Initial file dump from open source releaseHEADmaster

1 files changed, 67 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 00000000..e38691b4
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-emev2.c
@@ -0,0 +1,67 @@
+/*
+ * 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>
+
+#define EMEV2_SCU_BASE 0x1e000000
+
+static int __cpuinit 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)
+{
+	scu_enable(shmobile_scu_base);
+
+	/* Tell ROM loader about our vector (in headsmp-scu.S) */
+	emev2_set_boot_vector(__pa(shmobile_secondary_vector_scu));
+
+	/* enable cache coherency on booting CPU */
+	scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
+}
+
+static void __init emev2_smp_init_cpus(void)
+{
+	unsigned int ncores;
+
+	/* setup EMEV2 specific SCU base */
+	shmobile_scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
+	emev2_clock_init(); /* need ioremapped SMU */
+
+	ncores = shmobile_scu_base ? scu_get_core_count(shmobile_scu_base) : 1;
+
+	shmobile_smp_init_cpus(ncores);
+}
+
+struct smp_operations emev2_smp_ops __initdata = {
+	.smp_init_cpus		= emev2_smp_init_cpus,
+	.smp_prepare_cpus	= emev2_smp_prepare_cpus,
+	.smp_boot_secondary	= emev2_boot_secondary,
+};