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diff --git a/include/plat/arm/css/common/css_def.h b/include/plat/arm/css/common/css_def.h
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+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __CSS_DEF_H__
+#define __CSS_DEF_H__
+
+#include <arm_def.h>
+#include <tzc400.h>
+
+/*************************************************************************
+ * Definitions common to all ARM Compute SubSystems (CSS)
+ *************************************************************************/
+#define MHU_SECURE_BASE			ARM_SHARED_RAM_BASE
+#define MHU_SECURE_SIZE			ARM_SHARED_RAM_SIZE
+#define MHU_PAYLOAD_CACHED		0
+
+#define TRUSTED_MAILBOXES_BASE		MHU_SECURE_BASE
+#define TRUSTED_MAILBOX_SHIFT		4
+
+#define NSROM_BASE			0x1f000000
+#define NSROM_SIZE			0x00001000
+
+/* Following covers CSS Peripherals excluding NSROM and NSRAM  */
+#define CSS_DEVICE_BASE			0x20000000
+#define CSS_DEVICE_SIZE			0x0e000000
+#define MHU_BASE			0x2b1f0000
+
+#define NSRAM_BASE			0x2e000000
+#define NSRAM_SIZE			0x00008000
+
+/* The slave_bootsecure controls access to GPU, DMC and CS. */
+#define CSS_NIC400_SLAVE_BOOTSECURE	8
+
+/* Interrupt handling constants */
+#define CSS_IRQ_MHU			69
+#define CSS_IRQ_GPU_SMMU_0		71
+#define CSS_IRQ_GPU_SMMU_1		73
+#define CSS_IRQ_ETR_SMMU		75
+#define CSS_IRQ_TZC			80
+#define CSS_IRQ_TZ_WDOG			86
+
+/* SCP <=> AP boot configuration */
+#define SCP_BOOT_CFG_ADDR		0x04000080
+#define PRIMARY_CPU_SHIFT		8
+#define PRIMARY_CPU_MASK		0xf
+
+
+#define CSS_MAP_DEVICE			MAP_REGION_FLAT(		\
+						CSS_DEVICE_BASE,	\
+						CSS_DEVICE_SIZE,	\
+						MT_DEVICE | MT_RW | MT_SECURE)
+
+
+/*************************************************************************
+ * Required platform porting definitions common to all
+ * ARM Compute SubSystems (CSS)
+ ************************************************************************/
+
+/*
+ * Load address of BL3-0 in CSS platform ports
+ * BL3-0 is loaded to the same place as BL3-1.  Once BL3-0 is transferred to the
+ * SCP, it is discarded and BL3-1 is loaded over the top.
+ */
+#define BL30_BASE			BL31_BASE
+
+#define PLAT_ARM_SHARED_RAM_CACHED	MHU_PAYLOAD_CACHED
+
+/* Load address of Non-Secure Image for CSS platform ports */
+#define PLAT_ARM_NS_IMAGE_OFFSET	0xE0000000
+
+/* TZC related constants */
+#define PLAT_ARM_TZC_FILTERS		REG_ATTR_FILTER_BIT_ALL
+
+
+#endif /* __CSS_DEF_H__ */