README.amlogic

1 Debugrom Howto ...
	1.  files
			You can put below files into $(BOARDDIR)/firmware , $(SOCDIR)/firmware , $(CPUDIR)/common/firmware
			debugrom.c 
				debugrom main functions
			spl.c 
				second program loader main source .
 			ddr.c 
 				ddr initial source .
 			lowlevel_init.c
 				lowlevel initial source .
 			memtest.c  
 				memory test function 
 			relocate_init.c  
 				load u boot functions 
 			sdio.c  
 				load u boot from sd card functions
 			serial.c  
 				serial functions
 			spiwrite.c  
 				spi functions .
 			timer.c  
 				timer relative functions .
 			pinmux.c  
 				board relative pinmux 
 			pll.c  
 				pll setting 
 			romboot.c  
 				power on config setting parser functions.
 			timming.c  
 				timming settings .
 			uartpin.c  
 				uart settings .
 				
 	2 Compile 
 		You can compile Debugrom with  armcc by putting 
 			#define CONFIG_ENABLE_ARMCC_DEBUGROM 1 
 		into your config files
 		and install rvds in your compiler machine .
 		
 		
 		The advantage of armcc is the code size is very small . We can obtain more
 		powerful spl or debugrom .
 		
 		compile command :
 			gmake <board config>
 			gmake firmware // we can get firmware and spl only .
 			
 3 usage
 		if booting fail , or you booting the debugrom bin , you can enter debugrom mode
 		in this mode , you can test some basic hardware parameters .
 		another condition is you enter a key within 100ms .
 		
 		
		w:  write memory or register
      	w 80000000 1
    r:  read memory  or register
        r c1107d54
    q:  quit
		P:  init plls 
    S: show the addr of parameters addr .
    M: init memory and do some testing     
        
    B: setting start command .
        B "r c1107d54"
    s: save debugrom to spi flash .
    
2 Add make help 
	Every boad can put a Readme.mk please take a look at 
	board/amlogic/m2_socket_v1/Readme.mk 
	
	Then we can obtain make help command .
	it will show you the configs we can use .