Commit | Line | Data |
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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 | { | |
98f60f86 | 30 | .iomem = DEFINE_RES_MEM(0xe6152000, 0x188), |
7466c52e | 31 | .cpus = { 0, 1 }, |
a8d2ff39 HN |
32 | } |
33 | }; | |
34 | ||
687c27b0 MD |
35 | static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus) |
36 | { | |
687c27b0 | 37 | /* let APMU code install data related to shmobile_boot_vector */ |
a8d2ff39 HN |
38 | shmobile_smp_apmu_prepare_cpus(max_cpus, |
39 | r8a7791_apmu_config, | |
40 | ARRAY_SIZE(r8a7791_apmu_config)); | |
687c27b0 | 41 | |
a8caad66 | 42 | rcar_gen2_pm_init(); |
687c27b0 MD |
43 | } |
44 | ||
277efd30 MD |
45 | static int r8a7791_smp_boot_secondary(unsigned int cpu, |
46 | struct task_struct *idle) | |
47 | { | |
48 | /* Error out when hardware debug mode is enabled */ | |
49 | if (rcar_gen2_read_mode_pins() & BIT(21)) { | |
50 | pr_warn("Unable to boot CPU%u when MD21 is set\n", cpu); | |
51 | return -ENOTSUPP; | |
52 | } | |
53 | ||
54 | return shmobile_smp_apmu_boot_secondary(cpu, idle); | |
55 | } | |
56 | ||
687c27b0 MD |
57 | struct smp_operations r8a7791_smp_ops __initdata = { |
58 | .smp_prepare_cpus = r8a7791_smp_prepare_cpus, | |
277efd30 | 59 | .smp_boot_secondary = r8a7791_smp_boot_secondary, |
687c27b0 | 60 | #ifdef CONFIG_HOTPLUG_CPU |
787047ee | 61 | .cpu_can_disable = shmobile_smp_cpu_can_disable, |
687c27b0 MD |
62 | .cpu_die = shmobile_smp_apmu_cpu_die, |
63 | .cpu_kill = shmobile_smp_apmu_cpu_kill, | |
64 | #endif | |
65 | }; |