projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 687c27b0 MD |
1 | /* |
| 2 | * SMP support for r8a7791 | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Renesas Solutions Corp. | |
| 5 | * Copyright (C) 2013 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. | |
| 15 | */ | |
| 16 | #include <linux/kernel.h> | |
| 17 | #include <linux/init.h> | |
| 18 | #include <linux/smp.h> | |
| 19 | #include <linux/io.h> | |
| 5201b5a7 | 20 | |
| 687c27b0 | 21 | #include <asm/smp_plat.h> |
| 5201b5a7 | 22 | |
| fd44aa5e | 23 | #include "common.h" |
| a8d2ff39 | 24 | #include "platsmp-apmu.h" |
| 5201b5a7 | 25 | #include "r8a7791.h" |
| 62872989 | 26 | #include "rcar-gen2.h" |
| 687c27b0 | 27 | |
| a8d2ff39 HN |
28 | static struct rcar_apmu_config r8a7791_apmu_config[] = { |
| 29 | { | |
| 30 | .iomem = DEFINE_RES_MEM(0xe6152000, 0x88), | |
| 31 | .cpus = { 0, 1, 2, 3 }, | |
| 32 | }, | |
| 33 | { | |
| 34 | .iomem = DEFINE_RES_MEM(0xe6151000, 0x88), | |
| 35 | .cpus = { 0x100, 0x0101, 0x102, 0x103 }, | |
| 36 | } | |
| 37 | }; | |
| 38 | ||
| 687c27b0 MD |
39 | static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus) |
| 40 | { | |
| 687c27b0 | 41 | /* let APMU code install data related to shmobile_boot_vector */ |
| a8d2ff39 HN |
42 | shmobile_smp_apmu_prepare_cpus(max_cpus, |
| 43 | r8a7791_apmu_config, | |
| 44 | ARRAY_SIZE(r8a7791_apmu_config)); | |
| 687c27b0 | 45 | |
| 5f6108bb | 46 | r8a7791_pm_init(); |
| 687c27b0 MD |
47 | } |
| 48 | ||
| 277efd30 MD |
49 | static int r8a7791_smp_boot_secondary(unsigned int cpu, |
| 50 | struct task_struct *idle) | |
| 51 | { | |
| 52 | /* Error out when hardware debug mode is enabled */ | |
| 53 | if (rcar_gen2_read_mode_pins() & BIT(21)) { | |
| 54 | pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu); | |
| 55 | return -ENOTSUPP; | |
| 56 | } | |
| 57 | ||
| 58 | return shmobile_smp_apmu_boot_secondary(cpu, idle); | |
| 59 | } | |
| 60 | ||
| 687c27b0 MD |
61 | struct smp_operations r8a7791_smp_ops __initdata = { |
| 62 | .smp_prepare_cpus = r8a7791_smp_prepare_cpus, | |
| 277efd30 | 63 | .smp_boot_secondary = r8a7791_smp_boot_secondary, |
| 687c27b0 MD |
64 | #ifdef CONFIG_HOTPLUG_CPU |
| 65 | .cpu_disable = shmobile_smp_cpu_disable, | |
| 66 | .cpu_die = shmobile_smp_apmu_cpu_die, | |
| 67 | .cpu_kill = shmobile_smp_apmu_cpu_kill, | |
| 68 | #endif | |
| 69 | }; |