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hw.physmem tunable allows to limit number of physical memory available to the
system. It's handled in machdep files for x86 and PowerPC. This patch adds
required logic to the consolidated physmem management interface that is used by
ARM, ARM64, and RISC-V.
Submitted by: Klara, Inc.
Reviewed by: mhorne
Sponsored by: Ampere Computing
Differential Revision: https://reviews.freebsd.org/D27152
Notes:
svn path=/head/; revision=368293
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Move dump_avail[] extern declaration and inlines into a new header
vm/vm_dumpset.h. This fixes default gcc build for mips.
Reviewed by: alc, scottph
Tested by: kevans (previous version)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26741
Notes:
svn path=/head/; revision=366711
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The arm_physmem interface found in arm's MD code provides a convenient
set of routines for adding/excluding physical memory regions and
initializing important kernel globals such as Maxmem, realmem,
phys_avail[], and dump_avail[]. It is especially convenient for FDT
systems, since we can use FDT parsing functions and pass the result
directly to one of these physmem routines. This interface is already in
use on arm and arm64, and can be used to simplify this early
initialization on RISC-V as well.
This requires only a couple trivial changes:
- Move arm_physmem_kernel_addr to arm/machdep.c. It is unused on arm64,
and manipulated entirely in arm MD code.
- Convert arm32_btop/arm64_btop to atop. This is equivalently defined
on all architectures.
- Drop the "arm" prefix.
Reviewed by: manu, emaste ("looks reasonable")
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D24153
Notes:
svn path=/head/; revision=360082
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