diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-shmobile/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/board-kzm9d.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/clock-emev2.c | 18 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/emev2.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/platsmp.c | 17 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/setup-emev2.c | 24 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/smp-emev2.c | 97 |
7 files changed, 165 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index 87bc110a9be..c795335931c 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -19,6 +19,7 @@ smp-y := platsmp.o headsmp.o smp-$(CONFIG_HOTPLUG_CPU) += hotplug.o smp-$(CONFIG_ARCH_SH73A0) += smp-sh73a0.o smp-$(CONFIG_ARCH_R8A7779) += smp-r8a7779.o +smp-$(CONFIG_ARCH_EMEV2) += smp-emev2.o # Pinmux setup pfc-y := diff --git a/arch/arm/mach-shmobile/board-kzm9d.c b/arch/arm/mach-shmobile/board-kzm9d.c index e743f902043..42fc4794c9e 100644 --- a/arch/arm/mach-shmobile/board-kzm9d.c +++ b/arch/arm/mach-shmobile/board-kzm9d.c @@ -27,6 +27,7 @@ #include <asm/hardware/gic.h> MACHINE_START(KZM9D, "kzm9d") + .map_io = emev2_map_io, .init_early = emev2_add_early_devices, .nr_irqs = NR_IRQS_LEGACY, .init_irq = emev2_init_irq, diff --git a/arch/arm/mach-shmobile/clock-emev2.c b/arch/arm/mach-shmobile/clock-emev2.c index 73a12165931..5bc97de4a1e 100644 --- a/arch/arm/mach-shmobile/clock-emev2.c +++ b/arch/arm/mach-shmobile/clock-emev2.c @@ -40,6 +40,7 @@ #define USIB2SCLKDIV 0x65c #define USIB3SCLKDIV 0x660 #define STI_CLKSEL 0x688 +#define SMU_GENERAL_REG0 0x7c0 /* not pretty, but hey */ static void __iomem *smu_base; @@ -50,6 +51,11 @@ static void emev2_smu_write(unsigned long value, int offs) iowrite32(value, smu_base + offs); } +void emev2_set_boot_vector(unsigned long value) +{ + emev2_smu_write(value, SMU_GENERAL_REG0); +} + static struct clk_mapping smu_mapping = { .phys = EMEV2_SMU_BASE, .len = PAGE_SIZE, @@ -194,6 +200,18 @@ static struct clk_lookup lookups[] = { void __init emev2_clock_init(void) { int k, ret = 0; + static int is_setup; + + /* yuck, this is ugly as hell, but the non-smp case of clocks + * code is now designed to rely on ioremap() instead of static + * entity maps. in the case of smp we need access to the SMU + * register earlier than ioremap() is actually working without + * any static maps. to enable SMP in ugly but with dynamic + * mappings we have to call emev2_clock_init() from different + * places depending on UP and SMP... + */ + if (is_setup++) + return; smu_base = ioremap(EMEV2_SMU_BASE, PAGE_SIZE); BUG_ON(!smu_base); diff --git a/arch/arm/mach-shmobile/include/mach/emev2.h b/arch/arm/mach-shmobile/include/mach/emev2.h index 92646c1de61..3fc71841985 100644 --- a/arch/arm/mach-shmobile/include/mach/emev2.h +++ b/arch/arm/mach-shmobile/include/mach/emev2.h @@ -1,9 +1,16 @@ #ifndef __ASM_EMEV2_H__ #define __ASM_EMEV2_H__ +extern void emev2_map_io(void); extern void emev2_init_irq(void); extern void emev2_add_early_devices(void); extern void emev2_add_standard_devices(void); extern void emev2_clock_init(void); +extern void emev2_set_boot_vector(unsigned long value); +extern unsigned int emev2_get_core_count(void); +extern int emev2_platform_cpu_kill(unsigned int cpu); +extern void emev2_secondary_init(unsigned int cpu); +extern int emev2_boot_secondary(unsigned int cpu); +extern void emev2_smp_prepare_cpus(void); #endif /* __ASM_EMEV2_H__ */ diff --git a/arch/arm/mach-shmobile/platsmp.c b/arch/arm/mach-shmobile/platsmp.c index 45fa3924c6a..959b021e52b 100644 --- a/arch/arm/mach-shmobile/platsmp.c +++ b/arch/arm/mach-shmobile/platsmp.c @@ -19,9 +19,11 @@ #include <asm/hardware/gic.h> #include <asm/mach-types.h> #include <mach/common.h> +#include <mach/emev2.h> #define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2()) #define is_r8a7779() machine_is_marzen() +#define is_emev2() machine_is_kzm9d() static