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/include/fsl_ddr_dimm_params.h

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2008-2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef DDR2_DIMM_PARAMS_H
+#define DDR2_DIMM_PARAMS_H
+
+#define EDC_DATA_PARITY	1
+#define EDC_ECC		2
+#define EDC_AC_PARITY	4
+
+/* Parameters for a DDR dimm computed from the SPD */
+typedef struct dimm_params_s {
+
+	/* DIMM organization parameters */
+	char mpart[19];		/* guaranteed null terminated */
+
+	unsigned int n_ranks;
+	unsigned long long rank_density;
+	unsigned long long capacity;
+	unsigned int data_width;
+	unsigned int primary_sdram_width;
+	unsigned int ec_sdram_width;
+	unsigned int registered_dimm;
+	unsigned int device_width;	/* x4, x8, x16 components */
+
+	/* SDRAM device parameters */
+	unsigned int n_row_addr;
+	unsigned int n_col_addr;
+	unsigned int edc_config;	/* 0 = none, 1 = parity, 2 = ECC */
+#ifdef CONFIG_SYS_FSL_DDR4
+	unsigned int bank_addr_bits;
+	unsigned int bank_group_bits;
+#else
+	unsigned int n_banks_per_sdram_device;
+#endif
+	unsigned int burst_lengths_bitmask;	/* BL=4 bit 2, BL=8 = bit 3 */
+	unsigned int row_density;
+
+	/* used in computing base address of DIMMs */
+	unsigned long long base_address;
+	/* mirrored DIMMs */
+	unsigned int mirrored_dimm;	/* only for ddr3 */
+
+	/* DIMM timing parameters */
+
+	int mtb_ps;	/* medium timebase ps */
+	int ftb_10th_ps; /* fine timebase, in 1/10 ps */
+	int taa_ps;	/* minimum CAS latency time */
+	int tfaw_ps;	/* four active window delay */
+
+	/*
+	 * SDRAM clock periods
+	 * The range for these are 1000-10000 so a short should be sufficient
+	 */
+	int tckmin_x_ps;
+	int tckmin_x_minus_1_ps;
+	int tckmin_x_minus_2_ps;
+	int tckmax_ps;
+
+	/* SPD-defined CAS latencies */
+	unsigned int caslat_x;
+	unsigned int caslat_x_minus_1;
+	unsigned int caslat_x_minus_2;
+
+	unsigned int caslat_lowest_derated;	/* Derated CAS latency */
+
+	/* basic timing parameters */
+	int trcd_ps;
+	int trp_ps;
+	int tras_ps;
+
+#ifdef CONFIG_SYS_FSL_DDR4
+	int trfc1_ps;
+	int trfc2_ps;
+	int trfc4_ps;
+	int trrds_ps;
+	int trrdl_ps;
+	int tccdl_ps;
+#else
+	int twr_ps;	/* maximum = 63750 ps */
+	int trfc_ps;	/* max = 255 ns + 256 ns + .75 ns
+				       = 511750 ps */
+	int trrd_ps;	/* maximum = 63750 ps */
+	int twtr_ps;	/* maximum = 63750 ps */
+	int trtp_ps;	/* byte 38, spd->trtp */
+#endif
+
+	int trc_ps;	/* maximum = 254 ns + .75 ns = 254750 ps */
+
+	int refresh_rate_ps;
+	int extended_op_srt;
+
+#if defined(CONFIG_SYS_FSL_DDR1) || defined(CONFIG_SYS_FSL_DDR2)
+	int tis_ps;	/* byte 32, spd->ca_setup */
+	int tih_ps;	/* byte 33, spd->ca_hold */
+	int tds_ps;	/* byte 34, spd->data_setup */
+	int tdh_ps;	/* byte 35, spd->data_hold */
+	int tdqsq_max_ps;	/* byte 44, spd->tdqsq */
+	int tqhs_ps;	/* byte 45, spd->tqhs */
+#endif
+
+	/* DDR3 RDIMM */
+	unsigned char rcw[16];	/* Register Control Word 0-15 */
+#ifdef CONFIG_SYS_FSL_DDR4
+	unsigned int dq_mapping[18];
+	unsigned int dq_mapping_ors;
+#endif
+} dimm_params_t;
+
+unsigned int ddr_compute_dimm_parameters(const unsigned int ctrl_num,
+					 const generic_spd_eeprom_t *spd,
+					 dimm_params_t *pdimm,
+					 unsigned int dimm_number);
+
+#endif