John, Polling in wait_for_pracc_rw() doesn't work. The way I understand it is that read/write are used to catch a memory fetch/write that the processor. After that the Pracc bit is cleared to 0 to allow the processor to 'process' the fetch. I suspect the AU1100 is not updating this register properly and needs extra TCK clocks. So my loop is actually clocking the CPU / EJTAG into the next command. A safer way to do this is using jtag_add_clocks/jtag_execute_command. Toggling TCK in the idle state doesn't hurt anything and it seems to work. I added 5 extra clocks after clearing the Pracc bit. The documentation is very unclear at this point; there is some clock domain synchronisation going on between the CPU clock and TCK.
Met vriendelijke groet / Best regards, DEA bv ing. Nico Coesel Kweekgrasstraat 18 1313BX Almere tel: +31 (0)36 5343888 fax: +31 (0)36 5342244 e-mail: ncoe...@dealogic.nl www.c-lock.nl www.dealogic.nl (op al onze leveringen van goederen en diensten zijn onze algemene voorwaarden van toepassing zoals gedeponeerd bij de KvK te Lelystad, inschrijfnummer 39046783) > -----Oorspronkelijk bericht----- > Van: John McCarthy [mailto:jg...@magma.ca] > Verzonden: donderdag 9 april 2009 4:00 > Aan: Nico Coesel > CC: openocd-development@lists.berlios.de > Onderwerp: Re: [Openocd-development] AU1100 (MIPS) problems Fixed! > > Hi Nico, > > On Wed, 2009-04-08 at 13:12 +0200, Nico Coesel wrote: > > I did some debugging and found that the Pracc flag needs to > be polled > > for the AU1100 device to work properly. I've attached a > patch against > > mips32_pracc.c. I assume the (minor) changes do not affect > other MIPS > > targets. > > Hmm, but your patch does more than poll. It loops clearing > PRACC each time through the loop till it reads clear. This > will miss processor accesses after the access your trying to > process. When > mips32_pracc_exec_read/write() is called, the PRACC bit is > supposed to be already set. PRACC set means the CPU is > waiting for a read or write from the the EJTAG debug memory region. > > If the AU1100 needs polling then you should do it in > wait_for_pracc_rw(), waiting from PRACC to become set. Once > PRACC is set then the original code in > mips32_pracc_exec_read/write() should work fine. PRACC > should always be clear on return (it just releases the CPU to > perform another instruction). > > Setting PRACC is a no-op, only clearing it has an effect and > only when it was set by an active CPU access to the EJTAG > debug region. > > Can you try polling in wait_for_pracc_rw() with the original > code in mips32_pracc_exec_read/write()? The code in your > patch would not work on other MIPS targets and I'm surprised > it works on the AU1100. > > > Cheers, > John McCarthy. > > > > > Nico Coesel > > > > > > -----Oorspronkelijk bericht----- > > Van: Nico Coesel > > Verzonden: dinsdag 7 april 2009 17:00 > > Aan: 'openocd-development@lists.berlios.de' > > Onderwerp: AU1100 (MIPS) problems > > > > Hello all, > > I'm trying to get Openocd + a wiggler interface working > with an AU1100 > > MIPS based SOC. It seems the chip is recognized correctly (the JTAG > > interface is working) but I can't access the memory. When I try to > > read or write data the debug shows 'No memory access in progress!'. > > Anyone has some suggestions on where to start looking? I've > included > > the output from OpenOCD below: > > > > > > Debug: 7 0 command.c:91 script_command(): script_command - > > reset_config > > Debug: 8 0 command.c:108 script_command(): script_command - > > reset_config, argv[0]=ocd_reset_config > > Debug: 9 0 command.c:108 script_command(): script_command - > > reset_config, argv[1]=trst_and_srst > > Debug: 11 0 command.c:91 script_command(): script_command - > interface > > Debug: 12 0 command.c:108 script_command(): script_command - > > interface, argv[0]=ocd_interface > > Debug: 13 0 command.c:108 script_command(): script_command - > > interface, argv[1]=parport > > Debug: 15 0 command.c:91 script_command(): script_command - > > parport_port > > Debug: 16 0 command.c:108 script_command(): script_command - > > parport_port, argv[0]=ocd_parport_port > > Debug: 17 0 command.c:108 script_command(): script_command - > > parport_port, argv[1]=0x378 > > Debug: 19 0 command.c:91 script_command(): script_command - > > parport_cable > > Debug: 20 0 command.c:108 script_command(): script_command - > > parport_cable, argv[0]=ocd_parport_cable > > Debug: 21 0 command.c:108 script_command(): script_command - > > parport_cable, argv[1]=wiggler2 > > Debug: 23 0 command.c:91 script_command(): script_command - > > jtag_nsrst_delay > > Debug: 24 0 command.c:108 script_command(): script_command - > > jtag_nsrst_delay, argv[0]=ocd_jtag_nsrst_delay > > Debug: 25 0 command.c:108 script_command(): script_command - > > jtag_nsrst_delay, argv[1]=100 > > Debug: 27 0 command.c:91 script_command(): script_command - > > jtag_ntrst_delay > > Debug: 28 0 command.c:108 script_command(): script_command - > > jtag_ntrst_delay, argv[0]=ocd_jtag_ntrst_delay > > Debug: 29 0 command.c:108 script_command(): script_command - > > jtag_ntrst_delay, argv[1]=100 > > Debug: 31 0 command.c:91 script_command(): script_command - > jtag_speed > > Debug: 32 0 command.c:108 script_command(): script_command - > > jtag_speed, argv[0]=ocd_jtag_speed > > Debug: 33 0 command.c:108 script_command(): script_command - > > jtag_speed, argv[1]=0 > > Debug: 34 0 jtag.c:2620 handle_jtag_speed_command(): handle > jtag speed > > User : 35 0 command.c:383 command_print(): jtag_speed: 0 > > Debug: 36 0 jtag.c:1892 jim_newtap_cmd(): Creating New Tap, Chip: > > _CHIPNAME, Tap: cpu, Dotted: _CHIPNAME.cpu, 6 params > > Debug: 37 0 jtag.c:1911 jim_newtap_cmd(): Processing option: -irlen > > Debug: 38 0 jtag.c:1911 jim_newtap_cmd(): Processing option: > > -ircapture > > Debug: 39 0 jtag.c:1911 jim_newtap_cmd(): Processing option: -irmask > > Debug: 40 0 jtag.c:2024 jim_newtap_cmd(): Created Tap: > _CHIPNAME.cpu @ > > abs position 0, irlen 5, capture: 0x1 mask: 0x1 > > Debug: 41 0 target.c:3911 jim_target(): Target command params: > > Debug: 42 0 target.c:3912 jim_target(): target create _CHIPNAME.cpu > > mips_m4k -endian big -chain-position _CHIPNAME.cpu -variant > ejtag_srst > > Debug: 44 0 command.c:91 script_command(): script_command - bank > > Debug: 45 0 command.c:108 script_command(): script_command - bank, > > argv[0]=ocd_flash_bank > > Debug: 46 0 command.c:108 script_command(): script_command - bank, > > argv[1]=cfi > > Debug: 47 0 command.c:108 script_command(): script_command - bank, > > argv[2]=0xbf000000 > > Debug: 48 0 command.c:108 script_command(): script_command - bank, > > argv[3]=0x1000000 > > Debug: 49 0 command.c:108 script_command(): script_command - bank, > > argv[4]=2 > > Debug: 50 0 command.c:108 script_command(): script_command - bank, > > argv[5]=4 > > Debug: 51 0 command.c:108 script_command(): script_command - bank, > > argv[6]=0 User : 52 0 command.c:494 command_run_line(): > > Debug: 54 0 command.c:91 script_command(): script_command - init > > Debug: 55 0 command.c:108 script_command(): script_command - init, > > argv[0]=ocd_init > > Debug: 56 0 openocd.c:144 handle_init_command(): target > init complete > > Debug: 57 0 parport.c:402 parport_init(): requesting privileges for > > parallel port 0x378... > > Debug: 58 0 parport.c:412 parport_init(): ...privileges granted > > Debug: 59 0 parport.c:237 parport_reset(): trst: 0, srst: 0 > > Debug: 60 0 openocd.c:151 handle_init_command(): jtag > interface init > > complete > > Debug: 61 0 jtag.c:2240 jtag_init_inner(): Init JTAG chain > > Debug: 62 0 jtag.c:434 jtag_call_event_callbacks(): jtag > event: JTAG > > controller reset (RESET or TRST) > > Debug: 63 0 jtag.c:1487 jtag_reset_callback(): - > > Debug: 64 0 jtag.c:434 jtag_call_event_callbacks(): jtag > event: JTAG > > controller reset (RESET or TRST) > > Debug: 65 0 jtag.c:1487 jtag_reset_callback(): -Info : 66 15 > > jtag.c:1607 > > jtag_examine_chain(): JTAG tap: CHIPNAME.cpu tap/devic e found: > > 0x4020228f (Manufacturer: 0x147, Part: 0x0202, Version: 0x4) > > Debug: 67 15 jtag.c:434 jtag_call_event_callbacks(): jtag > event: JTAG > > controller reset (RESET or TRST) > > Debug: 