blob: 01f792fcb220188aa73043abc7f7ffc1f52c6432 [file] [log] [blame]
Magnus Dammf40aaf62012-01-10 17:44:39 +09001/*
2 * SMP support for R-Mobile / SH-Mobile - r8a7779 portion
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Copyright (C) 2011 Magnus Damm
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
Magnus Dammf40aaf62012-01-10 17:44:39 +090015 */
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <linux/smp.h>
19#include <linux/spinlock.h>
20#include <linux/io.h>
21#include <linux/delay.h>
Geert Uytterhoeven1b553532014-06-20 18:53:05 +020022
Magnus Dammbbf26272013-02-18 22:47:25 +090023#include <asm/cacheflush.h>
Will Deaconeb504392012-01-20 12:01:12 +010024#include <asm/smp_plat.h>
Magnus Dammf40aaf62012-01-10 17:44:39 +090025#include <asm/smp_scu.h>
26#include <asm/smp_twd.h>
Geert Uytterhoeven1b553532014-06-20 18:53:05 +020027
Magnus Dammfd44aa52014-06-17 16:47:37 +090028#include "common.h"
Magnus Damm585c09d2014-06-17 16:47:53 +090029#include "pm-rcar.h"
Geert Uytterhoeven1b553532014-06-20 18:53:05 +020030#include "r8a7779.h"
Magnus Dammf40aaf62012-01-10 17:44:39 +090031
Rob Herringa2a47ca2012-03-09 17:16:40 -060032#define AVECR IOMEM(0xfe700040)
Magnus Dammabf88132013-02-18 22:47:16 +090033#define R8A7779_SCU_BASE 0xf0000000
Magnus Damm3b94afa2013-02-13 22:46:48 +090034
Magnus Damma6557eb2014-01-15 16:43:08 +090035static struct rcar_sysc_ch r8a7779_ch_cpu1 = {
Magnus Dammf40aaf62012-01-10 17:44:39 +090036 .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
37 .chan_bit = 1, /* ARM1 */
38 .isr_bit = 1, /* ARM1 */
39};
40
Magnus Damma6557eb2014-01-15 16:43:08 +090041static struct rcar_sysc_ch r8a7779_ch_cpu2 = {
Magnus Dammf40aaf62012-01-10 17:44:39 +090042 .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
43 .chan_bit = 2, /* ARM2 */
44 .isr_bit = 2, /* ARM2 */
45};
46
Magnus Damma6557eb2014-01-15 16:43:08 +090047static struct rcar_sysc_ch r8a7779_ch_cpu3 = {
Magnus Dammf40aaf62012-01-10 17:44:39 +090048 .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */
49 .chan_bit = 3, /* ARM3 */
50 .isr_bit = 3, /* ARM3 */
51};
52
Magnus Damma6557eb2014-01-15 16:43:08 +090053static struct rcar_sysc_ch *r8a7779_ch_cpu[4] = {
Magnus Dammf40aaf62012-01-10 17:44:39 +090054 [1] = &r8a7779_ch_cpu1,
55 [2] = &r8a7779_ch_cpu2,
56 [3] = &r8a7779_ch_cpu3,
57};
58
Magnus Damm1dc13ee2014-12-16 18:39:31 +090059#if defined(CONFIG_HAVE_ARM_TWD) && !defined(CONFIG_ARCH_MULTIPLATFORM)
Magnus Dammabf88132013-02-18 22:47:16 +090060static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, R8A7779_SCU_BASE + 0x600, 29);
Magnus Dammb759bd12012-05-10 14:57:22 +090061void __init r8a7779_register_twd(void)
62{
63 twd_local_timer_register(&twd_local_timer);
64}
65#endif
66
Marc Zyngiera62580e2011-09-08 13:15:22 +010067static int r8a7779_platform_cpu_kill(unsigned int cpu)
Magnus Dammf40aaf62012-01-10 17:44:39 +090068{
Magnus Damma6557eb2014-01-15 16:43:08 +090069 struct rcar_sysc_ch *ch = NULL;
