From 3c7e939c3e18b3d286c084ff95266611a0150ca1 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sun, 26 May 2013 07:15:57 -0700 Subject: beaglebone: initial Kconfig and Makefiles Initial structure of Beaglebone port Change-Id: Ia255ab207f424dcd525990cdc0d74953e012c087 Signed-off-by: David Hendricks Signed-off-by: Gabe Black Reviewed-on: http://review.coreboot.org/3279 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich --- src/cpu/ti/am335x/timer.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/cpu/ti/am335x/timer.c (limited to 'src/cpu/ti/am335x/timer.c') diff --git a/src/cpu/ti/am335x/timer.c b/src/cpu/ti/am335x/timer.c new file mode 100644 index 0000000000..07b162a0ee --- /dev/null +++ b/src/cpu/ti/am335x/timer.c @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2013 Google Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include + +void init_timer(void) +{ +} + +/* delay x useconds */ +void udelay(unsigned usec) +{ + struct mono_time current, end; + + timer_monotonic_get(¤t); + end = current; + mono_time_add_usecs(&end, usec); + + if (mono_time_after(¤t, &end)) { + printk(BIOS_EMERG, "udelay: 0x%08x is impossibly large\n", + usec); + /* There's not much we can do if usec is too big. Use a long, + * paranoid delay value and hope for the best... */ + end = current; + mono_time_add_usecs(&end, USECS_PER_SEC); + } + + while (mono_time_before(¤t, &end)) + timer_monotonic_get(¤t); +} -- cgit v1.2.3