Difference between revisions of "The IGEP X-loader"

From IGEP - ISEE Wiki

Jump to: navigation, search
Line 93: Line 93:
 
= BOOT<br>  =
 
= BOOT<br>  =
  
−
The IGEP X-Loader must reside in the microSD card or in the OneNand.<br>  
+
The IGEP X-Loader must reside in the microSD card or in the OneNand.<br>
  
−
== Low Level Initialization  ==
+
== MMC Boot ==
  
−
The OMAP Processor loads the XLoader directly from the mmc or the OneNand and copy the binary into the internal processor RAM (0x40200000) and jump to this place, this internal memory it's limited to 64K divided as: Interrupts, code, data and stack. Initialization code can be found using this link: [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=cpu/omap3/start.S;h=4cbf4379b8502ebfe0409b35e4aafba712234c34;hb=HEAD start.S]&nbsp;
+
=== Prepare the microsd card ===
−
<pre>&nbsp; 96 reset:
 
−
 
−
  97        /*
 
  
−
  98          * set the cpu to SVC32 mode
+
You can follow this howto about how [[ http://code.google.com/p/beagleboard/wiki/LinuxBootDiskFormat|prepare the microsd card]].
  
−
  99          */
 
  
−
100        mrs    r0,cpsr
 
  
−
101        bic    r0,r0,#0x1f
+
=== <br> 4 Settings &amp; Configuration:  ===
−
 
 
−
102        orr    r0,r0,#0xd3
 
−
 
 
−
103        msr    cpsr,r0
 
−
 
 
−
104
 
−
 
 
−
105        /* Copy vectors to mask ROM indirect addr */
 
−
 
 
−
106        adr    r0, _start              /* r0 &lt;- current position of code  */
 
−
 
 
−
107        add    r0, r0, #4                              /* skip reset vector                    */
 
−
 
 
−
108        mov    r2, #64                /* r2 &lt;- size to copy  */
 
−
 
 
−
109        add    r2, r0, r2              /* r2 &lt;- source end address        */
 
−
 
 
−
110        mov    r1, #SRAM_OFFSET0        /* build vect addr */
 
−
 
 
−
111        mov    r3, #SRAM_OFFSET1
 
−
 
 
−
112        add    r1, r1, r3
 
−
 
 
−
113        mov    r3, #SRAM_OFFSET2
 
−
 
 
−
114        add    r1, r1, r3
 
−
 
 
−
115 next:
 
−
 
 
−
116        ldmia  r0!, {r3-r10}          /* copy from source address [r0]    */
 
−
 
 
−
117        stmia  r1!, {r3-r10}          /* copy to  target address [r1]    */
 
−
 
 
−
118        cmp    r0, r2                  /* until source end address [r2]    */
 
−
 
 
−
119        bne    next                    /* loop until equal */
 
−
 
 
−
120
 
−
 
 
−
121        bl      cpy_clk_code            /* put dpll adjust code behind vectors */
 
−
 
 
−
122 
 
−
 
 
−
123        /* the mask ROM code should have PLL and others stable */
 
−
 
 
−
124        bl cpu_init_crit
 
−
 
 
−
&nbsp;125
 
−
 
 
−
126 relocate:                              /* relocate U-Boot to RAM          */
 
−
 
 
−
127        adr    r0, _start              /* r0 &lt;- current position of code  */
 
−
 
 
−
128        ldr    r1, _TEXT_BASE          /* test if we run from flash or RAM */
 
−
 
 
−
129        cmp r0, r1                      /* no need to relocate if XIP      */
 
−
 
 
−
130        beq stack_setup                /* skip txt cpy if XIP(SRAM, SDRAM) */
 
−
 
 
−
131
 
−
 
 
−
132        ldr    r2, _armboot_start
 
−
 
 
−
133        ldr    r3, _bss_start
 
−
 
 
−
134        sub    r2, r3, r2              /* r2 &lt;- size of armboot            */
 
−
 
 
−
135        add    r2, r0, r2              /* r2 &lt;- source end address        */
 
−
 
 
−
136
 
−
 
 
−
137 copy_loop:
 
−
 
 
−
138        ldmia  r0!, {r3-r10}          /* copy from source address [r0]    */
 
