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/m68k/lib/cache.c

@@ -0,0 +1,143 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/immap.h>
+#include <asm/cache.h>
+
+volatile int *cf_icache_status = (int *)ICACHE_STATUS;
+volatile int *cf_dcache_status = (int *)DCACHE_STATUS;
+
+void flush_cache(ulong start_addr, ulong size)
+{
+	/* Must be implemented for all M68k processors with copy-back data cache */
+}
+
+int icache_status(void)
+{
+	return *cf_icache_status;
+}
+
+int dcache_status(void)
+{
+	return *cf_dcache_status;
+}
+
+void icache_enable(void)
+{
+	icache_invalid();
+
+	*cf_icache_status = 1;
+
+#ifdef CONFIG_CF_V4
+	__asm__ __volatile__("movec %0, %%acr2"::"r"(CONFIG_SYS_CACHE_ACR2));
+	__asm__ __volatile__("movec %0, %%acr3"::"r"(CONFIG_SYS_CACHE_ACR3));
+#elif defined(CONFIG_CF_V4e)
+	__asm__ __volatile__("movec %0, %%acr6"::"r"(CONFIG_SYS_CACHE_ACR6));
+	__asm__ __volatile__("movec %0, %%acr7"::"r"(CONFIG_SYS_CACHE_ACR7));
+#else
+	__asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0));
+	__asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1));
+#endif
+
+	__asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_ICACR));
+}
+
+void icache_disable(void)
+{
+	u32 temp = 0;
+
+	*cf_icache_status = 0;
+	icache_invalid();
+
+#ifdef CONFIG_CF_V4
+	__asm__ __volatile__("movec %0, %%acr2"::"r"(temp));
+	__asm__ __volatile__("movec %0, %%acr3"::"r"(temp));
+#elif defined(CONFIG_CF_V4e)
+	__asm__ __volatile__("movec %0, %%acr6"::"r"(temp));
+	__asm__ __volatile__("movec %0, %%acr7"::"r"(temp));
+#else
+	__asm__ __volatile__("movec %0, %%acr0"::"r"(temp));
+	__asm__ __volatile__("movec %0, %%acr1"::"r"(temp));
+
+#endif
+}
+
+void icache_invalid(void)
+{
+	u32 temp;
+
+	temp = CONFIG_SYS_ICACHE_INV;
+	if (*cf_icache_status)
+		temp |= CONFIG_SYS_CACHE_ICACR;
+
+	__asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
+}
+
+/*
+ * data cache only for ColdFire V4 such as MCF547x_8x, MCF5445x
+ * the dcache will be dummy in ColdFire V2 and V3
+ */
+void dcache_enable(void)
+{
+	dcache_invalid();
+	*cf_dcache_status = 1;
+
+#ifdef CONFIG_CF_V4
+	__asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0));
+	__asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1));
+#elif defined(CONFIG_CF_V4e)
+	__asm__ __volatile__("movec %0, %%acr4"::"r"(CONFIG_SYS_CACHE_ACR4));
+	__asm__ __volatile__("movec %0, %%acr5"::"r"(CONFIG_SYS_CACHE_ACR5));
+
+#endif
+
+	__asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_DCACR));
+}
+
+void dcache_disable(void)
+{
+	u32 temp = 0;
+
+	*cf_dcache_status = 0;
+	dcache_invalid();
+
+	__asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
+
+#ifdef CONFIG_CF_V4
+	__asm__ __volatile__("movec %0, %%acr0"::"r"(temp));
+	__asm__ __volatile__("movec %0, %%acr1"::"r"(temp));
+#elif defined(CONFIG_CF_V4e)
+	__asm__ __volatile__("movec %0, %%acr4"::"r"(temp));
+	__asm__ __volatile__("movec %0, %%acr5"::"r"(temp));
+
+#endif
+}
+
+void dcache_invalid(void)
+{
+#ifdef CONFIG_CF_V4
+	u32 temp;
+
+	temp = CONFIG_SYS_DCACHE_INV;
+	if (*cf_dcache_status)
+		temp |= CONFIG_SYS_CACHE_DCACR;
+	if (*cf_icache_status)
+		temp |= CONFIG_SYS_CACHE_ICACR;
+
+	__asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
+#endif
+}
+
+__weak void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+	/* An empty stub, real implementation should be in platform code */
+}
+__weak void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+	/* An empty stub, real implementation should be in platform code */
+}