diff options
| -rw-r--r-- | arch/arm/mach-shmobile/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/r8a7791.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/setup-r8a7791.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/smp-r8a7791.c | 62 |
4 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index 95e48d129ddc..f2d40edadcc9 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -40,6 +40,7 @@ smp-y := platsmp.o headsmp.o smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o headsmp-scu.o platsmp-scu.o smp-$(CONFIG_ARCH_R8A7779) += smp-r8a7779.o headsmp-scu.o platsmp-scu.o smp-$(CONFIG_ARCH_R8A7790) += smp-r8a7790.o platsmp-apmu.o +smp-$(CONFIG_ARCH_R8A7791) += smp-r8a7791.o platsmp-apmu.o smp-$(CONFIG_ARCH_EMEV2) += smp-emev2.o headsmp-scu.o platsmp-scu.o # IRQ objects diff --git a/arch/arm/mach-shmobile/include/mach/r8a7791.h b/arch/arm/mach-shmobile/include/mach/r8a7791.h index 2a86a5394672..051ead3c286e 100644 --- a/arch/arm/mach-shmobile/include/mach/r8a7791.h +++ b/arch/arm/mach-shmobile/include/mach/r8a7791.h @@ -5,5 +5,6 @@ void r8a7791_add_standard_devices(void); void r8a7791_add_dt_devices(void); void r8a7791_clock_init(void); void r8a7791_init_early(void); +extern struct smp_operations r8a7791_smp_ops; #endif /* __ASM_R8A7791_H__ */ diff --git a/arch/arm/mach-shmobile/setup-r8a7791.c b/arch/arm/mach-shmobile/setup-r8a7791.c index cb3859b4cc95..d9393d61ee27 100644 --- a/arch/arm/mach-shmobile/setup-r8a7791.c +++ b/arch/arm/mach-shmobile/setup-r8a7791.c @@ -176,6 +176,7 @@ static const char *r8a7791_boards_compat_dt[] __initdata = { }; DT_MACHINE_START(R8A7791_DT, "Generic R8A7791 (Flattened Device Tree)") + .smp = smp_ops(r8a7791_smp_ops), .init_early = r8a7791_init_early, .init_time = rcar_gen2_timer_init, .dt_compat = r8a7791_boards_compat_dt, diff --git a/arch/arm/mach-shmobile/smp-r8a7791.c b/arch/arm/mach-shmobile/smp-r8a7791.c new file mode 100644 index 000000000000..2df5bd190fe4 --- /dev/null +++ b/arch/arm/mach-shmobile/smp-r8a7791.c @@ -0,0 +1,62 @@ +/* + * SMP support for r8a7791 + * + * Copyright (C) 2013 Renesas Solutions Corp. + * Copyright (C) 2013 Magnus Damm + * + * 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 <asm/smp_plat.h> +#include <mach/common.h> +#include <mach/r8a7791.h> + +#define RST 0xe6160000 +#define CA15BAR 0x0020 +#define CA15RESCNT 0x0040 +#define RAM 0xe6300000 + +static void __init r8a7791_smp_prepare_cpus(unsigned int max_cpus) +{ + void __iomem *p; + u32 bar; + + /* let APMU code install data related to shmobile_boot_vector */ + shmobile_smp_apmu_prepare_cpus(max_cpus); + + /* RAM for jump stub, because BAR requires 256KB aligned address */ + p = ioremap_nocache(RAM, shmobile_boot_size); + memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size); + iounmap(p); + + /* setup reset vectors */ + p = ioremap_nocache(RST, 0x63); + bar = (RAM >> 8) & 0xfffffc00; + writel_relaxed(bar, p + CA15BAR); + writel_relaxed(bar | 0x10, p + CA15BAR); + + /* enable clocks to all CPUs */ + writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000, + p + CA15RESCNT); + iounmap(p); +} + +struct smp_operations r8a7791_smp_ops __initdata = { + .smp_prepare_cpus = r8a7791_smp_prepare_cpus, + .smp_boot_secondary = shmobile_smp_apmu_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_disable = shmobile_smp_cpu_disable, + .cpu_die = shmobile_smp_apmu_cpu_die, + .cpu_kill = shmobile_smp_apmu_cpu_kill, +#endif +}; |
