1f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm/* 2f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * SMP support for R-Mobile / SH-Mobile - r8a7779 portion 3f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * 4f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * Copyright (C) 2011 Renesas Solutions Corp. 5f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * Copyright (C) 2011 Magnus Damm 6f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * 7f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * This program is free software; you can redistribute it and/or modify 8f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * it under the terms of the GNU General Public License as published by 9f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * the Free Software Foundation; version 2 of the License. 10f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * 11f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * This program is distributed in the hope that it will be useful, 12f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * but WITHOUT ANY WARRANTY; without even the implied warranty of 13f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * GNU General Public License for more details. 15f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * 16f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * You should have received a copy of the GNU General Public License 17f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * along with this program; if not, write to the Free Software 18f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm */ 20f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/kernel.h> 21f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/init.h> 22f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/smp.h> 23f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/spinlock.h> 24f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/io.h> 25f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <linux/delay.h> 261b55353c9214788b0d0797a5fd4585af1557a12cGeert Uytterhoeven 27bbf2627c77355ee07cb589904efaf814cfc223d1Magnus Damm#include <asm/cacheflush.h> 28eb50439b92b6298bf209a982f295ba9c0f7cb30bWill Deacon#include <asm/smp_plat.h> 29f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <asm/smp_scu.h> 30f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm#include <asm/smp_twd.h> 311b55353c9214788b0d0797a5fd4585af1557a12cGeert Uytterhoeven 32fd44aa5e570d1d8c7d361dcbf94c2b8cd25cfe92Magnus Damm#include "common.h" 33585c09df3738d4f72cee36eb0b975351fd9a339aMagnus Damm#include "pm-rcar.h" 341b55353c9214788b0d0797a5fd4585af1557a12cGeert Uytterhoeven#include "r8a7779.h" 35f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 36a2a47ca36642e3995e982957bc42678cf11ca6acRob Herring#define AVECR IOMEM(0xfe700040) 37abf88136f73da52162d7e70bd1d8d4294c08bf1eMagnus Damm#define R8A7779_SCU_BASE 0xf0000000 383b94afa38350ad5b592df5b6539a20a253e04b53Magnus Damm 39a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Dammstatic struct rcar_sysc_ch r8a7779_ch_cpu1 = { 40f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */ 41f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_bit = 1, /* ARM1 */ 42f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .isr_bit = 1, /* ARM1 */ 43f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm}; 44f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 45a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Dammstatic struct rcar_sysc_ch r8a7779_ch_cpu2 = { 46f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */ 47f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_bit = 2, /* ARM2 */ 48f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .isr_bit = 2, /* ARM2 */ 49f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm}; 50f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 51a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Dammstatic struct rcar_sysc_ch r8a7779_ch_cpu3 = { 52f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_offs = 0x40, /* PWRSR0 .. PWRER0 */ 53f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .chan_bit = 3, /* ARM3 */ 54f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm .isr_bit = 3, /* ARM3 */ 55f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm}; 56f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 57a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Dammstatic struct rcar_sysc_ch *r8a7779_ch_cpu[4] = { 58f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm [1] = &r8a7779_ch_cpu1, 59f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm [2] = &r8a7779_ch_cpu2, 60f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm [3] = &r8a7779_ch_cpu3, 61f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm}; 62f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 63b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm#ifdef CONFIG_HAVE_ARM_TWD 64abf88136f73da52162d7e70bd1d8d4294c08bf1eMagnus Dammstatic DEFINE_TWD_LOCAL_TIMER(twd_local_timer, R8A7779_SCU_BASE + 0x600, 29); 65b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Dammvoid __init r8a7779_register_twd(void) 66b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm{ 67b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm twd_local_timer_register(&twd_local_timer); 68b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm} 69b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm#endif 70b759bd114e27fbb940fb44fd16552e8f4acd831eMagnus Damm 71a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngierstatic int r8a7779_platform_cpu_kill(unsigned int cpu) 72f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm{ 73a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Damm struct rcar_sysc_ch *ch = NULL; 74f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm int ret = -EIO; 75f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 