1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/src.c b/arch/arm/mach-imx/src.c
new file mode 100644
index 000000000000..4bde04f99e38
--- /dev/null
+++ b/arch/arm/mach-imx/src.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/smp.h>
+#include <asm/unified.h>
+
+#define SRC_SCR				0x000
+#define SRC_GPR1			0x020
+#define BP_SRC_SCR_WARM_RESET_ENABLE	0
+#define BP_SRC_SCR_CORE1_RST		14
+#define BP_SRC_SCR_CORE1_ENABLE		22
+
+static void __iomem *src_base;
+
+#ifndef CONFIG_SMP
+#define cpu_logical_map(cpu)		0
+#endif
+
+void imx_enable_cpu(int cpu, bool enable)
+{
+	u32 mask, val;
+
+	cpu = cpu_logical_map(cpu);
+	mask = 1 << (BP_SRC_SCR_CORE1_ENABLE + cpu - 1);
+	val = readl_relaxed(src_base + SRC_SCR);
+	val = enable ? val | mask : val & ~mask;
+	writel_relaxed(val, src_base + SRC_SCR);
+}
+
+void imx_set_cpu_jump(int cpu, void *jump_addr)
+{
+	cpu = cpu_logical_map(cpu);
+	writel_relaxed(BSYM(virt_to_phys(jump_addr)),
+		       src_base + SRC_GPR1 + cpu * 8);
+}
+
+void imx_src_prepare_restart(void)
+{
+	u32 val;
+
+	/* clear enable bits of secondary cores */
+	val = readl_relaxed(src_base + SRC_SCR);
+	val &= ~(0x7 << BP_SRC_SCR_CORE1_ENABLE);
+	writel_relaxed(val, src_base + SRC_SCR);
+
+	/* clear persistent entry register of primary core */
+	writel_relaxed(0, src_base + SRC_GPR1);
+}
+
+void __init imx_src_init(void)
+{
+	struct device_node *np;
+	u32 val;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-src");
+	src_base = of_iomap(np, 0);
+	WARN_ON(!src_base);
+
+	/*
+	 * force warm reset sources to generate cold reset
+	 * for a more reliable restart
+	 */
+	val = readl_relaxed(src_base + SRC_SCR);
+	val &= ~(1 << BP_SRC_SCR_WARM_RESET_ENABLE);
+	writel_relaxed(val, src_base + SRC_SCR);
+}