If you are overriding the RTEMS memory map, be sure to map OCM as Device memory. The ROM bootloader accesses it with non-cacheable attributes.
On Thu, Apr 2, 2020 at 4:19 PM Chris Johns <chr...@rtems.org> wrote: > On 2020-04-02 18:45, Fernando Domínguez Pousa wrote: > > Hi again, > > > > Finally I could continue my tests on zc706 and the second processor > start. > > > > I could add two breakpoints one at _CPU_SMP_Start_processor (0x0041e7b0) > and other at _Per_CPU_State_wait_for_non_initial_state (0x0041e7d4) at the > end of the function _CPU_SMP_Start_processor. Execution stops and > continues in both breakpoints, but I still need to need to start the second > processor from xsdb. I attach you a capture of the objdump done at the end > of the mail. > > The way the process is started is by a write to an address > (0xfffffff0UL). The second core is parked in code in the ROM monitor > that is in zynq and when kicked it jumps to the address held in the > special location. At power up the address points to a ROM loop that just > loops and power downs. I wonder if xsdb is doing something with the core > that is effecting what happens? > > >> Yes I believe so. I tested the m2003 version. > > Can you share me the compilation flags you use for your tests > executables? > > I use the ones RTEMS uses to build the BSP with some changes in the > warning flags. You need to do this to maintain the ABI ... > > > https://docs.rtems.org/branches/master/user/exe/executables.html#machine-flags-and-abi > > > And sorry for this answer, but where can I find the m2003 version? Is it > a git tag, branch.. ? I don't see anything similar on GitHub repos. > > Please try the m2004 snapshot. You should have received an email about it. > > >> I wonder if xsdb is doing something. Are you able to set a break point > >> in the code I provided to the link to in zynq_start_bspsmp.c > > Maybe the JTAG hardware could cause this... > > It is not the hardware rather the xsdb software. You may need to tell it > to use the second core and what it needs to do. I know with OpenOCD you > need to tell it you have both cores running. > > Chris > _______________________________________________ > users mailing list > users@rtems.org > http://lists.rtems.org/mailman/listinfo/users -- Jonathan Brandmeyer Vice President of Software Engineering PlanetiQ
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