unsigned int __init shmobile_smp_get_core_count(void) { @@ -31,6 +33,9 @@ static unsigned int __init shmobile_smp_get_core_count(void) if (is_r8a7779()) return r8a7779_get_core_count(); + if (is_emev2()) + return emev2_get_core_count(); + return 1; } @@ -41,6 +46,9 @@ static void __init shmobile_smp_prepare_cpus(void) if (is_r8a7779()) r8a7779_smp_prepare_cpus(); + + if (is_emev2()) + emev2_smp_prepare_cpus(); } int shmobile_platform_cpu_kill(unsigned int cpu) @@ -48,6 +56,9 @@ int shmobile_platform_cpu_kill(unsigned int cpu) if (is_r8a7779()) return r8a7779_platform_cpu_kill(cpu); + if (is_emev2()) + return emev2_platform_cpu_kill(cpu); + return 1; } @@ -60,6 +71,9 @@ void __cpuinit platform_secondary_init(unsigned int cpu) if (is_r8a7779()) r8a7779_secondary_init(cpu); + + if (is_emev2()) + emev2_secondary_init(cpu); } int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) @@ -70,6 +84,9 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) if (is_r8a7779()) return r8a7779_boot_secondary(cpu); + if (is_emev2()) + return emev2_boot_secondary(cpu); + return -ENOSYS; } diff --git a/arch/arm/mach-shmobile/setup-emev2.c b/arch/arm/mach-shmobile/setup-emev2.c index 9fff6233691..2a03a78abdd 100644 --- a/arch/arm/mach-shmobile/setup-emev2.c +++ b/arch/arm/mach-shmobile/setup-emev2.c @@ -34,6 +34,30 @@ #include <asm/mach/time.h> #include <asm/hardware/gic.h> +static struct map_desc emev2_io_desc[] __initdata = { +#ifdef CONFIG_SMP + /* 128K entity map for 0xe0100000 (SMU) */ + { + .virtual = 0xe0100000, + .pfn = __phys_to_pfn(0xe0100000), + .length = SZ_128K, + .type = MT_DEVICE + }, + /* 2M mapping for SCU + L2 controller */ + { + .virtual = 0xf0000000, + .pfn = __phys_to_pfn(0x1e000000), + .length = SZ_2M, + .type = MT_DEVICE + }, +#endif +}; + +void __init emev2_map_io(void) +{ + iotable_init(emev2_io_desc, ARRAY_SIZE(emev2_io_desc)); +} + /* UART */ static struct resource uart0_resources[] = { [0] = { diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c new file mode 100644 index 00000000000..6a35c4a31e6 --- /dev/null +++ b/arch/arm/mach-shmobile/smp-emev2.c @@ -0,0 +1,97 @@ +/* + * SMP support for Emma Mobile EV2 + * + * Copyright (C) 2012 Renesas Solutions Corp. + * Copyright (C) 2012 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#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 <mach/common.h> +#include <mach/emev2.h> +#include <asm/smp_plat.h> +#include <asm/smp_scu.h> +#include <asm/hardware/gic.h> +#include <asm/cacheflush.h> + +#define EMEV2_SCU_BASE 0x1e000000 + +static DEFINE_SPINLOCK(scu_lock); +static void __iomem *scu_base; + +static void modify_scu_cpu_psr(unsigned long set, unsigned long clr) +{ + unsigned long tmp; + + /* we assume this code is running on a different cpu + * than the one that is changing coherency setting */ + spin_lock(&scu_lock); + tmp = readl(scu_base + 8); + tmp &= ~clr; + tmp |= set; + writel(tmp, scu_base + 8); + spin_unlock(&scu_lock); + +} + +unsigned int __init emev2_get_core_count(void) +{ + if (!scu_base) { + scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE); + emev2_clock_init(); /* need ioremapped SMU */ + } + + WARN_ON_ONCE(!scu_base); + + return scu_base ? scu_get_core_count(scu_base) : 1; +} + +int emev2_platform_cpu_kill(unsigned int cpu) +{ + return 0; /* not supported yet */ +} + +void __cpuinit emev2_secondary_init(unsigned int cpu) +{ + gic_secondary_init(0); +} + +int __cpuinit emev2_boot_secondary(unsigned int cpu) +{ + cpu = cpu_logical_map(cpu); + + /* enable cache coherency */ + modify_scu_cpu_psr(0, 3 << (cpu * 8)); + + /* Tell ROM loader about our vector (in headsmp.S) */ + emev2_set_boot_vector(__pa(shmobile_secondary_vector)); + + gic_raise_softirq(cpumask_of(cpu), 1); + return 0; +} + +void __init emev2_smp_prepare_cpus(void) +{ + int cpu = cpu_logical_map(0); + + scu_enable(scu_base); + + /* enable cache coherency on CPU0 */ + modify_scu_cpu_psr(0, 3 << (cpu * 8)); +} |