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/post/lib_powerpc/multi.c

@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Load/store multiple word instructions:	lmw, stmw
+ *
+ * 27 consecutive words are loaded from a source memory buffer
+ * into GPRs r5 through r31. After that, 27 consecutive words are stored
+ * from the GPRs r5 through r31 into a target memory buffer. The contents
+ * of the source and target buffers are then compared.
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_02(ulong *code, ulong op1, ulong op2);
+
+int cpu_post_test_multi(void)
+{
+	int ret = 0;
+	unsigned int i;
+	ulong src[27], dst[27];
+	int flag = disable_interrupts();
+
+	ulong code[] = {
+		ASM_LMW(5, 3, 0),	/* lmw	r5, 0(r3)	*/
+		ASM_STMW(5, 4, 0),	/* stmr	r5, 0(r4)	*/
+		ASM_BLR,		/* blr			*/
+	};
+
+	for (i = 0; i < ARRAY_SIZE(src); ++i) {
+		src[i] = i;
+		dst[i] = 0;
+	}
+
+	cpu_post_exec_02(code, (ulong) src, (ulong) dst);
+
+	ret = memcmp(src, dst, sizeof(dst)) == 0 ? 0 : -1;
+
+	if (ret != 0)
+		post_log("Error at multi test !\n");
+
+	if (flag)
+		enable_interrupts();
+
+	return ret;
+}
+
+#endif