun4d:
- _sparc_mapioaddr = srmmu_mapioaddr;
- _sparc_unmapioaddr = srmmu_unmapioaddr;
- break;
- default:
- printk("ioport_init: cpu type %d is unknown.n",
- sparc_cpu_model);
- halt();
- };
- }
- void register_proc_sparc_ioport(void)
- {
- #ifdef CONFIG_PROC_FS
- create_proc_read_entry("io_map",0,0,_sparc_io_get_info,&sparc_iomap);
- create_proc_read_entry("dvma_map",0,0,_sparc_io_get_info,&_sparc_dvma);
- #endif
- }