−
 
 
−
139        stmia  r1!, {r3-r10}          /* copy to  target address [r1]    */
 
−
 
 
−
140        cmp    r0, r2                  /* until source end addreee [r2]    */
 
−
 
 
−
141        ble    copy_loop
 
−
 
 
−
142
 
−
 
 
−
143        /* Set up the stack                                                */
 
−
 
 
−
144 stack_setup:
 
−
 
 
−
145        ldr    r0, _TEXT_BASE          /* upper 128 KiB: relocated uboot  */
 
−
 
 
−
146        sub    sp, r0, #128            /* leave 32 words for abort-stack  */
 
−
 
 
−
147        and    sp, sp, #~7            /* 8 byte alinged for (ldr/str)d    */
 
−
 
 
−
148
 
−
 
 
−
149        /* Clear BSS (if any).  Is below tx (watch load addr - need space)  */
 
−
 
 
−
150 clear_bss:
 
−
 
 
−
151        ldr    r0, _bss_start          /* find start of bss segment        */
 
−
 
 
−
152        ldr    r1, _bss_end            /* stop here                        */
 
−
 
 
−
153        mov    r2, #0x00000000        /* clear value                      */
 
−
 
 
−
154 clbss_l:
 
−
 
 
−
155        str    r2, [r0]                /* clear BSS location              */
 
−
 
 
−
156        cmp    r0, r1                  /* are we at the end yet            */
 
−
 
 
−
157        add    r0, r0, #4              /* increment clear index pointer    */
 
−
 
 
−
158        bne    clbss_l                /* keep clearing till at end        */
 
−
 
 
−
159
 
−
 
 
−
160        ldr    pc, _start_armboot      /* jump to C code                  */
 
−
 
 
−
161
 
−
 
 
−
162 _start_armboot: .word start_armboot
 
−
 
 
−
</pre>
 
−
It's important take a lool to the call assembly function cpu_init_crit (you can see the code below) this is resposable to call the board initialization defined in [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=board/igep0020/platform.S platform.S] file. Check the call to lowlevel_init:<br>
 
−
<pre> 175 cpu_init_crit:
 
−
176        /*
 
−
 
 
−
177          * Invalidate L1 I/D
 
−
 
 
−
178          */
 
−
 
 
−
179        mov    r0, #0                /* set up for MCR */
 
−
 
 
−
180        mcr    p15, 0, r0, c8, c7, 0  /* invalidate TLBs */
 
−
 
 
−
181        mcr    p15, 0, r0, c7, c5, 1  /* invalidate icache */
 
−
 
 
−
182
 
−
 
 
−
183        /* Invalide L2 cache (gp device call point)
 
−
 
 
−
184          * - warning, this may have issues on EMU/HS devices
 
−
 
 
−
185          * this call can corrupt r0-r5
 
−
 
 
−
186          */
 
−
 
 
−
187        mov r12, #0x1          @ set up to invalide L2
 
−
 
 
−
188 smi:    .word 0xE1600070        @ Call SMI monitor
 
−
 
 
−
189
 
−
 
 
−
190        /*
 
−
 
 
−
191          * disable MMU stuff and caches
 
−
 
 
−
192          */
 
−
 
 
−
193        mrc    p15, 0, r0, c1, c0, 0
 
−
 
 
−
194        bic    r0, r0, #0x00002000    @ clear bits 13 (--V-)
 
−
 
 
−
195        bic    r0, r0, #0x00000007    @ clear bits 2:0 (-CAM)
 
−
 
 
−
196        orr    r0, r0, #0x00000002    @ set bit 1 (--A-) Align
 
−
 
 
−
197 #ifndef CONFIG_ICACHE_OFF
 
−
 
 
−
198        orr    r0, r0, #0x00001800    @ set bit 11,12 (---I Z---) BTB,I-Cache
 
−
 
 
−
199 #endif
 
−
 
 
−
200        mcr    p15, 0, r0, c1, c0, 0
 
−
 
 
−
201
 
−
 
 
−
202        /*
 
−
 
 
−
203          * Jump to board specific initialization... The Mask ROM will have already initialized
 
−
 
 
−
204          * basic memory.  Go here to bump up clock rate and handle wake up conditions.
 
