/* * (C) Copyright 2006 * Stefan Roese, DENX Software Engineering, sr@denx.de. * * (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> * * 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 <common.h> #include <asm/arch/ixp425.h> ulong get_timer (ulong base) { return get_timer_masked () - base; } void ixp425_udelay(unsigned long usec) { /* * This function has a max usec, but since it is called from udelay * we should not have to worry... be happy */ unsigned long usecs = CONFIG_SYS_HZ/1000000L & ~IXP425_OST_RELOAD_MASK; *IXP425_OSST = IXP425_OSST_TIMER_1_PEND; usecs |= IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE; *IXP425_OSRT1 = usecs; while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND)); } void udelay (unsigned long usec) { while (usec--) ixp425_udelay(1); } static ulong reload_constant = 0xfffffff0; void reset_timer_masked (void) { ulong reload = reload_constant | IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE; *IXP425_OSST = IXP425_OSST_TIMER_1_PEND; *IXP425_OSRT1 = reload; } ulong get_timer_masked (void) { /* * Note that it is possible for this to wrap! * In this case we return max. */ ulong current = *IXP425_OST1; if (*IXP425_OSST & IXP425_OSST_TIMER_1_PEND) { return reload_constant; } return (reload_constant - current); }