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/fixed_sdram.c

@@ -0,0 +1,155 @@
+/*
+ * (C) Copyright 2007-2009 DENX Software Engineering
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/mpc512x.h>
+
+/*
+ * MDDRC Config Runtime Settings
+ */
+ddr512x_config_t default_mddrc_config = {
+	.ddr_sys_config   = CONFIG_SYS_MDDRC_SYS_CFG,
+	.ddr_time_config0 = CONFIG_SYS_MDDRC_TIME_CFG0,
+	.ddr_time_config1 = CONFIG_SYS_MDDRC_TIME_CFG1,
+	.ddr_time_config2 = CONFIG_SYS_MDDRC_TIME_CFG2,
+};
+
+u32 default_init_seq[] = {
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_PCHG_ALL,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_RFSH,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_RFSH,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_MICRON_INIT_DEV_OP,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_EM2,
+	CONFIG_SYS_DDRCMD_NOP,
+	CONFIG_SYS_DDRCMD_PCHG_ALL,
+	CONFIG_SYS_DDRCMD_EM2,
+	CONFIG_SYS_DDRCMD_EM3,
+	CONFIG_SYS_DDRCMD_EN_DLL,
+	CONFIG_SYS_MICRON_INIT_DEV_OP,
+	CONFIG_SYS_DDRCMD_PCHG_ALL,
+	CONFIG_SYS_DDRCMD_RFSH,
+	CONFIG_SYS_MICRON_INIT_DEV_OP,
+	CONFIG_SYS_DDRCMD_OCD_DEFAULT,
+	CONFIG_SYS_DDRCMD_PCHG_ALL,
+	CONFIG_SYS_DDRCMD_NOP
+};
+
+/*
+ * fixed sdram init:
+ * The board doesn't use memory modules that have serial presence
+ * detect or similar mechanism for discovery of the DRAM settings
+ */
+long int fixed_sdram(ddr512x_config_t *mddrc_config,
+			u32 *dram_init_seq, int seq_sz)
+{
+	volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
+	u32 msize = CONFIG_SYS_MAX_RAM_SIZE;
+	u32 msize_log2 = __ilog2(msize);
+	u32 i;
+
+	/* take default settings and init sequence if necessary */
+	if (mddrc_config == NULL)
+		mddrc_config = &default_mddrc_config;
+	if (dram_init_seq == NULL) {
+		dram_init_seq = default_init_seq;
+		seq_sz = ARRAY_SIZE(default_init_seq);
+	}
+
+	/* Initialize IO Control */
+	out_be32(&im->io_ctrl.io_control_mem, CONFIG_SYS_IOCTRL_MUX_DDR);
+
+	/* Initialize DDR Local Window */
+	out_be32(&im->sysconf.ddrlaw.bar, CONFIG_SYS_DDR_BASE & 0xFFFFF000);
+	out_be32(&im->sysconf.ddrlaw.ar, msize_log2 - 1);
+	sync_law(&im->sysconf.ddrlaw.ar);
+
+	/* DDR Enable */
+	/*
+	 * the "enable" combination: DRAM controller out of reset,
+	 * clock enabled, command mode -- BUT leave CKE low for now
+	 */
+	i = MDDRC_SYS_CFG_EN & ~MDDRC_SYS_CFG_CKE_MASK;
+	out_be32(&im->mddrc.ddr_sys_config, i);
+	/* maintain 200 microseconds of stable power and clock */
+	udelay(200);
+	/* apply a NOP, it shouldn't harm */
+	out_be32(&im->mddrc.ddr_command, CONFIG_SYS_DDRCMD_NOP);
+	/* now assert CKE (high) */
+	i |= MDDRC_SYS_CFG_CKE_MASK;
+	out_be32(&im->mddrc.ddr_sys_config, i);
+
+	/* Initialize DDR Priority Manager */
+	out_be32(&im->mddrc.prioman_config1, CONFIG_SYS_MDDRCGRP_PM_CFG1);
+	out_be32(&im->mddrc.prioman_config2, CONFIG_SYS_MDDRCGRP_PM_CFG2);
