Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / arm / mm / ioremap.c

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 00bb8fd..c1f7180 100644 (file)
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -74,7 +74,7 @@ remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
 
        pgprot = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY | L_PTE_WRITE | flags);
        do {
-               pte_t * pte = pte_alloc_kernel(&init_mm, pmd, address);
+               pte_t * pte = pte_alloc_kernel(pmd, address);
                if (!pte)
                        return -ENOMEM;
                remap_area_pte(pte, address, end - address, address + phys_addr, pgprot);
@@ -85,18 +85,18 @@ remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size,
 }
 
 static int
-remap_area_pages(unsigned long start, unsigned long phys_addr,
+remap_area_pages(unsigned long start, unsigned long pfn,
                 unsigned long size, unsigned long flags)
 {
        unsigned long address = start;
        unsigned long end = start + size;
+       unsigned long phys_addr = __pfn_to_phys(pfn);
        int err = 0;
        pgd_t * dir;
 
        phys_addr -= address;
        dir = pgd_offset(&init_mm, address);
        BUG_ON(address >= end);
-       spin_lock(&init_mm.page_table_lock);
        do {
                pmd_t *pmd = pmd_alloc(&init_mm, dir, address);
                if (!pmd) {
@@ -113,7 +113,6 @@ remap_area_pages(unsigned long start, unsigned long phys_addr,
                dir++;
        } while (address && (address < end));
 
-       spin_unlock(&init_mm.page_table_lock);
        flush_cache_vmap(start, end);
        return err;
 }
@@ -131,42 +130,96 @@ remap_area_pages(unsigned long start, unsigned long phys_addr,
  * mapping.  See include/asm-arm/proc-armv/pgtable.h for more information.
  */
 void __iomem *
-__ioremap(unsigned long phys_addr, size_t size, unsigned long flags,
-         unsigned long align)
+__ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
+             unsigned long flags)
 {
-       void * addr;
-       struct vm_struct * area;
-       unsigned long offset, last_addr;
+       unsigned long addr;
+       struct vm_struct * area;
+
+       area = get_vm_area(size, VM_IOREMAP);
+       if (!area)
+               return NULL;
+       addr = (unsigned long)area->addr;
+       if (remap_area_pages(addr, pfn, size, flags)) {
+               vunmap((void *)addr);
+               return NULL;
+       }
+       return (void __iomem *) (offset + (char *)addr);
+}
+EXPORT_SYMBOL(__ioremap_pfn);
+
+void __iomem *
+__ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
+{
+       unsigned long last_addr;
+       unsigned long offset = phys_addr & ~PAGE_MASK;
+       unsigned long pfn = __phys_to_pfn(phys_addr);
 
-       /* Don't allow wraparound or zero size */
+       /*
+        * Don't allow wraparound or zero size
+        */
        last_addr = phys_addr + size - 1;
        if (!size || last_addr < phys_addr)
                return NULL;
 
        /*
-        * Mappings have to be page-aligned
+        * Page align the mapping size
         */
-       offset = phys_addr & ~PAGE_MASK;
-       phys_addr &= PAGE_MASK;
        size = PAGE_ALIGN(last_addr + 1) - phys_addr;
 
-       /*
-        * Ok, go for it..
-        */
-       area = get_vm_area(size, VM_IOREMAP);
-       if (!area)
-               return NULL;
-       addr = area->addr;
-       if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
-               vfree(addr);
-               return NULL;
-       }
-       return (void __iomem *) (offset + (char *)addr);
+       return __ioremap_pfn(pfn, offset, size, flags);
 }
 EXPORT_SYMBOL(__ioremap);
 
 void __iounmap(void __iomem *addr)
 {
-       vfree((void *) (PAGE_MASK & (unsigned long) addr));
+       vunmap((void *)(PAGE_MASK & (unsigned long)addr));
 }
 EXPORT_SYMBOL(__iounmap);
+
+#ifdef __io
+void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+       return __io(port);
+}
+EXPORT_SYMBOL(ioport_map);
+
+void ioport_unmap(void __iomem *addr)
+{
+}
+EXPORT_SYMBOL(ioport_unmap);
+#endif
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#include <linux/ioport.h>
+
+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
+{
+       unsigned long start = pci_resource_start(dev, bar);
+       unsigned long len   = pci_resource_len(dev, bar);
+       unsigned long flags = pci_resource_flags(dev, bar);
+
+       if (!len || !start)
+               return NULL;
+       if (maxlen && len > maxlen)
+               len = maxlen;
+       if (flags & IORESOURCE_IO)
+               return ioport_map(start, len);
+       if (flags & IORESOURCE_MEM) {
+               if (flags & IORESOURCE_CACHEABLE)
+                       return ioremap(start, len);
+               return ioremap_nocache(start, len);
+       }
+       return NULL;
+}
+EXPORT_SYMBOL(pci_iomap);
+
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{
+       if ((unsigned long)addr >= VMALLOC_START &&
+           (unsigned long)addr < VMALLOC_END)
+               iounmap(addr);
+}
+EXPORT_SYMBOL(pci_iounmap);
+#endif