Initial landing of SMP support for FreeBSD/amd64.

- This is heavily derived from John Baldwin's apic/pci cleanup on i386.
- I have completely rewritten or drastically cleaned up some other parts.
  (in particular, bootstrap)
- This is still a WIP.  It seems that there are some highly bogus bioses
  on nVidia nForce3-150 boards.  I can't stress how broken these boards
  are.  I have a workaround in mind, but right now the Asus SK8N is broken.
  The Gigabyte K8NPro (nVidia based) is also mind-numbingly hosed.
- Most of my testing has been with SCHED_ULE.  SCHED_4BSD works.
- the apic and acpi components are 'standard'.
- If you have an nVidia nForce3-150 board, you are stuck with 'device
  atpic' in addition, because they somehow managed to forget to connect the
  8254 timer to the apic, even though its in the same silicon!  ARGH!
  This directly violates the ACPI spec.

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/amd64/include/segments.h b/sys/amd64/include/segments.h
index d924eb3..806e9d5 100644
--- a/sys/amd64/include/segments.h
+++ b/sys/amd64/include/segments.h
@@ -49,6 +49,7 @@
  * Selectors
  */
 
+#define	SEL_RPL_MASK	3	/* requester priv level */
 #define	ISPL(s)	((s)&3)		/* what is the priority level of a selector */
 #define	SEL_KPL	0		/* kernel priority level */
 #define	SEL_UPL	3		/* user priority level */
@@ -191,6 +192,7 @@ struct region_descriptor {
 #define	IDT_AC		17	/* #AC: Alignment Check */
 #define	IDT_MC		18	/* #MC: Machine Check */
 #define	IDT_XF		19	/* #XF: SIMD Floating-Point Exception */
+#define	IDT_IO_INTS	NRSVIDT	/* Base of IDT entries for I/O interrupts. */
 #define	IDT_SYSCALL	0x80	/* System Call Interrupt Vector */
 
 /*
@@ -210,6 +212,7 @@ struct region_descriptor {
 extern struct user_segment_descriptor gdt[];
 extern struct soft_segment_descriptor gdt_segs[];
 extern struct gate_descriptor *idt;
+extern struct region_descriptor r_gdt, r_idt;
 
 void	lgdt(struct region_descriptor *rdp);
 void	sdtossd(struct user_segment_descriptor *sdp,