−
 
 
−
205          */
 
−
 
 
−
206        adr    r0, _start              /* r0 &lt;- current position of code  */
 
−
 
 
−
207        ldr    r1, _TEXT_BASE          /* test if we run from flash or RAM */
 
−
 
 
−
208        cmp    r0, r1                  /* pass on info about skipping some init portions */
 
−
 
 
−
209        moveq  r0,#0x1                /* flag to skip prcm and sdrc setup */
 
−
 
 
−
210        movne  r0,#0x0
 
−
 
 
−
211
 
−
 
 
−
212        mov    ip, lr          /* persevere link reg across call */
 
−
 
 
−
213        bl      lowlevel_init  /* go setup pll,mux,memory */
 
−
 
 
−
214        mov    lr, ip          /* restore link */
 
−
 
 
−
215        mov    pc, lr          /* back to my caller */
 
−
 
 
−
</pre>
 
−
Lowlevel_init it's responsable to set the stack settings and call the lowlevel board initialization called s_init "C" code defined in [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=board/igep0020/igep0020.c here]<br>
 
−
<pre> 171 .globl lowlevel_init
 
−
172 lowlevel_init:
 
−
 
 
−
173        ldr    sp,    SRAM_STACK
 
−
 
 
−
174        str    ip,    [sp]    /* stash old link register */
 
−
 
 
−
175        mov    ip,    lr      /* save link reg across call */
 
−
 
 
−
176        bl      s_init          /* go setup pll,mux,memory */
 
−
 
 
−
177        ldr    ip,    [sp]    /* restore save ip */
 
−
 
 
−
178        mov    lr,    ip      /* restore link reg */
 
−
 
 
−
179
 
−
 
 
−
180        /* back to arch calling code */
 
−
 
 
−
181        mov    pc,    lr
 
−
 
 
−
 
 
−
 
 
−
</pre>
 
−
At the end and after the s_init call the code jump to initial C function called [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=lib/board.c start_armboot] defined in the file lib/board.c.<br>
 
−
<pre>  65 init_fnc_t *init_sequence[] = {
 
−
  66        cpu_init,              /* basic cpu dependent setup */
 
−
  67        board_init,            /* basic board dependent setup */
 
−
  68 #ifdef CFG_NS16550_SERIAL
 
−
  69        serial_init,            /* serial communications setup */
 
−
  70 #endif
 
−
  71        print_info,
 
−
  72        nand_init,              /* board specific nand init */
 
−
  73 #ifdef CONFIG_MMC
 
−
  74        init_func_i2c,
 
−
  75 #endif
 
−
  76        NULL,
 
−
  77 };
 
−
  78
 
−
  79 void start_armboot (void)
 
−
  80 {
 
−
  81        init_fnc_t **init_fnc_ptr;
 
−
  82        int i, size;
 
−
  83        uchar *buf;
 
−
  84        int *first_instruction;
 
−
  85        block_dev_desc_t *dev_desc = NULL;
 
−
  86 #ifdef CONFIG_ONENAND
 
−
  87        unsigned int onenand_features;
 
−
  88 #endif
 
−
  89        /* Execute init_sequence */
 
−
  90        for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 
−
  91                if ((*init_fnc_ptr)() != 0) {
 
−
  92                        hang ();
 
−
  93                }
 
−
  94        }
 
−
  95
 
−
  96        /* Execute board specific misc init */
 
−
  97        misc_init_r();
 
−
  98
 
−
  99    /* Initialize OneNand */
 
−
100        onenand_init();
 
−
101
 
−
102    /* Initialize MMC */
 
−
103    mmc_init(1);
 
−
104
 
−
105    /* Load the Linux kernel */
 
−
106    /* boot_linux() should never return */
 
−
107    boot_linux();
 
−
108
 
−
109    hang();
 
−
110 }
 
−
</pre>
 
−
== C Execution Flow<br>  ==
 
−
 
 
−
=== s_init<br>  ===
 
−
 
 
−
Function: [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=board/igep0020/igep0020.c s_init]<br>
 
−
 
 
−
This function it's responsable to do the basic board (processor) initialization. It's called before the "C" generic initialization code.<br>
 
−
<pre> 874 /**********************************************************
 
−
875  * Routine: s_init
 
−
 
 
−
876  * Description: Does early system init of muxing and clocks.
 
