| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 | |
| 44 | #if defined(CONFIG_CPU_XLP) |
| 45 | #include <asm/netlogic/xlp-hal/iomap.h> |
| 46 | #include <asm/netlogic/xlp-hal/xlp.h> |
| 47 | #include <asm/netlogic/xlp-hal/sys.h> |
| 48 | #include <asm/netlogic/xlp-hal/pic.h> |
| 49 | #elif defined(CONFIG_CPU_XLR) |
| 50 | #include <asm/netlogic/xlr/iomap.h> |
| 51 | #include <asm/netlogic/xlr/pic.h> |
| 52 | #include <asm/netlogic/xlr/xlr.h> |
| 53 | #else |
| 54 | #error "Unknown CPU" |
| 55 | #endif |
| 56 | |
| 57 | unsigned int get_c0_compare_int(void) |
| 58 | { |
| 59 | return IRQ_TIMER; |
| 60 | } |
| 61 | |
| 62 | static cycle_t nlm_get_pic_timer(struct clocksource *cs) |
| 63 | { |
| 64 | uint64_t picbase = nlm_get_node(0)->picbase; |
| 65 | |
| 66 | return ~nlm_pic_read_timer(picbase, PIC_CLOCK_TIMER); |
| 67 | } |
| 68 | |
| 69 | static cycle_t nlm_get_pic_timer32(struct clocksource *cs) |
| 70 | { |
| 71 | uint64_t picbase = nlm_get_node(0)->picbase; |
| 72 | |
| 73 | return ~nlm_pic_read_timer32(picbase, PIC_CLOCK_TIMER); |
| 74 | } |
| 75 | |
| 76 | static struct clocksource csrc_pic = { |
| 77 | .name = "PIC", |
| 78 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, |
| 79 | }; |
| 80 | |
| 81 | static void nlm_init_pic_timer(void) |
| 82 | { |
| 83 | uint64_t picbase = nlm_get_node(0)->picbase; |
| 84 | u32 picfreq; |
| 85 | |
| 86 | nlm_pic_set_timer(picbase, PIC_CLOCK_TIMER, ~0ULL, 0, 0); |
| 87 | if (current_cpu_data.cputype == CPU_XLR) { |
| 88 | csrc_pic.mask = CLOCKSOURCE_MASK(32); |
| 89 | csrc_pic.read = nlm_get_pic_timer32; |
| 90 | } else { |
| 91 | csrc_pic.mask = CLOCKSOURCE_MASK(64); |
| 92 | csrc_pic.read = nlm_get_pic_timer; |
| 93 | } |
| 94 | csrc_pic.rating = 1000; |
| 95 | picfreq = pic_timer_freq(); |
| 96 | clocksource_register_hz(&csrc_pic, picfreq); |
| 97 | pr_info("PIC clock source added, frequency %d\n", picfreq); |
| 98 | } |
| 99 | |
| 100 | void __init plat_time_init(void) |
| 101 | { |
| 102 | nlm_init_pic_timer(); |
| 103 | mips_hpt_frequency = nlm_get_cpu_frequency(); |
| 104 | if (current_cpu_type() == CPU_XLR) |
| 105 | preset_lpj = mips_hpt_frequency / (3 * HZ); |
| 106 | else |
| 107 | preset_lpj = mips_hpt_frequency / (2 * HZ); |
| 108 | pr_info("MIPS counter frequency [%ld]\n", |
| 109 | (unsigned long)mips_hpt_frequency); |
| 110 | } |