Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / mach-keystone / platsmp.c

diff --git a/kernel/arch/arm/mach-keystone/platsmp.c b/kernel/arch/arm/mach-keystone/platsmp.c
new file mode 100644 (file)
index 0000000..5f46a7c
--- /dev/null
+++ b/kernel/arch/arm/mach-keystone/platsmp.c
@@ -0,0 +1,57 @@
+/*
+ * Keystone SOC SMP platform code
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ *     Cyril Chemparathy <cyril@ti.com>
+ *     Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * Based on 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/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/smp_plat.h>
+#include <asm/prom.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.h>
+
+#include "keystone.h"
+
+static int keystone_smp_boot_secondary(unsigned int cpu,
+                                               struct task_struct *idle)
+{
+       unsigned long start = virt_to_idmap(&secondary_startup);
+       int error;
+
+       pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
+                cpu, start);
+
+       error = keystone_cpu_smc(KEYSTONE_MON_CPU_UP_IDX, cpu, start);
+       if (error)
+               pr_err("CPU %d bringup failed with %d\n", cpu, error);
+
+       return error;
+}
+
+#ifdef CONFIG_ARM_LPAE
+static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{
+       pgd_t *pgd0 = pgd_offset_k(0);
+       cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
+       local_flush_tlb_all();
+}
+#else
+static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{}
+#endif
+
+struct smp_operations keystone_smp_ops __initdata = {
+       .smp_boot_secondary     = keystone_smp_boot_secondary,
+       .smp_secondary_init     = keystone_smp_secondary_initmem,
+};