Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6

[pandora-kernel.git] / arch / powerpc / mm / pgtable_64.c

diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 724f97e..51b7869 100644 (file)
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -67,30 +67,9 @@
 #include <asm/vdso.h>
 #include <asm/imalloc.h>
 
-#if PGTABLE_RANGE > USER_VSID_RANGE
-#warning Limited user VSID range means pagetable space is wasted
-#endif
-
-#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
-#warning TASK_SIZE is smaller than it needs to be.
-#endif
-
-int mem_init_done;
 unsigned long ioremap_bot = IMALLOC_BASE;
 static unsigned long phbs_io_bot = PHBS_IO_BASE;
 
-extern pgd_t swapper_pg_dir[];
-extern struct task_struct *current_set[NR_CPUS];
-
-unsigned long klimit = (unsigned long)_end;
-
-/* max amount of RAM to use */
-unsigned long __max_memory;
-
-/* info on what we think the IO hole is */
-unsigned long  io_hole_start;
-unsigned long  io_hole_size;
-
 #ifdef CONFIG_PPC_ISERIES
 
 void __iomem *ioremap(unsigned long addr, unsigned long size)
@@ -122,10 +101,8 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
        pud_t *pudp;
        pmd_t *pmdp;
        pte_t *ptep;
-       unsigned long vsid;
 
        if (mem_init_done) {
-               spin_lock(&init_mm.page_table_lock);
                pgdp = pgd_offset_k(ea);
                pudp = pud_alloc(&init_mm, pgdp, ea);
                if (!pudp)
@@ -133,35 +110,21 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
                pmdp = pmd_alloc(&init_mm, pudp, ea);
                if (!pmdp)
                        return -ENOMEM;
-               ptep = pte_alloc_kernel(&init_mm, pmdp, ea);
+               ptep = pte_alloc_kernel(pmdp, ea);
                if (!ptep)
                        return -ENOMEM;
                set_pte_at(&init_mm, ea, ptep, pfn_pte(pa >> PAGE_SHIFT,
                                                          __pgprot(flags)));
-               spin_unlock(&init_mm.page_table_lock);
        } else {
-               unsigned long va, vpn, hash, hpteg;
-
                /*
                 * If the mm subsystem is not fully up, we cannot create a
                 * linux page table entry for this mapping.  Simply bolt an
                 * entry in the hardware page table.
+                *
                 */
-               vsid = get_kernel_vsid(ea);
-               va = (vsid << 28) | (ea & 0xFFFFFFF);
-               vpn = va >> PAGE_SHIFT;
-
-               hash = hpt_hash(vpn, 0);
-
-               hpteg = ((hash & htab_hash_mask) * HPTES_PER_GROUP);
-
-               /* Panic if a pte grpup is full */
-               if (ppc_md.hpte_insert(hpteg, va, pa >> PAGE_SHIFT,
-                                      HPTE_V_BOLTED,
-                                      _PAGE_NO_CACHE|_PAGE_GUARDED|PP_RWXX)
-                   == -1) {
-                       panic("map_io_page: could not insert mapping");
-               }
+               if (htab_bolt_mapping(ea, ea + PAGE_SIZE, pa, flags,
+                                     mmu_virtual_psize))
+                       panic("Can't map bolted IO mapping");
        }
        return 0;
 }
@@ -355,3 +318,16 @@ int iounmap_explicit(volatile void __iomem *start, unsigned long size)
 EXPORT_SYMBOL(ioremap);
 EXPORT_SYMBOL(__ioremap);
 EXPORT_SYMBOL(iounmap);
+
+void __iomem * reserve_phb_iospace(unsigned long size)
+{
+       void __iomem *virt_addr;
+               
+       if (phbs_io_bot >= IMALLOC_BASE) 
+               panic("reserve_phb_iospace(): phb io space overflow\n");
+                       
+       virt_addr = (void __iomem *) phbs_io_bot;
+       phbs_io_bot += size;
+
+       return virt_addr;
+}