/*
 * (C) Copyright 2007-2013
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Jerry Wang <wangflord@allwinnertech.com>
 *
 * 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>
#include <private_uboot.h>
extern char uboot_hash_value[64];
#pragma pack(1)
struct spare_boot_head_t  uboot_spare_head = 
{
    {
        /* jump_instruction */          
        ( 0xEA000000 | ( ( ( sizeof( struct spare_boot_head_t ) + sizeof(uboot_hash_value) + sizeof( int ) - 1 ) / sizeof( int ) - 2 ) & 0x00FFFFFF ) ),
        UBOOT_MAGIC,
        STAMP_VALUE,
        ALIGN_SIZE,
        0,
        0,
        UBOOT_VERSION,
        UBOOT_PLATFORM,
        {CONFIG_SYS_TEXT_BASE}
    },
    {
        { 0 },		//dram para
        1008,			//run core clock
        1200,			//run core vol
        0,			//uart port
        {             //uart gpio
            {0}, {0}
        },
        0,			//twi port
        {             //twi gpio
        	{0}, {0}
        },
        0,			//work mode
        0,			//storage mode
        { {0} },		//nand gpio
        { 0 },		//nand spare data
        { {0} },		//sdcard gpio
        { 0 }, 		//sdcard spare data
        0,                          //secure os 
		0,                          //monitor
		{0},                        // res
        UBOOT_START_SECTOR_IN_SDMMC, //OTA flag
        0,                           //dtb offset
        0,                           //boot_package_size
		0,							//dram_scan_size
        { 0 }			//reserved data
    }
};

#pragma pack()
/*******************************************************************************
*
*                  关于Boot_file_head中的jump_instruction字段
*
*  jump_instruction字段存放的是一条跳转指令：( B  BACK_OF_Boot_file_head )，此跳
*转指令被执行后，程序将跳转到Boot_file_head后面第一条指令。
*
*  ARM指令中的B指令编码如下：
*          +--------+---------+------------------------------+
*          | 31--28 | 27--24  |            23--0             |
*          +--------+---------+------------------------------+
*          |  cond  | 1 0 1 0 |        signed_immed_24       |
*          +--------+---------+------------------------------+
*  《ARM Architecture Reference Manual》对于此指令有如下解释：
*  Syntax :
*  B{<cond>}  <target_address>
*    <cond>    Is the condition under which the instruction is executed. If the
*              <cond> is ommitted, the AL(always,its code is 0b1110 )is used.
*    <target_address>
*              Specified the address to branch to. The branch target address is
*              calculated by:
*              1.  Sign-extending the 24-bit signed(wro's complement)immediate
*                  to 32 bits.
*              2.  Shifting the result left two bits.
*              3.  Adding to the contents of the PC, which contains the address
*                  of the branch instruction plus 8.
*
*  由此可知，此指令编码的最高8位为：0b11101010，低24位根据Boot_file_head的大小动
*态生成，所以指令的组装过程如下：
*  ( sizeof( boot_file_head_t ) + sizeof( int ) - 1 ) / sizeof( int )    求出文件头
*                                              占用的“字”的个数
*  - 2                                         减去PC预取的指令条数
*  & 0x00FFFFFF                                求出signed-immed-24
*  | 0xEA000000                                组装成B指令
*
*******************************************************************************/