OK, using 224 as the MPIC interrupt number, and attempting to map it via irq_create_mapping(0,224) gives me a kernel seg fault:
Unable to handle kernel paging request for data at address 0x00000000 Faulting instruction address: 0xc0016540 Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT SMP NR_CPUS=2 EP8641A Modules linked in: Endpoint_driver(+) NIP: c0016540 LR: c0050b38 CTR: c00163b8 REGS: ef8c1ab0 TRAP: 0300 Not tainted (2.6.26.2-ep1.10) MSR: 00001032 <ME,IR,DR> CR: 24024482 XER: 00000000 DAR: 00000000, DSISR: 40000000 TASK = eedec6a0[60] 'insmod' THREAD: ef8c0000 CPU: 1 GPR00: 00000000 ef8c1b60 eedec6a0 ffffffea 00000000 00000000 c035c17c 000000e0 GPR08: 00400000 00000000 c035c020 00000000 24024422 100a7264 00000000 00000095 GPR16: 00000095 00000000 0000000d 00000124 f102fd98 00000000 c004a4fc f102c000 GPR24: 0000001a f1038400 00000000 c031e610 fffffffa 00009032 c031e5e0 000000e0 NIP [c0016540] mpic_set_irq_type+0x188/0x1c4 LR [c0050b38] set_irq_type+0x84/0xc8 Call Trace: [ef8c1b60] [c0050b1c] set_irq_type+0x68/0xc8 (unreliable) [ef8c1b80] [c001572c] mpic_host_map+0xec/0xf4 [ef8c1b90] [c00064a0] irq_setup_virq+0x60/0x98 [ef8c1bb0] [c00065dc] irq_create_mapping+0x104/0x114 [ef8c1bd0] [f1034798] Endpoint_device_ctor+0x258/0x3b8 [Endpoint_driver] Reading the source (since these calls don't seem to have any other documentation), it *looks* like it ought to be valid to call irq_create_mapping with a null irq_host *host - which is good, since I can't see anything obvious that would give me some other irq_host (again, since none of this seems to be documented anywhere). I am assuming the default host used by the system would be correct. However, then I get this fault. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
