These patches add support for selecting page size on PPC 44x. First one adds support for 16K/64K pages while second one adds support for 256K pages along with some hacks.
However there are still number of problems: 1. We can't use default PKMAP_BASE definition with 64KB/256KB pages so we change it. Not sure that it's optimal. Then redefined PKMAP_BASE is not aligned on (1<<PMD_SHIFT), don't know if it is really bad. 2. with 16KB/64KB/256KB pages WARN_ON(!pmd_none(*pmd)) is triggered inside dma_alloc_init() function. Not sure if it is really bad. 3. with 256KB pages ENTRIES_PER_PAGEPAGE in mm/shem.c become zero. 4. We use asm-offsets mechanism to make PTE_SHIFT/PMD_SHIFT available in assembler but we don't really need the power of asm-offsets here. Maybe it will be more convinient to just take these defines out of #ifndef __ASSEMBLY__? But this would change asm-generic... We would appreciate any comment. Regards, Ilya. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
