On Tue, Mar 17, 2015 at 06:42:06PM +0530, Naresh G. Solanki wrote:
I'm trying to port coreboot with seabios payload on Intel Atom E6xx based board,
The problem I'm facing is during malloc init, the board reboot & keeps on rebooting after displaying malloc init debug message.
I tried to track it & found that it might probably be due to dummy IDT loaded @seabios entry point (entry_elf)
Once it reboot I'm finding that breakpoints set are not working. Breakpoints are set through JTAG-XDP.
Can anyone give an idea to how to go about this issue.
SeaBIOS loads a dummy IDT when in 32bit mode, because the code is never supposed to raise an interrupt (interrupts and NMIs are always disabled when in 32bit mode). So, if you're seeing a fault with the IDT, it likely indicates something is causing a software fault.
If a fault is ocurring in malloc_init(), then I'd check that the memory between 0xc0000-0x100000 is fully read/writable. You could also try disabling CONFIG_MALLOC_UPPERMEMORY to see if that changes behavior. malloc_init() is also called right after self-relocation, so check that the memory map that coreboot provides is accurate. You could also try disabling CONFIG_RELOCATE_INIT to see if that changes the fault.