110 lines
3.5 KiB
C
110 lines
3.5 KiB
C
/*
|
|
* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
|
|
* reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the NetLogic
|
|
* license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/time.h>
|
|
#include <asm/cpu-features.h>
|
|
|
|
#include <asm/netlogic/interrupt.h>
|
|
#include <asm/netlogic/common.h>
|
|
#include <asm/netlogic/haldefs.h>
|
|
|
|
#if defined(CONFIG_CPU_XLP)
|
|
#include <asm/netlogic/xlp-hal/iomap.h>
|
|
#include <asm/netlogic/xlp-hal/xlp.h>
|
|
#include <asm/netlogic/xlp-hal/sys.h>
|
|
#include <asm/netlogic/xlp-hal/pic.h>
|
|
#elif defined(CONFIG_CPU_XLR)
|
|
#include <asm/netlogic/xlr/iomap.h>
|
|
#include <asm/netlogic/xlr/pic.h>
|
|
#include <asm/netlogic/xlr/xlr.h>
|
|
#else
|
|
#error "Unknown CPU"
|
|
#endif
|
|
|
|
unsigned int get_c0_compare_int(void)
|
|
{
|
|
return IRQ_TIMER;
|
|
}
|
|
|
|
static cycle_t nlm_get_pic_timer(struct clocksource *cs)
|
|
{
|
|
uint64_t picbase = nlm_get_node(0)->picbase;
|
|
|
|
return ~nlm_pic_read_timer(picbase, PIC_CLOCK_TIMER);
|
|
}
|
|
|
|
static cycle_t nlm_get_pic_timer32(struct clocksource *cs)
|
|
{
|
|
uint64_t picbase = nlm_get_node(0)->picbase;
|
|
|
|
return ~nlm_pic_read_timer32(picbase, PIC_CLOCK_TIMER);
|
|
}
|
|
|
|
static struct clocksource csrc_pic = {
|
|
.name = "PIC",
|
|
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
|
|
};
|
|
|
|
static void nlm_init_pic_timer(void)
|
|
{
|
|
uint64_t picbase = nlm_get_node(0)->picbase;
|
|
u32 picfreq;
|
|
|
|
nlm_pic_set_timer(picbase, PIC_CLOCK_TIMER, ~0ULL, 0, 0);
|
|
if (current_cpu_data.cputype == CPU_XLR) {
|
|
csrc_pic.mask = CLOCKSOURCE_MASK(32);
|
|
csrc_pic.read = nlm_get_pic_timer32;
|
|
} else {
|
|
csrc_pic.mask = CLOCKSOURCE_MASK(64);
|
|
csrc_pic.read = nlm_get_pic_timer;
|
|
}
|
|
csrc_pic.rating = 1000;
|
|
picfreq = pic_timer_freq();
|
|
clocksource_register_hz(&csrc_pic, picfreq);
|
|
pr_info("PIC clock source added, frequency %d\n", picfreq);
|
|
}
|
|
|
|
void __init plat_time_init(void)
|
|
{
|
|
nlm_init_pic_timer();
|
|
mips_hpt_frequency = nlm_get_cpu_frequency();
|
|
if (current_cpu_type() == CPU_XLR)
|
|
preset_lpj = mips_hpt_frequency / (3 * HZ);
|
|
else
|
|
preset_lpj = mips_hpt_frequency / (2 * HZ);
|
|
pr_info("MIPS counter frequency [%ld]\n",
|
|
(unsigned long)mips_hpt_frequency);
|
|
}
|