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/powerpc/cpu/mpc512x/cpu.c

@@ -0,0 +1,200 @@
+/*
+ * (C) Copyright 2007-2010 DENX Software Engineering
+ * Copyright (C) 2004-2006 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * CPU specific code for the MPC512x family.
+ *
+ * Derived from the MPC83xx code.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <netdev.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+
+#if defined(CONFIG_OF_LIBFDT)
+#include <fdt_support.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int checkcpu (void)
+{
+	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+	ulong clock = gd->cpu_clk;
+	u32 pvr = get_pvr ();
+	u32 spridr = in_be32(&immr->sysconf.spridr);
+	char buf1[32], buf2[32];
+
+	puts ("CPU:   ");
+
+	switch (spridr & 0xffff0000) {
+	case SPR_5121E:
+		puts ("MPC5121e ");
+		break;
+	default:
+		printf ("Unknown part ID %08x ", spridr & 0xffff0000);
+	}
+	printf ("rev. %d.%d, Core ", SVR_MJREV (spridr), SVR_MNREV (spridr));
+
+	switch (pvr & 0xffff0000) {
+	case PVR_E300C4:
+		puts ("e300c4 ");
+		break;
+	default:
+		puts ("unknown ");
+	}
+	printf ("at %s MHz, CSB at %s MHz (RSR=0x%04lx)\n",
+		strmhz(buf1, clock),
+		strmhz(buf2, gd->arch.csb_clk),
+		gd->arch.reset_status & 0xffff);
+	return 0;
+}
+
+
+int
+do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+{
+	ulong msr;
+	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+
+	/* Interrupts and MMU off */
+	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
+
+	msr &= ~( MSR_EE | MSR_IR | MSR_DR);
+	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
+
+	/*
+	 * Enable Reset Control Reg - "RSTE" is the magic word that let us go
+	 */
+	out_be32(&immap->reset.rpr, 0x52535445);
+
+	/* Verify Reset Control Reg is enabled */
+	while (!(in_be32(&immap->reset.rcer) & RCER_CRE))
+		;
+
+	printf ("Resetting the board.\n");
+	udelay(200);
+
+	/* Perform reset */
+	out_be32(&immap->reset.rcr, RCR_SWHR);
+
+	/* Unreached... */
+	return 1;
+}
+
+
+/*
+ * Get timebase clock frequency (like cpu_clk in Hz)
+ */
+unsigned long get_tbclk (void)
+{
+	ulong tbclk;
+
+	tbclk = (gd->bus_clk + 3L) / 4L;
+
+	return tbclk;
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+	int re_enable = disable_interrupts ();
+
+	/* Reset watchdog */
+	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+	out_be32(&immr->wdt.swsrr, 0x556c);
+	out_be32(&immr->wdt.swsrr, 0xaa39);
+
+	if (re_enable)
+		enable_interrupts ();
+}
+#endif
+
+#ifdef CONFIG_OF_LIBFDT
+
+#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
+/*
+ * fdt setup for old device trees
+ * fix up
+ * 	cpu clocks
+ * 	soc clocks
+ * 	ethernet addresses
+ */
+static void old_ft_cpu_setup(void *blob, bd_t *bd)
+{
+	/*
+	 * avoid fixing up by path because that
+	 * produces scary error messages
+	 */
+	uchar enetaddr[6];
+
+	/*
+	 * old device trees have ethernet nodes with
+	 * device_type = "network"
+	 */
+	eth_getenv_enetaddr("ethaddr", enetaddr);
+	do_fixup_by_prop(blob, "device_type", "network", 8,
+		"local-mac-address", enetaddr, 6, 0);
+	do_fixup_by_prop(blob, "device_type", "network", 8,
+		"address", enetaddr, 6, 0);
+	/*
+	 * old device trees have soc nodes with
+	 * device_type = "soc"
+	 */
+	do_fixup_by_prop_u32(blob, "device_type", "soc", 4,
+		"bus-frequency", bd->bi_ipsfreq, 0);
+}
+#endif
+
+static void ft_clock_setup(void *blob, bd_t *bd)
+{
+	char *cpu_path = "/cpus/" OF_CPU;
+
+	/*
+	 * fixup cpu clocks using path
+	 */
+	do_fixup_by_path_u32(blob, cpu_path,
+		"timebase-frequency", OF_TBCLK, 1);
+	do_fixup_by_path_u32(blob, cpu_path,
+		"bus-frequency", bd->bi_busfreq, 1);
+	do_fixup_by_path_u32(blob, cpu_path,
+		"clock-frequency", bd->bi_intfreq, 1);
+	/*
+	 * fixup soc clocks using compatible
+	 */
+	do_fixup_by_compat_u32(blob, OF_SOC_COMPAT,
+		"bus-frequency", bd->bi_ipsfreq, 1);
+}
+
+void ft_cpu_setup(void *blob, bd_t *bd)
+{
+#ifdef CONFIG_OF_SUPPORT_OLD_DEVICE_TREES
+	old_ft_cpu_setup(blob, bd);
+#endif
+	ft_clock_setup(blob, bd);
+#ifdef CONFIG_HAS_ETH0
+	fdt_fixup_ethernet(blob);
+#endif
+	fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
+}
+#endif
+
+#ifdef CONFIG_MPC512x_FEC
+/* Default initializations for FEC controllers.  To override,
+ * create a board-specific function called:
+ * 	int board_eth_init(bd_t *bis)
+ */
+
+int cpu_eth_init(bd_t *bis)
+{
+	return mpc512x_fec_initialize(bis);
+}
+#endif