H Alexey. Thanks.
I need some help in getting a small code that exercises interrupts. For several years I wrote FW for ARC based platforms (ARC4 & ARC6), but it seems I forgot some of the things related to interrupts. I compiled FreeRTOS demo from embARC, however I could not find interrupt vectors there, I assume their board has ROM. So, if you can help me with such a code, it would be great. thanks, Michael On Fri, Sep 16, 2016 at 6:01 PM, Alexey Brodkin <alexey.brod...@synopsys.com > wrote: > Hi Michael, > > On Fri, 2016-09-09 at 01:31 +0300, Michael Rolnik wrote: > > This series of patches adds ARC target to QEMU. It indends to support > > - ARCtangent-A5 processor > > - ARC 600 processor > > - ARC 700 processor > > > > All instructions except ASLS are implemented. Not fully tested yet. > > However I was able to execute correctly recursive fibonacci calculation. > > Reset vector is assumed to be some hardcoded value which worked for my > test. > > I am planning to get FreeRTOS for ARC, once I get it, I will able to > verify > > and complete interrupt support. > > That's both very unexpected and cool! > > I tried your patches on top of current QEMU git master and it: > a) Builds for ARC > b) Very simple code really works! > > I was able to single-step with GDB through program as simple as: > --------------------->8--------------------- > .global _start > _start: > mov r0, 1 > mov r1, 2 > mov r1, r0 > --------------------->8--------------------- > > That's what I saw in GDB: > --------------------->8--------------------- > (gdb) disassemble > Dump of assembler code for function _start: > => 0x00000100 <+0>: mov r0,0x1 > 0x00000104 <+4>: mov r1,0x2 > 0x00000108 <+8>: mov r1,r0 > End of assembler dump. > (gdb) p $r0 > $1 = 0 > (gdb) stepi > 0x00000104 in _start () > (gdb) p $r0 > $2 = 1 > (gdb) stepi > 0x00000108 in _start () > (gdb) p $r1 > $3 = 2 > (gdb) stepi > 0x0000010c in ?? () > (gdb) p $r1 > $4 = 1 > --------------------->8--------------------- > > So again this is very promising even though a lot is essentially missing > from > this very first implementation. > > Anyways IMHO it would be good to have these patches accepted so people may > start > playing with that stuff adding missing things one by one. > > Let me know if you need any help from my side. > > Regards, > Alexey -- Best Regards, Michael Rolnik