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-rw-r--r--arch/arm/mach-alpine/platsmp.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-alpine/platsmp.c b/arch/arm/mach-alpine/platsmp.c
new file mode 100644
index 0000000000..fc4bba2902
--- /dev/null
+++ b/arch/arm/mach-alpine/platsmp.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SMP operations for Alpine platform.
+ *
+ * Copyright (C) 2015 Annapurna Labs Ltd.
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/of.h>
+
+#include <asm/smp_plat.h>
+
+#include "alpine_cpu_pm.h"
+
+static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ phys_addr_t addr;
+
+ addr = __pa_symbol(secondary_startup);
+
+ if (addr > (phys_addr_t)(uint32_t)(-1)) {
+ pr_err("FAIL: resume address over 32bit (%pa)", &addr);
+ return -EINVAL;
+ }
+
+ return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr);
+}
+
+static void __init alpine_smp_prepare_cpus(unsigned int max_cpus)
+{
+ alpine_cpu_pm_init();
+}
+
+static const struct smp_operations alpine_smp_ops __initconst = {
+ .smp_prepare_cpus = alpine_smp_prepare_cpus,
+ .smp_boot_secondary = alpine_boot_secondary,
+};
+CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);