68 15 jtag.c:1487 jtag_reset_callback(): - > > Debug: 69 15 openocd.c:157 handle_init_command(): jtag init complete > > Debug: 70 15 mips_ejtag.c:269 mips_ejtag_init(): impcode: 0x20404000 > > Debug: 71 15 mips_ejtag.c:280 mips_ejtag_init(): EJTAG: Version 2.5 > > Detected > > Debug: 72 15 mips_ejtag.c:300 mips_ejtag_init(): EJTAG: > features: R4k > > ASID_8 noDMA MIPS32 > > Debug: 73 15 openocd.c:160 handle_init_command(): jtag examine > > complete > > Debug: 74 15 openocd.c:166 handle_init_command(): flash > init complete > > Debug: 75 15 openocd.c:170 handle_init_command(): mflash > init complete > > Debug: 76 15 openocd.c:174 handle_init_command(): NAND init complete > > Debug: 77 15 openocd.c:178 handle_init_command(): pld init complete > > Warn > > : 78 15 gdb_server.c:2201 gdb_init(): no gdb port specified, using > > default port 3333 > > Debug: 79 15 gdb_server.c:2225 gdb_init(): gdb service for target > > mips_m4k at port 3333 Warn : 80 15 tcl_server.c:178 > tcl_init(): no tcl > > port specified, using default port 6666 User : 81 15 command.c:494 > > command_run_line(): > > Debug: 82 109 mips_m4k.c:182 mips_m4k_poll(): Reset > Detected Info : 83 > > 2921 server.c:89 add_connection(): accepting 'telnet' > connection from > > 0 > > Debug: 85 8078 command.c:91 script_command(): script_command - halt > > Debug: 86 8078 command.c:108 script_command(): > script_command - halt, > > argv[0]=ocd_halt > > Debug: 87 8078 target.c:1744 handle_halt_command(): - > > Debug: 88 8078 mips_m4k.c:226 mips_m4k_halt(): > target->state: running > > Debug: 89 8078 mips_ejtag.c:217 mips_ejtag_enter_debug(): > ejtag_ctrl: > > 0x4004c008 > > > > Debug: 90 8078 mips32_pracc.c:54 wait_for_pracc_rw(): > DEBUGMODULE: No > > memory access in progress! > > > > Debug: 91 8078 mips_m4k.c:729 mips_m4k_read_memory(): address: > > 0xff300000, size: 0x00000004, count: 0x00000001 > > Debug: 92 8078 mips32_pracc.c:54 wait_for_pracc_rw(): > DEBUGMODULE: No > > memory access in progress! > > > > Debug: 93 8078 target.c:1190 target_read_u32(): address: 0xff300000 > > failed > > Debug: 94 8078 mips32_pracc.c:54 wait_for_pracc_rw(): > DEBUGMODULE: No > > memory access in progress! > > > > Debug: 95 8078 mips_m4k.c:154 mips_m4k_debug_entry(): entered debug > > state at PC0x0, target->state: halted > > Debug: 96 8078 target.c:696 target_call_event_callbacks(): target > > event > > 4 (early-halted) > > Debug: 97 8078 target.c:3054 target_handle_event(): event: 4 > > early-halted - no action > > Debug: 98 8078 target.c:696 target_call_event_callbacks(): target > > event > > 5 (halted) > > Debug: 99 8078 target.c:3054 target_handle_event(): event: > 5 halted - > > no action User : 100 8078 target.c:959 target_arch_state(): > target state: > > halted User : 101 8078 mips32.c:273 mips32_arch_state(): > target halted > > due to debug-request, pc: 0x00000000 User : 102 8078 command.c:494 > > command_run_line(): > > Debug: 104 11468 command.c:91 script_command(): script_command - mdw > > Debug: 105 11468 command.c:108 script_command(): > script_command - mdw, > > argv[0]=ocd_mdw > > Debug: 106 11468 command.c:108 script_command(): > script_command - mdw, > > argv[1]=0xb1900000 > > Debug: 107 11468 command.c:108 script_command(): > script_command - mdw, > > argv[2]=2 > > > > Debug: 108 11468 mips_m4k.c:729 mips_m4k_read_memory(): address: > > 0xb1900000, size: 0x00000004, count: 0x00000002 > > Debug: 109 11468 mips32_pracc.c:54 wait_for_pracc_rw(): > DEBUGMODULE: > > No memory access in progress! > > > > Debug: 110 11468 command.c:427 run_command(): Command failed with > > error code -107 User : 111 11468 command.c:626 > openocd_jim_vfprintf(): > > Runtime error, file "command.c", line 456: > > User : 112 11468 command.c:626 openocd_jim_vfprintf(): > > > > > > Met vriendelijke groet / Best regards, DEA bv > > > > Nico Coesel > > _______________________________________________ > > Openocd-development mailing list > > Openocd-development@lists.berlios.de > > https://lists.berlios.de/mailman/listinfo/openocd-development > > _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
