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/mips/include/asm/mach-generic/cpu-feature-overrides.h

@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2003 Ralf Baechle
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+#ifndef __ASM_MACH_GENERIC_CPU_FEATURE_OVERRIDES_H
+#define __ASM_MACH_GENERIC_CPU_FEATURE_OVERRIDES_H
+
+/* Intentionally empty file ...	 */
+
+#endif /* __ASM_MACH_GENERIC_CPU_FEATURE_OVERRIDES_H */

u-boot/arch/mips/include/asm/mach-generic/ioremap.h

@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+#ifndef __ASM_MACH_GENERIC_IOREMAP_H
+#define __ASM_MACH_GENERIC_IOREMAP_H
+
+#include <linux/types.h>
+
+/*
+ * Allow physical addresses to be fixed up to help peripherals located
+ * outside the low 32-bit range -- generic pass-through version.
+ */
+static inline phys_addr_t fixup_bigphys_addr(phys_addr_t phys_addr,
+						phys_addr_t size)
+{
+	return phys_addr;
+}
+
+static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
+						unsigned long flags)
+{
+	return NULL;
+}
+
+static inline int plat_iounmap(const volatile void __iomem *addr)
+{
+	return 0;
+}
+
+#define _page_cachable_default	_CACHE_CACHABLE_NONCOHERENT
+
+#endif /* __ASM_MACH_GENERIC_IOREMAP_H */

u-boot/arch/mips/include/asm/mach-generic/mangle-port.h

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2003, 2004 Ralf Baechle
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+#ifndef __ASM_MACH_GENERIC_MANGLE_PORT_H
+#define __ASM_MACH_GENERIC_MANGLE_PORT_H
+
+#define __swizzle_addr_b(port)	(port)
+#define __swizzle_addr_w(port)	(port)
+#define __swizzle_addr_l(port)	(port)
+#define __swizzle_addr_q(port)	(port)
+
+/*
+ * Sane hardware offers swapping of PCI/ISA I/O space accesses in hardware;
+ * less sane hardware forces software to fiddle with this...
+ *
+ * Regardless, if the host bus endianness mismatches that of PCI/ISA, then
+ * you can't have the numerical value of data and byte addresses within
+ * multibyte quantities both preserved at the same time.  Hence two
+ * variations of functions: non-prefixed ones that preserve the value
+ * and prefixed ones that preserve byte addresses.  The latters are
+ * typically used for moving raw data between a peripheral and memory (cf.
+ * string I/O functions), hence the "__mem_" prefix.
+ */
+#if defined(CONFIG_SWAP_IO_SPACE)
+
+# define ioswabb(a, x)		(x)
+# define __mem_ioswabb(a, x)	(x)
+# define ioswabw(a, x)		le16_to_cpu(x)
+# define __mem_ioswabw(a, x)	(x)
+# define ioswabl(a, x)		le32_to_cpu(x)
+# define __mem_ioswabl(a, x)	(x)
+# define ioswabq(a, x)		le64_to_cpu(x)
+# define __mem_ioswabq(a, x)	(x)
+
+#else
+
+# define ioswabb(a, x)		(x)
+# define __mem_ioswabb(a, x)	(x)
+# define ioswabw(a, x)		(x)
+# define __mem_ioswabw(a, x)	cpu_to_le16(x)
+# define ioswabl(a, x)		(x)
+# define __mem_ioswabl(a, x)	cpu_to_le32(x)
+# define ioswabq(a, x)		(x)
+# define __mem_ioswabq(a, x)	cpu_to_le32(x)
+
+#endif
+
+#endif /* __ASM_MACH_GENERIC_MANGLE_PORT_H */

u-boot/arch/mips/include/asm/mach-generic/spaces.h

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 1994 - 1999, 2000, 03, 04 Ralf Baechle
+ * Copyright (C) 2000, 2002  Maciej W. Rozycki
+ * Copyright (C) 1990, 1999, 2000 Silicon Graphics, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+#ifndef _ASM_MACH_GENERIC_SPACES_H
+#define _ASM_MACH_GENERIC_SPACES_H
+
+#include <asm/const.h>
+
+/*
+ * This gives the physical RAM offset.
+ */
+#ifndef PHYS_OFFSET
+#define PHYS_OFFSET		_AC(0, UL)
+#endif
+
+#ifdef CONFIG_32BIT
+#ifdef CONFIG_KVM_GUEST
+#define CAC_BASE		_AC(0x40000000, UL)
+#else
+#define CAC_BASE		_AC(0x80000000, UL)
+#endif
+#ifndef IO_BASE
+#define IO_BASE			_AC(0xa0000000, UL)
+#endif
+#ifndef UNCAC_BASE
+#define UNCAC_BASE		_AC(0xa0000000, UL)
+#endif
+
+#ifndef MAP_BASE
+#ifdef CONFIG_KVM_GUEST
+#define MAP_BASE		_AC(0x60000000, UL)
+#else
+#define MAP_BASE		_AC(0xc0000000, UL)
+#endif
+#endif
+
+/*
+ * Memory above this physical address will be considered highmem.
+ */
+#ifndef HIGHMEM_START
+#define HIGHMEM_START		_AC(0x20000000, UL)
+#endif
+
+#endif /* CONFIG_32BIT */
+
+#ifdef CONFIG_64BIT
+
+#ifndef CAC_BASE
+#ifdef CONFIG_DMA_NONCOHERENT
+#define CAC_BASE		_AC(0x9800000000000000, UL)
+#else
+#define CAC_BASE		_AC(0xa800000000000000, UL)
+#endif
+#endif
+
+#ifndef IO_BASE
+#define IO_BASE			_AC(0x9000000000000000, UL)
+#endif
+
+#ifndef UNCAC_BASE
+#define UNCAC_BASE		_AC(0x9000000000000000, UL)
+#endif
+
+#ifndef MAP_BASE
+#define MAP_BASE		_AC(0xc000000000000000, UL)
+#endif
+
+/*
+ * Memory above this physical address will be considered highmem.
+ * Fixme: 59 bits is a fictive number and makes assumptions about processors
+ * in the distant future.  Nobody will care for a few years :-)
+ */
+#ifndef HIGHMEM_START
+#define HIGHMEM_START		(_AC(1, UL) << _AC(59, UL))
+#endif
+
+#define TO_PHYS(x)		(	      ((x) & TO_PHYS_MASK))
+#define TO_CAC(x)		(CAC_BASE   | ((x) & TO_PHYS_MASK))
+#define TO_UNCAC(x)		(UNCAC_BASE | ((x) & TO_PHYS_MASK))
+
+#endif /* CONFIG_64BIT */
+
+/*
+ * This handles the memory map.
+ */
+#ifndef PAGE_OFFSET
+#define PAGE_OFFSET		(CAC_BASE + PHYS_OFFSET)
+#endif
+
+#ifndef FIXADDR_TOP
+#ifdef CONFIG_KVM_GUEST
+#define FIXADDR_TOP		((unsigned long)(long)(int)0x7ffe0000)
+#else
+#define FIXADDR_TOP		((unsigned long)(long)(int)0xfffe0000)
+#endif
+#endif
+
+#endif /* __ASM_MACH_GENERIC_SPACES_H */