projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c51ed4f MD |
1 | /* |
| 2 | * SMP support for R-Mobile / SH-Mobile | |
| 3 | * | |
| 4 | * Copyright (C) 2010 Magnus Damm | |
| c413521e | 5 | * Copyright (C) 2011 Paul Mundt |
| 1c51ed4f MD |
6 | * |
| 7 | * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | */ | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/errno.h> | |
| 15 | #include <linux/delay.h> | |
| 16 | #include <linux/device.h> | |
| 17 | #include <linux/smp.h> | |
| 18 | #include <linux/io.h> | |
| 450cca47 | 19 | #include <linux/of.h> |
| 0f7b332f | 20 | #include <asm/hardware/gic.h> |
| 72f4d579 MD |
21 | #include <asm/mach-types.h> |
| 22 | #include <mach/common.h> | |
| bd5a875d | 23 | #include <mach/emev2.h> |
| 1c51ed4f | 24 | |
| 873e9f7a | 25 | #ifdef CONFIG_ARCH_SH73A0 |
| 9601e873 AB |
26 | #define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2() || \ |
| 27 | of_machine_is_compatible("renesas,sh73a0")) | |
| 873e9f7a MD |
28 | #else |
| 29 | #define is_sh73a0() (0) | |
| 30 | #endif | |
| 31 | ||
| f40aaf6d | 32 | #define is_r8a7779() machine_is_marzen() |
| 6ae42bb2 NI |
33 | |
| 34 | #ifdef CONFIG_ARCH_EMEV2 | |
| 450cca47 | 35 | #define is_emev2() of_machine_is_compatible("renesas,emev2") |
| 6ae42bb2 NI |
36 | #else |
| 37 | #define is_emev2() (0) | |
| 38 | #endif | |
| 28626632 | 39 | |
| 1c51ed4f MD |
40 | static unsigned int __init shmobile_smp_get_core_count(void) |
| 41 | { | |
| 28626632 | 42 | if (is_sh73a0()) |
| 72f4d579 MD |
43 | return sh73a0_get_core_count(); |
| 44 | ||
| f40aaf6d MD |
45 | if (is_r8a7779()) |
| 46 | return r8a7779_get_core_count(); | |
| 47 | ||
| bd5a875d MD |
48 | if (is_emev2()) |
| 49 | return emev2_get_core_count(); | |
| 50 | ||
| 1c51ed4f MD |
51 | return 1; |
| 52 | } | |
| 53 | ||
| 54 | static void __init shmobile_smp_prepare_cpus(void) | |
| 55 | { | |
| 28626632 | 56 | if (is_sh73a0()) |
| 72f4d579 | 57 | sh73a0_smp_prepare_cpus(); |
| f40aaf6d MD |
58 | |
| 59 | if (is_r8a7779()) | |
| 60 | r8a7779_smp_prepare_cpus(); | |
| bd5a875d MD |
61 | |
| 62 | if (is_emev2()) | |
| 63 | emev2_smp_prepare_cpus(); | |
| 1c51ed4f MD |
64 | } |
| 65 | ||
| 8b306796 MD |
66 | int shmobile_platform_cpu_kill(unsigned int cpu) |
| 67 | { | |
| f40aaf6d MD |
68 | if (is_r8a7779()) |
| 69 | return r8a7779_platform_cpu_kill(cpu); | |
| 70 | ||
| bd5a875d MD |
71 | if (is_emev2()) |
| 72 | return emev2_platform_cpu_kill(cpu); | |
| 73 | ||
| 8b306796 MD |
74 | return 1; |
| 75 | } | |
| 76 | ||
| 1c51ed4f MD |
77 | void __cpuinit platform_secondary_init(unsigned int cpu) |
| 78 | { | |
| 79 | trace_hardirqs_off(); | |
| 72f4d579 | 80 | |
| 28626632 | 81 | if (is_sh73a0()) |
| 72f4d579 | 82 | sh73a0_secondary_init(cpu); |
| f40aaf6d MD |
83 | |
| 84 | if (is_r8a7779()) | |
| 85 | r8a7779_secondary_init(cpu); | |
| bd5a875d MD |
86 | |
| 87 | if (is_emev2()) | |
| 88 | emev2_secondary_init(cpu); | |
| 1c51ed4f MD |
89 | } |
| 90 | ||
| 91 | int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) | |
| 92 | { | |
| 28626632 | 93 | if (is_sh73a0()) |
| 72f4d579 MD |
94 | return sh73a0_boot_secondary(cpu); |
| 95 | ||
| f40aaf6d MD |
96 | if (is_r8a7779()) |
| 97 | return r8a7779_boot_secondary(cpu); | |
| 98 | ||
| bd5a875d MD |
99 | if (is_emev2()) |
| 100 | return emev2_boot_secondary(cpu); | |
| 101 | ||
| 1c51ed4f MD |
102 | return -ENOSYS; |
| 103 | } | |
| 104 | ||
| 105 | void __init smp_init_cpus(void) | |
| 106 | { | |
| 107 | unsigned int ncores = shmobile_smp_get_core_count(); | |
| 108 | unsigned int i; | |
| 109 | ||
| a06f916b RK |
110 | if (ncores > nr_cpu_ids) { |
| 111 | pr_warn("SMP: %u cores greater than maximum (%u), clipping\n", | |
| 112 | ncores, nr_cpu_ids); | |
| 113 | ncores = nr_cpu_ids; | |
| 114 | } | |
| 115 | ||
| 1c51ed4f MD |
116 | for (i = 0; i < ncores; i++) |
| 117 | set_cpu_possible(i, true); | |
| 0f7b332f RK |
118 | |
| 119 | set_smp_cross_call(gic_raise_softirq); | |
| 1c51ed4f MD |
120 | } |
| 121 | ||
| c413521e | 122 | void __init platform_smp_prepare_cpus(unsigned int max_cpus) |
| 1c51ed4f | 123 | { |
| c413521e | 124 | shmobile_smp_prepare_cpus(); |
| 1c51ed4f | 125 | } |