ENGR00120393-1 imx: Add iram allocator functions

Add iram allocation functions using GENERIC_ALLOCATOR. The
allocation size is 4KB multiples to guarantee alignment.

Signed-off-by: Rob Herring <r.herring@freescale.com>

include/linux/iram_alloc.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#ifdef CONFIG_IRAM_ALLOC
+int __init iram_init(unsigned long base, unsigned long size);
+void *iram_alloc(unsigned int size, unsigned long *dma_addr);
+void iram_free(unsigned long dma_addr, unsigned int size);
+#else
+static inline int __init iram_init(unsigned long base, unsigned long size)
+{
+	return -ENOMEM;
+}
+static inline void *iram_alloc(unsigned int size, unsigned long *dma_addr)
+{
+	return NULL;
+}
+static inline void iram_free(unsigned long base, unsigned long size) {}
+#endif
+