enable/disable interrupt

[Altera_Forum]

Hi, 

 I am porting a small kernel from avr to nios2 using a DE2 board. I have tried to modify the enable and disable interrupt macro like the follow:  # define DISABLE_INTERRUPTS {   asm volatile (   "addi r27, r27, -4 \n\t"   "stw r3, 0(r27) \n\t"   "addi r27, r27, -4 \n\t"   "stw r2, 0(r27) \n\t"   "movhi r2, 0xFF00 \n\t"   "subi r2, r2, 2 \n\t"   "rdctl r3, ctl0 \n\t"   "and r3, r3, r2 \n\t"   "wrctl ctl0, r3 \n\t"   "ldw r2, 0(r27) \n\t"   "addi r27, r27, 4 \n\t"   "ldw r3, 0(r27) \n\t"   "addi r27, r27, 4 " );  }  # define ENABLE_INTERRUPTS {   asm volatile (   "addi r27, r27, -4 \n\t"   "stw r3, 0(r27) \n\t"   "rdctl r3, ctl0 \n\t"   "ori r3, r3, 1 \n\t"   "wrctl ctl0, r3 \n\t"   "ldw r3, 0(r27) \n\t"   "addi r27, r27, 4 " );  }  When I try to debug using the hardware, the status register can not be correctly set. But when I use the instruction set simulator, it works fine. Can someone give me some hint.  with regards, Wei

[Altera_Forum]

Why don't you use altera's library irq enable and disable?

[Altera_Forum]

Hi aprado, 

  --- Quote Start ---  Why don't you use altera's library irq enable and disable?  --- Quote End ---   I have looked into the provided one. The alt_irq_enable_all need a context, which force me the modify other kernel code.

[Altera_Forum]

you can pass null as the context i think

[Altera_Forum]

--- Quote Start ---  you can pass null as the context i think  --- Quote End ---   I will try that.

[Altera_Forum]

Context is useful when calling irq enable all to restore interrupt conditions present before calling irq disable all!