76f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm cpu = cpu_logical_map(cpu); 77f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 78f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm if (cpu < ARRAY_SIZE(r8a7779_ch_cpu)) 79f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm ch = r8a7779_ch_cpu[cpu]; 80f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 81f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm if (ch) 82a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Damm ret = rcar_sysc_power_down(ch); 83f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 84f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm return ret ? ret : 1; 85f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm} 86f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 878bd26e3a7e49af2697449bbcb7187a39dc85d672Paul Gortmakerstatic int r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle) 88f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm{ 89a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Damm struct rcar_sysc_ch *ch = NULL; 900ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm unsigned int lcpu = cpu_logical_map(cpu); 910ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm int ret; 92f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 930ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm if (lcpu < ARRAY_SIZE(r8a7779_ch_cpu)) 940ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm ch = r8a7779_ch_cpu[lcpu]; 95f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 96f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm if (ch) 97a6557eb795edcf7832b5278a11842c4ca302f4afMagnus Damm ret = rcar_sysc_power_up(ch); 980ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm else 990ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm ret = -EIO; 100f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 101f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm return ret; 102f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm} 103f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 104a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngierstatic void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus) 105f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm{ 106af642310aaa491df6dabcca96bdf0d1b8465a834Magnus Damm /* Map the reset vector (in headsmp-scu.S, headsmp.S) */ 107af642310aaa491df6dabcca96bdf0d1b8465a834Magnus Damm __raw_writel(__pa(shmobile_boot_vector), AVECR); 108af642310aaa491df6dabcca96bdf0d1b8465a834Magnus Damm shmobile_boot_fn = virt_to_phys(shmobile_boot_scu); 109af642310aaa491df6dabcca96bdf0d1b8465a834Magnus Damm shmobile_boot_arg = (unsigned long)shmobile_scu_base; 110f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 1110ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm /* setup r8a7779 specific SCU bits */ 1120ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm shmobile_scu_base = IOMEM(R8A7779_SCU_BASE); 1130ca2894b5a9007091ad1a4d82b9f3132d4dd9410Magnus Damm shmobile_smp_scu_prepare_cpus(max_cpus); 114f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 115f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm r8a7779_pm_init(); 116f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm 117f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm /* power off secondary CPUs */ 118f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm r8a7779_platform_cpu_kill(1); 119f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm r8a7779_platform_cpu_kill(2); 120f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm r8a7779_platform_cpu_kill(3); 121f40aaf6da14a4043d6361e0c7d74ada18e866059Magnus Damm} 122a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier 123fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm#ifdef CONFIG_HOTPLUG_CPU 124fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Dammstatic int r8a7779_cpu_kill(unsigned int cpu) 125fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm{ 126e9e7c4fbf468e205387b21463dddacfe44da2d9aMagnus Damm if (shmobile_smp_scu_cpu_kill(cpu)) 127e9e7c4fbf468e205387b21463dddacfe44da2d9aMagnus Damm return r8a7779_platform_cpu_kill(cpu); 128fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm 129fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm return 0; 130fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm} 131fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm 132fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Dammstatic int r8a7779_cpu_disable(unsigned int cpu) 133fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm{ 134fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm /* only CPU1->3 have power domains, do not allow hotplug of CPU0 */ 135fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm return cpu == 0 ? -EPERM : 0; 136fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm} 137fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm#endif /* CONFIG_HOTPLUG_CPU */ 138fd0865c3f7054d9068007fd280681cb4ea7929a1Magnus Damm 139a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngierstruct smp_operations r8a7779_smp_ops __initdata = { 140a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier .smp_prepare_cpus = r8a7779_smp_prepare_cpus, 141a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier .smp_boot_secondary = r8a7779_boot_secondary, 142a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier#ifdef CONFIG_HOTPLUG_CPU 143bbf2627c77355ee07cb589904efaf814cfc223d1Magnus Damm .cpu_disable = r8a7779_cpu_disable, 144e9e7c4fbf468e205387b21463dddacfe44da2d9aMagnus Damm .cpu_die = shmobile_smp_scu_cpu_die, 145e9e7c4fbf468e205387b21463dddacfe44da2d9aMagnus Damm .cpu_kill = r8a7779_cpu_kill, 146a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier#endif 147a62580e58065dc00430b16ced6e7a00837b8323fMarc Zyngier}; 148