--- /dev/null
+/*******************************************************************************
+Copyright (C) Marvell International Ltd. and its affiliates
+
+This software file (the "File") is owned and distributed by Marvell
+International Ltd. and/or its affiliates ("Marvell") under the following
+alternative licensing terms. Once you have made an election to distribute the
+File under one of the following license alternatives, please (i) delete this
+introductory statement regarding license alternatives, (ii) delete the two
+license alternatives that you have not elected to use and (iii) preserve the
+Marvell copyright notice above.
+
+********************************************************************************
+Marvell Commercial License Option
+
+If you received this File from Marvell and you have entered into a commercial
+license agreement (a "Commercial License") with Marvell, the File is licensed
+to you under the terms of the applicable Commercial License.
+
+********************************************************************************
+Marvell GPL License Option
+
+If you received this File from Marvell, you may opt to use, redistribute and/or
+modify this File in accordance with the terms and conditions of the General
+Public License Version 2, June 1991 (the "GPL License"), a copy of which is
+available along with the File in the license.txt file or by writing to the Free
+Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
+on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
+
+THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
+WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
+DISCLAIMED. The GPL License provides additional details about this warranty
+disclaimer.
+********************************************************************************
+Marvell BSD License Option
+
+If you received this File from Marvell, you may opt to use, redistribute and/or
+modify this File under the following licensing terms.
+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 Marvell 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 OWNER 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.
+
+*******************************************************************************/
+
+#define MV_ASMLANGUAGE
+#include "mvOsAsm.h"
+#include "mvDeviceId.h"
+#include "mvCtrlEnvRegs.h"
+#include "mvCpuIfRegs.h"
+#include "mvCtrlEnvAsm.h"
+
+
+/*******************************************************************************
+* mvCpuIfPreInit - Make early initialization of CPU interface.
+*
+* DESCRIPTION:
+* The function will initialize the CPU interface parameters that must
+* be initialize before any BUS activity towards the DDR interface,
+* which means it must be executed from ROM. Because of that, the function
+* is implemented in assembly code.
+* The function configure the following CPU config register parameters:
+* 1) CPU2MbusLTickDrv
+* 2) CPU2MbusLTickSample.
+* NOTE: This function must be called AFTER the internal register
+* base is modified to INTER_REGS_BASE.
+*
+* INPUT:
+* None.
+*
+* OUTPUT:
+* None.
+*
+* RETURN:
+* None.
+*
+* r11 holds return function address.
+*******************************************************************************/
+#define MV88F6281_PCKG_OPT 2
+#define MV88F6192_PCKG_OPT 1
+#define MV88F6180_PCKG_OPT 0
+
+ .globl _mvCpuIfPreInit
+_mvCpuIfPreInit:
+
+ mov r11, LR /* Save link register */
+
+ /* Read device ID */
+ MV_CTRL_MODEL_GET_ASM(r4, r5);
+
+ /* goto calcConfigReg if device is 6281 */
+ ldr r5, =MV88F6281_PCKG_OPT
+ cmp r4, r5
+ beq calcConfigReg
+
+ /* goto calcConfigReg if device is 6192/6190 */
+ ldr r5, =MV88F6192_PCKG_OPT
+ cmp r4, r5
+ beq calcConfigReg
+
+ /* Else 6180 */
+ /* Get the "sample on reset" register */
+ MV_REG_READ_ASM (r4, r5, MPP_SAMPLE_AT_RESET)
+ ldr r5, =MSAR_CPUCLCK_MASK_6180
+ and r5, r4, r5
+ mov r5, r5, lsr #MSAR_CPUCLCK_OFFS_6180
+
+ ldr r4, =CPU_2_MBUSL_DDR_CLK_1x3
+ cmp r5, #CPU_2_DDR_CLK_1x3_1
+ beq setConfigReg
+
+ ldr r4, =CPU_2_MBUSL_DDR_CLK_1x4
+ cmp r5, #CPU_2_DDR_CLK_1x4_1
+ beq setConfigReg
+ b setConfigReg
+
+calcConfigReg:
+ /* Get the "sample on reset" register */
+ MV_REG_READ_ASM (r4, r5, MPP_SAMPLE_AT_RESET)
+ ldr r5, =MSAR_DDRCLCK_RTIO_MASK
+ and r5, r4, r5
+ mov r5, r5, lsr #MSAR_DDRCLCK_RTIO_OFFS
+
+ ldr r4, =CPU_2_MBUSL_DDR_CLK_1x3
+ cmp r5, #CPU_2_DDR_CLK_1x3
+ beq setConfigReg
+
+ ldr r4, =CPU_2_MBUSL_DDR_CLK_1x4
+ cmp r5, #CPU_2_DDR_CLK_1x4
+ beq setConfigReg
+
+ /* Else */
+ ldr r4, =0
+
+setConfigReg:
+ /* Read CPU Config register */
+ MV_REG_READ_ASM (r7, r5, CPU_CONFIG_REG)
+ ldr r5, =~(CCR_CPU_2_MBUSL_TICK_DRV_MASK | CCR_CPU_2_MBUSL_TICK_SMPL_MASK)
+ and r7, r7, r5 /* Clear register fields */
+ orr r7, r7, r4 /* Set the values according to the findings */
+ MV_REG_WRITE_ASM (r7, r5, CPU_CONFIG_REG)
+
+done:
+ mov PC, r11 /* r11 is saved link register */
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