−
 
 
−
877  * - Called at time when only stack is available.
 
−
 
 
−
878  **********************************************************/
 
−
 
 
−
879 void s_init(void)
 
−
 
 
−
880 {
 
−
 
 
−
881        watchdog_init();
 
−
 
 
−
882        try_unlock_memory();
 
−
 
 
−
883        set_muxconf_regs();
 
−
 
 
−
884        delay(100);
 
−
 
 
−
885        prcm_init();
 
−
 
 
−
886        per_clocks_enable();
 
−
 
 
−
887        gpmc_init ();
 
−
 
 
−
888        config_multichip_package();
 
−
 
 
−
889 }
 
−
 
 
−
 
 
−
 
 
−
</pre>
 
−
This function set the PLL clocks, MUX settings, GPMC configuration and memory configuration.
 
−
 
 
−
=== cpu_init<br>  ===
 
−
 
 
−
Function: [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=cpu/omap3/cpu.c cpu_init]<br>
 
−
 
 
−
This function it's the responsable to do the CPU generic initialization and it's the first function called. <br>
 
−
 
 
−
=== board_init<br>  ===
 
−
 
 
−
Function: [http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=board/igep0020/igep0020.c board_init]<br>
 
−
 
 
−
This function it's defined per board and it's the responsable to initialize the board.
 
−
 
 
−
Initialization GPMC for access to LAN9221 Ethernet controller and initialization of malloc &amp; free algorithms (from here all code can use malloc &amp; free calls).
 
−
<pre> 895 int board_init(void)
 
−
896 {
 
−
897    // Setup gpmc &lt;-&gt; Ethernet
 
−
898    setup_net_chip(is_cpu_family());
 
−
899    // Setup Malloc memory
 
−
900    mem_malloc_init(XLOADER_MALLOC_IPTR, XLOADER_MALLOC_SIZE);
 
−
901
 
−
902    return 0;
 
−
903 }
 
−
</pre>
 
−
=== serial_init<br>  ===
 
−
 
 
−
Function:&nbsp;[http://git.igep.es/?p=pub/scm/igep-x-loader.git;a=blob;f=drivers/serial.c serial_init]
 
−
 
 
−
This function initializes the serial driver.
 
−
 
 
−
 
 
−
 
 
−
=== <br> <br> 4 Settings &amp; Configuration:  ===
 
  
 
====== ================  ======
 
====== ================  ======

Revision as of 12:28, 3 March 2011

Summary

X-Loader, an initial program loader for Embedded boards based on OMAP processors.

Features and Limitations

Improvements & Modifications

  • Malloc/free functionality.
  • Mtd framework and onenand support, removed the old onenand drivers.
  • Jffs2 support using mtd & onenand support (Read Only).
  • Crc32 and zlib.
  • Jffs2 zlib compression support (Read Only).
  • Dual boot mmc & onenand with mmc highest priority.
  • Linux kernel boot directly (Support for 2.6.22 and highest version kernels)
  • Linux kernel supported images: vmlinuz, bzImage and zImage.
  • Support for loading Linux Ram disk (EXPERIMENTAL)
  • "ini" files parser.
  • The configuration resides in a plain txt (ini format file).
  • Support Windows & Linux formating ini files.
  • Boot from mmc, onenand, or mix with mmc highest priority.
  • Codeblocks project and compilation rules.
  • Support for gcc 4.5.1.

Limitations

  • The ini configuration file it's limited to max size: 16 KiB
  • Kernel Command line parameters it's limited to: 4 KiB
  • Malloc it's limited to 32 MiB.
  • Cannot write comments in lines with tag=value

TODO

  • Support for IGEP0030 - Family boards.
  • Support for other OMAP/DM/AM processor boards.
  • Remove compilation warnings.
  • Comments in tag lines

STATUS

  • Support IGEP0020 Revision B & C family boards.
  • Tested with IGEPv2 (DM3730@1Ghz and 512/512 MB Ram/Onenand)
  • Tested with IGEPv2 (AM3703@1Ghz and 512/512 MB Ram/Onenand)
  • Tested with IGEPv2 (OMAP3530@720Mhz and 512/512 MB Ram/Onenand)

