sparc64: Validate linear D-TLB misses.
[~shefty/rdma-dev.git] / arch / sparc / mm / init_64.c
index ed6be6ba2f4e9f7859c3e34b27fdc8e5ccc6f5ab..a70a5e1904d9d556e43fcd893b83752856d0cd3e 100644 (file)
@@ -145,7 +145,8 @@ static void __init read_obp_memory(const char *property,
             cmp_p64, NULL);
 }
 
-unsigned long *sparc64_valid_addr_bitmap __read_mostly;
+unsigned long sparc64_valid_addr_bitmap[VALID_ADDR_BITMAP_BYTES /
+                                       sizeof(unsigned long)];
 EXPORT_SYMBOL(sparc64_valid_addr_bitmap);
 
 /* Kernel physical address base and size in bytes.  */
@@ -1874,7 +1875,7 @@ static int pavail_rescan_ents __initdata;
  * memory list again, and make sure it provides at least as much
  * memory as 'pavail' does.
  */
-static void __init setup_valid_addr_bitmap_from_pavail(void)
+static void __init setup_valid_addr_bitmap_from_pavail(unsigned long *bitmap)
 {
        int i;
 
@@ -1897,8 +1898,7 @@ static void __init setup_valid_addr_bitmap_from_pavail(void)
 
                                if (new_start <= old_start &&
                                    new_end >= (old_start + PAGE_SIZE)) {
-                                       set_bit(old_start >> 22,
-                                               sparc64_valid_addr_bitmap);
+                                       set_bit(old_start >> 22, bitmap);
                                        goto do_next_page;
                                }
                        }
@@ -1919,20 +1919,21 @@ static void __init setup_valid_addr_bitmap_from_pavail(void)
        }
 }
 
+static void __init patch_tlb_miss_handler_bitmap(void)
+{
+       extern unsigned int valid_addr_bitmap_insn[];
+       extern unsigned int valid_addr_bitmap_patch[];
+
+       valid_addr_bitmap_insn[1] = valid_addr_bitmap_patch[1];
+       mb();
+       valid_addr_bitmap_insn[0] = valid_addr_bitmap_patch[0];
+       flushi(&valid_addr_bitmap_insn[0]);
+}
+
 void __init mem_init(void)
 {
        unsigned long codepages, datapages, initpages;
        unsigned long addr, last;
-       int i;
-
-       i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6);
-       i += 1;
-       sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3);
-       if (sparc64_valid_addr_bitmap == NULL) {
-               prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
-               prom_halt();
-       }
-       memset(sparc64_valid_addr_bitmap, 0, i << 3);
 
        addr = PAGE_OFFSET + kern_base;
        last = PAGE_ALIGN(kern_size) + addr;
@@ -1941,15 +1942,19 @@ void __init mem_init(void)
                addr += PAGE_SIZE;
        }
 
-       setup_valid_addr_bitmap_from_pavail();
+       setup_valid_addr_bitmap_from_pavail(sparc64_valid_addr_bitmap);
+       patch_tlb_miss_handler_bitmap();
 
        high_memory = __va(last_valid_pfn << PAGE_SHIFT);
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
-       for_each_online_node(i) {
-               if (NODE_DATA(i)->node_spanned_pages != 0) {
-                       totalram_pages +=
-                               free_all_bootmem_node(NODE_DATA(i));
+       {
+               int i;
+               for_each_online_node(i) {
+                       if (NODE_DATA(i)->node_spanned_pages != 0) {
+                               totalram_pages +=
+                                       free_all_bootmem_node(NODE_DATA(i));
+                       }
                }
        }
 #else