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u-boot-2016.11/arch/arm/cpu/armv7/hi3516dv300/hw_compressed/Makefile
u-boot-2016.11/arch/arm/cpu/armv7/hi3516dv300/hw_compressed/u-boot.lds
u-boot-2016.11/.reg
u-boot-2016.11/u-boot.bin

//.o文件，在Makefile中指定，按照链接脚本u-boot.lds用于生成u-boot-hi3516dv300.elf
START := start.o
COBJS := lowlevel_init_v300.o 
	init_registers.o 
	emmc_boot.o 
	uart.o 
	ddr_training_impl.o 
	ddr_training_ctl.o 
	ddr_training_boot.o 
	ddr_training_custom.o 
	ddr_training_console.o 
	startup.o 
	image_data.o 
	div0.o 
	reset.o

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//u-boot-2016.11/arch/arm/cpu/armv7/hi3516dv300/hw_compressed/image_data.S

.section .image,#alloc
.globl	input_data
/*gzip source addr must be 16 bytes aligned*/
.balign 16

input_data:
.incbin   "image_data.gzip"

.globl    input_data_end
input_data_end:



#define CONFIG_SYS_TEXT_BASE		0x80800000
#define GZIP_SIZE_OFFSET 0x4

const unsigned long IMAGE_ENTRY = (CONFIG_SYS_TEXT_BASE);

//u-boot-2016.11/arch/arm/cpu/armv7/hi3516dv300/hw_compressed/startup.c

void start_armboot(void)
{
	unsigned char *pdst_l32;
	unsigned int image_data_len;
	int pdst_len;
	int ret;
	int i;
	char *p;
	char *q;

	uart_early_init();
	uart_early_puts("rnUncompress ");

	/*use direct address mode*/
	hw_dec_type=0;
	
	/*初始化硬件解压缩模块*/
	hw_dec_init();

	/*将压缩镜像解压后存放的内存地址*/
	pdst_l32 = (unsigned char *)IMAGE_ENTRY;

	//整个被压缩镜像(image_data.gzip)的长度
	image_data_len = input_data_end - input_data;
	
	/*获取被压缩镜像本来的大小，也就是uboot.bin的大小*/
	p = (char *)&pdst_len;
	q = (char *)(input_data_end - GZIP_SIZE_OFFSET);
	for (i = 0; i < sizeof(int); i++) {
		p[i] = q[i];
	}

	//解压u-boot.bin到内存地址0x80800000
	ret = hw_dec_decompress(pdst_l32, &pdst_len, input_data, image_data_len, NULL);
	if (!ret)
		uart_early_puts("Ok!");
	else {
		uart_early_puts("Fail!");
		while(1);
	}
	
	/*反初始化硬件解压缩模块，节省性能，降低功耗*/
	hw_dec_uinit();

	//调用解压缩后的uboot代码，直接调用内存地址0x80800000，也就是uboot.bin镜像的入口
	void (*uboot)(void);
	uboot = (void (*))CONFIG_SYS_TEXT_BASE;
	invalidate_icache_all();
	uboot();
}