Fix IO address issue.

[linux-2.6-omap-h63xx.git] / arch / parisc / mm / ioremap.c

diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c
index 0db12818d7bc4f683a8ffc1514806881d338d96e..92d496ad07c97b9be730f8799bf96f7c5a538d3b 100644 (file)
--- a/arch/parisc/mm/ioremap.c
+++ b/arch/parisc/mm/ioremap.c
@@ -2,117 +2,15 @@
  * arch/parisc/mm/ioremap.c
  *
  * (C) Copyright 1995 1996 Linus Torvalds
- * (C) Copyright 2001 Helge Deller <deller@gmx.de>
+ * (C) Copyright 2001-2006 Helge Deller <deller@gmx.de>
  * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
  */
 
 #include <linux/vmalloc.h>
 #include <linux/errno.h>
 #include <linux/module.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/pgalloc.h>
-#include <asm/tlbflush.h>
-#include <asm/cacheflush.h>
-
-static inline void 
-remap_area_pte(pte_t *pte, unsigned long address, unsigned long size,
-              unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end, pfn;
-       pgprot_t pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
-                                  _PAGE_ACCESSED | flags);
-
-       address &= ~PMD_MASK;
-
-       end = address + size;
-       if (end > PMD_SIZE)
-               end = PMD_SIZE;
-
-       BUG_ON(address >= end);
-
-       pfn = phys_addr >> PAGE_SHIFT;
-       do {
-               BUG_ON(!pte_none(*pte));
-
-               set_pte(pte, pfn_pte(pfn, pgprot));
-
-               address += PAGE_SIZE;
-               pfn++;
-               pte++;
-       } while (address && (address < end));
-}
-
-static inline int 
-remap_area_pmd(pmd_t *pmd, unsigned long address, unsigned long size,
-              unsigned long phys_addr, unsigned long flags)
-{
-       unsigned long end;
-
-       address &= ~PGDIR_MASK;
-
-       end = address + size;
-       if (end > PGDIR_SIZE)
-               end = PGDIR_SIZE;
-
-       BUG_ON(address >= end);
-
-       phys_addr -= address;
-       do {
-               pte_t *pte = pte_alloc_kernel(pmd, address);
-               if (!pte)
-                       return -ENOMEM;
-
-               remap_area_pte(pte, address, end - address, 
-                              address + phys_addr, flags);
-
-               address = (address + PMD_SIZE) & PMD_MASK;
-               pmd++;
-       } while (address && (address < end));
-
-       return 0;
-}
-
-static int 
-remap_area_pages(unsigned long address, unsigned long phys_addr,
-                unsigned long size, unsigned long flags)
-{
-       pgd_t *dir;
-       int error = 0;
-       unsigned long end = address + size;
-
-       BUG_ON(address >= end);
-
-       phys_addr -= address;
-       dir = pgd_offset_k(address);
-
-       flush_cache_all();
-
-       do {
-               pud_t *pud;
-               pmd_t *pmd;
-
-               error = -ENOMEM;
-               pud = pud_alloc(&init_mm, dir, address);
-               if (!pud)
-                       break;
-
-               pmd = pmd_alloc(&init_mm, pud, address);
-               if (!pmd)
-                       break;
-
-               if (remap_area_pmd(pmd, address, end - address,
-                                  phys_addr + address, flags))
-                       break;
-
-               error = 0;
-               address = (address + PGDIR_SIZE) & PGDIR_MASK;
-               dir++;
-       } while (address && (address < end));
-
-       flush_tlb_all();
-
-       return error;
-}
 
 /*
  * Generic mapping function (not visible outside):
@@ -128,9 +26,10 @@ remap_area_pages(unsigned long address, unsigned long phys_addr,
  */
 void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags)
 {
-       void *addr;
+       void __iomem *addr;
        struct vm_struct *area;
        unsigned long offset, last_addr;
+       pgprot_t pgprot;
 
 #ifdef CONFIG_EISA
        unsigned long end = phys_addr + size - 1;
@@ -138,6 +37,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
        if ((phys_addr >= 0x00080000 && end < 0x000fffff) ||
            (phys_addr >= 0x00500000 && end < 0x03bfffff)) {
                phys_addr |= F_EXTEND(0xfc000000);
+               flags |= _PAGE_NO_CACHE;
        }
 #endif
 
@@ -163,6 +63,9 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
                }
        }
 
+       pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
+                         _PAGE_ACCESSED | flags);
+
        /*
         * Mappings have to be page-aligned
         */
@@ -177,17 +80,18 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
        if (!area)
                return NULL;
 
-       addr = area->addr;
-       if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
+       addr = (void __iomem *) area->addr;
+       if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
+                              phys_addr, pgprot)) {
                vfree(addr);
                return NULL;
        }
 
-       return (void __iomem *) (offset + (char *)addr);
+       return (void __iomem *) (offset + (char __iomem *)addr);
 }
 EXPORT_SYMBOL(__ioremap);
 
-void iounmap(void __iomem *addr)
+void iounmap(const volatile void __iomem *addr)
 {
        if (addr > high_memory)
                return vfree((void *) (PAGE_MASK & (unsigned long __force) addr));