Magnus Damm | ad09cb8 | 2013-08-29 08:22:07 +0900 | [diff] [blame] | 1 | /* |
| 2 | * SMP support for r8a7790 |
| 3 | * |
| 4 | * Copyright (C) 2012-2013 Renesas Solutions Corp. |
| 5 | * Copyright (C) 2012 Takashi Yoshii <takashi.yoshii.ze@renesas.com> |
| 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. |
| 15 | */ |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/smp.h> |
| 19 | #include <linux/io.h> |
| 20 | #include <asm/smp_plat.h> |
| 21 | #include <mach/common.h> |
Gaku Inami | 0445ded | 2014-01-15 21:26:04 +0900 | [diff] [blame] | 22 | #include <mach/pm-rcar.h> |
| 23 | #include <mach/r8a7790.h> |
Magnus Damm | ad09cb8 | 2013-08-29 08:22:07 +0900 | [diff] [blame] | 24 | |
| 25 | #define RST 0xe6160000 |
| 26 | #define CA15BAR 0x0020 |
| 27 | #define CA7BAR 0x0030 |
| 28 | #define CA15RESCNT 0x0040 |
| 29 | #define CA7RESCNT 0x0044 |
| 30 | #define MERAM 0xe8080000 |
| 31 | |
Keita Kobayashi | c2c97ec | 2014-01-15 21:26:13 +0900 | [diff] [blame] | 32 | static struct rcar_sysc_ch r8a7790_ca15_scu = { |
| 33 | .chan_offs = 0x180, /* PWRSR5 .. PWRER5 */ |
| 34 | .isr_bit = 12, /* CA15-SCU */ |
| 35 | }; |
| 36 | |
Gaku Inami | 0445ded | 2014-01-15 21:26:04 +0900 | [diff] [blame] | 37 | static struct rcar_sysc_ch r8a7790_ca7_scu = { |
| 38 | .chan_offs = 0x100, /* PWRSR3 .. PWRER3 */ |
| 39 | .isr_bit = 21, /* CA7-SCU */ |
| 40 | }; |
| 41 | |
Magnus Damm | ad09cb8 | 2013-08-29 08:22:07 +0900 | [diff] [blame] | 42 | static void __init r8a7790_smp_prepare_cpus(unsigned int max_cpus) |
| 43 | { |
| 44 | void __iomem *p; |
| 45 | u32 bar; |
| 46 | |
| 47 | /* let APMU code install data related to shmobile_boot_vector */ |
| 48 | shmobile_smp_apmu_prepare_cpus(max_cpus); |
| 49 | |
| 50 | /* MERAM for jump stub, because BAR requires 256KB aligned address */ |
| 51 | p = ioremap_nocache(MERAM, shmobile_boot_size); |
| 52 | memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size); |
| 53 | iounmap(p); |
| 54 | |
| 55 | /* setup reset vectors */ |
| 56 | p = ioremap_nocache(RST, 0x63); |
| 57 | bar = (MERAM >> 8) & 0xfffffc00; |
| 58 | writel_relaxed(bar, p + CA15BAR); |
| 59 | writel_relaxed(bar, p + CA7BAR); |
| 60 | writel_relaxed(bar | 0x10, p + CA15BAR); |
| 61 | writel_relaxed(bar | 0x10, p + CA7BAR); |
| 62 | |
| 63 | /* enable clocks to all CPUs */ |
| 64 | writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000, |
| 65 | p + CA15RESCNT); |
| 66 | writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000, |
| 67 | p + CA7RESCNT); |
| 68 | iounmap(p); |
Gaku Inami | 0445ded | 2014-01-15 21:26:04 +0900 | [diff] [blame] | 69 | |
| 70 | /* turn on power to SCU */ |
| 71 | r8a7790_pm_init(); |
Keita Kobayashi | c2c97ec | 2014-01-15 21:26:13 +0900 | [diff] [blame] | 72 | rcar_sysc_power_up(&r8a7790_ca15_scu); |
Gaku Inami | 0445ded | 2014-01-15 21:26:04 +0900 | [diff] [blame] | 73 | rcar_sysc_power_up(&r8a7790_ca7_scu); |
Magnus Damm | ad09cb8 | 2013-08-29 08:22:07 +0900 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | struct smp_operations r8a7790_smp_ops __initdata = { |
| 77 | .smp_prepare_cpus = r8a7790_smp_prepare_cpus, |
| 78 | .smp_boot_secondary = shmobile_smp_apmu_boot_secondary, |
| 79 | #ifdef CONFIG_HOTPLUG_CPU |
| 80 | .cpu_disable = shmobile_smp_cpu_disable, |
| 81 | .cpu_die = shmobile_smp_apmu_cpu_die, |
| 82 | .cpu_kill = shmobile_smp_apmu_cpu_kill, |
| 83 | #endif |
| 84 | }; |