Hello, I'm in the process of porting a PCI-driver for a dsp-board from 2.4 to 2.6. The probing of the driver goes well, IRQs are setup, resources are claimed and remapped without any problems. Reading from I/O regions also works well. However, when i try to read or write to a memory region using readl/writel, the system instantly hangs. No stacktrace or anything, it just stops.
My question is what could cause the writel operation to hang the system? As far as I can tell, writel is a macro that expands to: *(volatile unsigned int*)(addr) = val; The addresses returned by io_remap are as follows: [ 13.200287] c64x.c: probing C64X board at pci slot 0000:00:17.0 [ 13.206263] c64x.c: BAR0: (0x52000000-0x523fffff) 0x21208 [ 13.211705] c64x.c: BAR1: (0x50000000-0x507fffff) 0x20200 [ 13.217152] c64x.c: BAR2: (0x1000-0x100f) 0x20101 [ 13.221899] c64x.c: BAR3: (0x0-0x0) 0x0 [ 13.225787] c64x.c: BAR4: (0x0-0x0) 0x0 [ 13.229670] c64x.c: BAR5: (0x0-0x0) 0x0 [ 13.233765] BAR0 mapped to c9100000 [ 13.237622] BAR1 mapped to c9580000 [ 13.241286] c64x.c: board c64x0 registered [ 13.248924] c64x.c: probing C64X board at pci slot 0000:00:18.0 [ 13.254888] c64x.c: BAR0: (0x52400000-0x527fffff) 0x21208 [ 13.260328] c64x.c: BAR1: (0x50800000-0x50ffffff) 0x20200 [ 13.265776] c64x.c: BAR2: (0x1010-0x101f) 0x20101 [ 13.270528] c64x.c: BAR3: (0x0-0x0) 0x0 [ 13.274415] c64x.c: BAR4: (0x0-0x0) 0x0 [ 13.278302] c64x.c: BAR5: (0x0-0x0) 0x0 [ 13.282389] BAR0 mapped to c9e00000 [ 13.286250] BAR1 mapped to ca280000 [ 13.289845] c64x.c: board c64x1 registered [ 13.297468] c64x.c: probing C64X board at pci slot 0000:00:19.0 [ 13.303434] c64x.c: BAR0: (0x52800000-0x52bfffff) 0x21208 [ 13.308885] c64x.c: BAR1: (0x51000000-0x517fffff) 0x20200 [ 13.314328] c64x.c: BAR2: (0x1020-0x102f) 0x20101 [ 13.319079] c64x.c: BAR3: (0x0-0x0) 0x0 [ 13.322966] c64x.c: BAR4: (0x0-0x0) 0x0 [ 13.326855] c64x.c: BAR5: (0x0-0x0) 0x0 [ 13.330939] BAR0 mapped to cab00000 [ 13.334797] BAR1 mapped to caf80000 [ 13.338392] c64x.c: board c64x2 registered [ 13.346017] c64x.c: probing C64X board at pci slot 0000:00:1a.0 [ 13.351983] c64x.c: BAR0: (0x52c00000-0x52ffffff) 0x21208 [ 13.357435] c64x.c: BAR1: (0x51800000-0x51ffffff) 0x20200 [ 13.362877] c64x.c: BAR2: (0x1030-0x103f) 0x20101 [ 13.367627] c64x.c: BAR3: (0x0-0x0) 0x0 [ 13.371521] c64x.c: BAR4: (0x0-0x0) 0x0 [ 13.375409] c64x.c: BAR5: (0x0-0x0) 0x0 [ 13.379489] BAR0 mapped to cb800000 [ 13.383355] BAR1 mapped to cbc80000 [ 13.386953] c64x.c: board c64x3 registered The system is MPC5200b-based. lspci is not available, but the resources are located in the following manner: # cat /sys/bus/pci/devices/0000\:00\:17.0/resource 0x0000000052000000 0x00000000523fffff 0x0000000000021208 0x0000000050000000 0x00000000507fffff 0x0000000000020200 0x0000000000001000 0x000000000000100f 0x0000000000020101 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 # cat /sys/bus/pci/devices/0000\:00\:18.0/resource 0x0000000052400000 0x00000000527fffff 0x0000000000021208 0x0000000050800000 0x0000000050ffffff 0x0000000000020200 0x0000000000001010 0x000000000000101f 0x0000000000020101 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 # cat /sys/bus/pci/devices/0000\:00\:19.0/resource 0x0000000052800000 0x0000000052bfffff 0x0000000000021208 0x0000000051000000 0x00000000517fffff 0x0000000000020200 0x0000000000001020 0x000000000000102f 0x0000000000020101 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 # cat /sys/bus/pci/devices/0000\:00\:1a.0/resource 0x0000000052c00000 0x0000000052ffffff 0x0000000000021208 0x0000000051800000 0x0000000051ffffff 0x0000000000020200 0x0000000000001030 0x000000000000103f 0x0000000000020101 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 -- Hälsningar/Regards Tobias Knutsson _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
