1 /* 2 * SMP support for R-Mobile / SH-Mobile 3 * 4 * Copyright (C) 2010 Magnus Damm 5 * Copyright (C) 2011 Paul Mundt 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> 19 #include <asm/hardware/gic.h> 20 #include <asm/localtimer.h> 21 #include <asm/mach-types.h> 22 #include <mach/common.h> 23 24 static unsigned int __init shmobile_smp_get_core_count(void) 25 { 26 if (machine_is_ag5evm()) 27 return sh73a0_get_core_count(); 28 29 return 1; 30 } 31 32 static void __init shmobile_smp_prepare_cpus(void) 33 { 34 if (machine_is_ag5evm()) 35 sh73a0_smp_prepare_cpus(); 36 } 37 38 void __cpuinit platform_secondary_init(unsigned int cpu) 39 { 40 trace_hardirqs_off(); 41 42 if (machine_is_ag5evm()) 43 sh73a0_secondary_init(cpu); 44 } 45 46 int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) 47 { 48 if (machine_is_ag5evm()) 49 return sh73a0_boot_secondary(cpu); 50 51 return -ENOSYS; 52 } 53 54 void __init smp_init_cpus(void) 55 { 56 unsigned int ncores = shmobile_smp_get_core_count(); 57 unsigned int i; 58 59 for (i = 0; i < ncores; i++) 60 set_cpu_possible(i, true); 61 62 set_smp_cross_call(gic_raise_softirq); 63 } 64 65 void __init platform_smp_prepare_cpus(unsigned int max_cpus) 66 { 67 shmobile_smp_prepare_cpus(); 68 } 69