1 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
new file mode 100644
index 000000000000..f88595abc471
--- /dev/null
+++ b/arch/arm/mach-tegra/pm.c
@@ -0,0 +1,74 @@
+/*
+ * CPU complex suspend & resume functions for Tegra SoCs
+ *
+ * Copyright (c) 2009-2012, NVIDIA Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/cpumask.h>
+
+#include "iomap.h"
+#include "reset.h"
+
+#ifdef CONFIG_PM_SLEEP
+static unsigned int g_diag_reg;
+static DEFINE_SPINLOCK(tegra_lp2_lock);
+
+void save_cpu_arch_register(void)
+{
+	/* read diagnostic register */
+	asm("mrc p15, 0, %0, c15, c0, 1" : "=r"(g_diag_reg) : : "cc");
+	return;
+}
+
+void restore_cpu_arch_register(void)
+{
+	/* write diagnostic register */
+	asm("mcr p15, 0, %0, c15, c0, 1" : : "r"(g_diag_reg) : "cc");
+	return;
+}
+
+void __cpuinit tegra_clear_cpu_in_lp2(int phy_cpu_id)
+{
+	u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
+
+	spin_lock(&tegra_lp2_lock);
+
+	BUG_ON(!(*cpu_in_lp2 & BIT(phy_cpu_id)));
+	*cpu_in_lp2 &= ~BIT(phy_cpu_id);
+
+	spin_unlock(&tegra_lp2_lock);
+}
+
+bool __cpuinit tegra_set_cpu_in_lp2(int phy_cpu_id)
+{
+	bool last_cpu = false;
+	cpumask_t *cpu_lp2_mask = tegra_cpu_lp2_mask;
+	u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
+
+	spin_lock(&tegra_lp2_lock);
+
+	BUG_ON((*cpu_in_lp2 & BIT(phy_cpu_id)));
+	*cpu_in_lp2 |= BIT(phy_cpu_id);
+
+	if ((phy_cpu_id == 0) && cpumask_equal(cpu_lp2_mask, cpu_online_mask))
+		last_cpu = true;
+
+	spin_unlock(&tegra_lp2_lock);
+	return last_cpu;
+}
+#endif