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/lib_powerpc/store.c

@@ -0,0 +1,219 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Store instructions:		stb(x)(u), sth(x)(u), stw(x)(u)
+ *
+ * All operations are performed on a 16-byte array. The array
+ * is 4-byte aligned. The base register points to offset 8.
+ * The immediate offset (index register) ranges in [-8 ... +7].
+ * The test cases are composed so that they do not
+ * cause alignment exceptions.
+ * The test contains a pre-built table describing all test cases.
+ * The table entry contains:
+ * the instruction opcode, the value of the index register and
+ * the value of the source register. After executing the
+ * instruction, the test verifies the contents of the array
+ * and the value of the base register (it must change for "store
+ * with update" instructions).
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_12w (ulong *code, ulong *op1, ulong op2, ulong op3);
+extern void cpu_post_exec_11w (ulong *code, ulong *op1, ulong op2);
+
+static struct cpu_post_store_s
+{
+    ulong cmd;
+    uint width;
+    int update;
+    int index;
+    ulong offset;
+    ulong value;
+} cpu_post_store_table[] =
+{
+    {
+	OP_STW,
+	4,
+	0,
+	0,
+	-4,
+	0xff00ff00
+    },
+    {
+	OP_STH,
+	2,
+	0,
+	0,
+	-2,
+	0xff00
+    },
+    {
+	OP_STB,
+	1,
+	0,
+	0,
+	-1,
+	0xff
+    },
+    {
+	OP_STWU,
+	4,
+	1,
+	0,
+	-4,
+	0xff00ff00
+    },
+    {
+	OP_STHU,
+	2,
+	1,
+	0,
+	-2,
+	0xff00
+    },
+    {
+	OP_STBU,
+	1,
+	1,
+	0,
+	-1,
+	0xff
+    },
+    {
+	OP_STWX,
+	4,
+	0,
+	1,
+	-4,
+	0xff00ff00
+    },
+    {
+	OP_STHX,
+	2,
+	0,
+	1,
+	-2,
+	0xff00
+    },
+    {
+	OP_STBX,
+	1,
+	0,
+	1,
+	-1,
+	0xff
+    },
+    {
+	OP_STWUX,
+	4,
+	1,
+	1,
+	-4,
+	0xff00ff00
+    },
+    {
+	OP_STHUX,
+	2,
+	1,
+	1,
+	-2,
+	0xff00
+    },
+    {
+	OP_STBUX,
+	1,
+	1,
+	1,
+	-1,
+	0xff
+    },
+};
+static unsigned int cpu_post_store_size = ARRAY_SIZE(cpu_post_store_table);
+
+int cpu_post_test_store (void)
+{
+    int ret = 0;
+    unsigned int i;
+    int flag = disable_interrupts();
+
+    for (i = 0; i < cpu_post_store_size && ret == 0; i++)
+    {
+	struct cpu_post_store_s *test = cpu_post_store_table + i;
+	uchar data[16] =
+	{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+	ulong base0 = (ulong) (data + 8);
+	ulong base = base0;
+
+	if (test->index)
+	{
+	    ulong code[] =
+	    {
+		ASM_12(test->cmd, 5, 3, 4),
+		ASM_BLR,
+	    };
+
+	    cpu_post_exec_12w (code, &base, test->offset, test->value);
+	}
+	else
+	{
+	    ulong code[] =
+	    {
+		ASM_11I(test->cmd, 4, 3, test->offset),
+		ASM_BLR,
+	    };
+
+	    cpu_post_exec_11w (code, &base, test->value);
+	}
+
+	if (ret == 0)
+	{
+	   if (test->update)
+	       ret = base == base0 + test->offset ? 0 : -1;
+	   else
+	       ret = base == base0 ? 0 : -1;
+	}
+
+	if (ret == 0)
+	{
+	    switch (test->width)
+	    {
+	    case 1:
+		ret = *(uchar *)(base0 + test->offset) == test->value ?
+		      0 : -1;
+		break;
+	    case 2:
+		ret = *(ushort *)(base0 + test->offset) == test->value ?
+		      0 : -1;
+		break;
+	    case 4:
+		ret = *(ulong *)(base0 + test->offset) == test->value ?
+		      0 : -1;
+		break;
+	    }
+	}
+
+	if (ret != 0)
+	{
+	    post_log ("Error at store test %d !\n", i);
+	}
+    }
+
+    if (flag)
+	enable_interrupts();
+
+    return ret;
+}
+
+#endif