; -------------------------------------------------------------------------------- ; @Title: Linux Demo for TRACE32 OS Awareness for the OMAP H4 Board ; @Description: ; The example is generated for a TI OMAP H4 board using an ICD. ; It will NOT run on any other board, but may be used as a template ; for others. ; Linux is downloaded to the board via ICD. The target is initialized ; using the script omap_h4_int.cmm ; Attn for ETM: my board boots only, if started with ETM disconnected. ; Connect ETM after board started. ; Attn for demo: this demo uses 115200 baud for bootloader but 38400 ; baud for Linux console. You have to switch after Linux booted. ; @Keywords: awareness, OMAP24*, omaph4 ; @Author: DIE ; @Board: OMAP-H4 ; @Chip: OMAP2420 ; @Copyright: (C) 1989-2019 Lauterbach GmbH, licensed for use with TRACE32(R) only ; -------------------------------------------------------------------------------- ; $Id: omap_h4_linux.cmm 15223 2019-11-05 16:29:45Z bschroefel $ ; Starting Linux example with TRACE32: ; - Connect NULL modem cable to J9/serial connector on debug board ; - Open terminal: 115200 baud, 8/N/1, no(!) handshake ; - Start TRACE32 ; - Power on H4 board ; - TRACE32: do omap_h4_linux ; - Terminal (U-Boot): bootm 80300000 ; - login as root and start "hello" LOCAL &ka_path &awareness SCREEN.ON ; Debugger Reset WinPAGE.RESet AREA.RESet WinPOS 0. 26. 75. 8. 0. 0. W000 AREA.view PRINT "resetting..." SYStem.Down TASK.RESet Break.Delete MAP.RESet sYmbol.RESet TRANSlation.RESet ; Initializing Debugger PRINT "initializing..." SYStem.CPU OMAP2420 SYStem.Option DACR ON ; give Debugger global write permissions TrOnchip.Set DABORT OFF ; used by Linux for page miss! TrOnchip.Set PABORT OFF ; used by Linux for page miss! TrOnchip.Set UNDEF OFF ; used by Linux for detecting not existent units SYStem.Option MMUSPACES ON ; enable space ids to virtual addresses SYStem.Option ResBreak OFF SYStem.Option EnReset OFF SYStem.JtagClock RTCK 20MHz ; use adaptive clocking for most speed SETUP.IMASKASM ON ; lock interrupts while single stepping ; declare read-only memory MAP.BOnchip 0x00000000--0x401fffff SYStem.Up ; wait until reset is complete WAIT (Data.Long(SD:0x48022014)&1)!=0 ; disable watchdog timer Data.Set ASD:0x48022048 %Long 0x0000aaaa WAIT (Data.Long(ASD:0x48022034)&0x10)==0 Data.Set ASD:0x48022048 %Long 0x00005555 WAIT (Data.Long(ASD:0x48022034)&0x10)==0 ; Target Setup: initialize DRAM controller and peripherals PRINT "target setup..." DO omap_h4_init ; HACK: My board doesn't init correctly at first startup. ; Check memory access, if it fails repower target. Data.Set c:0x80000000 %Long 0x12345678 IF Data.Long(c:0x80000000)!=0x12345678 ( Data.dump 80000000 ; show faulty data PRINT "memory failure: please switch off/on target" WAIT !STATE.POWER() WAIT STATE.POWER() PRINT "restarting..." WAIT 1.s RUN linux ; restart this script ENDDO ) ; initialize ETM, if available IF etm() ( PRINT "initializing ETM" DO omap_h4_etm ) ; Load the Linux kernel ; If you are using a flashed kernel, or if you're loading ; your kernel via TFTP, use the boot monitor to do so. ; Here we download u-boot as bootloader, then we download ; the linux image and initrd into memory and let it boot ; with u-boot. ; Load das U-Boot and let it initialize the board PRINT "loading U-Boot..." Data.LOAD.Elf u-boot Go PRINT "booting U-Boot..." WAIT 2.s Break ; Use the next lines only to load the kernel into ; RAM using the debugger. PRINT "loading Linux image..." ; when loading and running vmlinux with ICD (bypassing bootloader): ( ; vmlinux starts physically at RAM start (=0x80000000) + 0x8000 ; (see arch/arm/kernel/head-armv.S) ; We have to adjust it from the virtual start address at the label ; "stext" from the System.map ("nm vmlinux | sort") ; i.e.: Data.LOAD.Elf vmlinux - ; use Turbo mode only, if target RAM is fast enough ;SYStem.Option TURBO ON ;Data.LOAD.Elf vmlinux 0x80008000-0xC0008000 /gnu /nosymbol ;SYStem.Option TURBO OFF ; Set PC on start address of image, if not started with bootloader ;Register.RESet ;Register.Set PC 0x80008000 ) ; when loading image with ICD, but running it with bootloader: ( ; load the compressed image to a place, where u-boot accepts it ; use Turbo mode only, if target RAM is fast enough SYStem.Option TURBO ON Data.LOAD.Binary uImage 0x80300000 /NosYmbol SYStem.Option TURBO OFF ) ; Loading initial ram disk (initrd) ; Use the next lines only, if you want to use an initrd, ; and if you want to download this with the debugger. ; Load ram file system image into ram disk ; use Turbo mode only, if target RAM is fast enough PRINT "loading ram disk" SYStem.Option TURBO ON Data.LOAD.Binary ramdisk.img.gz 0x80600000 /NoClear /NosYmbol SYStem.Option TURBO OFF ; Load the Linux kernel symbols into the debugger ; use /strippart and /path to map source paths, if necessary PRINT "loading Linux kernel symbols..." Data.LOAD.Elf vmlinux /gnu /NoCODE ; Open a Code Window -- we like to see something WinPOS 0. 0. 75. 20. List.auto SCREEN.display ; Declare the MMU format to the debugger ; - table format is "LINUX" ; - table base address is at label "swapper_pg_dir" ; - kernel address translation ; Map the virtual kernel symbols to physical addresses to give ; the debugger access to it before CPU MMU is initialized PRINT "initializing debugger MMU..." MMU.FORMAT LINUX swapper_pg_dir 0xc0000000--0xc3ffffff 0x80000000 TRNASlation.COMMON 0xc0000000--0xffffffff ; common area for kernel and processes TRNASlation.TableWalk ON ; debugger uses a table walk to decode virtual addresses TRNASlation.ON ; switch on debugger(!) address translation Go start_kernel /Onchip WAIT !STATE.RUN() ; Initialize Linux Awareness ; Note that the Linux awareness needs the kernel symbols to work PRINT "initializing Linux support..." ; check linux major version IF STRing.SCAN(Data.STRing(linux_banner), "Linux version 2.", 0)==0 ( &ka_path="~~/demo/arm/kernel/linux/linux-2.x" &awareness="linux.t32" ) ELSE ( &ka_path="~~/demo/arm/kernel/linux/linux-3.x" &awareness="linux3.t32" ) PRINT "initializing RTOS support..." TASK.CONFIG &ka_path/&awareness ; loads Linux awareness MENU.ReProgram &ka_path/linux ; loads Linux menu ; Group kernel area to be displayed with red bar GROUP.Create "kernel" 0xc0000000--0xffffffff /RED ; set data trace to selectively trace task switches only IF etm() Break.Set task.config(magic)++3 /TraceDATA ; Ok, we're done, let's start Linux Go ; if booting without bootloader: ;print "starting Linux..." ; if booting with u-boot: PRINT "execute 'bootm 80300000' in terminal" STOP ; -------------------------------------------------------------------------------- ; Application Debugging ; e.g. "hello" ; -------------------------------------------------------------------------------- ; activate autoloader for processes: TASK.sYmbol.Option AutoLoad Process PRINT "please log in and start 'hello'" ; script based ; using the script based application debugging ; gives more control over the single commands ; see file "app_debug.cmm" ;LOCAL &extdir ;&extdir=TASK.GETDIR() ;DO &extdir/app_debug hello ; process watch system ; the process watch system automates the actions ; for application debugging WinPOS 55. 25. 40. 4. TASK.Watch.View "hello" Go ENDDO