MPC5744P bootloader jump application failed.

[my_souls]

Hello, my application writes to the flash via the boot loader, but the jump application fails;
The following is the relevant code, how can we successfully jump to the application?

The application program linker file was modified as follows:

MEMORY
{

    flash_rchw : org = 0x00FB0000,   len = 0x4

                cpu0_reset_vec : org = 0x00FB0004,   len = 0x4
                m_text : org = 0x1100000, len = 256K  
                m_data : org = 0x40000000,   len = 384K
                int_dram  : org = 0x50800000,   len = 64K    
}

The bootloader program linker file was modified as follows:

MEMORY
{

  flash_rchw : org = 0x00FA0000,   len = 0x4

                cpu0_reset_vec : org = 0x00FA0004,   len = 0x4
                m_text : org = 0x1000000, len = 256K  
                m_data : org = 0x40000000,   len = 384K
                int_dram  : org = 0x50800000,   len = 64K    

}

The bootloader program used the address jump code as follows:

asm("e_lis %r12,0x00FB");

asm("e_or2i %r12,0x0004");
asm("e_lwz %r0,0(%r12)");
asm("se_mtlr %r0");
asm("se_blrl");

Thank you!

[petervlna]

Hello,

this has been discussed over this forum many times.

You are not jumping to valid code, just to reset vector pointer.

use:

asm("e_lis %r12,0x00FB"); - use address with first instruction of code where you want to jump instead of 0x00FB0004

asm("e_or2i %r12,0x0004");
asm("e_lwz %r0,0(%r12)");
asm("se_mtlr %r0");
asm("se_blrl");

Your application starts at address stored at location 0x00FB0004 -> use address stored at 0x00FB0004 instead of using reset vector.

Reset vector is used only by HW (SSCM module) after reset for automatic jumps.

Peter

[qiaodeng]

Hi Peter,

     I also encountered the same problem, and I have changed the jump address to the location where my application starts, but it doesn't work. Could you please give me some advice? 

     Thanks in advance.

Best Regards,

Qiao

[petervlna]

Hi,

From the description of your issue is really not possible to help you.

Describe your problem, share code, or screenshots and I can try to help you.

Peter

[qiaodeng]

Hi Peter,

     My application locates at 0x01280000, 

MEMORY
{

flash_rchw : org = 0x00FA0000, len = 0x4
cpu0_reset_vec : org = 0x00FA0000+0x10, len = 0x4
cpu1_reset_vec : org = 0x00FA0000+0x14, len = 0x4

m_text : org = 0x01280000, len = 1024K
m_data : org = 0x40000000, len = 128K

In the bootloader, I wrote the following code to jump to the application, but during the jump it reports  "No source available for "IVOR1_Vector() at 0x1001010" .

asm("e_lis %r12,0x0128");
asm("e_or2i %r12,0x0000");
asm("e_lwz %r0,0(%r12)");
asm("mtlr %r0");
asm("se_blrl");

Qiao

[petervlna]

Hi,

Your asm code will end in IVOR1 (machine check) exception when you execute

asm("e_lwz %r0,0(%r12)");

use following code snippet to achive correct jump to address 0x1280000:

asm("e_lis %r12,0x0128");
asm("e_or2i %r12,0x0000");
asm("mtlr %r12");
asm("se_blrl");

I recommend you to read  core reference manual.

Peter

[qiaodeng]

Hi Peter,

     I tried it again, but it still failed. "No source available for "IVOR6_Vector() at 0x1001060" " occurred.  The chip I use is MPC5746R.

    Thanks again for your help.

Qiao

[petervlna]

Ok, I have done test on MPC5746R, even if it makes no sense as the core is the same as MPC5744P.

And then I execute se_blrl

And instruction pointer is on address 0x1280000.

So I do not understand why you still struggling here.

However I recommend you to read core reference manual in first place.

Peter

[qiaodeng]

Hi Peter,

      Before I execute se_blrl :

   And then I execute se_blrl,  what I executed is single step, but the target was running and did not stop.  I have to click the break and read the register:

The instruction pointer is on address 0x1001060.

Qiao

[petervlna]

Your first screenshot is correct.

Once you execute jump you will end up in address 0x1280000. As you require.

If you have any core on this address I cannot see from screenshots.

So everything works fine.

Peter

[qiaodeng]

Hi Peter,

    Thanks for your help. The problem has been solved. I checked the code at address 0x1280000, it was not flashed correctly. 

Qiao