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/include/pci_rom.h

@@ -0,0 +1,68 @@
+/*
+ * From coreboot file of same name
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _PCI_ROM_H
+#define _PCI_ROM_H
+
+#define PCI_ROM_HDR			0xaa55
+
+struct pci_rom_header {
+	uint16_t signature;
+	uint8_t size;
+	uint8_t init[3];
+	uint8_t reserved[0x12];
+	uint16_t data;
+};
+
+struct pci_rom_data {
+	uint32_t signature;
+	uint16_t vendor;
+	uint16_t device;
+	uint16_t reserved_1;
+	uint16_t dlen;
+	uint8_t drevision;
+	uint8_t class_lo;
+	uint16_t class_hi;
+	uint16_t ilen;
+	uint16_t irevision;
+	uint8_t type;
+	uint8_t indicator;
+	uint16_t reserved_2;
+};
+
+/*
+ * Determines which execution method is used and whether we allow falling back
+ * to the other if the requested method is not available.
+ */
+enum pci_rom_emul {
+	PCI_ROM_EMULATE		= 0 << 0,
+	PCI_ROM_USE_NATIVE	= 1 << 0,
+	PCI_ROM_ALLOW_FALLBACK	= 1 << 1,
+};
+
+ /**
+ * dm_pci_run_vga_bios() - Run the VGA BIOS in an x86 PC
+ *
+ * @dev:	Video device containing the BIOS
+ * @int15_handler:	Function to call to handle int 0x15
+ * @exec_method:	flags from enum pci_rom_emul
+ */
+int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
+			int exec_method);
+
+/**
+ * board_map_oprom_vendev() - map several PCI IDs to the one the ROM expects
+ *
+ * Some VGA option roms are used for several chipsets but they only have one
+ * PCI ID in their header. If we encounter such an option rom, we need to do
+ * the mapping ourselves.
+ *
+ * @vendev:	Vendor and device for the video device
+ * @return standard vendor and device expected by the ROM
+ */
+uint32_t board_map_oprom_vendev(uint32_t vendev);
+
+#endif