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Diffstat (limited to 'arch/arm/mach-shmobile/smp-r8a7790.c')
-rw-r--r--arch/arm/mach-shmobile/smp-r8a7790.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/smp-r8a7790.c b/arch/arm/mach-shmobile/smp-r8a7790.c
new file mode 100644
index 000000000000..015e2753de1f
--- /dev/null
+++ b/arch/arm/mach-shmobile/smp-r8a7790.c
@@ -0,0 +1,67 @@
+/*
+ * SMP support for r8a7790
+ *
+ * Copyright (C) 2012-2013 Renesas Solutions Corp.
+ * Copyright (C) 2012 Takashi Yoshii <takashi.yoshii.ze@renesas.com>
+ *
+ * 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>
+
+#define RST 0xe6160000
+#define CA15BAR 0x0020
+#define CA7BAR 0x0030
+#define CA15RESCNT 0x0040
+#define CA7RESCNT 0x0044
+#define MERAM 0xe8080000
+
+static void __init r8a7790_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);
+
+ /* MERAM for jump stub, because BAR requires 256KB aligned address */
+ p = ioremap_nocache(MERAM, shmobile_boot_size);
+ memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
+ iounmap(p);
+
+ /* setup reset vectors */
+ p = ioremap_nocache(RST, 0x63);
+ bar = (MERAM >> 8) & 0xfffffc00;
+ writel_relaxed(bar, p + CA15BAR);
+ writel_relaxed(bar, p + CA7BAR);
+ writel_relaxed(bar | 0x10, p + CA15BAR);
+ writel_relaxed(bar | 0x10, p + CA7BAR);
+
+ /* enable clocks to all CPUs */
+ writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
+ p + CA15RESCNT);
+ writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
+ p + CA7RESCNT);
+ iounmap(p);
+}
+
+struct smp_operations r8a7790_smp_ops __initdata = {
+ .smp_prepare_cpus = r8a7790_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
+};