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kernel by PHYS_TO_DMAP() as previously present on amd64, arm64, riscv, and
powerpc64. This introduces a new MI macro (PMAP_HAS_DMAP) that can be
evaluated at runtime to determine if the architecture has a direct map;
if it does not (or does) unconditionally and PMAP_HAS_DMAP is either 0 or
1, the compiler can remove the conditional logic.
As part of this, implement PHYS_TO_DMAP() on sparc64 and mips64, which had
similar things but spelled differently. 32-bit MIPS has a partial direct-map
that maps poorly to this concept and is unchanged.
Reviewed by: kib
Suggestions from: marius, alc, kib
Runtime tested on: amd64, powerpc64, powerpc, mips64
Notes:
svn path=/head/; revision=328168
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This fixes kernel build for armv6.
Discussed with: kib
Notes:
svn path=/head/; revision=313394
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Submitted by: kib
Notes:
svn path=/head/; revision=269813
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Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Notes:
svn path=/head/; revision=269808
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sendfile(2) buffers.
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Notes:
svn path=/head/; revision=269807
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The MD allocators were very common, however there were some minor
differencies. These differencies were all consolidated in the MI allocator,
under ifdefs. The defines from machine/vmparam.h turn on features required
for a particular machine. For details look in the comment in sys/sf_buf.h.
As result no MD code left in sys/*/*/vm_machdep.c. Some arches still have
machine/sf_buf.h, which is usually quite small.
Tested by: glebius (i386), tuexen (arm32), kevlo (arm32)
Reviewed by: kib
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
Notes:
svn path=/head/; revision=269577
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