kern: vm: Implement page mapping and VASes

This commit implements an interface to allow other parts of Lunos to
talk to the MMU:

- Added the 'vas' structure as the virtual address space
- Added MMU specific prot flags
- Added mmu_map_single() to map pages
- Added mmu_this_vas() to grab the current VAS
...

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/sys/vm/vm_init.c b/src/sys/vm/vm_init.c
index c8137a9..77b0a21 100644
--- a/src/sys/vm/vm_init.c
+++ b/src/sys/vm/vm_init.c
@@ -28,15 +28,19 @@
  */
 
 #include <sys/panic.h>
+#include <sys/cpuvar.h>
 #include <vm/vm.h>
 #include <vm/physseg.h>
 #include <machine/mmu.h>    /* standard */
 
 static struct physmem_stat stat;
+struct vm_vas g_kvas;
 
 void
 vm_init(void)
 {
+    struct pcore *pcore = this_core();
+
     if (vm_seg_init(&stat) < 0) {
         panic("vm_init: vm_seg_init() failed\n");
     }