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49439183ce
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
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_PHYSMEM_H_
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#define _SYS_PHYSMEM_H_
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/*
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* Routines to help configure physical ram.
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*
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* Multiple regions of contiguous physical ram can be added (in any order).
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*
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* Multiple regions of physical ram that should be excluded from crash dumps, or
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* memory allocation, or both, can be added (in any order).
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*
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* After all early kernel init is done and it's time to configure all
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* remainining non-excluded physical ram for use by other parts of the kernel,
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* physmem_init_kernel_globals() processes the hardware regions and
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* exclusion regions to generate the global dump_avail and phys_avail arrays
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* that communicate physical ram configuration to other parts of the kernel.
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*/
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#define EXFLAG_NODUMP 0x01
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#define EXFLAG_NOALLOC 0x02
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void physmem_hardware_region(uint64_t pa, uint64_t sz);
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void physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
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size_t physmem_avail(vm_paddr_t *avail, size_t maxavail);
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void physmem_init_kernel_globals(void);
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void physmem_print_tables(void);
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/*
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* Convenience routines for FDT.
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*/
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#ifdef FDT
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#include <machine/ofw_machdep.h>
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static inline void
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physmem_hardware_regions(struct mem_region * mrptr, int mrcount)
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{
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while (mrcount--) {
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physmem_hardware_region(mrptr->mr_start, mrptr->mr_size);
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++mrptr;
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}
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}
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static inline void
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physmem_exclude_regions(struct mem_region * mrptr, int mrcount,
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uint32_t exflags)
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{
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while (mrcount--) {
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physmem_exclude_region(mrptr->mr_start, mrptr->mr_size,
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exflags);
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++mrptr;
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}
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}
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#endif /* FDT */
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#endif /* !_SYS_PHYSMEM_H_ */
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