Le 17/10/2021 à 12:00, Mark Cave-Ayland a écrit : ... > I've just tried this on Linux, and it seems to work okay although I get > several copies of the > register dump on the console for a single invocation of "info nmi" e.g. > > [ 4.610000] Non-Maskable Interrupt > [ 4.610000] Modules linked in: mac_esp(+) esp_scsi macsonic > [ 4.610000] PC: [<00002dc0>] arch_cpu_idle+0x4/0x6 > [ 4.610000] SR: 2000 SP: (ptrval) a2: 00395314 > [ 4.610000] d0: 00000000 d1: 00000002 d2: 0004b492 d3: 00392000 > [ 4.610000] d4: 00000000 d5: 00000000 a0: 00392000 a1: 00395314 > [ 4.610000] Process swapper (pid: 0, task=(ptrval)) > [ 4.610000] Frame format=0 > [ 4.610000] Stack from 00393f9c: > [ 4.610000] 0004b540 00000431 0040ee22 0004b4c4 0002bf6a 004005f0 > 00393ff8 0004b714 > [ 4.610000] 0003e23a 0029c518 000000c2 0040eb54 3dc1e5d0 00000000 > 0004ff74 0003efe2 > [ 4.610000] 003f4e92 00000000 00000040 00000000 00000000 00000000 > 0040ee22 00000000 > [ 4.610000] 003f3872 > [ 4.610000] Call Trace: [<0004b540>] do_idle+0x7c/0xd2 > [ 4.610000] [<0004b4c4>] do_idle+0x0/0xd2 > [ 4.610000] [<0002bf6a>] kernel_thread+0x0/0x26 > [ 4.610000] [<004005f0>] __alloc_bootmem+0x0/0x38 > [ 4.610000] [<0004b714>] cpu_startup_entry+0xe/0x12 > [ 4.610000] [<0003e23a>] find_task_by_pid_ns+0x0/0x22 > [ 4.610000] [<0029c518>] rest_init+0x78/0x82 > [ 4.610000] [<0004ff74>] printk+0x0/0x18 > [ 4.610000] [<0003efe2>] parse_args+0x0/0x2c2 > [ 4.610000] [<003f4e92>] start_kernel+0x43e/0x448 > [ 4.610000] [<003f3872>] _sinittext+0x872/0x11f8 > [ 4.610000] Code: bc00 0060 f210 f0ff 7001 60cc 4e72 2000 <4e75> 2079 003b > fc6c 4a88 6702 4e90 > 60fe 2079 003b fc68 4a88 6702 4e90 60fe 2f0c > > (repeated 7 or 8 times) > > MacsBug seems to handle this better: as soon as the NMI is triggered, MacsBug > opens and displays > "NMI" both if the programmer switch GPIO is held active, or pulsed as > implemented in the patch. When > using the above patch, subsequent NMI triggers do not display "NMI" or change > MacsBug in any visible > way which suggests that once the NMI is triggered, the NMI is ignored until > the programmers switch > GPIO is inactive once again. > > Do you see the repeated register output in Linux for a single press of the > programmers switch on a > real Quadra 800? It may be that Linux could be improved by having similar > logic.
In fact, register output is repeated while I keep the button pressed (5.14 kernel provided by Finn) If I press and release one (or several) time(s) before the end of the first output I have only one output. Thanks, Laurent
