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