5113f6f70
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kernel add
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/*
* 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
", 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]
",
(unsigned long)mips_hpt_frequency);
}
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