Initial checkin for supermicro p4dc6

This also includes a bunch of my pending work including
- Updated serial code so we can compile in different serial port speeds
- Updates to the build system so that:
  - Makefile.settings holds all of the settings of the config variables
  - ldoptions and cpuflags are generated automatically with perl scripts
  - src/config/Config holds all of the architecture neutral make file settings
- Initial work on the P4 including how to use cache as ram
- Update to the ioapic code for the P4 because it delivers irqs on the system
  bus instead of an out of band bus
- Updated version of printf that doesn't need an intermediate buffer
  - logbuf_subr now handles the case when we want to use a log buffer
- video_subr handles the preliminary code for writing to a video device.
- Pending changes for the L440GX are merged in as well (hopefully I haven't
  messed then up since they were written).

src/superio/winbond/w83627hf/setup_serial.inc

@@ -8,41 +8,50 @@
 #define SIO_INDEX SIO_BASE
 #define SIO_DATA  SIO_BASE+1
 
+#define SIO_SYSTEM_CLK_INPUT_48MHZ	(1<<6)
+#define SIO_SYSTEM_CLK_INPUT_24MHZ	(0<<6)
+
+#if defined(SIO_SYSTEM_CLK_INPUT)
+#if (SIO_SYSTEM_CLK_INPUT != SIO_SYSTEM_CLK_INPUT_48MHZ) &&  (SIO_SYSTEM_CLK_INPUT != SIO_SYSTEM_CLK_INPUT_24MHZ) 
+#error BAD SIO_SYSTEM_CLK_INPUT_PARAMETER
+#endif
+#endif
+
+
 #define SIO_COM1_DEVICE 2
 
 #define SIO_ENTER_PNP_MODE() \
-	movw	$SIO_BASE, %dx	; \
-	movb	$0x87, %al	; \
-	outb	%al, %dx	; \
-	outb	%al, %dx
+	movb	$0x87, %al		; \
+	outb	%al, $(SIO_BASE)	; \
+	outb	%al, $(SIO_BASE)
 
 
 #define SIO_EXIT_PNP_MODE() \
-	movw	$SIO_BASE, %dx	; \
-	movb	$0xaa, %al	; \
-	outb	%al, %dx
+	movb	$0xaa, %al		; \
+	outb	%al, $(SIO_BASE)
 
 #define SIO_WRITE_CONFIG(value, reg) \
-	movw	$SIO_BASE, %dx	; \
-	movb	$reg, %al	; \
-	outb	%al, %dx	; \
-	incw	%dx		; \
-	movb	$value, %al	; \
-	outb	%al, %dx
+	movb	$reg, %al		; \
+	outb	%al, $(SIO_INDEX)	; \
+	movb	$value, %al		; \
+	outb	%al, $(SIO_DATA)
 
 #define SIO_READ_CONFIG(value, reg) \
-	movw	$SIO_BASE, %dx	; \
-	movb	$reg, %al	; \
-	outb	%al, %dx	; \
-	incw	%dx		; \
-	inb	%al, %dx
+	movb	$reg, %al		; \
+	outb	%al, $(SIO_INDEX)	; \
+	inb	%al, $(SIO_DATA)
 
 #define SIO_SET_LOGICAL_DEVICE(device) \
 	SIO_WRITE_CONFIG(device, 0x07)
 
-
-	/* enable serial 1 */
+	/* Enable pnp */
 	SIO_ENTER_PNP_MODE()
+
+#if defined(SIO_SYSTEM_CLK_INPUT)
+	/* Setup up the clock input */
+	SIO_WRITE_CONFIG(0x84 | SIO_SYSTEM_CLK_INPUT), 0x24)
+#endif
+	/* enable serial 1 */
 	SIO_SET_LOGICAL_DEVICE(SIO_COM1_DEVICE)
 	SIO_WRITE_CONFIG(1, 0x30)
 	SIO_WRITE_CONFIG(0x3, 0x60)

src/superio/winbond/w83627hf/superio.c

@@ -249,8 +249,6 @@ static void enable_devices(struct superio *sio)
 	setup_acpi_registers(sio);
 #endif
 
-	// what's this.
-	write_config(sio, 1, 0x30);
 	exit_pnp(sio);
 }