projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bd5a875d MD |
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. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU General Public License | |
| 17 | * along with this program; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | #include <linux/kernel.h> | |
| 21 | #include <linux/init.h> | |
| 22 | #include <linux/smp.h> | |
| 23 | #include <linux/spinlock.h> | |
| 24 | #include <linux/io.h> | |
| 25 | #include <linux/delay.h> | |
| bd5a875d MD |
26 | #include <asm/smp_plat.h> |
| 27 | #include <asm/smp_scu.h> | |
| fd44aa5e | 28 | #include "common.h" |
| bd5a875d MD |
29 | |
| 30 | #define EMEV2_SCU_BASE 0x1e000000 | |
| 8d7217e5 MD |
31 | #define EMEV2_SMU_BASE 0xe0110000 |
| 32 | #define SMU_GENERAL_REG0 0x7c0 | |
| bd5a875d | 33 | |
| 8bd26e3a | 34 | static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) |
| bd5a875d | 35 | { |
| 1af4b3fa | 36 | arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); |
| bd5a875d MD |
37 | return 0; |
| 38 | } | |
| 39 | ||
| a62580e5 | 40 | static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) |
| bd5a875d | 41 | { |
| 8d7217e5 MD |
42 | void __iomem *smu; |
| 43 | ||
| 0da60225 | 44 | /* Tell ROM loader about our vector (in headsmp.S) */ |
| 8d7217e5 MD |
45 | smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); |
| 46 | if (smu) { | |
| 47 | iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); | |
| 48 | iounmap(smu); | |
| 49 | } | |
| da252b8e | 50 | |
| 0da60225 MD |
51 | /* setup EMEV2 specific SCU bits */ |
| 52 | shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE); | |
| 53 | shmobile_smp_scu_prepare_cpus(max_cpus); | |
| bd5a875d | 54 | } |
| a62580e5 | 55 | |
| a62580e5 | 56 | struct smp_operations emev2_smp_ops __initdata = { |
| a62580e5 | 57 | .smp_prepare_cpus = emev2_smp_prepare_cpus, |
| a62580e5 | 58 | .smp_boot_secondary = emev2_boot_secondary, |
| a62580e5 | 59 | }; |