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https://github.com/AsahiLinux/u-boot
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94a3312920
Fixing the get_timer function to return time in miliseconds instead of ticks. Also fixed PXA boards to use the conventional value of 1000 for CONFIG_SYS_HZ. Signed-off-by: Micha Kalfon <smichak.uv@gmail.com>
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/arch/pxa-regs.h>
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#ifdef CONFIG_USE_IRQ
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#error: interrupts not implemented yet
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#endif
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#if defined(CONFIG_PXA27X) || defined(CONFIG_CPU_MONAHANS)
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#define TIMER_FREQ_HZ 3250000
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#elif defined(CONFIG_PXA250)
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#define TIMER_FREQ_HZ 3686400
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#else
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#error "Timer frequency unknown - please config PXA CPU type"
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#endif
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int interrupt_init (void)
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{
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/* nothing happens here - we don't setup any IRQs */
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return (0);
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}
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void reset_timer (void)
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{
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reset_timer_masked ();
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}
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ulong get_timer (ulong base)
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{
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return get_timer_masked () - base;
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}
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void set_timer (ulong t)
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{
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/* nop */
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}
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void udelay (unsigned long usec)
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{
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udelay_masked (usec);
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}
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void reset_timer_masked (void)
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{
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OSCR = 0;
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}
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ulong get_timer_masked (void)
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{
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unsigned long long ticks = get_ticks();
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return (((ticks / TIMER_FREQ_HZ) * 1000) +
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((ticks % TIMER_FREQ_HZ) * 1000) / TIMER_FREQ_HZ);
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}
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void udelay_masked (unsigned long usec)
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{
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ulong tmo;
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ulong endtime;
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signed long diff;
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if (usec >= 1000) {
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tmo = usec / 1000;
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tmo *= TIMER_FREQ_HZ;
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tmo /= 1000;
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} else {
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tmo = usec * TIMER_FREQ_HZ;
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tmo /= (1000*1000);
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}
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endtime = get_ticks() + tmo;
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do {
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ulong now = get_ticks();
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diff = endtime - now;
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} while (diff >= 0);
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}
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/*
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* This function is derived from PowerPC code (read timebase as long long).
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* On ARM it just returns the timer value.
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*/
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unsigned long long get_ticks(void)
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{
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return OSCR;
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}
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/*
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* This function is derived from PowerPC code (timebase clock frequency).
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* On ARM it returns the number of timer ticks per second.
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*/
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ulong get_tbclk (void)
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{
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ulong tbclk;
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tbclk = TIMER_FREQ_HZ;
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return tbclk;
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}
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