Hi, Does anyone know if there is a way to make DBGEN signal high on OMAP3530 and/or DM3730 without using a hardware debugger? My goal is to make use of hardware watchpoints in Cortex-A8, but that requires DBGEN to be high. The TRM states: "The DBGEM signal on the Cortex-A8 is driven by setting bit 13 at address 0x5401 D030 in the DAP-APB address space." However regardless of how hard I try the writes to that register seem to be ignored. I even tried to do it from IVA/C64x with no success. (I assume DBGEM is a typo since Cortex-A8 manuals have no mention of it, and they meant DBGEN there). It seems others had this problem too, and TI is as helpful as ever: http://e2e.ti.com/support/dsp/omap_applications_processors/f/447/p/30011/104527 DBGEN is mentioned by Will Deacon's commit 8954bb0da99b76c7ce5edf2f314807cff68b6ea8 , but I guess he mixed NIDEN with DBGEN there (DBGAUTHSTATUS returns 0x000000ae so NIDEN is indeed set here, and I have tried old kernel where OMAP3_EMU was still available). 0x5401D030 is referenced by some OpenOCD scripts, so I guess it's writeable over jtag, but not by the CPU(s). It's quite a mysterious otherwise undocumented register, I've noticed it's bit21 is some status bit related to Cortex-A8's low power states. Gražvydas -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
