Changeset 20d50a1 in mainline for generic/src/main/kinit.c

Timestamp:

2006-01-13T13:02:45Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f9425006

Parents:

0369911

Message:

Memory management work.

• vm.* → as.* (as like address space is, imho, more fitting)
• Don't do TLB shootdown on vm_install(). Some architectures only need to call tlb_invalidate_asid().
• Don't allocate all frames for as_area in as_area_create(), but let them be allocated on-demand by as_page_fault().
• Add high-level page fault handler as_page_fault().
• Add as_area_load_mapping().

File:

• generic/src/main/kinit.c (modified) (4 diffs)

generic/src/main/kinit.c

@@ -40 +40 @@
 #include <mm/page.h>
 #include <arch/mm/page.h>
-#include <mm/vm.h>
+#include <mm/as.h>
 #include <mm/frame.h>
 #include <print.h>
@@ -71 +71 @@
         thread_t *t;
 #ifdef CONFIG_USERSPACE
-        vm_t *m;
-        vm_area_t *a;
+        as_t *as;
+        as_area_t *a;
+        __address frame;
+        index_t pfn[1];
         task_t *u;
 #endif
@@ -142 +144 @@
          * Create the first user task.
          */
-        m = vm_create(NULL);
-        if (!m)
-                panic("vm_create\n");
-        u = task_create(m);
+        as = as_create(NULL);
+        if (!as)
+                panic("as_create\n");
+        u = task_create(as);
         if (!u)
                 panic("task_create\n");
@@ -153 +155 @@
 
         /*
-         * Create the text vm_area and copy the userspace code there.
+         * Create the text as_area and copy the userspace code there.
          */     
-        a = vm_area_create(m, VMA_TEXT, 1, UTEXT_ADDRESS);
+        a = as_area_create(as, AS_AREA_TEXT, 1, UTEXT_ADDRESS);
         if (!a)
-                panic("vm_area_create: vm_text\n");
-        vm_area_map(a, m);
+                panic("as_area_create: text\n");
+
+        frame = frame_alloc(0, ONE_FRAME, NULL);
+
         if (config.init_size > 0)
-                memcpy((void *) PA2KA(a->mapping[0]), (void *) config.init_addr, config.init_size < PAGE_SIZE ? config.init_size : PAGE_SIZE);
+                memcpy((void *) PA2KA(frame), (void *) config.init_addr, config.init_size < PAGE_SIZE ? config.init_size : PAGE_SIZE);
         else
-                memcpy((void *) PA2KA(a->mapping[0]), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
+                memcpy((void *) PA2KA(frame), (void *) utext, utext_size < PAGE_SIZE ? utext_size : PAGE_SIZE);
+        
+        pfn[0] = frame / FRAME_SIZE;
+        as_area_load_mapping(a, pfn);
 
         /*
-         * Create the data vm_area.
+         * Create the data as_area.
          */
-        a = vm_area_create(m, VMA_STACK, 1, USTACK_ADDRESS);
+        a = as_area_create(as, AS_AREA_STACK, 1, USTACK_ADDRESS);
         if (!a)
-                panic("vm_area_create: vm_stack\n");
-        vm_area_map(a, m);
+                panic("as_area_create: stack\n");
         
         thread_ready(t);