POST: OCM test added.
Added OCM test to POST layer. This version runs before all other tests
but doesn't yet interrupt post sequence on failure.
Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
diff --git a/include/post.h b/include/post.h
index ee07d2c..a108c7d 100644
--- a/include/post.h
+++ b/include/post.h
@@ -102,6 +102,7 @@
#define CFG_POST_BSPEC3 0x00040000
#define CFG_POST_BSPEC4 0x00080000
#define CFG_POST_BSPEC5 0x00100000
+#define CFG_POST_OCM 0x00200000
#endif /* CONFIG_POST */
diff --git a/post/cpu/ppc4xx/Makefile b/post/cpu/ppc4xx/Makefile
index f19dc5d..1cfd3bb 100644
--- a/post/cpu/ppc4xx/Makefile
+++ b/post/cpu/ppc4xx/Makefile
@@ -29,6 +29,7 @@
COBJS-$(CONFIG_HAS_POST) += denali_ecc.o
COBJS-$(CONFIG_HAS_POST) += ether.o
COBJS-$(CONFIG_HAS_POST) += fpu.o
+COBJS-$(CONFIG_HAS_POST) += ocm.o
COBJS-$(CONFIG_HAS_POST) += spr.o
COBJS-$(CONFIG_HAS_POST) += uart.o
COBJS-$(CONFIG_HAS_POST) += watchdog.o
diff --git a/post/cpu/ppc4xx/ocm.c b/post/cpu/ppc4xx/ocm.c
new file mode 100644
index 0000000..88aa93e
--- /dev/null
+++ b/post/cpu/ppc4xx/ocm.c
@@ -0,0 +1,89 @@
+/*
+ * (C) Copyright 2008 Ilya Yanok, EmCraft Systems, yanok@emcraft.com
+ *
+ * Developed for DENX Software Engineering GmbH
+ *
+ * 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>
+
+/*
+ * This test attempts to verify on-chip memory (OCM). Result is written
+ * to the scratch register and if test succeed it won't be run till next
+ * power on.
+ */
+
+#include <post.h>
+
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define OCM_TEST_PATTERN1 0x55555555
+#define OCM_TEST_PATTERN2 0xAAAAAAAA
+
+#if CONFIG_POST & CFG_POST_OCM
+
+static uint ocm_status_read(void)
+{
+ return in_be32((void *)CFG_OCM_STATUS_ADDR) &
+ CFG_OCM_STATUS_MASK;
+}
+
+static void ocm_status_write(uint value)
+{
+ out_be32((void *)CFG_OCM_STATUS_ADDR, value |
+ (in_be32((void *)CFG_OCM_STATUS_ADDR) &
+ ~CFG_OCM_STATUS_MASK));
+}
+
+static inline int ocm_test_word(uint value, uint *address)
+{
+ uint read_value;
+
+ *address = value;
+ sync();
+ read_value = *address;
+
+ return (read_value != value);
+}
+
+int ocm_post_test(int flags)
+{
+ uint old_value;
+ int ret = 0;
+ uint *address = (uint*)CFG_OCM_BASE;
+
+ if (ocm_status_read() == CFG_OCM_STATUS_OK)
+ return 0;
+ for (; address < (uint*)(CFG_OCM_BASE + CFG_OCM_SIZE); address++) {
+ old_value = *address;
+ if (ocm_test_word(OCM_TEST_PATTERN1, address) ||
+ ocm_test_word(OCM_TEST_PATTERN2, address)) {
+ ret = 1;
+ *address = old_value;
+ printf("OCM POST failed at %p!\n", address);
+ break;
+ }
+ *address = old_value;
+ }
+ ocm_status_write(ret ? CFG_OCM_STATUS_FAIL : CFG_OCM_STATUS_OK);
+ return ret;
+}
+#endif /* CONFIG_POST & CFG_POST_OCM */
diff --git a/post/tests.c b/post/tests.c
index 5db59d6..cdf4c86 100644
--- a/post/tests.c
+++ b/post/tests.c
@@ -29,6 +29,7 @@
#include <post.h>
+extern int ocm_post_test (int flags);
extern int cache_post_test (int flags);
extern int watchdog_post_test (int flags);
extern int i2c_post_test (int flags);
@@ -60,6 +61,18 @@
struct post_test post_list[] =
{
+#if CONFIG_POST & CFG_POST_OCM
+ {
+ "OCM test",
+ "ocm",
+ "This test checks on chip memory (OCM).",
+ POST_ROM | POST_ALWAYS | POST_PREREL | POST_CRITICAL,
+ &ocm_post_test,
+ NULL,
+ NULL,
+ CFG_POST_OCM
+ },
+#endif
#if CONFIG_POST & CFG_POST_CACHE
{
"Cache test",