kernel: cleanup the software mouse cursor mess

[plan9front.git] / sys / src / 9 / pc / mmu.c

diff --git a/sys/src/9/pc/mmu.c b/sys/src/9/pc/mmu.c
index c76c8962b75451541ba098b5192a761027b81dc0..c0b13674a6cab1083b782d7c4dbcb4480ac96416 100644 (file)
--- a/sys/src/9/pc/mmu.c
+++ b/sys/src/9/pc/mmu.c
@@ -523,17 +523,8 @@ mmuwalk(ulong* pdb, ulong va, int level, int create)
                if(*table & PTESIZE)
                        panic("mmuwalk2: va %luX entry %luX", va, *table);
                if(!(*table & PTEVALID)){
-                       /*
-                        * Have to call low-level allocator from
-                        * memory.c if we haven't set up the xalloc
-                        * tables yet.
-                        */
-                       if(conf.mem[0].npage != 0)
-                               map = xspanalloc(BY2PG, BY2PG, 0);
-                       else
-                               map = rampage();
-                       if(map == nil)
-                               panic("mmuwalk xspanalloc failed");
+                       map = rampage();
+                       memset(map, 0, BY2PG);
                        *table = PADDR(map)|PTEWRITE|PTEVALID;
                }
                table = KADDR(PPN(*table));
@@ -552,6 +543,7 @@ static Lock vmaplock;
 
 static int findhole(ulong *a, int n, int count);
 static ulong vmapalloc(ulong size);
+static int pdbmap(ulong *, ulong, ulong, int);
 static void pdbunmap(ulong*, ulong, int);
 
 /*
@@ -651,10 +643,7 @@ vmapalloc(ulong size)
 void
 vunmap(void *v, int size)
 {
-       int i;
        ulong va, o;
-       Mach *nm;
-       Proc *p;
        
        /*
         * might not be aligned
@@ -683,31 +672,14 @@ vunmap(void *v, int size)
                putcr3(PADDR(MACHP(0)->pdb));
                return;
        }
-       for(i=0; i<conf.nproc; i++){
-               p = proctab(i);
-               if(p->state == Dead)
-                       continue;
-               if(p != up)
-                       p->newtlb = 1;
-       }
-       for(i=0; i<conf.nmach; i++){
-               nm = MACHP(i);
-               if(nm != m)
-                       nm->flushmmu = 1;
-       }
+       procflushothers();
        flushmmu();
-       for(i=0; i<conf.nmach; i++){
-               nm = MACHP(i);
-               if(nm != m)
-                       while(active.machs[nm->machno] && nm->flushmmu)
-                               ;
-       }
 }
 
 /*
  * Add kernel mappings for pa -> va for a section of size bytes.
  */
-int
+static int
 pdbmap(ulong *pdb, ulong pa, ulong va, int size)
 {
        int pse;
@@ -777,6 +749,19 @@ pdbunmap(ulong *pdb, ulong va, int size)
        }
 }
 
+void
+pmap(ulong pa, ulong va, int size)
+{
+       pdbmap(MACHP(0)->pdb, pa, va, size);
+}
+
+void
+punmap(ulong va, int size)
+{
+       pdbunmap(MACHP(0)->pdb, va, size);
+       mmuflushtlb(PADDR(m->pdb));
+}
+
 /*
  * Handle a fault by bringing vmap up to date.
  * Only copy pdb entries and they never go away,