X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Farm%2Fcpu%2Farm926ejs%2Fversatile%2Ftimer.c;fp=qemu%2Froms%2Fu-boot%2Farch%2Farm%2Fcpu%2Farm926ejs%2Fversatile%2Ftimer.c;h=5d694d85ef687586b7559fa635ae87ac69091d46;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/versatile/timer.c b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/versatile/timer.c
new file mode 100644
index 000000000..5d694d85e
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/arm926ejs/versatile/timer.c
@@ -0,0 +1,64 @@
+/*
+ * (C) Copyright 2003
+ * Texas Instruments <www.ti.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * (C) Copyright 2002-2004
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * (C) Copyright 2004
+ * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+#define TIMER_ENABLE	(1 << 7)
+#define TIMER_MODE_MSK	(1 << 6)
+#define TIMER_MODE_FR	(0 << 6)
+#define TIMER_MODE_PD	(1 << 6)
+
+#define TIMER_INT_EN	(1 << 5)
+#define TIMER_PRS_MSK	(3 << 2)
+#define TIMER_PRS_8S	(1 << 3)
+#define TIMER_SIZE_MSK	(1 << 2)
+#define TIMER_ONE_SHT	(1 << 0)
+
+int timer_init (void)
+{
+	ulong	tmr_ctrl_val;
+
+	/* 1st disable the Timer */
+	tmr_ctrl_val = *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8);
+	tmr_ctrl_val &= ~TIMER_ENABLE;
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val;
+
+	/*
+	 * The Timer Control Register has one Undefined/Shouldn't Use Bit
+	 * So we should do read/modify/write Operation
+	 */
+
+	/*
+	 * Timer Mode : Free Running
+	 * Interrupt : Disabled
+	 * Prescale : 8 Stage, Clk/256
+	 * Tmr Siz : 16 Bit Counter
+	 * Tmr in Wrapping Mode
+	 */
+	tmr_ctrl_val = *(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8);
+	tmr_ctrl_val &= ~(TIMER_MODE_MSK | TIMER_INT_EN | TIMER_PRS_MSK | TIMER_SIZE_MSK | TIMER_ONE_SHT );
+	tmr_ctrl_val |= (TIMER_ENABLE | TIMER_PRS_8S);
+
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = tmr_ctrl_val;
+
+	return 0;
+}
+