From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/arm/mach-shmobile/smp-sh73a0.c | 75 +++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 arch/arm/mach-shmobile/smp-sh73a0.c (limited to 'arch/arm/mach-shmobile/smp-sh73a0.c') diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c new file mode 100644 index 000000000..2106d6b76 --- /dev/null +++ b/arch/arm/mach-shmobile/smp-sh73a0.c @@ -0,0 +1,75 @@ +/* + * 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 +#include +#include +#include +#include + +#include +#include + +#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 + +#if defined(CONFIG_HAVE_ARM_TWD) && !defined(CONFIG_ARCH_MULTIPLATFORM) +static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, SH73A0_SCU_BASE + 0x600, 29); +void __init sh73a0_register_twd(void) +{ + twd_local_timer_register(&twd_local_timer); +} +#endif + +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_scu_base = IOMEM(SH73A0_SCU_BASE); + shmobile_smp_scu_prepare_cpus(max_cpus); +} + +struct smp_operations sh73a0_smp_ops __initdata = { + .smp_prepare_cpus = sh73a0_smp_prepare_cpus, + .smp_boot_secondary = sh73a0_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_disable = shmobile_smp_cpu_disable, + .cpu_die = shmobile_smp_scu_cpu_die, + .cpu_kill = shmobile_smp_scu_cpu_kill, +#endif +}; -- cgit v1.2.3-54-g00ecf