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/include/asm/irq.h

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+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _ARCH_IRQ_H_
+#define _ARCH_IRQ_H_
+
+#include <dt-bindings/interrupt-router/intel-irq.h>
+
+/**
+ * Intel interrupt router configuration mechanism
+ *
+ * There are two known ways of Intel interrupt router configuration mechanism
+ * so far. On most cases, the IRQ routing configuraiton is controlled by PCI
+ * configuraiton registers on the legacy bridge, normally PCI BDF(0, 31, 0).
+ * On some newer platforms like BayTrail and Braswell, the IRQ routing is now
+ * in the IBASE register block where IBASE is memory-mapped.
+ */
+enum pirq_config {
+	PIRQ_VIA_PCI,
+	PIRQ_VIA_IBASE
+};
+
+/**
+ * Intel interrupt router control block
+ *
+ * Its members' value will be filled in based on device tree's input.
+ *
+ * @config:	PIRQ_VIA_PCI or PIRQ_VIA_IBASE
+ * @link_base:	link value base number
+ * @irq_mask:	IRQ mask reprenting the 16 IRQs in 8259, bit N is 1 means
+ *		IRQ N is available to be routed
+ * @lb_bdf:	irq router's PCI bus/device/function number encoding
+ * @ibase:	IBASE register block base address
+ * @actl_8bit:	ACTL register width is 8-bit (for ICH series chipset)
+ * @actl_addr:	ACTL register offset
+ */
+struct irq_router {
+	int config;
+	u32 link_base;
+	u16 irq_mask;
+	u32 bdf;
+	u32 ibase;
+	bool actl_8bit;
+	int actl_addr;
+};
+
+struct pirq_routing {
+	int bdf;
+	int pin;
+	int pirq;
+};
+
+/* PIRQ link number and value conversion */
+#define LINK_V2N(link, base)	(link - base)
+#define LINK_N2V(link, base)	(link + base)
+
+#define PIRQ_BITMAP		0xdef8
+
+/**
+ * irq_router_common_init() - Perform common x86 interrupt init
+ *
+ * This creates the PIRQ routing table and routes the IRQs
+ */
+int irq_router_common_init(struct udevice *dev);
+
+#endif /* _ARCH_IRQ_H_ */