Merge branch 'ptebits' into devel

Conflicts:

	arch/arm/Kconfig

1 files changed, 42 insertions, 32 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index e7af83e569d7..8ba754064559 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -66,27 +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,
         }
 };
 
@@ -184,29 +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] = {
@@ -251,7 +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;
 
@@ -269,6 +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.
@@ -290,7 +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.
@@ -318,7 +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
@@ -327,30 +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 |
@@ -398,8 +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);
 }