Build Procedure

Build with Ubuntu Cross Compiler gcc 4.5.1

EnviromentUbuntu 10.10

Install the cross compiler if you not do it before.

apt-get install cpp-4.5-arm-linux-gnueabi g++-4.5-arm-linux-gnueabi

Setup the board settings

make igep0020-sdcard_config

Build

make

Sign the binary x-loader

You should execute contrib/signGP for sign the xloader. 

contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift

Build with IGEP SDK

Setup the Enviroment

source /usr/local/poky/eabi-glibc/environment-setup-arm-none-linux-gnueabi

Setup the board settings

make igep0020-sdcard_config

Build

make CROSS_COMPILE=arm-none-linux-gnueabi-

Sign the binary x-loader

You should execute contrib/signGP for sign the xloader. 

contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift

Build Native

Configure the board settings

make igep0020-sdcard_config

Edit the variable CFLAGS and add the option: -fno-stack-protector
CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -fno-stack-protector

Build

make CROSS_COMPILE=arm-none-linux-gnueabi-

Sign the binary x-loader

You should execute contrib/signGP for sign the xloader. 

contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift

BOOT

The IGEP X-Loader must reside in the microSD card or in the OneNand.

MMC Boot

Prepare the microsd card

You can follow this howto about how prepare the microsd card.



4 Settings & Configuration:

================

4.1 MMC Boot
------------
Get a new mmc and create two partitions, the first one must be fat (you can follow
this howto: http://code.google.com/p/beagleboard/wiki/LinuxBootDiskFormat)
In this first partition (boot partition) you should copy:

  • x-loader.bin.ift (you must rename this file to MLO) / This is a signed image using contrib/signGP tool
    * igep.ini
    * Your desired kernel image.

Don't use a uImage kernel format (from uboot), only kernel formats be supported.

Compilation Example:
$make ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- zImage modules

Read the kernel documentation about kernel images.

4.2 Setup igep.ini file
------------------------
# Note this format permits use the characters
# '#' and ';' as comment check file size restrictions

[kernel]
kaddress=0x80008000
;rdaddress=0x84000000
serial.low=00000001
serial.high=00000000
revision=0001
;kImageName=
;kRdImageName=

[kparams]
console=ttyS2,115200n8
;earlyprintk=serial,ttyS2,115200
mem=512M
boot_delay=0
;mpurate=800
;loglevel=7
omapfb.mode=dvi:1024x768MR-16@60
smsc911x.mac=0xb2,0xb0,0x14,0xb5,0xcd,0xde
;ubi.mtd=2
;root=ubi0:igep0020-rootfs
;rootfstype=ubifs
root=/dev/mmcblk0p2 rw rootwait

Tags Supported
---------------

[kernel] ----
* kaddress=0x80008000

Kernel copy address, you should use the same address used in kernel image
configuration. If you don't know what it means maybe it's better don't change it.

  • rdaddress=0x84000000
    Kernel RAM disk copy address.
    If you don't know what it means maybe it's better don't change it.
  • serial.low=00000001
    * serial.high=00000000
    Board serial Number, you can read this information using /proc/cpuinfo
  • revision=0001
    Board Revision ID, you can read this information using /proc/cpuinfo
  • kImageName=zImage
    Kernel file name, if you don't provide this tag it try to load these others:
    // DEFAULT IMAGES
    "zImage"
    "zimage"
    "vmlinuz"
    "bzImage"
    "bzimage"
  • kRdImageName=rdimage
    Kernel RAM Disk file, if you don't provide this tag it try to load these others:
    // DEFAULT IMAGES
    "initrd"

[kparams] ----
Kernel parameters, all these parameters are passed directly to the kernel using the
kernel command line.

kernel parameters documentation:
http://www.kernel.org/doc/Documentation/kernel-parameters.txt
http://www.kernel.org/pub/linux/kernel/people/gregkh/lkn/lkn_pdf/ch09.pdf

4.3 Boot Priority
-----------------
First try mmc and if it fails then try from OneNand.

Examples:
a) MLO (x-loader), igep.ini, zImage from MMC
If all it's present in the mmc it don't try to boot from Onenand.

b) MLO (x-loader) in MMC, igep.ini and zImage in Onenand.
If only MLO it's provided this one try to load the other information from
the Onenand.

