Start of merge from work on the AMD760MP platform.

This is the safe part just additions to files, and comment changes

src/lib/delay.c

@@ -0,0 +1,63 @@
+#include <delay.h>
+#include <arch/io.h>
+
+/* Ports for the 8254 timer chip */
+#define	TIMER2_PORT	0x42
+#define	TIMER_MODE_PORT	0x43
+
+/* Meaning of the mode bits */
+#define	TIMER0_SEL	0x00
+#define	TIMER1_SEL	0x40
+#define	TIMER2_SEL	0x80
+#define	READBACK_SEL	0xC0
+
+#define	LATCH_COUNT	0x00
+#define	LOBYTE_ACCESS	0x10
+#define	HIBYTE_ACCESS	0x20
+#define	WORD_ACCESS	0x30
+
+#define	MODE0		0x00
+#define	MODE1		0x02
+#define	MODE2		0x04
+#define	MODE3		0x06
+#define	MODE4		0x08
+#define	MODE5		0x0A
+
+#define	BINARY_COUNT	0x00
+#define	BCD_COUNT	0x01
+
+/* Timers tick over at this rate */
+#define	TICKS_PER_MS	1193
+
+/* Parallel Peripheral Controller Port B */
+#define	PPC_PORTB	0x61
+
+/* Meaning of the port bits */
+#define	PPCB_T2OUT	0x20	/* Bit 5 */
+#define	PPCB_SPKR	0x02	/* Bit 1 */
+#define	PPCB_T2GATE	0x01	/* Bit 0 */
+
+
+static void load_timer2(unsigned int ticks)
+{
+	/* Set up the timer gate, turn off the speaker */
+	outb((inb(PPC_PORTB) & ~PPCB_SPKR) | PPCB_T2GATE, PPC_PORTB);
+	outb(TIMER2_SEL|WORD_ACCESS|MODE0|BINARY_COUNT, TIMER_MODE_PORT);
+	outb(ticks & 0xFF, TIMER2_PORT);
+	outb(ticks >> 8, TIMER2_PORT);
+}
+
+
+void udelay(int usecs)
+{
+	load_timer2((usecs*TICKS_PER_MS)/1000);
+	while ((inb(PPC_PORTB) & PPCB_T2OUT) == 0)
+		;
+}
+void mdelay(int msecs)
+{
+	int i;
+	for(i = 0; i < msecs; i++) {
+		udelay(1000);
+	}
+}