Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 1 | /* |
| 2 | * SMP support for Emma Mobile EV2 |
| 3 | * |
| 4 | * Copyright (C) 2012 Renesas Solutions Corp. |
| 5 | * Copyright (C) 2012 Magnus Damm |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 15 | */ |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/smp.h> |
| 19 | #include <linux/spinlock.h> |
| 20 | #include <linux/io.h> |
| 21 | #include <linux/delay.h> |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 22 | #include <asm/smp_plat.h> |
| 23 | #include <asm/smp_scu.h> |
Magnus Damm | fd44aa5 | 2014-06-17 16:47:37 +0900 | [diff] [blame] | 24 | #include "common.h" |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 25 | |
| 26 | #define EMEV2_SCU_BASE 0x1e000000 |
Magnus Damm | 8d7217e | 2013-07-02 18:28:30 +0900 | [diff] [blame] | 27 | #define EMEV2_SMU_BASE 0xe0110000 |
| 28 | #define SMU_GENERAL_REG0 0x7c0 |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 29 | |
Paul Gortmaker | 8bd26e3 | 2013-06-17 15:43:14 -0400 | [diff] [blame] | 30 | static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 31 | { |
Magnus Damm | 1af4b3f | 2013-02-13 22:47:27 +0900 | [diff] [blame] | 32 | arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 33 | return 0; |
| 34 | } |
| 35 | |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 36 | static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 37 | { |
Magnus Damm | 8d7217e | 2013-07-02 18:28:30 +0900 | [diff] [blame] | 38 | void __iomem *smu; |
| 39 | |
Magnus Damm | 0da6022 | 2013-07-31 16:07:40 +0900 | [diff] [blame] | 40 | /* Tell ROM loader about our vector (in headsmp.S) */ |
Magnus Damm | 8d7217e | 2013-07-02 18:28:30 +0900 | [diff] [blame] | 41 | smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); |
| 42 | if (smu) { |
| 43 | iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); |
| 44 | iounmap(smu); |
| 45 | } |
Magnus Damm | da252b8 | 2013-02-13 00:45:06 +0900 | [diff] [blame] | 46 | |
Magnus Damm | 0da6022 | 2013-07-31 16:07:40 +0900 | [diff] [blame] | 47 | /* setup EMEV2 specific SCU bits */ |
| 48 | shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE); |
| 49 | shmobile_smp_scu_prepare_cpus(max_cpus); |
Magnus Damm | bd5a875 | 2012-05-16 15:45:25 +0900 | [diff] [blame] | 50 | } |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 51 | |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 52 | struct smp_operations emev2_smp_ops __initdata = { |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 53 | .smp_prepare_cpus = emev2_smp_prepare_cpus, |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 54 | .smp_boot_secondary = emev2_boot_secondary, |
Marc Zyngier | a62580e | 2011-09-08 13:15:22 +0100 | [diff] [blame] | 55 | }; |