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6d2ddc2f94
Implement clear_page_asm and copy_page_asm. These are optimized routines to clear and copy a page. I tested prefetch optimizations in clear_page_asm and copy_page_asm but didn't see any significant performance improvement on rp3440. I'm not sure if these are routines are significantly faster than memset and/or memcpy, but they are there for further performance evaluation. TLB purge operations on PA 1.X SMP machines are now serialized with the help of the new tlb_lock() and tlb_unlock() macros, since on some PA-RISC machines, TLB purges need to be serialized in software. Obviously, lock isn't needed in UP kernels. On PA 2.0 machines, there is a local TLB instruction which is much less disruptive to the memory subsystem. No lock is needed for local purge. Loops are also unrolled in flush_instruction_cache_local and flush_data_cache_local. The implementation of what used to be copy_user_page (now copy_user_page_asm) is now fixed. Additionally 64-bit support is now added. Read the preceding comment which I didn't change. I left the comment but it is now inaccurate. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de> |
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| .. | ||
| configs | ||
| hpux | ||
| include | ||
| kernel | ||
| lib | ||
| math-emu | ||
| mm | ||
| oprofile | ||
| defpalo.conf | ||
| install.sh | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| nm | ||