projects / deliverable / linux.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. | |
| bd5a875d MD |
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> | |
| bd5a875d MD |
22 | #include <asm/smp_plat.h> |
| 23 | #include <asm/smp_scu.h> | |
| c58b31aa | 24 | |
| fd44aa5e | 25 | #include "common.h" |
| c58b31aa | 26 | #include "emev2.h" |
| bd5a875d MD |
27 | |
| 28 | #define EMEV2_SCU_BASE 0x1e000000 | |
| 8d7217e5 MD |
29 | #define EMEV2_SMU_BASE 0xe0110000 |
| 30 | #define SMU_GENERAL_REG0 0x7c0 | |
| bd5a875d | 31 | |
| 8bd26e3a | 32 | static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) |
| bd5a875d | 33 | { |
| 1af4b3fa | 34 | arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); |
| bd5a875d MD |
35 | return 0; |
| 36 | } | |
| 37 | ||
| a62580e5 | 38 | static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) |
| bd5a875d | 39 | { |
| 8d7217e5 MD |
40 | void __iomem *smu; |
| 41 | ||
| 0da60225 | 42 | /* Tell ROM loader about our vector (in headsmp.S) */ |
| 8d7217e5 MD |
43 | smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); |
| 44 | if (smu) { | |
| 45 | iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); | |
| 46 | iounmap(smu); | |
| 47 | } | |
| da252b8e | 48 | |
| 0da60225 | 49 | /* setup EMEV2 specific SCU bits */ |
| 8701d808 | 50 | shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); |
| bd5a875d | 51 | } |
| a62580e5 | 52 | |
| 75305275 | 53 | const struct smp_operations emev2_smp_ops __initconst = { |
| a62580e5 | 54 | .smp_prepare_cpus = emev2_smp_prepare_cpus, |
| a62580e5 | 55 | .smp_boot_secondary = emev2_boot_secondary, |
| a62580e5 | 56 | }; |