Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[powerpc.git] / arch / arm / mm / mm-armv.c

diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index f5a87db..2c2b93d 100644 (file)
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -37,6 +37,8 @@ pgprot_t pgprot_kernel;
 
 EXPORT_SYMBOL(pgprot_kernel);
 
+pmd_t *top_pmd;
+
 struct cachepolicy {
        const char      policy[16];
        unsigned int    cr_mask;
@@ -142,6 +144,16 @@ __setup("noalign", noalign_setup);
 
 #define FIRST_KERNEL_PGD_NR    (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
 
+static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
+{
+       return pmd_offset(pgd, virt);
+}
+
+static inline pmd_t *pmd_off_k(unsigned long virt)
+{
+       return pmd_off(pgd_offset_k(virt), virt);
+}
+
 /*
  * need to get a 16k page for level 1
  */
@@ -220,7 +232,7 @@ void free_pgd_slow(pgd_t *pgd)
                return;
 
        /* pgd is always present and good */
-       pmd = (pmd_t *)pgd;
+       pmd = pmd_off(pgd, 0);
        if (pmd_none(*pmd))
                goto free;
        if (pmd_bad(*pmd)) {
@@ -246,9 +258,8 @@ free:
 static inline void
 alloc_init_section(unsigned long virt, unsigned long phys, int prot)
 {
-       pmd_t *pmdp;
+       pmd_t *pmdp = pmd_off_k(virt);
 
-       pmdp = pmd_offset(pgd_offset_k(virt), virt);
        if (virt & (1 << 20))
                pmdp++;
 
@@ -283,11 +294,9 @@ alloc_init_supersection(unsigned long virt, unsigned long phys, int prot)
 static inline void
 alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pgprot_t prot)
 {
-       pmd_t *pmdp;
+       pmd_t *pmdp = pmd_off_k(virt);
        pte_t *ptep;
 
-       pmdp = pmd_offset(pgd_offset_k(virt), virt);
-
        if (pmd_none(*pmdp)) {
                unsigned long pmdval;
                ptep = alloc_bootmem_low_pages(2 * PTRS_PER_PTE *
@@ -310,7 +319,7 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg
  */
 static inline void clear_mapping(unsigned long virt)
 {
-       pmd_clear(pmd_offset(pgd_offset_k(virt), virt));
+       pmd_clear(pmd_off_k(virt));
 }
 
 struct mem_types {
@@ -411,9 +420,10 @@ static void __init build_mem_type_table(void)
                mem_types[MT_MEMORY].prot_sect &= ~PMD_BIT4;
                mem_types[MT_ROM].prot_sect &= ~PMD_BIT4;
                /*
-                * Mark cache clean areas read only from SVC mode
-                * and no access from userspace.
+                * Mark cache clean areas and XIP ROM read only
+                * from SVC mode and no access from userspace.
                 */
+               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;
        }
@@ -577,7 +587,7 @@ void setup_mm_for_reboot(char mode)
                         PMD_TYPE_SECT;
                if (cpu_arch <= CPU_ARCH_ARMv5)
                        pmdval |= PMD_BIT4;
-               pmd = pmd_offset(pgd + i, i << PGDIR_SHIFT);
+               pmd = pmd_off(pgd, i << PGDIR_SHIFT);
                pmd[0] = __pmd(pmdval);
                pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));
                flush_pmd_entry(pmd);
@@ -674,6 +684,8 @@ void __init memtable_init(struct meminfo *mi)
 
        flush_cache_all();
        flush_tlb_all();
+
+       top_pmd = pmd_off_k(0xffff0000);
 }
 
 /*