Re: New Pi Quad Core

2015-03-05 Thread Alan Cudmore
RPI 2 should not be that bad: I changed the peripheral register base in raspberrypi.h, changed the compilation arch flags, commented out the mmu init call, and some samples seem to work. I ran ticker and paranoia Alan On Thu, Mar 5, 2015 at 7:42 PM, wrote: > I think this will be possible. I

Re: New Pi Quad Core

2015-03-05 Thread alan.cudmore
I think this will be possible. I just tried a few bare metal assembly demos on the Pi A+ and Pi2 and it looks like even without the published CPU datasheet, they have things figured out. For example: An assembly SMP NEON fractal demo: https://github.com/PeterLemon/RaspberryPi/tree/master/SMP/N

New Pi Quad Core

2015-03-05 Thread Joel Sherrill
Hi I am going to go back on what I said earlier. The online discussion seems to indicate that the BCM2836 has the same peripherals as the BCM2835 on the previous Pi Models. But they are at physical address 0x3F00 rather than the 0x2000. The CPU core is a different ARM level. Since people