+	out_be32(&im->mddrc.hiprio_config, CONFIG_SYS_MDDRCGRP_HIPRIO_CFG);
+	out_be32(&im->mddrc.lut_table0_main_upper, CONFIG_SYS_MDDRCGRP_LUT0_MU);
+	out_be32(&im->mddrc.lut_table0_main_lower, CONFIG_SYS_MDDRCGRP_LUT0_ML);
+	out_be32(&im->mddrc.lut_table1_main_upper, CONFIG_SYS_MDDRCGRP_LUT1_MU);
+	out_be32(&im->mddrc.lut_table1_main_lower, CONFIG_SYS_MDDRCGRP_LUT1_ML);
+	out_be32(&im->mddrc.lut_table2_main_upper, CONFIG_SYS_MDDRCGRP_LUT2_MU);
+	out_be32(&im->mddrc.lut_table2_main_lower, CONFIG_SYS_MDDRCGRP_LUT2_ML);
+	out_be32(&im->mddrc.lut_table3_main_upper, CONFIG_SYS_MDDRCGRP_LUT3_MU);
+	out_be32(&im->mddrc.lut_table3_main_lower, CONFIG_SYS_MDDRCGRP_LUT3_ML);
+	out_be32(&im->mddrc.lut_table4_main_upper, CONFIG_SYS_MDDRCGRP_LUT4_MU);
+	out_be32(&im->mddrc.lut_table4_main_lower, CONFIG_SYS_MDDRCGRP_LUT4_ML);
+	out_be32(&im->mddrc.lut_table0_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT0_AU);
+	out_be32(&im->mddrc.lut_table0_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT0_AL);
+	out_be32(&im->mddrc.lut_table1_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT1_AU);
+	out_be32(&im->mddrc.lut_table1_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT1_AL);
+	out_be32(&im->mddrc.lut_table2_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT2_AU);
+	out_be32(&im->mddrc.lut_table2_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT2_AL);
+	out_be32(&im->mddrc.lut_table3_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT3_AU);
+	out_be32(&im->mddrc.lut_table3_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT3_AL);
+	out_be32(&im->mddrc.lut_table4_alternate_upper, CONFIG_SYS_MDDRCGRP_LUT4_AU);
+	out_be32(&im->mddrc.lut_table4_alternate_lower, CONFIG_SYS_MDDRCGRP_LUT4_AL);
+
+	/*
+	 * Initialize MDDRC
+	 *  put MDDRC in CMD mode and
+	 *  set the max time between refreshes to 0 during init process
+	 */
+	out_be32(&im->mddrc.ddr_sys_config,
+		mddrc_config->ddr_sys_config | MDDRC_SYS_CFG_CMD_MASK);
+	out_be32(&im->mddrc.ddr_time_config0,
+		mddrc_config->ddr_time_config0 & MDDRC_REFRESH_ZERO_MASK);
+	out_be32(&im->mddrc.ddr_time_config1,
+		mddrc_config->ddr_time_config1);
+	out_be32(&im->mddrc.ddr_time_config2,
+		mddrc_config->ddr_time_config2);
+
+	/* Initialize DDR with either default or supplied init sequence */
+	for (i = 0; i < seq_sz; i++)
+		out_be32(&im->mddrc.ddr_command, dram_init_seq[i]);
+
+	/* Start MDDRC */
+	out_be32(&im->mddrc.ddr_time_config0, mddrc_config->ddr_time_config0);
+	out_be32(&im->mddrc.ddr_sys_config, mddrc_config->ddr_sys_config);
+
+	/* Allow for the DLL to startup before accessing data */
+	udelay(10);
+
+	msize = get_ram_size(CONFIG_SYS_DDR_BASE, CONFIG_SYS_MAX_RAM_SIZE);
+	/* Fix DDR Local Window for new size */
+	out_be32(&im->sysconf.ddrlaw.ar, __ilog2(msize) - 1);
+	sync_law(&im->sysconf.ddrlaw.ar);
+
+	return msize;
+}