diff options
Diffstat (limited to 'arch/arm/mach-shmobile/smp-emev2.c')
| -rw-r--r-- | arch/arm/mach-shmobile/smp-emev2.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c new file mode 100644 index 0000000000..3853ecea44 --- /dev/null +++ b/arch/arm/mach-shmobile/smp-emev2.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SMP support for Emma Mobile EV2 + * + * Copyright (C) 2012 Renesas Solutions Corp. + * Copyright (C) 2012 Magnus Damm + */ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/spinlock.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <asm/smp_plat.h> +#include <asm/smp_scu.h> + +#include "common.h" +#include "emev2.h" + +#define EMEV2_SCU_BASE 0x1e000000 +#define EMEV2_SMU_BASE 0xe0110000 +#define SMU_GENERAL_REG0 0x7c0 + +static int emev2_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + arch_send_wakeup_ipi_mask(cpumask_of(cpu_logical_map(cpu))); + return 0; +} + +static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) +{ + void __iomem *smu; + + /* Tell ROM loader about our vector (in headsmp.S) */ + smu = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); + if (smu) { + iowrite32(__pa(shmobile_boot_vector), smu + SMU_GENERAL_REG0); + iounmap(smu); + } + + /* setup EMEV2 specific SCU bits */ + shmobile_smp_scu_prepare_cpus(EMEV2_SCU_BASE, max_cpus); +} + +const struct smp_operations emev2_smp_ops __initconst = { + .smp_prepare_cpus = emev2_smp_prepare_cpus, + .smp_boot_secondary = emev2_boot_secondary, +}; |