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/load.c

@@ -0,0 +1,239 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Load instructions:		lbz(x)(u), lhz(x)(u), lha(x)(u), lwz(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 array contents, the value of the index
+ * register and the expected value of the destination register.
+ * After executing the instruction, the test verifies the
+ * value of the destination register and the value of the base
+ * register (it must change for "load with update" instructions).
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_22w (ulong *code, ulong *op1, ulong op2, ulong *op3);
+extern void cpu_post_exec_21w (ulong *code, ulong *op1, ulong *op2);
+
+static struct cpu_post_load_s
+{
+    ulong cmd;
+    uint width;
+    int update;
+    int index;
+    ulong offset;
+} cpu_post_load_table[] =
+{
+    {
+	OP_LWZ,
+	4,
+	0,
+	0,
+	4
+    },
+    {
+	OP_LHA,
+	3,
+	0,
+	0,
+	2
+    },
+    {
+	OP_LHZ,
+	2,
+	0,
+	0,
+	2
+    },
+    {
+	OP_LBZ,
+	1,
+	0,
+	0,
+	1
+    },
+    {
+	OP_LWZU,
+	4,
+	1,
+	0,
+	4
+    },
+    {
+	OP_LHAU,
+	3,
+	1,
+	0,
+	2
+    },
+    {
+	OP_LHZU,
+	2,
+	1,
+	0,
+	2
+    },
+    {
+	OP_LBZU,
+	1,
+	1,
+	0,
+	1
+    },
+    {
+	OP_LWZX,
+	4,
+	0,
+	1,
+	4
+    },
+    {
+	OP_LHAX,
+	3,
+	0,
+	1,
+	2
+    },
+    {
+	OP_LHZX,
+	2,
+	0,
+	1,
+	2
+    },
+    {
+	OP_LBZX,
+	1,
+	0,
+	1,
+	1
+    },
+    {
+	OP_LWZUX,
+	4,
+	1,
+	1,
+	4
+    },
+    {
+	OP_LHAUX,
+	3,
+	1,
+	1,
+	2
+    },
+    {
+	OP_LHZUX,
+	2,
+	1,
+	1,
+	2
+    },
+    {
+	OP_LBZUX,
+	1,
+	1,
+	1,
+	1
+    },
+};
+static unsigned int cpu_post_load_size = ARRAY_SIZE(cpu_post_load_table);
+
+int cpu_post_test_load (void)
+{
+    int ret = 0;
+    unsigned int i;
+    int flag = disable_interrupts();
+
+    for (i = 0; i < cpu_post_load_size && ret == 0; i++)
+    {
+	struct cpu_post_load_s *test = cpu_post_load_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;
+	ulong value;
+
+	if (test->index)
+	{
+	    ulong code[] =
+	    {
+		ASM_12(test->cmd, 5, 3, 4),
+		ASM_BLR,
+	    };
+
+	    cpu_post_exec_22w (code, &base, test->offset, &value);
+	}
+	else
+	{
+	    ulong code[] =
+	    {
+		ASM_11I(test->cmd, 4, 3, test->offset),
+		ASM_BLR,
+	    };
+
+	    cpu_post_exec_21w (code, &base, &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) == value ?
+		      0 : -1;
+		break;
+	    case 2:
+		ret = *(ushort *)(base0 + test->offset) == value ?
+		      0 : -1;
+		break;
+	    case 3:
+		ret = *(short *)(base0 + test->offset) == value ?
+		      0 : -1;
+		break;
+	    case 4:
+		ret = *(ulong *)(base0 + test->offset) == value ?
+		      0 : -1;
+		break;
+	    }
+	}
+
+	if (ret != 0)
+	{
+	    post_log ("Error at load test %d !\n", i);
+	}
+    }
+
+    if (flag)
+	enable_interrupts();
+
+    return ret;
+}
+
+#endif