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-rw-r--r--arch/arm/mach-hisi/platsmp.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm/mach-hisi/platsmp.c b/arch/arm/mach-hisi/platsmp.c
new file mode 100644
index 00000000000..471f1ee3be2
--- /dev/null
+++ b/arch/arm/mach-hisi/platsmp.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2013 Linaro Ltd.
+ * Copyright (c) 2013 Hisilicon Limited.
+ * Based on arch/arm/mach-vexpress/platsmp.c, Copyright (C) 2002 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "core.h"
+
+static void __iomem *ctrl_base;
+
+void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
+{
+ cpu = cpu_logical_map(cpu);
+ if (!cpu || !ctrl_base)
+ return;
+ writel_relaxed(virt_to_phys(jump_addr), ctrl_base + ((cpu - 1) << 2));
+}
+
+int hi3xxx_get_cpu_jump(int cpu)
+{
+ cpu = cpu_logical_map(cpu);
+ if (!cpu || !ctrl_base)
+ return 0;
+ return readl_relaxed(ctrl_base + ((cpu - 1) << 2));
+}
+
+static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *np = NULL;
+ unsigned long base = 0;
+ u32 offset = 0;
+ void __iomem *scu_base = NULL;
+
+ if (scu_a9_has_base()) {
+ base = scu_a9_get_base();
+ scu_base = ioremap(base, SZ_4K);
+ if (!scu_base) {
+ pr_err("ioremap(scu_base) failed\n");
+ return;
+ }
+ scu_enable(scu_base);
+ iounmap(scu_base);
+ }
+ if (!ctrl_base) {
+ np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
+ if (!np) {
+ pr_err("failed to find hisilicon,sysctrl node\n");
+ return;
+ }
+ ctrl_base = of_iomap(np, 0);
+ if (!ctrl_base) {
+ pr_err("failed to map address\n");
+ return;
+ }
+ if (of_property_read_u32(np, "smp-offset", &offset) < 0) {
+ pr_err("failed to find smp-offset property\n");
+ return;
+ }
+ ctrl_base += offset;
+ }
+}
+
+static int hi3xxx_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ hi3xxx_set_cpu(cpu, true);
+ hi3xxx_set_cpu_jump(cpu, secondary_startup);
+ arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+ return 0;
+}
+
+struct smp_operations hi3xxx_smp_ops __initdata = {
+ .smp_prepare_cpus = hi3xxx_smp_prepare_cpus,
+ .smp_boot_secondary = hi3xxx_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_die = hi3xxx_cpu_die,
+ .cpu_kill = hi3xxx_cpu_kill,
+#endif
+};