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/x86/cpu/quark/irq.c

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ * Copyright (C) 2015 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <asm/irq.h>
+#include <asm/arch/device.h>
+#include <asm/arch/quark.h>
+
+int quark_irq_router_probe(struct udevice *dev)
+{
+	struct quark_rcba *rcba;
+	u32 base;
+
+	qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, LB_RCBA, &base);
+	base &= ~MEM_BAR_EN;
+	rcba = (struct quark_rcba *)base;
+
+	/*
+	 * Route Quark PCI device interrupt pin to PIRQ
+	 *
+	 * Route device#23's INTA/B/C/D to PIRQA/B/C/D
+	 * Route device#20,21's INTA/B/C/D to PIRQE/F/G/H
+	 */
+	writew(PIRQC, &rcba->rmu_ir);
+	writew(PIRQA | (PIRQB << 4) | (PIRQC << 8) | (PIRQD << 12),
+	       &rcba->d23_ir);
+	writew(PIRQD, &rcba->core_ir);
+	writew(PIRQE | (PIRQF << 4) | (PIRQG << 8) | (PIRQH << 12),
+	       &rcba->d20d21_ir);
+
+	return irq_router_common_init(dev);
+}
+
+static const struct udevice_id quark_irq_router_ids[] = {
+	{ .compatible = "intel,quark-irq-router" },
+	{ }
+};
+
+U_BOOT_DRIVER(quark_irq_router_drv) = {
+	.name		= "quark_intel_irq",
+	.id		= UCLASS_IRQ,
+	.of_match	= quark_irq_router_ids,
+	.probe		= quark_irq_router_probe,
+};