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+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#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).
+ */
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CFG_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 =
+ sizeof (cpu_post_store_table) / sizeof (struct cpu_post_store_s);
+
+int cpu_post_test_store (void)
+{
+ int ret = 0;
+ unsigned int i;
+
+ 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);
+ }
+ }
+
+ return ret;
+}
+
+#endif
+#endif