海思开机画面

一、开机图像

方法： 文件系统划分部分空间用来存放图片数据，通过修改内核启动参数进行设置显示图片

1. 烧录固件

出厂固件为：1M fastboot、4M kernel、26M rtoofs
先分出1M用于存储图片数据，由于内存分配的单位必须是M为单位，所以需要根据图片大小向上取整

2. 设置环境变量

# 原始
setenv bootargs 'mem=128M console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=jffs2 rw mtdparts=hi_sfc:1M(boot),4M(kernel),25M(rootfs)'

setenv bootcmd 'sf probe 0;sf read 0x96000000 0x100000 0x400000;bootm 0x96000000'

saveenv

# logo可以显示，内核可以启动
setenv bootargs 'mem=128M console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=jffs2 rw mtdparts=hi_sfc:1M(boot),4M(kernel),25M(rootfs),1M(logo)'

setenv bootcmd 'sf probe 0;sf read 0x82000000 0x1E00000 0x100000;setenv jpeg_addr 0x82000000;setenv jpeg_size 0x100000;setenv jpeg_emar_buf 0x82200000;setenv vobuf 0x90000000;decjpg 0;startvo 0 32 10;startvl 0 0x90000000 1920 0 0 1920 1080;sf read 0x96000000 0x100000 0x400000;bootm 0x96000000'

saveenv
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二、开机进度条

1. 使用内核定时器实现显示进度条实现

systimer.c

/* linux/arch/arm/mach-hi3515_v100/systimer.c
*
* Copyright (c) 2006 Hisilicon Co., Ltd. 
*
* 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 
#include 
#include 
//#include 
#include 

#include 
#include 
#include 
//#include 
#include 

#include 
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#include 

#include 
//#include 
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//#include 
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//#include 
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//#include 

#include 
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#include 
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#include 
#include 


#include 
#include 

//#include 
//#include 
//
#define BOOTTIME (24)
#define PRO_WIDTH	960
#define COORDINATE_SYSTEM
//
struct timer_list s_timer;
void second_timer_handle(unsigned long);

static int count=0;
static void * pbase_logo=NULL;

#undef COORDINATE_SYSTEM
static int __init __system_timer_init(void)
{
	int i=0,j=0;
	//映射绘图地址
	pbase_logo=ioremap_nocache(0x90000000,1920*1080*2);
       
#if 0
	//绘制进度条边框
	for(i=480;i<1440;i++){
		*((unsigned short*)(pbase_logo)+1920*860+i)=0xe71c;
		*((unsigned short*)(pbase_logo)+1920*861+i)=0xe71c;
		*((unsigned short*)(pbase_logo)+1920*880+i)=0xe71c;
		*((unsigned short*)(pbase_logo)+1920*881+i)=0xe71c;
	}
	
	for(j=860;j<881;j++){
		*((unsigned short*)(pbase_logo)+480+j*1920)=0xe71c;
		*((unsigned short*)(pbase_logo)+481+j*1920)=0xe71c;
		*((unsigned short*)(pbase_logo)+1439+j*1920)=0xe71c;
		*((unsigned short*)(pbase_logo)+1440+j*1920)=0xe71c;
	}
#endif	
	//开启内核定时器，划线	
       	setup_timer(&s_timer, second_timer_handle, 0);
	s_timer.expires = jiffies + 20;
	add_timer(&s_timer);
	return 0;
}

static int draw_line(int process)
{
	int i,j;
	int n = 0;	
	for(i=2;i<process;i++)
	{
	   for(j=2;j<40;j++)
		*((unsigned char*)(pbase_logo)+1920*(850+j)+480+i)=0xff;
	}

	return 	(int)pbase_logo;
		
}
void second_timer_handle(unsigned long unused)
{
#if 1
	if(++count <= BOOTTIME*1)
	{
		if(pbase_logo==NULL)
		{
			printk("------------------logo--------123--------------\n");
		}
		else
		{
			if(count==(BOOTTIME))
			{
				draw_line(count*PRO_WIDTH/(BOOTTIME));
				mod_timer(&s_timer, jiffies + 500);
				
			}
			else
			{
				draw_line(count*PRO_WIDTH/(BOOTTIME));
				mod_timer(&s_timer, jiffies + 50);
			}

		}
	}
	else
	{
		del_timer(&s_timer);
		iounmap(pbase_logo);
	}
#endif
}
//---------------
module_init(__system_timer_init);
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2. 直接编译进kernel

1. 进入内核源码目录linux-4.9.y/arch/arm/mach-hibvt/ 下添加systimer.c
   
2. 修改Makefile， 添加obj-y += systimer.o