Changes in kernel/arch/sparc32/src/mm/page.c [b6b02c0:ef9a2a8] in mainline

File:

• kernel/arch/sparc32/src/mm/page.c (modified) (1 diff)

kernel/arch/sparc32/src/mm/page.c

@@ -49 +49 @@
 #include <print.h>
 #include <interrupt.h>
+#include <macros.h>
 
 void page_arch_init(void)
 {
-        if (config.cpu_active == 1)
-                page_mapping_operations = &pt_mapping_operations;
+        int flags = PAGE_CACHEABLE | PAGE_EXEC;
+        page_mapping_operations = &pt_mapping_operations;
+
+        page_table_lock(AS_KERNEL, true);
+        
+        /* Kernel identity mapping */
+        //FIXME: We need to consider the possibility that
+        //identity_base > identity_size and physmem_end.
+        //This might lead to overflow if identity_size is too big.
+        for (uintptr_t cur = PHYSMEM_START_ADDR;
+            cur < min(KA2PA(config.identity_base) +
+                config.identity_size, config.physmem_end);
+            cur += FRAME_SIZE)
+                page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
+        
+
+        page_table_unlock(AS_KERNEL, true);
+        as_switch(NULL, AS_KERNEL);
+
+        printf("as_context_table=0x%08x\n", as_context_table);
+
+        /* Switch MMU to new context table */
+        asi_u32_write(ASI_MMUREGS, 0x100, KA2PA(as_context_table) >> 4);
+
+        //boot_page_table_free();
 }