Hi:
I use OMAPL137, which contains ARM926 running Linux and C6747 running DSP/BIOS program. The DSP/BIOS program is very simple: It contains main, idle function and two timer function, After init some data in main function, it returns idle function and timer function will toggle LEDs as I expected.
I then modify the DSB/BIOS program by insert a "arm clock off" function in the main function, try to turn off the Linux so it will behavior like a single C6747 chip.
The "arm clock off function follows the description on the page : "section 10.6.2 ARM subsystem clock OFF", SPRUH92, "OMAPL137 Technical Reference Manual". all match the manual, I got ack from Linux. But after the "arm off" function, after main function return, the idle and timer no longer toggle LEDs.
It seems some resources or registers, timers are abnormal after arm off. Can some one tell me what/how to check to see why DSP/BIOS not working?