111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
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/*
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* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
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* reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the NetLogic
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/init.h>
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#include <asm/time.h>
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#include <asm/cpu-features.h>
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#include <asm/netlogic/interrupt.h>
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#include <asm/netlogic/common.h>
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#include <asm/netlogic/haldefs.h>
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#if defined(CONFIG_CPU_XLP)
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#include <asm/netlogic/xlp-hal/iomap.h>
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#include <asm/netlogic/xlp-hal/xlp.h>
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#include <asm/netlogic/xlp-hal/sys.h>
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#include <asm/netlogic/xlp-hal/pic.h>
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#elif defined(CONFIG_CPU_XLR)
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#include <asm/netlogic/xlr/iomap.h>
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#include <asm/netlogic/xlr/pic.h>
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#include <asm/netlogic/xlr/xlr.h>
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#else
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#error "Unknown CPU"
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#endif
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unsigned int get_c0_compare_int(void)
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{
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return IRQ_TIMER;
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}
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static u64 nlm_get_pic_timer(struct clocksource *cs)
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{
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uint64_t picbase = nlm_get_node(0)->picbase;
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return ~nlm_pic_read_timer(picbase, PIC_CLOCK_TIMER);
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}
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static u64 nlm_get_pic_timer32(struct clocksource *cs)
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{
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uint64_t picbase = nlm_get_node(0)->picbase;
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return ~nlm_pic_read_timer32(picbase, PIC_CLOCK_TIMER);
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}
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static struct clocksource csrc_pic = {
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.name = "PIC",
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.flags = CLOCK_SOURCE_IS_CONTINUOUS,
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};
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static void nlm_init_pic_timer(void)
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{
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uint64_t picbase = nlm_get_node(0)->picbase;
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u32 picfreq;
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nlm_pic_set_timer(picbase, PIC_CLOCK_TIMER, ~0ULL, 0, 0);
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if (current_cpu_data.cputype == CPU_XLR) {
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csrc_pic.mask = CLOCKSOURCE_MASK(32);
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csrc_pic.read = nlm_get_pic_timer32;
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} else {
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csrc_pic.mask = CLOCKSOURCE_MASK(64);
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csrc_pic.read = nlm_get_pic_timer;
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}
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csrc_pic.rating = 1000;
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picfreq = pic_timer_freq();
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clocksource_register_hz(&csrc_pic, picfreq);
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pr_info("PIC clock source added, frequency %d\n", picfreq);
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}
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void __init plat_time_init(void)
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{
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nlm_init_pic_timer();
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mips_hpt_frequency = nlm_get_cpu_frequency();
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if (current_cpu_type() == CPU_XLR)
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preset_lpj = mips_hpt_frequency / (3 * HZ);
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else
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preset_lpj = mips_hpt_frequency / (2 * HZ);
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pr_info("MIPS counter frequency [%ld]\n",
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(unsigned long)mips_hpt_frequency);
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}
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