Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 168 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/board/armltd/integrator/timer.c b/qemu/roms/u-boot/board/armltd/integrator/timer.c
new file mode 100644
index 000000000..14a52c460
--- /dev/null
+++ b/qemu/roms/u-boot/board/armltd/integrator/timer.c
@@ -0,0 +1,168 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <div64.h>
+
+#ifdef CONFIG_ARCH_CINTEGRATOR
+#define DIV_CLOCK_INIT	1
+#define TIMER_LOAD_VAL	0xFFFFFFFFL
+#else
+#define DIV_CLOCK_INIT	256
+#define TIMER_LOAD_VAL	0x0000FFFFL
+#endif
+/* The Integrator/CP timer1 is clocked at 1MHz
+ * can be divided by 16 or 256
+ * and can be set up as a 32-bit timer
+ */
+/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
+/* Keep total timer count to avoid losing decrements < div_timer */
+static unsigned long long total_count = 0;
+static unsigned long long lastdec;	 /* Timer reading at last call	   */
+/* Divisor applied to timer clock */
+static unsigned long long div_clock = DIV_CLOCK_INIT;
+static unsigned long long div_timer = 1; /* Divisor to convert timer reading
+					  * change to U-Boot ticks
+					  */
+/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
+static ulong timestamp;		/* U-Boot ticks since startup */
+
+#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
+
+/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
+ *  - unless otherwise stated
+ */
+
+/* starts up a counter
+ * - the Integrator/CP timer can be set up to issue an interrupt */
+int timer_init (void)
+{
+	/* Load timer with initial value */
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
+#ifdef CONFIG_ARCH_CINTEGRATOR
+	/* Set timer to be
+	 *	enabled		 1
+	 *	periodic	 1
+	 *	no interrupts	 0
+	 *	X		 0
+	 *	divider 1	00 == less rounding error
+	 *	32 bit		 1
+	 *	wrapping	 0
+	 */
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
+#else
+	/* Set timer to be
+	 *	enabled		 1
+	 *	free-running	 0
+	 *	XX		00
+	 *	divider 256	10
+	 *	XX		00
+	 */
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x00000088;
+#endif
+
+	/* init the timestamp */
+	total_count = 0ULL;
+	/* capure current decrementer value    */
+	lastdec	  = READ_TIMER;
+	/* start "advancing" time stamp from 0 */
+	timestamp = 0L;
+
+	div_timer = CONFIG_SYS_HZ_CLOCK;
+	do_div(div_timer, CONFIG_SYS_HZ);
+	do_div(div_timer, div_clock);
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+ulong get_timer (ulong base_ticks)
+{
+	return get_timer_masked () - base_ticks;
+}
+
+/* delay usec useconds */
+void __udelay (unsigned long usec)
+{
+	ulong tmo, tmp;
+
+	/* Convert to U-Boot ticks */
+	tmo  = usec * CONFIG_SYS_HZ;
+	tmo /= (1000000L);
+
+	tmp  = get_timer_masked();	/* get current timestamp */
+	tmo += tmp;			/* form target timestamp */
+
+	while (get_timer_masked () < tmo) {/* loop till event */
+		/*NOP*/;
+	}
+}
+
+/* converts the timer reading to U-Boot ticks	       */
+/* the timestamp is the number of ticks since reset    */
+ulong get_timer_masked (void)
+{
+	/* get current count */
+	unsigned long long now = READ_TIMER;
+
+	if(now > lastdec) {
+		/* Must have wrapped */
+		total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
+	} else {
+		total_count += lastdec - now;
+	}
+	lastdec	= now;
+
+	/* Reuse "now" */
+	now = total_count;
+	do_div(now, div_timer);
+	timestamp = now;
+
+	return timestamp;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+	udelay(usec);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * Return the timebase clock frequency
+ * i.e. how often the timer decrements
+ */
+ulong get_tbclk (void)
+{
+	unsigned long long tmp = CONFIG_SYS_HZ_CLOCK;
+
+	do_div(tmp, div_clock);
+
+	return tmp;
+}