avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/arch/arm/mach-socfpga/reset_manager.c

@@ -0,0 +1,120 @@
+/*
+ *  Copyright (C) 2013 Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/fpga_manager.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static const struct socfpga_reset_manager *reset_manager_base =
+		(void *)SOCFPGA_RSTMGR_ADDRESS;
+static struct socfpga_system_manager *sysmgr_regs =
+	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+
+/* Assert or de-assert SoCFPGA reset manager reset. */
+void socfpga_per_reset(u32 reset, int set)
+{
+	const void *reg;
+
+	if (RSTMGR_BANK(reset) == 0)
+		reg = &reset_manager_base->mpu_mod_reset;
+	else if (RSTMGR_BANK(reset) == 1)
+		reg = &reset_manager_base->per_mod_reset;
+	else if (RSTMGR_BANK(reset) == 2)
+		reg = &reset_manager_base->per2_mod_reset;
+	else if (RSTMGR_BANK(reset) == 3)
+		reg = &reset_manager_base->brg_mod_reset;
+	else if (RSTMGR_BANK(reset) == 4)
+		reg = &reset_manager_base->misc_mod_reset;
+	else	/* Invalid reset register, do nothing */
+		return;
+
+	if (set)
+		setbits_le32(reg, 1 << RSTMGR_RESET(reset));
+	else
+		clrbits_le32(reg, 1 << RSTMGR_RESET(reset));
+}
+
+/*
+ * Assert reset on every peripheral but L4WD0.
+ * Watchdog must be kept intact to prevent glitches
+ * and/or hangs.
+ */
+void socfpga_per_reset_all(void)
+{
+	const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
+
+	writel(~l4wd0, &reset_manager_base->per_mod_reset);
+	writel(0xffffffff, &reset_manager_base->per2_mod_reset);
+}
+
+/*
+ * Write the reset manager register to cause reset
+ */
+void reset_cpu(ulong addr)
+{
+	/* request a warm reset */
+	writel((1 << RSTMGR_CTRL_SWWARMRSTREQ_LSB),
+		&reset_manager_base->ctrl);
+	/*
+	 * infinite loop here as watchdog will trigger and reset
+	 * the processor
+	 */
+	while (1)
+		;
+}
+
+/*
+ * Release peripherals from reset based on handoff
+ */
+void reset_deassert_peripherals_handoff(void)
+{
+	writel(0, &reset_manager_base->per_mod_reset);
+}
+
+#if defined(CONFIG_SOCFPGA_VIRTUAL_TARGET)
+void socfpga_bridges_reset(int enable)
+{
+	/* For SoCFPGA-VT, this is NOP. */
+}
+#else
+
+#define L3REGS_REMAP_LWHPS2FPGA_MASK	0x10
+#define L3REGS_REMAP_HPS2FPGA_MASK	0x08
+#define L3REGS_REMAP_OCRAM_MASK		0x01
+
+void socfpga_bridges_reset(int enable)
+{
+	const uint32_t l3mask = L3REGS_REMAP_LWHPS2FPGA_MASK |
+				L3REGS_REMAP_HPS2FPGA_MASK |
+				L3REGS_REMAP_OCRAM_MASK;
+
+	if (enable) {
+		/* brdmodrst */
+		writel(0xffffffff, &reset_manager_base->brg_mod_reset);
+	} else {
+		writel(0, &sysmgr_regs->iswgrp_handoff[0]);
+		writel(l3mask, &sysmgr_regs->iswgrp_handoff[1]);
+
+		/* Check signal from FPGA. */
+		if (!fpgamgr_test_fpga_ready()) {
+			/* FPGA not ready, do nothing. */
+			printf("%s: FPGA not ready, aborting.\n", __func__);
+			return;
+		}
+
+		/* brdmodrst */
+		writel(0, &reset_manager_base->brg_mod_reset);
+
+		/* Remap the bridges into memory map */
+		writel(l3mask, SOCFPGA_L3REGS_ADDRESS);
+	}
+}
+#endif