readme

bootloader源代码

Bootloader for Jasper DVD boards
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How does it works:
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The first stage bootloader start after reset from address 0, configure the caches and then load the 2nd stage in SDRAM (address 0x01300000). The second stage try to load a kernel image from a romfs in flash or from a bootable CD.

How to build it:
---------------

Just type "make", this should build a loader.bin file that you can load in ROM at address 0.

You con configure the bootloader behaviour by modifying the config.h file.

The build process first create two binary files loader0.bin and main.bin. loader0.bin is the first stage. main.bin is the second stage. The C entry point is in main.c.

Files:
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Makefile	: The makefile	
README		: This file
atapi.c		: Atapi driver
atapi.h 	: Atapi driver
bootdisc.c	: Load image from bootable disc
bootflash.c	: Load image from romfs
cloader.S	: Startup for second stage bootloader
config.h	: Configuration header 
const.h		: 
definition.h	:
errors.h	:
header.txt	:
inflate.c	: gunzip core
jasper.h	:
kunzip.c	: gunzip core
kunzip.h	: gunzip core
loader0.S	: first stage boot loader
main.c		: C entry point for second stage boot loader
mygzip.h	: gunzip core
qdt.c		: quasar dram test
qdt.h		: quasar dram test
specific.c	: Atapi driver (target specific io access)
specific.h	: Atapi driver (target specific io access)
uart.c		: Uart driver
uart.h		: Uart driver

Memory MAP for boot loader:
-------------------------

Boot loader binary image : 
0x0000 - 0x0200 (512 bytes) : loader0.bin (loader0.S)
0x0200 -                    : main.bin (cloader.S + *.c) (STAGE1_IMAGE_START)

Memory map : 
0x01000000 - 0x01008000 : unused
0x01008000 -            : kernel (KERNEL_LOAD_ADDRESS)
0x01300000 -            : main.bin is loaded to this address (STAGE1_LOAD_ADDRESS)
	.text
	.rodata
	.data
	.sbss
	.bss
	.stack : from the end of .bss allocate STACK_SIZE for stack