4.4 OneNand Partition settings
-------------------------------
We suggest use minimum 3 partitions on the OneNand.

Creating 3 MTD partitions on "omap2-onenand":
0x000000000000-0x000000080000 : "X-Loader"
0x000000080000-0x000000c80000 : "Boot"
0x000000c80000-0x000020000000 : "File System"

4.4.1) Xloader partition
* Not fs formated (raw)
* Suggested size: 0x80000 (512 KiB)
* The xloader must be signed before copy it in the flash memory.

You should copy the x-loader in the firsts 4 blocks (first 512 KiB), this is not a
formated partition due the ROM not permits boot from there, you should use tools:
flash_eraseall and nandwrite for copy x-loader in the first blocks.

Suggested procedure:

nand_eraseall /dev/mtd0
nandwrite -p /dev/mtd0 <x-loader>

  • Sign x-loader
    You should execute contrib/signGP for sign the xloader that resides inside the flash memory.

contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift

Due the Onenand 512 MiB has two dies it's necessary split the x-loader and convert it to a 1 die binary.
This is a know OMAP/DM/AM OneNand/Nand boot limitation.

This is the procedure for create the x-loader OneNand binary:
You should execute: (You can use copy paste in your console)

split -b 2K x-load.bin.ift split-
for file in `ls split-a?`; do cat $file >> x-load-ddp.bin.ift; cat $file >> x-load-ddp.bin.ift; done

This last command generate a file named x-load-ddp.bin.ift this is the x-loader for copy it in the OneNand.

4.4.2 Boot Partition
--------------------
* fs used jffs2 zlib compressed filesystem.
* Suggested size: 0xC00000 (12 MiB)

First time creation:
a) Use the same procedure described in point 4.2.1. Copy your jffs2 compressed image in the
partition, it can be a empty file.

b) Erase the partition and mount it as jffs2 filesystem then you can copy with cp command.

Next Times:
Copy the files using cp command, or edit directly.

when kernel boots you can enable mount this partition over /boot directory for access all boot content.

4.4.3 Rootfs
------------
* fs (your prefered fs supported by linux, maybe a good choice it should be ubifs)
* Size, all or you can create more partitions if you wish ... emoticon


5 Build procedure
=================

5.1 Build with Ubuntu Cross Compiler gcc 4.5.1

  • This is tested with Ubuntu 10.10

a) Install the cross compiler:
apt-get install cpp-4.5-arm-linux-gnueabi g++-4.5-arm-linux-gnueabi

b) Configure the board
make igep0020-sdcard_config

c) Build
make

d) Sign x-loader
You should execute contrib/signGP for sign the xloader that resides inside the flash memory.
contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift


5.2 Build with IGEP SDK

a) Source the enviroment
source /usr/local/poky/eabi-glibc/environment-setup-arm-none-linux-gnueabi

b) Edit the file Makefile
Find the define:

And Set the variable as:
CROSS_COMPILE = arm-none-linux-gnueabi-

b) Configure the board
make igep0020-sdcard_config

c) build
make

d) Sign x-loader
You should execute contrib/signGP for sign the xloader that resides inside the flash memory.
contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift


5.3 Build Native

a) Configure the board
make igep0020-sdcard_config

b) Modify the config.mk file
Edit the variable CFLAGS and add the option: -fno-stack-protector

CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -fno-stack-protector

c) build
make CROSS_COMPILE=""

d) Sign x-loader
You should execute contrib/signGP for sign the xloader that resides inside the flash memory.
contrib/signGP x-load.bin
The signed x-loader it's named: x-load.bin.ift


6 Contribution & Support & Report Bugs
======================================
Contributions to this project be welcome and you can send your patches to support@iseebcn.com
or you can use the igep forum for it.
You can access to IGEP-x-Loader repository using our git at git.igep.es
IGEP IRC Channel: http://webchat.freenode.net/?channels=igep

Retrieved from "http://labs.isee.biz/index.php?title=The_IGEP_X-loader&oldid=1279"