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| /freebsd-10.3-release/sys/sparc64/pci/ | ||
| H A D | schizo.c | diff 184428 Tue Oct 28 22:21:22 MDT 2008 marius - Turn off interrupts instead of only entering a critical section while doing the block store workaround so we restore the correct floating-point registers state in case of nested floating-point operations resulting from nested interrupts. This allows the VIS-based block copy/zero functions to be used on machines requiring this workaround. Alternatively, we could take care of saving the floating-point registers here, which would be more inefficiently though and also involves turning off interrupts. - It turns out that the SCZ_PCI_DMA_SYNC register doesn't work like the TOMXMS_PCI_DMA_SYNC_PEND one (but more like the corresponding register in of Hummingbird and Sabre bridges) and writing the INO of the respective device to it causes a Safari bus error. However, due to the Schizo errata I-23, SCZ_PCI_DMA_SYNC can't be used as intended either, so remove consistent DMA syncing for Schzio bridges for now, which means that add-on cards with non-"sun4u compliant" (whatever that means exactly) PCI-PCI-bridges should be avoided until the proper workaround is implemented. [1] Reported by: Michael Moll [1] |
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