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/gdsys/gdppc440etx/gdppc440etx.c

@@ -0,0 +1,161 @@
+/*
+ * (C) Copyright 2008
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * Based on board/amcc/yosemite/yosemite.c
+ * (C) Copyright 2006-2007
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/ppc4xx.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/4xx_pci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* info for FLASH chips */
+extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
+
+int board_early_init_f(void)
+{
+	register uint reg;
+
+	/*
+	 * Setup the external bus controller/chip selects
+	 */
+	mfebc(EBC0_CFG, reg);
+	mtebc(EBC0_CFG, reg | 0x04000000);		/* Set ATC */
+
+	/*
+	 * Setup the GPIO pins
+	 */
+
+	/* setup Address lines for flash size 64Meg. */
+	out32(GPIO0_OSRL, in32(GPIO0_OSRL) | 0x54000000);
+	out32(GPIO0_TSRL, in32(GPIO0_TSRL) | 0x54000000);
+	out32(GPIO0_ISR1L, in32(GPIO0_ISR1L) | 0x54000000);
+
+	/* setup emac */
+	out32(GPIO0_TCR, in32(GPIO0_TCR) | 0xC080);
+	out32(GPIO0_TSRL, in32(GPIO0_TSRL) | 0x40);
+	out32(GPIO0_ISR1L, in32(GPIO0_ISR1L) | 0x55);
+	out32(GPIO0_OSRH, in32(GPIO0_OSRH) | 0x50004000);
+	out32(GPIO0_ISR1H, in32(GPIO0_ISR1H) | 0x00440000);
+
+	/* UART0 and UART1*/
+	out32(GPIO1_TCR, in32(GPIO1_TCR)     | 0x16000000);
+	out32(GPIO1_OSRL, in32(GPIO1_OSRL)   | 0x02180000);
+	out32(GPIO1_ISR1L, in32(GPIO1_ISR1L) | 0x00400000);
+	out32(GPIO1_ISR2L, in32(GPIO1_ISR2L) | 0x04010000);
+
+	/* disable boot-eeprom WP */
+	out32(GPIO0_OSRL, in32(GPIO0_OSRL) & ~0x00C00000);
+	out32(GPIO0_TSRL, in32(GPIO0_TSRL) & ~0x00C00000);
+	out32(GPIO0_ISR1L, in32(GPIO0_ISR1L) & ~0x00C00000);
+	out32(GPIO0_TCR, in32(GPIO0_TCR) | 0x08000000);
+	out32(GPIO0_OR, in32(GPIO0_OR) & ~0x08000000);
+
+	/* external interrupts IRQ0...3 */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) & ~0x00f00000);
+	out32(GPIO1_TSRL, in32(GPIO1_TSRL) & ~0x00005500);
+	out32(GPIO1_ISR1L, in32(GPIO1_ISR1L) | 0x00005500);
+
+
+	/*
+	 * Setup the interrupt controller polarities, triggers, etc.
+	 */
+	mtdcr(UIC0SR, 0xffffffff);	/* clear all */
+	mtdcr(UIC0ER, 0x00000000);	/* disable all */
+	mtdcr(UIC0CR, 0x00000009);	/* ATI & UIC1 crit are critical */
+	mtdcr(UIC0PR, 0xfffffe13);	/* per ref-board manual */
+	mtdcr(UIC0TR, 0x01c00008);	/* per ref-board manual */
+	mtdcr(UIC0VR, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr(UIC0SR, 0xffffffff);	/* clear all */
+
+	mtdcr(UIC1SR, 0xffffffff);	/* clear all */
+	mtdcr(UIC1ER, 0x00000000);	/* disable all */
+	mtdcr(UIC1CR, 0x00000000);	/* all non-critical */
+	mtdcr(UIC1PR, 0xffffe0ff);	/* per ref-board manual */
+	mtdcr(UIC1TR, 0x00ffc000);	/* per ref-board manual */
+	mtdcr(UIC1VR, 0x00000001);	/* int31 highest, base=0x000 */
+	mtdcr(UIC1SR, 0xffffffff);	/* clear all */
+
+	/*
+	 * Setup other serial configuration
+	 */
+	mfsdr(SDR0_PCI0, reg);
+	mtsdr(SDR0_PCI0, 0x80000000 | reg);	/* PCI arbiter enabled */
+	mtsdr(SDR0_PFC0, 0x00003e00);	/* Pin function */
+	mtsdr(SDR0_PFC1, 0x00048000);	/* Pin function: UART0 has 4 pins */
+
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	uint pbcr;
+	int size_val;
+	uint sz;
+
+	/* Re-do sizing to get full correct info */
+	mfebc(PB0CR, pbcr);
+
+	if (gd->bd->bi_flashsize > 0x08000000)
+		panic("Max. flash banksize is 128 MB!\n");
+
+	for (sz = gd->bd->bi_flashsize, size_val = 7;
+	    ((sz & 0x08000000) == 0) && (size_val > 0); --size_val)
+		sz <<= 1;
+
+	pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
+	mtebc(PB0CR, pbcr);
+
+	/* adjust flash start and offset */
+	gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
+	gd->bd->bi_flashoffset = 0;
+
+	/* Monitor protection ON by default */
+	(void)flash_protect(FLAG_PROTECT_SET,
+			    -CONFIG_SYS_MONITOR_LEN,
+			    0xffffffff,
+			    &flash_info[0]);
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	char buf[64];
+	int i = getenv_f("serial#", buf, sizeof(buf));
+
+	printf("Board: GDPPC440ETX - G&D PPC440EP/GR ETX-module");
+
+	if (i > 0) {
+		puts(", serial# ");
+		puts(buf);
+	}
+	putc('\n');
+
+	return 0;
+}
+
+/*
+ * Override weak pci_pre_init()
+ */
+#if defined(CONFIG_PCI)
+int pci_pre_init(struct pci_controller *hose)
+{
+	/* First call common code */
+	__pci_pre_init(hose);
+
+	/* enable 66 MHz ext. Clock */
+	out32(GPIO1_TCR, in32(GPIO1_TCR) | 0x00008000);
+	out32(GPIO1_OR, in32(GPIO1_OR) | 0x00008000);
+
+	return 1;
+}
+#endif	/* defined(CONFIG_PCI) */