Linux_SDK_V0.9.5Linux_SDK_V0.9.5

1 files changed, 117 insertions, 0 deletions

diff --git a/post/lib_powerpc/cmpi.c b/post/lib_powerpc/cmpi.c
new file mode 100644
index 00000000..85a9b0ad
--- /dev/null
+++ b/post/lib_powerpc/cmpi.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ */
+
+#include <common.h>
+#include <irq_func.h>
+
+/*
+ * CPU test
+ * Integer compare instructions:	cmpwi, cmplwi
+ *
+ * To verify these instructions the test runs them with
+ * different combinations of operands, reads the condition
+ * register value and compares it with the expected one.
+ * The test contains a pre-built table
+ * containing the description of each test case: the instruction,
+ * the values of the operands, the condition field to save
+ * the result in and the expected result.
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1);
+
+static struct cpu_post_cmpi_s
+{
+    ulong cmd;
+    ulong op1;
+    ushort op2;
+    ulong cr;
+    ulong res;
+} cpu_post_cmpi_table[] =
+{
+    {
+	OP_CMPWI,
+	123,
+	123,
+	2,
+	0x02
+    },
+    {
+	OP_CMPWI,
+	123,
+	133,
+	3,
+	0x08
+    },
+    {
+	OP_CMPWI,
+	123,
+	-133,
+	4,
+	0x04
+    },
+    {
+	OP_CMPLWI,
+	123,
+	123,
+	2,
+	0x02
+    },
+    {
+	OP_CMPLWI,
+	123,
+	-133,
+	3,
+	0x08
+    },
+    {
+	OP_CMPLWI,
+	123,
+	113,
+	4,
+	0x04
+    },
+};
+static unsigned int cpu_post_cmpi_size = ARRAY_SIZE(cpu_post_cmpi_table);
+
+int cpu_post_test_cmpi (void)
+{
+    int ret = 0;
+    unsigned int i;
+    int flag = disable_interrupts();
+
+    for (i = 0; i < cpu_post_cmpi_size && ret == 0; i++)
+    {
+	struct cpu_post_cmpi_s *test = cpu_post_cmpi_table + i;
+	unsigned long code[] =
+	{
+	    ASM_1IC(test->cmd, test->cr, 3, test->op2),
+	    ASM_MFCR(3),
+	    ASM_BLR
+	};
+	ulong res;
+
+	cpu_post_exec_11 (code, & res, test->op1);
+
+	ret = ((res >> (28 - 4 * test->cr)) & 0xe) == test->res ? 0 : -1;
+
+	if (ret != 0)
+	{
+	    post_log ("Error at cmpi test %d !\n", i);
+	}
+    }
+
+    if (flag)
+	enable_interrupts();
+
+    return ret;
+}
+
+#endif