| Santosh Shilimkar | f07cb6a | 2013-06-10 12:20:17 -0400 | [diff] [blame^] | 1 | /* |
| 2 | * Keystone SOC SMP platform code |
| 3 | * |
| 4 | * Copyright 2013 Texas Instruments, Inc. |
| 5 | * Cyril Chemparathy <cyril@ti.com> |
| 6 | * Santosh Shilimkar <santosh.shillimkar@ti.com> |
| 7 | * |
| 8 | * Based on platsmp.c, Copyright (C) 2002 ARM Ltd. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms and conditions of the GNU General Public License, |
| 12 | * version 2, as published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/smp.h> |
| 17 | #include <linux/io.h> |
| 18 | |
| 19 | #include <asm/smp_plat.h> |
| 20 | #include <asm/prom.h> |
| 21 | |
| 22 | #include "keystone.h" |
| 23 | |
| 24 | static int __cpuinit keystone_smp_boot_secondary(unsigned int cpu, |
| 25 | struct task_struct *idle) |
| 26 | { |
| 27 | unsigned long start = virt_to_phys(&secondary_startup); |
| 28 | int error; |
| 29 | |
| 30 | pr_debug("keystone-smp: booting cpu %d, vector %08lx\n", |
| 31 | cpu, start); |
| 32 | |
| 33 | asm volatile ( |
| 34 | "mov r0, #0\n" /* power on cmd */ |
| 35 | "mov r1, %1\n" /* cpu */ |
| 36 | "mov r2, %2\n" /* start */ |
| 37 | ".inst 0xe1600070\n" /* smc #0 */ |
| 38 | "mov %0, r0\n" |
| 39 | : "=r" (error) |
| 40 | : "r"(cpu), "r"(start) |
| 41 | : "cc", "r0", "r1", "r2", "memory" |
| 42 | ); |
| 43 | |
| 44 | pr_debug("keystone-smp: monitor returned %d\n", error); |
| 45 | |
| 46 | return error; |
| 47 | } |
| 48 | |
| 49 | struct smp_operations keystone_smp_ops __initdata = { |
| 50 | .smp_init_cpus = arm_dt_init_cpu_maps, |
| 51 | .smp_boot_secondary = keystone_smp_boot_secondary, |
| 52 | }; |