1 files changed, 69 insertions, 39 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 25d9a11eb617..8ba754064559 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -15,6 +15,7 @@
 #include <linux/mman.h>
 #include <linux/nodemask.h>
 
+#include <asm/cputype.h>
 #include <asm/mach-types.h>
 #include <asm/setup.h>
 #include <asm/sizes.h>
@@ -27,9 +28,6 @@
 
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
-extern void _stext, _etext, __data_start, _end;
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-
 /*
  * empty_zero_page is a special page that is used for
  * zero-initialized data and COW.
@@ -68,27 +66,27 @@ static struct cachepolicy cache_policies[] __initdata = {
                 .policy         = "uncached",
                 .cr_mask        = CR_W|CR_C,
                 .pmd            = PMD_SECT_UNCACHED,
-                .pte            = 0,
+                .pte            = L_PTE_MT_UNCACHED,
         }, {
                 .policy         = "buffered",
                 .cr_mask        = CR_C,
                 .pmd            = PMD_SECT_BUFFERED,
-                .pte            = PTE_BUFFERABLE,
+                .pte            = L_PTE_MT_BUFFERABLE,
         }, {
                 .policy         = "writethrough",
                 .cr_mask        = 0,
                 .pmd            = PMD_SECT_WT,
-                .pte            = PTE_CACHEABLE,
+                .pte            = L_PTE_MT_WRITETHROUGH,
         }, {
                 .policy         = "writeback",
                 .cr_mask        = 0,
                 .pmd            = PMD_SECT_WB,
-                .pte            = PTE_BUFFERABLE|PTE_CACHEABLE,
+                .pte            = L_PTE_MT_WRITEBACK,
         }, {
                 .policy         = "writealloc",
                 .cr_mask        = 0,
                 .pmd            = PMD_SECT_WBWA,
-                .pte            = PTE_BUFFERABLE|PTE_CACHEABLE,
+                .pte            = L_PTE_MT_WRITEALLOC,
         }
 };
 
@@ -186,29 +184,28 @@ void adjust_cr(unsigned long mask, unsigned long set)
 
 static struct mem_type mem_types[] = {
         [MT_DEVICE] = {           /* Strongly ordered / ARMv6 shared device */
-                .prot_pte       = PROT_PTE_DEVICE,
+                .prot_pte       = PROT_PTE_DEVICE | L_PTE_MT_DEV_SHARED |
+                                  L_PTE_SHARED,
                 .prot_l1        = PMD_TYPE_TABLE,
                 .prot_sect      = PROT_SECT_DEVICE | PMD_SECT_UNCACHED,
                 .domain         = DOMAIN_IO,
         },
         [MT_DEVICE_NONSHARED] = { /* ARMv6 non-shared device */
-                .prot_pte       = PROT_PTE_DEVICE,
-                .prot_pte_ext   = PTE_EXT_TEX(2),
+                .prot_pte       = PROT_PTE_DEVICE | L_PTE_MT_DEV_NONSHARED,
                 .prot_l1        = PMD_TYPE_TABLE,
                 .prot_sect      = PROT_SECT_DEVICE | PMD_SECT_TEX(2),
                 .domain         = DOMAIN_IO,
         },
         [MT_DEVICE_CACHED] = {    /* ioremap_cached */
-                .prot_pte       = PROT_PTE_DEVICE | L_PTE_CACHEABLE | L_PTE_BUFFERABLE,
+                .prot_pte       = PROT_PTE_DEVICE | L_PTE_MT_DEV_CACHED,
                 .prot_l1        = PMD_TYPE_TABLE,
                 .prot_sect      = PROT_SECT_DEVICE | PMD_SECT_WB,
                 .domain         = DOMAIN_IO,
         },      
-        [MT_DEVICE_IXP2000] = {   /* IXP2400 requires XCB=101 for on-chip I/O */
-                .prot_pte       = PROT_PTE_DEVICE,
+        [MT_DEVICE_WC] = {      /* ioremap_wc */
+                .prot_pte       = PROT_PTE_DEVICE | L_PTE_MT_DEV_WC,
                 .prot_l1        = PMD_TYPE_TABLE,
-                .prot_sect      = PROT_SECT_DEVICE | PMD_SECT_BUFFERABLE |
-                                  PMD_SECT_TEX(1),
+                .prot_sect      = PROT_SECT_DEVICE | PMD_SECT_BUFFERABLE,
                 .domain         = DOMAIN_IO,
         },
         [MT_CACHECLEAN] = {
@@ -253,7 +250,7 @@ static void __init build_mem_type_table(void)
 {
         struct cachepolicy *cp;
         unsigned int cr = get_cr();
-        unsigned int user_pgprot, kern_pgprot;
+        unsigned int user_pgprot, kern_pgprot, vecs_pgprot;
         int cpu_arch = cpu_architecture();
         int i;
 
@@ -271,6 +268,20 @@ static void __init build_mem_type_table(void)
                         cachepolicy = CPOLICY_WRITEBACK;
                 ecc_mask = 0;
         }
+#ifdef CONFIG_SMP
+        cachepolicy = CPOLICY_WRITEALLOC;
+#endif
+
+        /*
+         * On non-Xscale3 ARMv5-and-older systems, use CB=01
+         * (Uncached/Buffered) for ioremap_wc() mappings.  On XScale3
+         * and ARMv6+, use TEXCB=00100 mappings (Inner/Outer Uncacheable
+         * in xsc3 parlance, Uncached Normal in ARMv6 parlance).
+         */
+        if (cpu_is_xsc3() || cpu_arch >= CPU_ARCH_ARMv6) {
+                mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_TEX(1);
+                mem_types[MT_DEVICE_WC].prot_sect &= ~PMD_SECT_BUFFERABLE;
+        }
 
