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/post/cpu/mpc8xx/spr.c

@@ -0,0 +1,132 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * SPR test
+ *
+ * The test checks the contents of Special Purpose Registers (SPR) listed
+ * in the spr_test_list array below.
+ * Each SPR value is read using mfspr instruction, some bits are masked
+ * according to the table and the resulting value is compared to the
+ * corresponding table value.
+ */
+
+#include <post.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_SPR
+
+static struct
+{
+    int number;
+    char * name;
+    unsigned long mask;
+    unsigned long value;
+} spr_test_list [] = {
+	/* Standard Special-Purpose Registers */
+
+	{1,	"XER",		0x00000000,	0x00000000},
+	{8,	"LR",		0x00000000,	0x00000000},
+	{9,	"CTR",		0x00000000,	0x00000000},
+	{18,	"DSISR",	0x00000000,	0x00000000},
+	{19,	"DAR",		0x00000000,	0x00000000},
+	{22,	"DEC",		0x00000000,	0x00000000},
+	{26,	"SRR0",		0x00000000,	0x00000000},
+	{27,	"SRR1",		0x00000000,	0x00000000},
+	{272,	"SPRG0",	0x00000000,	0x00000000},
+	{273,	"SPRG1",	0x00000000,	0x00000000},
+	{274,	"SPRG2",	0x00000000,	0x00000000},
+	{275,	"SPRG3",	0x00000000,	0x00000000},
+	{287,	"PVR",		0xFFFF0000,	0x00500000},
+
+	/* Additional Special-Purpose Registers */
+
+	{144,	"CMPA",		0x00000000,	0x00000000},
+	{145,	"CMPB",		0x00000000,	0x00000000},
+	{146,	"CMPC",		0x00000000,	0x00000000},
+	{147,	"CMPD",		0x00000000,	0x00000000},
+	{148,	"ICR",		0xFFFFFFFF,	0x00000000},
+	{149,	"DER",		0x00000000,	0x00000000},
+	{150,	"COUNTA",	0xFFFFFFFF,	0x00000000},
+	{151,	"COUNTB",	0xFFFFFFFF,	0x00000000},
+	{152,	"CMPE",		0x00000000,	0x00000000},
+	{153,	"CMPF",		0x00000000,	0x00000000},
+	{154,	"CMPG",		0x00000000,	0x00000000},
+	{155,	"CMPH",		0x00000000,	0x00000000},
+	{156,	"LCTRL1",	0xFFFFFFFF,	0x00000000},
+	{157,	"LCTRL2",	0xFFFFFFFF,	0x00000000},
+	{158,	"ICTRL",	0xFFFFFFFF,	0x00000007},
+	{159,	"BAR",		0x00000000,	0x00000000},
+	{630,	"DPDR",		0x00000000,	0x00000000},
+	{631,	"DPIR",		0x00000000,	0x00000000},
+	{638,	"IMMR",		0xFFFF0000,	CONFIG_SYS_IMMR  },
+	{560,	"IC_CST",	0x8E380000,	0x00000000},
+	{561,	"IC_ADR",	0x00000000,	0x00000000},
+	{562,	"IC_DAT",	0x00000000,	0x00000000},
+	{568,	"DC_CST",	0xEF380000,	0x00000000},
+	{569,	"DC_ADR",	0x00000000,	0x00000000},
+	{570,	"DC_DAT",	0x00000000,	0x00000000},
+	{784,	"MI_CTR",	0xFFFFFFFF,	0x00000000},
+	{786,	"MI_AP",	0x00000000,	0x00000000},
+	{787,	"MI_EPN",	0x00000000,	0x00000000},
+	{789,	"MI_TWC",	0xFFFFFE02,	0x00000000},
+	{790,	"MI_RPN",	0x00000000,	0x00000000},
+	{816,	"MI_DBCAM",	0x00000000,	0x00000000},
+	{817,	"MI_DBRAM0",	0x00000000,	0x00000000},
+	{818,	"MI_DBRAM1",	0x00000000,	0x00000000},
+	{792,	"MD_CTR",	0xFFFFFFFF,	0x04000000},
+	{793,	"M_CASID",	0xFFFFFFF0,	0x00000000},
+	{794,	"MD_AP",	0x00000000,	0x00000000},
+	{795,	"MD_EPN",	0x00000000,	0x00000000},
+	{796,	"M_TWB",	0x00000003,	0x00000000},
+	{797,	"MD_TWC",	0x00000003,	0x00000000},
+	{798,	"MD_RPN",	0x00000000,	0x00000000},
+	{799,	"M_TW",		0x00000000,	0x00000000},
+	{824,	"MD_DBCAM",	0x00000000,	0x00000000},
+	{825,	"MD_DBRAM0",	0x00000000,	0x00000000},
+	{826,	"MD_DBRAM1",	0x00000000,	0x00000000},
+};
+
+static int spr_test_list_size = ARRAY_SIZE(spr_test_list);
+
+int spr_post_test (int flags)
+{
+	int ret = 0;
+	int ic = icache_status ();
+	int i;
+
+	unsigned long code[] = {
+		0x7c6002a6,				/* mfspr r3,SPR */
+		0x4e800020				/* blr          */
+	};
+	unsigned long (*get_spr) (void) = (void *) code;
+
+	if (ic)
+		icache_disable ();
+
+	for (i = 0; i < spr_test_list_size; i++) {
+		int num = spr_test_list[i].number;
+
+		/* mfspr r3,num */
+		code[0] = 0x7c6002a6 | ((num & 0x1F) << 16) | ((num & 0x3E0) << 6);
+
+		if ((get_spr () & spr_test_list[i].mask) !=
+			(spr_test_list[i].value & spr_test_list[i].mask)) {
+			post_log ("The value of %s special register "
+				  "is incorrect: 0x%08X\n",
+					spr_test_list[i].name, get_spr ());
+			ret = -1;
+		}
+	}
+
+	if (ic)
+		icache_enable ();
+
+	return ret;
+}
+#endif /* CONFIG_POST & CONFIG_SYS_POST_SPR */