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/board/esd/common/cmd_loadpci.c

@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2005-2008
+ * Matthias Fuchs, esd GmbH Germany, matthias.fuchs@esd-electronics.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <console.h>
+#if !defined(CONFIG_440)
+#include <asm/4xx_pci.h>
+#endif
+
+#if defined(CONFIG_CMD_BSP)
+#define ADDRMASK 0xfffff000
+
+/*
+ * Command loadpci: wait for signal from host and boot image.
+ */
+int do_loadpci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	u32 *ptr = 0;
+	int count = 0;
+	int count2 = 0;
+	char addr[16];
+	char str[] = "\\|/-";
+	u32 la, ptm1la;
+
+#if defined(CONFIG_440)
+	ptm1la = in32r(PCIL0_PTM1LA);
+#else
+	ptm1la = in32r(PTM1LA);
+#endif
+	while(1) {
+		/*
+		 * Mark sync address
+		 */
+		ptr = (u32 *)ptm1la;
+		memset(ptr, 0, 0x20);
+
+		*ptr = 0xffffffff;
+		puts("\nWaiting for action from pci host -");
+
+		/*
+		 * Wait for host to write the start address
+		 */
+		while (*ptr == 0xffffffff) {
+			count++;
+			if (!(count % 100)) {
+				count2++;
+				putc(0x08); /* backspace */
+				putc(str[count2 % 4]);
+			}
+
+			/* Abort if ctrl-c was pressed */
+			if (ctrlc()) {
+				puts("\nAbort\n");
+				return 0;
+			}
+
+			udelay(1000);
+		}
+
+		printf("\nGot bootcode %08x: ", *ptr);
+		la = ptm1la + (*ptr & ADDRMASK);
+		sprintf(addr, "%08x", la);
+
+		switch (*ptr & ~ADDRMASK) {
+		case 0:
+			/*
+			 * Boot image via bootm
+			 */
+			printf("booting image at addr 0x%s ...\n", addr);
+			setenv("loadaddr", addr);
+			do_bootm(cmdtp, 0, 0, NULL);
+			break;
+
+		case 1:
+			/*
+			 * Boot image via "source" command
+			 */
+			printf("executing script at addr 0x%s ...\n", addr);
+			source(la, NULL);
+			break;
+
+		case 2:
+			/*
+			 * Call run_cmd
+			 */
+			printf("running command at addr 0x%s ...\n", addr);
+			run_command((char *)la, 0);
+			break;
+
+		default:
+			printf("unhandled boot method\n");
+			break;
+		}
+	}
+}
+
+U_BOOT_CMD(
+	loadpci,	1,	1,	do_loadpci,
+	"Wait for pci bootcmd and boot it",
+	""
+);
+
+#endif