projects / deliverable / linux.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> | |
| 0f7b332f | 19 | #include <asm/hardware/gic.h> |
| 1c51ed4f | 20 | #include <asm/localtimer.h> |
| 72f4d579 MD |
21 | #include <asm/mach-types.h> |
| 22 | #include <mach/common.h> | |
| 1c51ed4f | 23 | |
| 28626632 MD |
24 | #define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2()) |
| 25 | ||
| 1c51ed4f MD |
26 | static unsigned int __init shmobile_smp_get_core_count(void) |
| 27 | { | |
| 28626632 | 28 | if (is_sh73a0()) |
| 72f4d579 MD |
29 | return sh73a0_get_core_count(); |
| 30 | ||
| 1c51ed4f MD |
31 | return 1; |
| 32 | } | |
| 33 | ||
| 34 | static void __init shmobile_smp_prepare_cpus(void) | |
| 35 | { | |
| 28626632 | 36 | if (is_sh73a0()) |
| 72f4d579 | 37 | sh73a0_smp_prepare_cpus(); |
| 1c51ed4f MD |
38 | } |
| 39 | ||
| 1c51ed4f MD |
40 | void __cpuinit platform_secondary_init(unsigned int cpu) |
| 41 | { | |
| 42 | trace_hardirqs_off(); | |
| 72f4d579 | 43 | |
| 28626632 | 44 | if (is_sh73a0()) |
| 72f4d579 | 45 | sh73a0_secondary_init(cpu); |
| 1c51ed4f MD |
46 | } |
| 47 | ||
| 48 | int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) | |
| 49 | { | |
| 28626632 | 50 | if (is_sh73a0()) |
| 72f4d579 MD |
51 | return sh73a0_boot_secondary(cpu); |
| 52 | ||
| 1c51ed4f MD |
53 | return -ENOSYS; |
| 54 | } | |
| 55 | ||
| 56 | void __init smp_init_cpus(void) | |
| 57 | { | |
| 58 | unsigned int ncores = shmobile_smp_get_core_count(); | |
| 59 | unsigned int i; | |
| 60 | ||
| a06f916b RK |
61 | if (ncores > nr_cpu_ids) { |
| 62 | pr_warn("SMP: %u cores greater than maximum (%u), clipping\n", | |
| 63 | ncores, nr_cpu_ids); | |
| 64 | ncores = nr_cpu_ids; | |
| 65 | } | |
| 66 | ||
| 1c51ed4f MD |
67 | for (i = 0; i < ncores; i++) |
| 68 | set_cpu_possible(i, true); | |
| 0f7b332f RK |
69 | |
| 70 | set_smp_cross_call(gic_raise_softirq); | |
| 1c51ed4f MD |
71 | } |
| 72 | ||
| c413521e | 73 | void __init platform_smp_prepare_cpus(unsigned int max_cpus) |
| 1c51ed4f | 74 | { |
| c413521e | 75 | shmobile_smp_prepare_cpus(); |
| 1c51ed4f | 76 | } |