1/*
2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
3 * reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses.  You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the NetLogic
9 * license below:
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in
19 *    the documentation and/or other materials provided with the
20 *    distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <linux/init.h>
36
37#include <asm/time.h>
38#include <asm/cpu-features.h>
39
40#include <asm/netlogic/interrupt.h>
41#include <asm/netlogic/common.h>
42#include <asm/netlogic/haldefs.h>
43#include <asm/netlogic/common.h>
44
45#if defined(CONFIG_CPU_XLP)
46#include <asm/netlogic/xlp-hal/iomap.h>
47#include <asm/netlogic/xlp-hal/xlp.h>
48#include <asm/netlogic/xlp-hal/sys.h>
49#include <asm/netlogic/xlp-hal/pic.h>
50#elif defined(CONFIG_CPU_XLR)
51#include <asm/netlogic/xlr/iomap.h>
52#include <asm/netlogic/xlr/pic.h>
53#include <asm/netlogic/xlr/xlr.h>
54#else
55#error "Unknown CPU"
56#endif
57
58unsigned int get_c0_compare_int(void)
59{
60	return IRQ_TIMER;
61}
62
63static cycle_t nlm_get_pic_timer(struct clocksource *cs)
64{
65	uint64_t picbase = nlm_get_node(0)->picbase;
66
67	return ~nlm_pic_read_timer(picbase, PIC_CLOCK_TIMER);
68}
69
70static cycle_t nlm_get_pic_timer32(struct clocksource *cs)
71{
72	uint64_t picbase = nlm_get_node(0)->picbase;
73
74	return ~nlm_pic_read_timer32(picbase, PIC_CLOCK_TIMER);
75}
76
77static struct clocksource csrc_pic = {
78	.name		= "PIC",
79	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
80};
81
82static void nlm_init_pic_timer(void)
83{
84	uint64_t picbase = nlm_get_node(0)->picbase;
85	u32 picfreq;
86
87	nlm_pic_set_timer(picbase, PIC_CLOCK_TIMER, ~0ULL, 0, 0);
88	if (current_cpu_data.cputype == CPU_XLR) {
89		csrc_pic.mask	= CLOCKSOURCE_MASK(32);
90		csrc_pic.read	= nlm_get_pic_timer32;
91	} else {
92		csrc_pic.mask	= CLOCKSOURCE_MASK(64);
93		csrc_pic.read	= nlm_get_pic_timer;
94	}
95	csrc_pic.rating = 1000;
96	picfreq = pic_timer_freq();
97	clocksource_register_hz(&csrc_pic, picfreq);
98	pr_info("PIC clock source added, frequency %d\n", picfreq);
99}
100
101void __init plat_time_init(void)
102{
103	nlm_init_pic_timer();
104	mips_hpt_frequency = nlm_get_cpu_frequency();
105	if (current_cpu_type() == CPU_XLR)
106		preset_lpj = mips_hpt_frequency / (3 * HZ);
107	else
108		preset_lpj = mips_hpt_frequency / (2 * HZ);
109	pr_info("MIPS counter frequency [%ld]\n",
110			(unsigned long)mips_hpt_frequency);
111}
112