projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f07cb6a0 SS |
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 | }; |