From mboxrd@z Thu Jan  1 00:00:00 1970
From: Manuel Sahm <Manuel.Sahm@feig.de>
Date: Thu, 03 Sep 2009 10:31:08 +0200
Subject: [U-Boot] Interrupts in uboot with ARM AT91SAM9 (V2)
Message-ID: <4A9F9AD4.187F.00BC.1@feig.de>
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To: u-boot@lists.denx.de

Hello,
 
I have to use interrupts in UBoot 1.3.4 - how could I enable them ?
 
I have an AT91SAM9G20 - in ist header file I enable CONFIG_USE_IRQ und
uncomment the lines#ifdefc CONFIG_USE_IRQ #error .... #endif.
I inserted the lines:
#define CONFIG_STACKSIZE_IRQ (4*1024)
#define CONFIG_STACKSIZE_FIQ (4*1024)
 

In the file (/lib_amr/interrupts.c) I have to insert a function called
do_irq().
I inserted:
 
void do_irq(struct pt_regs* pt_regs)
{
 printf("interrupt request\n");
 show_regs(pt_regs);
 bad_mode();
}
 
When UBOOT starts all seems to be OK, but if I trigger my interrupt -
the system hangs....nothing is printed on screen anmd I can?t enter
anything in the prompt ?
 
Could you please help me.... ?
 
I have to trigger an interrupt if the Reset Pin is low to disable the
SDRAM Controller and perform a soft reset (It?s a bug in the
AT91SAM9G20).
 

Thanks a lot
Manuel