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/mpc832xemds/pci.c

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+/*
+ * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * PCI Configuration space access support for MPC83xx PCI Bridge
+ */
+#include <asm/mmu.h>
+#include <asm/io.h>
+#include <common.h>
+#include <mpc83xx.h>
+#include <pci.h>
+#include <i2c.h>
+#include <asm/fsl_i2c.h>
+#include "../common/pq-mds-pib.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct pci_region pci1_regions[] = {
+	{
+		bus_start: CONFIG_SYS_PCI1_MEM_BASE,
+		phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
+		size: CONFIG_SYS_PCI1_MEM_SIZE,
+		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
+	},
+	{
+		bus_start: CONFIG_SYS_PCI1_IO_BASE,
+		phys_start: CONFIG_SYS_PCI1_IO_PHYS,
+		size: CONFIG_SYS_PCI1_IO_SIZE,
+		flags: PCI_REGION_IO
+	},
+	{
+		bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
+		phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
+		size: CONFIG_SYS_PCI1_MMIO_SIZE,
+		flags: PCI_REGION_MEM
+	},
+};
+
+#ifdef CONFIG_MPC83XX_PCI2
+static struct pci_region pci2_regions[] = {
+	{
+		bus_start: CONFIG_SYS_PCI2_MEM_BASE,
+		phys_start: CONFIG_SYS_PCI2_MEM_PHYS,
+		size: CONFIG_SYS_PCI2_MEM_SIZE,
+		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
+	},
+	{
+		bus_start: CONFIG_SYS_PCI2_IO_BASE,
+		phys_start: CONFIG_SYS_PCI2_IO_PHYS,
+		size: CONFIG_SYS_PCI2_IO_SIZE,
+		flags: PCI_REGION_IO
+	},
+	{
+		bus_start: CONFIG_SYS_PCI2_MMIO_BASE,
+		phys_start: CONFIG_SYS_PCI2_MMIO_PHYS,
+		size: CONFIG_SYS_PCI2_MMIO_SIZE,
+		flags: PCI_REGION_MEM
+	},
+};
+#endif
+
+void pci_init_board(void)
+#ifdef CONFIG_PCISLAVE
+{
+	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
+	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
+	volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[0];
+	struct pci_region *reg[] = { pci1_regions };
+
+	/* Configure PCI Local Access Windows */
+	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
+	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
+
+	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
+	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
+
+	mpc83xx_pci_init(1, reg);
+
+	/*
+	 * Configure PCI Inbound Translation Windows
+	 */
+	pci_ctrl[0].pitar0 = 0x0;
+	pci_ctrl[0].pibar0 = 0x0;
+	pci_ctrl[0].piwar0 = PIWAR_EN | PIWAR_RTT_SNOOP |
+	    PIWAR_WTT_SNOOP | PIWAR_IWS_4K;
+
+	pci_ctrl[0].pitar1 = 0x0;
+	pci_ctrl[0].pibar1 = 0x0;
+	pci_ctrl[0].piebar1 = 0x0;
+	pci_ctrl[0].piwar1 &= ~PIWAR_EN;
+
+	pci_ctrl[0].pitar2 = 0x0;
+	pci_ctrl[0].pibar2 = 0x0;
+	pci_ctrl[0].piebar2 = 0x0;
+	pci_ctrl[0].piwar2 &= ~PIWAR_EN;
+
+	/* Unlock the configuration bit */
+	mpc83xx_pcislave_unlock(0);
+	printf("PCI:   Agent mode enabled\n");
+}
+#else
+{
+	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
+	volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
+	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
+#ifndef CONFIG_MPC83XX_PCI2
+	struct pci_region *reg[] = { pci1_regions };
+#else
+	struct pci_region *reg[] = { pci1_regions, pci2_regions };
+#endif
+
+	/* initialize the PCA9555PW IO expander on the PIB board */
+	pib_init();
+
+#if defined(CONFIG_PCI_66M)
+	clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
+	printf("PCI clock is 66MHz\n");
+#elif defined(CONFIG_PCI_33M)
+	clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
+	    OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
+	printf("PCI clock is 33MHz\n");
+#else
+	clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
+	printf("PCI clock is 66MHz\n");
+#endif
+	udelay(2000);
+
+	/* Configure PCI Local Access Windows */
+	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
+	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
+
+	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
+	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_1M;
+
+	udelay(2000);
+
+#ifndef CONFIG_MPC83XX_PCI2
+	mpc83xx_pci_init(1, reg);
+#else
+	mpc83xx_pci_init(2, reg);
+#endif
+}
+#endif				/* CONFIG_PCISLAVE */