1 files changed, 119 insertions, 0 deletions

diff --git a/kernel/arch/arm/mach-socfpga/socfpga.c b/kernel/arch/arm/mach-socfpga/socfpga.c
new file mode 100644
index 000000000..f5e597c20
--- /dev/null
+++ b/kernel/arch/arm/mach-socfpga/socfpga.c
@@ -0,0 +1,119 @@
+/*
+ *  Copyright (C) 2012 Altera Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/reboot.h>
+
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/cacheflush.h>
+
+#include "core.h"
+
+void __iomem *socfpga_scu_base_addr = ((void __iomem *)(SOCFPGA_SCU_VIRT_BASE));
+void __iomem *sys_manager_base_addr;
+void __iomem *rst_manager_base_addr;
+unsigned long socfpga_cpu1start_addr;
+
+static struct map_desc scu_io_desc __initdata = {
+	.virtual	= SOCFPGA_SCU_VIRT_BASE,
+	.pfn		= 0, /* run-time */
+	.length		= SZ_8K,
+	.type		= MT_DEVICE,
+};
+
+static struct map_desc uart_io_desc __initdata = {
+	.virtual	= 0xfec02000,
+	.pfn		= __phys_to_pfn(0xffc02000),
+	.length		= SZ_8K,
+	.type		= MT_DEVICE,
+};
+
+static void __init socfpga_scu_map_io(void)
+{
+	unsigned long base;
+
+	/* Get SCU base */
+	asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
+
+	scu_io_desc.pfn = __phys_to_pfn(base);
+	iotable_init(&scu_io_desc, 1);
+}
+
+static void __init socfpga_map_io(void)
+{
+	socfpga_scu_map_io();
+	iotable_init(&uart_io_desc, 1);
+	early_printk("Early printk initialized\n");
+}
+
+void __init socfpga_sysmgr_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
+
+	if (of_property_read_u32(np, "cpu1-start-addr",
+			(u32 *) &socfpga_cpu1start_addr))
+		pr_err("SMP: Need cpu1-start-addr in device tree.\n");
+
+	/* Ensure that socfpga_cpu1start_addr is visible to other CPUs */
+	smp_wmb();
+	sync_cache_w(&socfpga_cpu1start_addr);
+
+	sys_manager_base_addr = of_iomap(np, 0);
+
+	np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
+	rst_manager_base_addr = of_iomap(np, 0);
+}
+
+static void __init socfpga_init_irq(void)
+{
+	irqchip_init();
+	socfpga_sysmgr_init();
+}
+
+static void socfpga_cyclone5_restart(enum reboot_mode mode, const char *cmd)
+{
+	u32 temp;
+
+	temp = readl(rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
+
+	if (mode == REBOOT_HARD)
+		temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
+	else
+		temp |= RSTMGR_CTRL_SWWARMRSTREQ;
+	writel(temp, rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
+}
+
+static const char *altera_dt_match[] = {
+	"altr,socfpga",
+	NULL
+};
+
+DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
+	.l2c_aux_val	= 0,
+	.l2c_aux_mask	= ~0,
+	.smp		= smp_ops(socfpga_smp_ops),
+	.map_io		= socfpga_map_io,
+	.init_irq	= socfpga_init_irq,
+	.restart	= socfpga_cyclone5_restart,
+	.dt_compat	= altera_dt_match,
+MACHINE_END