changed loops to use halt instead of while(1);

diff --git a/geekos/src/geekos/lowlevel.asm b/geekos/src/geekos/lowlevel.asm
index 2c64e8a..c8d0b8d 100644 (file)
--- a/geekos/src/geekos/lowlevel.asm
+++ b/geekos/src/geekos/lowlevel.asm
@@ -160,6 +160,9 @@ EXPORT Get_ESP
 ; EBP
 EXPORT Get_EBP
 
+; Halt machine
+EXPORT Halt
+
 ; Virtual memory support.
 EXPORT Enable_Paging
 EXPORT Set_PDBR
@@ -381,6 +384,11 @@ Get_MSR:
 
 
 align 8
+Halt:
+       hlt
+
+
+align 8
 Get_CR2:
        mov     eax, cr2
        ret

diff --git a/geekos/src/geekos/main.c b/geekos/src/geekos/main.c
index 5d71341..1fbd1c9 100644 (file)
--- a/geekos/src/geekos/main.c
+++ b/geekos/src/geekos/main.c
@@ -47,11 +47,12 @@
 
 
 
+extern void Halt();
 
 void Spin()
 {
   // hack - competing thread
-  while (1) {};
+  while (1) {Halt();};
 
 }
 
@@ -276,7 +277,7 @@ void Main(struct Boot_Info* bootInfo)
 
 
   SerialPrint("RunVMM returned, spinning\n");
-  while (1) {} 
+  while (1) {Halt();} 
 
 
   TODO("Write a Virtual Machine Monitor");