| /* |
| * SMP support for R-Mobile / SH-Mobile - sh73a0 portion |
| * |
| * Copyright (C) 2010 Magnus Damm |
| * Copyright (C) 2010 Takashi Yoshii |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/smp.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| |
| #include <asm/smp_plat.h> |
| #include <asm/smp_twd.h> |
| |
| #include "common.h" |
| #include "sh73a0.h" |
| |
| #define WUPCR IOMEM(0xe6151010) |
| #define SRESCR IOMEM(0xe6151018) |
| #define PSTR IOMEM(0xe6151040) |
| #define SBAR IOMEM(0xe6180020) |
| #define APARMBAREA IOMEM(0xe6f10020) |
| |
| #define SH73A0_SCU_BASE 0xf0000000 |
| |
| static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle) |
| { |
| unsigned int lcpu = cpu_logical_map(cpu); |
| |
| if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3) |
| __raw_writel(1 << lcpu, WUPCR); /* wake up */ |
| else |
| __raw_writel(1 << lcpu, SRESCR); /* reset */ |
| |
| return 0; |
| } |
| |
| static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus) |
| { |
| /* Map the reset vector (in headsmp.S) */ |
| __raw_writel(0, APARMBAREA); /* 4k */ |
| __raw_writel(__pa(shmobile_boot_vector), SBAR); |
| |
| /* setup sh73a0 specific SCU bits */ |
| shmobile_smp_scu_prepare_cpus(SH73A0_SCU_BASE, max_cpus); |
| } |
| |
| const struct smp_operations sh73a0_smp_ops __initconst = { |
| .smp_prepare_cpus = sh73a0_smp_prepare_cpus, |
| .smp_boot_secondary = sh73a0_boot_secondary, |
| #ifdef CONFIG_HOTPLUG_CPU |
| .cpu_can_disable = shmobile_smp_cpu_can_disable, |
| .cpu_die = shmobile_smp_scu_cpu_die, |
| .cpu_kill = shmobile_smp_scu_cpu_kill, |
| #endif |
| }; |