         /*
          * ARMv5 and lower, bit 4 must be set for page tables.
@@ -292,7 +303,15 @@ static void __init build_mem_type_table(void)
         }
 
         cp = &cache_policies[cachepolicy];
-        kern_pgprot = user_pgprot = cp->pte;
+        vecs_pgprot = kern_pgprot = user_pgprot = cp->pte;
+
+#ifndef CONFIG_SMP
+        /*
+         * Only use write-through for non-SMP systems
+         */
+        if (cpu_arch >= CPU_ARCH_ARMv5 && cachepolicy > CPOLICY_WRITETHROUGH)
+                vecs_pgprot = cache_policies[CPOLICY_WRITETHROUGH].pte;
+#endif
 
         /*
          * Enable CPU-specific coherency if supported.
@@ -320,7 +339,6 @@ static void __init build_mem_type_table(void)
                 /*
                  * Mark the device area as "shared device"
                  */
-                mem_types[MT_DEVICE].prot_pte |= L_PTE_BUFFERABLE;
                 mem_types[MT_DEVICE].prot_sect |= PMD_SECT_BUFFERED;
 
 #ifdef CONFIG_SMP
@@ -329,30 +347,21 @@ static void __init build_mem_type_table(void)
                  */
                 user_pgprot |= L_PTE_SHARED;
                 kern_pgprot |= L_PTE_SHARED;
+                vecs_pgprot |= L_PTE_SHARED;
                 mem_types[MT_MEMORY].prot_sect |= PMD_SECT_S;
 #endif
         }
 
         for (i = 0; i < 16; i++) {
                 unsigned long v = pgprot_val(protection_map[i]);
-                v = (v & ~(L_PTE_BUFFERABLE|L_PTE_CACHEABLE)) | user_pgprot;
-                protection_map[i] = __pgprot(v);
+                protection_map[i] = __pgprot(v | user_pgprot);
         }
 
-        mem_types[MT_LOW_VECTORS].prot_pte |= kern_pgprot;
-        mem_types[MT_HIGH_VECTORS].prot_pte |= kern_pgprot;
+        mem_types[MT_LOW_VECTORS].prot_pte |= vecs_pgprot;
+        mem_types[MT_HIGH_VECTORS].prot_pte |= vecs_pgprot;
 
-        if (cpu_arch >= CPU_ARCH_ARMv5) {
-#ifndef CONFIG_SMP
-                /*
-                 * Only use write-through for non-SMP systems
-                 */
-                mem_types[MT_LOW_VECTORS].prot_pte &= ~L_PTE_BUFFERABLE;
-                mem_types[MT_HIGH_VECTORS].prot_pte &= ~L_PTE_BUFFERABLE;
-#endif
-        } else {
+        if (cpu_arch < CPU_ARCH_ARMv5)
                 mem_types[MT_MINICLEAN].prot_sect &= ~PMD_SECT_TEX(1);
-        }
 
         pgprot_user   = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG | user_pgprot);
         pgprot_kernel = __pgprot(L_PTE_PRESENT | L_PTE_YOUNG |
@@ -400,8 +409,7 @@ static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr,
 
         pte = pte_offset_kernel(pmd, addr);
         do {
-                set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)),
-                            type->prot_pte_ext);
+                set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)), 0);
                 pfn++;
         } while (pte++, addr += PAGE_SIZE, addr != end);
 }
@@ -568,12 +576,35 @@ void __init iotable_init(struct map_desc *io_desc, int nr)
                 create_mapping(io_desc + i);
 }
 
+static unsigned long __initdata vmalloc_reserve = SZ_128M;
+
+/*
+ * 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.
+ */
+static void __init early_vmalloc(char **arg)
+{
+        vmalloc_reserve = memparse(*arg, arg);
+
+        if (vmalloc_reserve < SZ_16M) {
+                vmalloc_reserve = SZ_16M;
+                printk(KERN_WARNING
+                        "vmalloc area too small, limiting to %luMB\n",
+                        vmalloc_reserve >> 20);
+        }
+}
+__early_param("vmalloc=", early_vmalloc);
+
+#define VMALLOC_MIN     (void *)(VMALLOC_END - vmalloc_reserve)
+
 static int __init check_membank_valid(struct membank *mb)
 {
         /*
-         * Check whether this memory region has non-zero size.
+         * Check whether this memory region has non-zero size or
+         * invalid node number.
          */
-        if (mb->size == 0)
+        if (mb->size == 0 || mb->node >= MAX_NUMNODES)
                 return 0;
 
         /*
@@ -607,8 +638,7 @@ static int __init check_membank_valid(struct membank *mb)
 
 static void __init sanity_check_meminfo(struct meminfo *mi)
 {
-        int i;
-        int j;
+        int i, j;
 
         for (i = 0, j = 0; i < mi->nr_banks; i++) {
                 if (check_membank_valid(&mi->bank[i]))