Magnus Dammf40aaf62012-01-10 17:44:39 +090070 int ret = -EIO;
71
72 cpu = cpu_logical_map(cpu);
73
Magnus Dammf40aaf62012-01-10 17:44:39 +090074 if (cpu < ARRAY_SIZE(r8a7779_ch_cpu))
75 ch = r8a7779_ch_cpu[cpu];
76
77 if (ch)
Magnus Damma6557eb2014-01-15 16:43:08 +090078 ret = rcar_sysc_power_down(ch);
Magnus Dammf40aaf62012-01-10 17:44:39 +090079
80 return ret ? ret : 1;
81}
82
Paul Gortmaker8bd26e32013-06-17 15:43:14 -040083static int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
Magnus Dammf40aaf62012-01-10 17:44:39 +090084{
Magnus Damma6557eb2014-01-15 16:43:08 +090085 struct rcar_sysc_ch *ch = NULL;
Magnus Damm0ca28942013-07-31 16:07:31 +090086 unsigned int lcpu = cpu_logical_map(cpu);
87 int ret;
Magnus Dammf40aaf62012-01-10 17:44:39 +090088
Magnus Damm0ca28942013-07-31 16:07:31 +090089 if (lcpu < ARRAY_SIZE(r8a7779_ch_cpu))
90 ch = r8a7779_ch_cpu[lcpu];
Magnus Dammf40aaf62012-01-10 17:44:39 +090091
92 if (ch)
Magnus Damma6557eb2014-01-15 16:43:08 +090093 ret = rcar_sysc_power_up(ch);
Magnus Damm0ca28942013-07-31 16:07:31 +090094 else
95 ret = -EIO;
Magnus Dammf40aaf62012-01-10 17:44:39 +090096
97 return ret;
98}
99
Marc Zyngiera62580e2011-09-08 13:15:22 +0100100static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
Magnus Dammf40aaf62012-01-10 17:44:39 +0900101{
Magnus Dammaf642312013-06-10 18:19:56 +0900102 /* Map the reset vector (in headsmp-scu.S, headsmp.S) */
103 __raw_writel(__pa(shmobile_boot_vector), AVECR);
104 shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
105 shmobile_boot_arg = (unsigned long)shmobile_scu_base;
Magnus Dammf40aaf62012-01-10 17:44:39 +0900106
Magnus Damm0ca28942013-07-31 16:07:31 +0900107 /* setup r8a7779 specific SCU bits */
108 shmobile_scu_base = IOMEM(R8A7779_SCU_BASE);
109 shmobile_smp_scu_prepare_cpus(max_cpus);
Magnus Dammf40aaf62012-01-10 17:44:39 +0900110
111 r8a7779_pm_init();
112
113 /* power off secondary CPUs */
114 r8a7779_platform_cpu_kill(1);
115 r8a7779_platform_cpu_kill(2);
116 r8a7779_platform_cpu_kill(3);
117}
Marc Zyngiera62580e2011-09-08 13:15:22 +0100118
Magnus Dammfd0865c2013-02-18 22:47:54 +0900119#ifdef CONFIG_HOTPLUG_CPU
Magnus Dammfd0865c2013-02-18 22:47:54 +0900120static int r8a7779_cpu_kill(unsigned int cpu)
121{
Magnus Damme9e7c4f2013-07-31 16:08:09 +0900122 if (shmobile_smp_scu_cpu_kill(cpu))
123 return r8a7779_platform_cpu_kill(cpu);
Magnus Dammfd0865c2013-02-18 22:47:54 +0900124
125 return 0;
126}
Magnus Dammfd0865c2013-02-18 22:47:54 +0900127#endif /* CONFIG_HOTPLUG_CPU */
128
Marc Zyngiera62580e2011-09-08 13:15:22 +0100129struct smp_operations r8a7779_smp_ops __initdata = {
Marc Zyngiera62580e2011-09-08 13:15:22 +0100130 .smp_prepare_cpus = r8a7779_smp_prepare_cpus,
Marc Zyngiera62580e2011-09-08 13:15:22 +0100131 .smp_boot_secondary = r8a7779_boot_secondary,
132#ifdef CONFIG_HOTPLUG_CPU
Magnus Damme9e7c4f2013-07-31 16:08:09 +0900133 .cpu_die = shmobile_smp_scu_cpu_die,
134 .cpu_kill = r8a7779_cpu_kill,
Marc Zyngiera62580e2011-09-08 13:15:22 +0100135#endif
136};