bsp/qoriq: Add portal clear functions

c/src/lib/libbsp/powerpc/qoriq/Makefile.am

@@ -75,6 +75,7 @@ libbsp_a_SOURCES += \
 	startup/mmu.c \
 	startup/mmu-tlb1.S \
 	startup/mmu-config.c \
+	startup/portal.c \
 	startup/restart.S \
 	startup/bsppredriverhook.c \
 	startup/bspstart.c \

c/src/lib/libbsp/powerpc/qoriq/include/qoriq.h

@@ -527,6 +527,9 @@ extern volatile qoriq_ccsr qoriq;
 #if QORIQ_CHIP_IS_T_VARIANT(QORIQ_CHIP_VARIANT)
 extern uint8_t qoriq_bman_portal[2][16777216];
 extern uint8_t qoriq_qman_portal[2][16777216];
+
+void qoriq_clear_ce_portal(void *base, size_t size);
+void qoriq_clear_ci_portal(void *base, size_t size);
 #endif
 
 static inline void qoriq_reset_qman_and_bman(void)

c/src/lib/libbsp/powerpc/qoriq/startup/portal.c

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp/qoriq.h>
+
+#if QORIQ_CHIP_IS_T_VARIANT(QORIQ_CHIP_VARIANT)
+
+#include <libcpu/powerpc-utility.h>
+
+void qoriq_clear_ce_portal(void *base, size_t size)
+{
+  size_t offset;
+
+  for (offset = 0; offset < size; offset += 64) {
+    ppc_data_cache_block_clear_to_zero_2(base, offset);
+    ppc_data_cache_block_flush_2(base, offset);
+  }
+}
+
+void qoriq_clear_ci_portal(void *base, size_t size)
+{
+  uint32_t zero;
+  size_t offset;
+
+  zero = 0;
+
+  for (offset = 0; offset < size; offset += 4) {
+    ppc_write_word(zero, (char *) base + offset);
+  }
+}
+
+#endif