patch-2.1.80 linux/include/asm-arm/arch-ebsa110/time.h

• Lines: 90
• Date: Tue Jan 20 16:39:42 1998
• Orig file: v2.1.79/linux/include/asm-arm/arch-ebsa110/time.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/include/asm-arm/arch-ebsa110/time.h linux/include/asm-arm/arch-ebsa110/time.h
@@ -0,0 +1,89 @@
+/*
+ * linux/include/asm-arm/arch-ebsa110/time.h
+ *
+ * Copyright (c) 1996,1997,1998 Russell King.
+ *
+ * No real time clock on the evalulation board!
+ *
+ * Changelog:
+ *  10-Oct-1996	RMK	Created
+ *  04-Dec-1997	RMK	Updated for new arch/arm/time.c
+ */
+
+#define MCLK_47_8
+
+#if defined(MCLK_42_3)
+#define PIT1_COUNT 0xecbe
+#elif defined(MCLK_47_8)
+/*
+ * This should be 0x10AE1, but that doesn't exactly fit.
+ * We run the timer interrupt at 5ms, and then divide it by
+ * two in software...  This is so that the user processes
+ * see exactly the same model whichever ARM processor they're
+ * running on.
+ */
+#define PIT1_COUNT 0x8570
+#define DIVISOR 2
+#endif
+ 
+extern __inline__ unsigned long gettimeoffset (void)
+{
+	return 0;
+}
+
+#ifndef DIVISOR
+extern __inline__ int reset_timer (void)
+{
+	*PIT_T1 = (PIT1_COUNT) & 0xff;
+	*PIT_T1 = (PIT1_COUNT) >> 8;
+	return 1;
+}
+#else
+extern __inline__ int reset_timer (void)
+{
+	static unsigned int divisor;
+	static int count = 50;
+
+	*PIT_T1 = (PIT1_COUNT) & 0xff;
+	*PIT_T1 = (PIT1_COUNT) >> 8;
+
+	if (--count == 0) {
+		count = 50;
+		*(volatile unsigned char *)0xf2400000 ^= 128;
+	}
+
+	if (divisor == 0) {
+		divisor = DIVISOR - 1;
+		return 1;
+	}
+	divisor -= 1;
+	return 0;
+}
+#endif
+
+/*
+ * We don't have a RTC to update!
+ */
+#define update_rtc()
+
+/*
+ * Set up timer interrupt, and return the current time in seconds.
+ */
+extern __inline__ unsigned long setup_timer (void)
+{
+	/*
+	 * Timer 1, mode 0, 16-bit, autoreload
+	 */
+	*PIT_CTRL = 0x70;
+	/*
+	 * Refresh counter clocked at 47.8MHz/7 = 146.4ns
+	 * We want centi-second interrupts
+	 */
+	reset_timer ();
+	/*
+	 * Default the date to 1 Jan 1970 0:0:0
+	 * You will have to run a time daemon to set the
+	 * clock correctly at bootup
+	 */
+	return mktime(1970, 1, 1, 0, 0, 0);
+}