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/freescale/common/cadmus.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2004, 2011 Freescale Semiconductor.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+
+#include <common.h>
+
+
+/*
+ * CADMUS Board System Registers
+ */
+#ifndef CONFIG_SYS_CADMUS_BASE_REG
+#define CONFIG_SYS_CADMUS_BASE_REG	(CADMUS_BASE_ADDR + 0x4000)
+#endif
+
+typedef struct cadmus_reg {
+    u_char cm_ver;		/* Board version */
+    u_char cm_csr;		/* General control/status */
+    u_char cm_rst;		/* Reset control */
+    u_char cm_hsclk;		/* High speed clock */
+    u_char cm_hsxclk;		/* High speed clock extended */
+    u_char cm_led;		/* LED data */
+    u_char cm_pci;		/* PCI control/status */
+    u_char cm_dma;		/* DMA control */
+    u_char cm_reserved[248];	/* Total 256 bytes */
+} cadmus_reg_t;
+
+
+unsigned int
+get_board_version(void)
+{
+	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
+
+	return cadmus->cm_ver;
+}
+
+
+unsigned long
+get_clock_freq(void)
+{
+	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
+
+	uint pci1_speed = (cadmus->cm_pci >> 2) & 0x3; /* PSPEED in [4:5] */
+
+	if (pci1_speed == 0) {
+		return 33333333;
+	} else if (pci1_speed == 1) {
+		return 66666666;
+	} else {
+		/* Really, unknown. Be safe? */
+		return 33333333;
+	}
+}
+
+
+unsigned int
+get_pci_slot(void)
+{
+	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
+
+	/*
+	 * PCI slot in USER bits CSR[6:7] by convention.
+	 */
+	return ((cadmus->cm_csr >> 6) & 0x3) + 1;
+}
+
+
+unsigned int
+get_pci_dual(void)
+{
+	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CONFIG_SYS_CADMUS_BASE_REG;
+
+	/*
+	 * PCI DUAL in CM_PCI[3]
+	 */
+	return cadmus->cm_pci & 0x10;
+}