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/config.mk

@@ -0,0 +1,67 @@
+#
+# (C) Copyright 2000-2002
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+CONFIG_STANDALONE_LOAD_ADDR ?= 0x40000
+
+PLATFORM_CPPFLAGS += -fno-strict-aliasing
+PLATFORM_CPPFLAGS += -fomit-frame-pointer
+PF_CPPFLAGS_X86   := $(call cc-option, -fno-toplevel-reorder, \
+		       $(call cc-option, -fno-unit-at-a-time)) \
+		     $(call cc-option, -mpreferred-stack-boundary=2)
+
+PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_X86)
+PLATFORM_CPPFLAGS += -fno-dwarf2-cfi-asm
+PLATFORM_CPPFLAGS += -march=i386 -m32
+
+PLATFORM_RELFLAGS += -ffunction-sections -fvisibility=hidden
+
+PLATFORM_LDFLAGS += -Bsymbolic -Bsymbolic-functions -m elf_i386
+
+LDFLAGS_FINAL += --wrap=__divdi3 --wrap=__udivdi3
+LDFLAGS_FINAL += --wrap=__moddi3 --wrap=__umoddi3
+
+# This is used in the top-level Makefile which does not include
+# PLATFORM_LDFLAGS
+LDFLAGS_EFI_PAYLOAD := -Bsymbolic -Bsymbolic-functions -shared --no-undefined
+
+OBJCOPYFLAGS_EFI := -j .text -j .sdata -j .data -j .dynamic -j .dynsym \
+	-j .rel -j .rela -j .reloc
+
+CFLAGS_NON_EFI := -mregparm=3
+CFLAGS_EFI := -fpic -fshort-wchar
+
+ifeq ($(CONFIG_EFI_STUB_64BIT),)
+CFLAGS_EFI += $(call cc-option, -mno-red-zone)
+EFIARCH = ia32
+EFIPAYLOAD_BFDTARGET = elf32-i386
+else
+EFIARCH = x86_64
+EFIPAYLOAD_BFDTARGET = elf64-x86-64
+endif
+
+EFIPAYLOAD_BFDARCH = i386
+
+LDSCRIPT_EFI := $(srctree)/$(CPUDIR)/efi/elf_$(EFIARCH)_efi.lds
+EFISTUB := crt0-efi-$(EFIARCH).o reloc_$(EFIARCH).o
+OBJCOPYFLAGS_EFI += --target=efi-app-$(EFIARCH)
+
+CPPFLAGS_REMOVE_crt0-efi-$(EFIARCH).o += $(CFLAGS_NON_EFI)
+CPPFLAGS_crt0-efi-$(EFIARCH).o += $(CFLAGS_EFI)
+
+ifeq ($(CONFIG_EFI_APP),y)
+
+PLATFORM_CPPFLAGS += $(CFLAGS_EFI)
+LDFLAGS_FINAL += -znocombreloc -shared
+LDSCRIPT := $(LDSCRIPT_EFI)
+
+else
+
+PLATFORM_CPPFLAGS += $(CFLAGS_NON_EFI)
+PLATFORM_LDFLAGS += --emit-relocs
+LDFLAGS_FINAL += --gc-sections -pie
+
+endif