1 files changed, 82 insertions, 15 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index dc8c550e6cbd..94c5a0c94f5e 100644
--- 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>
@@ -150,6 +151,7 @@ static int __init early_nowrite(char *__unused)
 }
 early_param("nowb", early_nowrite);
 
+#ifndef CONFIG_ARM_LPAE
 static int __init early_ecc(char *p)
 {
         if (memcmp(p, "on", 2) == 0)
@@ -159,6 +161,7 @@ static int __init early_ecc(char *p)
         return 0;
 }
 early_param("ecc", early_ecc);
+#endif
 
 static int __init noalign_setup(char *__unused)
 {
@@ -228,10 +231,12 @@ static struct mem_type mem_types[] = {
                 .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
                 .domain    = DOMAIN_KERNEL,
         },
+#ifndef CONFIG_ARM_LPAE
         [MT_MINICLEAN] = {
                 .prot_sect = PMD_TYPE_SECT | PMD_SECT_XN | PMD_SECT_MINICACHE,
                 .domain    = DOMAIN_KERNEL,
         },
+#endif
         [MT_LOW_VECTORS] = {
                 .prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
                                 L_PTE_RDONLY,
@@ -429,6 +434,7 @@ static void __init build_mem_type_table(void)
          * ARMv6 and above have extended page tables.
          */
         if (cpu_arch >= CPU_ARCH_ARMv6 && (cr & CR_XP)) {
+#ifndef CONFIG_ARM_LPAE
                 /*
                  * Mark cache clean areas and XIP ROM read only
                  * from SVC mode and no access from userspace.
@@ -436,6 +442,7 @@ static void __init build_mem_type_table(void)
                 mem_types[MT_ROM].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
                 mem_types[MT_MINICLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
                 mem_types[MT_CACHECLEAN].prot_sect |= PMD_SECT_APX|PMD_SECT_AP_WRITE;
+#endif
 
                 if (is_smp()) {
                         /*
@@ -474,6 +481,18 @@ static void __init build_mem_type_table(void)
                 mem_types[MT_MEMORY_NONCACHED].prot_sect |= PMD_SECT_BUFFERABLE;
         }
 
+#ifdef CONFIG_ARM_LPAE
+        /*
+         * Do not generate access flag faults for the kernel mappings.
+         */
+        for (i = 0; i < ARRAY_SIZE(mem_types); i++) {
+                mem_types[i].prot_pte |= PTE_EXT_AF;
+                mem_types[i].prot_sect |= PMD_SECT_AF;
+        }
+        kern_pgprot |= PTE_EXT_AF;
+        vecs_pgprot |= PTE_EXT_AF;
+#endif
+
         for (i = 0; i < 16; i++) {
                 unsigned long v = pgprot_val(protection_map[i]);
                 protection_map[i] = __pgprot(v | user_pgprot);
@@ -529,13 +548,18 @@ 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)) {
@@ -572,8 +596,10 @@ static void __init alloc_init_section(pud_t *pud, unsigned long addr,
         if (((addr | end | phys) & ~SECTION_MASK) == 0) {
                 pmd_t *p = pmd;
 
+#ifndef CONFIG_ARM_LPAE
                 if (addr & SECTION_SIZE)
                         pmd++;
+#endif
 
                 do {
                         *pmd = __pmd(phys | type->prot_sect);
@@ -603,6 +629,7 @@ static void alloc_init_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
         } while (pud++, addr = next, addr != end);
 }
 
+#ifndef CONFIG_ARM_LPAE
 static void __init create_36bit_mapping(struct map_desc *md,
                                         const struct mem_type *type)
 {
@@ -662,6 +689,7 @@ static void __init create_36bit_mapping(struct map_desc *md,
                 pgd += SUPERSECTION_SIZE >> PGDIR_SHIFT;
         } while (addr != end);
 }
+#endif  /* !CONFIG_ARM_LPAE */
 
 /*
  * Create the page directory entries and any necessary
@@ -685,14 +713,16 @@ 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);
         }
 
         type = &mem_types[md->type];
 
+#ifndef CONFIG_ARM_LPAE
         /*
          * Catch 36-bit addresses
          */
@@ -700,6 +730,7 @@ static void __init create_mapping(struct map_desc *md)
                 create_36bit_mapping(md, type);
                 return;
         }
+#endif
 
         addr = md->virtual & PAGE_MASK;
         phys = __pfn_to_phys(md->pfn);
@@ -729,18 +760,33 @@ 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;
+
+        if (!nr)
+                return;
 
-        for (i = 0; i < nr; i++)
-                create_mapping(io_desc + i);
+        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)
 {
@@ -775,6 +821,9 @@ void __init sanity_check_meminfo(void)
                 struct membank *bank = &meminfo.bank[j];
                 *bank = meminfo.bank[i];
 
+                if (bank->start > ULONG_MAX)
+                        highmem = 1;
+
 #ifdef CONFIG_HIGHMEM
                 if (__va(bank->start) >= vmalloc_min ||
                     __va(bank->start) < (void *)PAGE_OFFSET)
@@ -786,7 +835,7 @@ void __init sanity_check_meminfo(void)
                  * Split those memory banks which are partially overlapping
                  * the vmalloc area greatly simplifying things later.
                  */
-                if (__va(bank->start) < vmalloc_min &&
+                if (!highmem && __va(bank->start) < vmalloc_min &&
                     bank->size > vmalloc_min - __va(bank->start)) {
                         if (meminfo.nr_banks >= NR_BANKS) {
                                 printk(KERN_CRIT "NR_BANKS too low, "
@@ -807,6 +856,17 @@ void __init sanity_check_meminfo(void)
                 bank->highmem = highmem;
 
                 /*
+                 * Highmem banks not allowed with !CONFIG_HIGHMEM.
+                 */
+                if (highmem) {
+                        printk(KERN_NOTICE "Ignoring RAM at %.8llx-%.8llx "
+                               "(!CONFIG_HIGHMEM).\n",
+                               (unsigned long long)bank->start,
+                               (unsigned long long)bank->start + bank->size - 1);
+                        continue;
+                }
+
+                /*
                  * Check whether this memory bank would entirely overlap
                  * the vmalloc area.
                  */
@@ -860,6 +920,7 @@ void __init sanity_check_meminfo(void)
         }
 #endif
         meminfo.nr_banks = j;
+        high_memory = __va(lowmem_limit - 1) + 1;
         memblock_set_current_limit(lowmem_limit);
 }
 
@@ -890,14 +951,20 @@ 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));
 }
 
+#ifdef CONFIG_ARM_LPAE
+/* the first page is reserved for pgd */
+#define SWAPPER_PG_DIR_SIZE     (PAGE_SIZE + \
+                                 PTRS_PER_PGD * PTRS_PER_PMD * sizeof(pmd_t))
+#else
 #define SWAPPER_PG_DIR_SIZE     (PTRS_PER_PGD * sizeof(pgd_t))
+#endif
 
 /*
  * Reserve the special regions of memory
@@ -920,8 +987,8 @@ 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.
@@ -936,7 +1003,7 @@ 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));
 
         /*