Revert "arm: mm: hugetlb WT hack"

[pandora-kernel.git] / arch / arm / mm / mmu.c

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 39e8f4e..0a5191e 100644 (file)
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -15,6 +15,7 @@
 #include <linux/nodemask.h>
 #include <linux/memblock.h>
 #include <linux/fs.h>
+#include <linux/vmalloc.h>
 
 #include <asm/cputype.h>
 #include <asm/sections.h>
@@ -450,6 +451,14 @@ static void __init build_mem_type_table(void)
                mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_S;
                mem_types[MT_MEMORY_NONCACHED].prot_pte |= L_PTE_SHARED;
        }
+       /*
+        * We don't use domains on ARMv6 (since this causes problems with
+        * v6/v7 kernels), so we must use a separate memory type for user
+        * r/o, kernel r/w to map the vectors page.
+        */
+       if (cpu_arch == CPU_ARCH_ARMv6)
+               vecs_pgprot |= L_PTE_MT_VECTORS;
+
        /*
         * ARMv6 and above have extended page tables.
         */
@@ -582,13 +591,18 @@ EXPORT_SYMBOL(phys_mem_access_prot);
 
 #define vectors_base() (vectors_high() ? 0xffff0000 : 0)
 
-static void __init *early_alloc(unsigned long sz)
+static void __init *early_alloc_aligned(unsigned long sz, unsigned long align)
 {
-       void *ptr = __va(memblock_alloc(sz, sz));
+       void *ptr = __va(memblock_alloc(sz, align));
        memset(ptr, 0, sz);
        return ptr;
 }
 
+static void __init *early_alloc(unsigned long sz)
+{
+       return early_alloc_aligned(sz, sz);
+}
+
 static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot)
 {
        if (pmd_none(*pmd)) {
@@ -742,9 +756,10 @@ static void __init create_mapping(struct map_desc *md)
        }
 
        if ((md->type == MT_DEVICE || md->type == MT_ROM) &&
-           md->virtual >= PAGE_OFFSET && md->virtual < VMALLOC_END) {
+           md->virtual >= PAGE_OFFSET &&
+           (md->virtual < VMALLOC_START || md->virtual >= VMALLOC_END)) {
                printk(KERN_WARNING "BUG: mapping for 0x%08llx"
-                      " at 0x%08lx overlaps vmalloc space\n",
+                      " at 0x%08lx out of vmalloc space\n",
                       (long long)__pfn_to_phys((u64)md->pfn), md->virtual);
        }
 
@@ -788,18 +803,33 @@ static void __init create_mapping(struct map_desc *md)
  */
 void __init iotable_init(struct map_desc *io_desc, int nr)
 {
-       int i;
+       struct map_desc *md;
+       struct vm_struct *vm;
 
-       for (i = 0; i < nr; i++)
-               create_mapping(io_desc + i);
+       if (!nr)
+               return;
+
+       vm = early_alloc_aligned(sizeof(*vm) * nr, __alignof__(*vm));
+
+       for (md = io_desc; nr; md++, nr--) {
+               create_mapping(md);
+               vm->addr = (void *)(md->virtual & PAGE_MASK);
+               vm->size = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK));
+               vm->phys_addr = __pfn_to_phys(md->pfn); 
+               vm->flags = VM_IOREMAP | VM_ARM_STATIC_MAPPING; 
+               vm->flags |= VM_ARM_MTYPE(md->type);
+               vm->caller = iotable_init;
+               vm_area_add_early(vm++);
+       }
 }
 
-static void * __initdata vmalloc_min = (void *)(VMALLOC_END - SZ_128M);
+static void * __initdata vmalloc_min =
+       (void *)(VMALLOC_END - (240 << 20) - VMALLOC_OFFSET);
 
 /*
  * vmalloc=size forces the vmalloc area to be exactly 'size'
  * bytes. This can be used to increase (or decrease) the vmalloc
- * area - the default is 128m.
+ * area - the default is 240m.
  */
 static int __init early_vmalloc(char *arg)
 {
@@ -964,10 +994,10 @@ static inline void prepare_page_table(void)
 
        /*
         * Clear out all the kernel space mappings, except for the first
-        * memory bank, up to the end of the vmalloc region.
+        * memory bank, up to the vmalloc region.
         */
        for (addr = __phys_to_virt(end);
-            addr < VMALLOC_END; addr += PMD_SIZE)
+            addr < VMALLOC_START; addr += PMD_SIZE)
                pmd_clear(pmd_off_k(addr));
 }
 
@@ -1000,8 +1030,8 @@ void __init arm_mm_memblock_reserve(void)
 }
 
 /*
- * Set up device the mappings.  Since we clear out the page tables for all
- * mappings above VMALLOC_END, we will remove any debug device mappings.
+ * Set up the device mappings.  Since we clear out the page tables for all
+ * mappings above VMALLOC_START, we will remove any debug device mappings.
  * This means you have to be careful how you debug this function, or any
  * called function.  This means you can't use any function or debugging
  * method which may touch any device, otherwise the kernel _will_ crash.
@@ -1016,7 +1046,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
         */
        vectors_page = early_alloc(PAGE_SIZE);
 
-       for (addr = VMALLOC_END; addr; addr += PMD_SIZE)
+       for (addr = VMALLOC_START; addr; addr += PMD_SIZE)
                pmd_clear(pmd_off_k(addr));
 
        /*