Local APIC

- local APIC timer used as the source of time

- PIC is still used as the hw interrupt controller as we don't have
  enough info without ACPI or MPS to set up IO APICs

- remapping of APIC when switching paging on, uses the new mechanism
  to tell VM what phys areas to map in kernel's virtual space

- one more step to SMP

based on code by Arun C.

include/sys/vm_i386.h

@@ -70,7 +70,9 @@ sys/vm_i386.h
 #define I386_VM_PFE_U	0x04	/* CPU in user mode (otherwise supervisor) */
 
 /* CPUID flags */
-#define CPUID1_EDX_PSE (1L <<  3)	/* Page Size Extension */
-#define CPUID1_EDX_PGE (1L << 13)	/* Page Global (bit) Enable */
+#define CPUID1_EDX_PSE 		(1L <<  3)	/* Page Size Extension */
+#define CPUID1_EDX_PGE 		(1L << 13)	/* Page Global (bit) Enable */
+#define CPUID1_EDX_APIC_ON_CHIP (1L << 9)	/* APIC is present on the chip */
+#define CPUID1_EDX_TSC		(1L << 4)	/* Timestamp counter present */
 
 #endif /* __SYS_VM_386_H__ */