[PATCH] Generic ioremap_page_range: x86_64 conversion

Convert x86_64 to use generic ioremap_page_range()

[akpm@osdl.org: build fix]
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 104 deletions

diff --git a/arch/x86_64/mm/ioremap.c b/arch/x86_64/mm/ioremap.c
index 45d7d823c3b8..c6e5e8d401a4 100644
--- a/arch/x86_64/mm/ioremap.c
+++ b/arch/x86_64/mm/ioremap.c
@@ -12,117 +12,16 @@
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/module.h>
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/pgalloc.h>
 #include <asm/fixmap.h>
-#include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/cacheflush.h>
 #include <asm/proto.h>
 
 #define ISA_START_ADDRESS      0xa0000
 #define ISA_END_ADDRESS                0x100000
 
-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;
-        unsigned long pfn;
-
-        address &= ~PMD_MASK;
-        end = address + size;
-        if (end > PMD_SIZE)
-                end = PMD_SIZE;
-        if (address >= end)
-                BUG();
-        pfn = phys_addr >> PAGE_SHIFT;
-        do {
-                if (!pte_none(*pte)) {
-                        printk("remap_area_pte: page already exists\n");
-                        BUG();
-                }
-                set_pte(pte, pfn_pte(pfn, __pgprot(_PAGE_PRESENT | _PAGE_RW | 
-                                        _PAGE_GLOBAL | _PAGE_DIRTY | _PAGE_ACCESSED | flags)));
-                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 &= ~PUD_MASK;
-        end = address + size;
-        if (end > PUD_SIZE)
-                end = PUD_SIZE;
-        phys_addr -= address;
-        if (address >= end)
-                BUG();
-        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 inline int remap_area_pud(pud_t * pud, 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;
-        phys_addr -= address;
-        if (address >= end)
-                BUG();
-        do {
-                pmd_t * pmd = pmd_alloc(&init_mm, pud, address);
-                if (!pmd)
-                        return -ENOMEM;
-                remap_area_pmd(pmd, address, end - address, address + phys_addr, flags);
-                address = (address + PUD_SIZE) & PUD_MASK;
-                pud++;
-        } while (address && (address < end));
-        return 0;
-}
-
-static int remap_area_pages(unsigned long address, unsigned long phys_addr,
-                                 unsigned long size, unsigned long flags)
-{
-        int error;
-        pgd_t *pgd;
-        unsigned long end = address + size;
-
-        phys_addr -= address;
-        pgd = pgd_offset_k(address);
-        flush_cache_all();
-        if (address >= end)
-                BUG();
-        do {
-                pud_t *pud;
-                pud = pud_alloc(&init_mm, pgd, address);
-                error = -ENOMEM;
-                if (!pud)
-                        break;
-                if (remap_area_pud(pud, address, end - address,
-                                         phys_addr + address, flags))
-                        break;
-                error = 0;
-                address = (address + PGDIR_SIZE) & PGDIR_MASK;
-                pgd++;
-        } while (address && (address < end));
-        flush_tlb_all();
-        return error;
-}
-
 /*
  * Fix up the linear direct mapping of the kernel to avoid cache attribute
  * conflicts.
@@ -165,6 +64,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
         void * addr;
         struct vm_struct * area;
         unsigned long offset, last_addr;
+        pgprot_t pgprot;
 
         /* Don't allow wraparound or zero size */
         last_addr = phys_addr + size - 1;
@@ -194,6 +94,8 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
         }
 #endif
 
+        pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_GLOBAL
+                          | _PAGE_DIRTY | _PAGE_ACCESSED | flags);
         /*
          * Mappings have to be page-aligned
          */
@@ -209,7 +111,8 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
                 return NULL;
         area->phys_addr = phys_addr;
         addr = area->addr;
-        if (remap_area_pages((unsigned long) addr, phys_addr, size, flags)) {
+        if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
+                               phys_addr, pgprot)) {
                 remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr));
                 return NULL;
         }