mirror of https://github.com/dzavalishin/oskit/
52 lines
1.9 KiB
C
Executable File
52 lines
1.9 KiB
C
Executable File
/*
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* Copyright (c) 1995, 1998, 1999 University of Utah and the Flux Group.
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* All rights reserved.
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*
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* This file is part of the Flux OSKit. The OSKit is free software, also known
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* as "open source;" you can redistribute it and/or modify it under the terms
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* of the GNU General Public License (GPL), version 2, as published by the Free
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* Software Foundation (FSF). To explore alternate licensing terms, contact
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* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
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*
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* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
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* received a copy of the GPL along with the OSKit; see the file COPYING. If
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* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
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*/
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#include <oskit/lmm.h>
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#include <oskit/arm32/physmem.h>
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#include <oskit/arm32/shark/base_vm.h>
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#include <oskit/arm32/shark/phys_lmm.h>
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void phys_lmm_add(oskit_addr_t min_pa, oskit_size_t size)
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{
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oskit_addr_t max_pa = min_pa + size;
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oskit_addr_t min_va = phystokv(min_pa);
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oskit_addr_t max_va = phystokv(max_pa);
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/*
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* Add the memory region to the malloc_lmm.
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* Because of virtual-to-physical translation,
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* a physical region may wrap around virtual address zero.
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* Naturally, the LMM doesn't like this,
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* so we have to split it appropriately here.
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* The LMM package will take care of splitting it up further
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* if necessary according to the PC's physical memory regions.
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*/
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if (max_va >= min_va) {
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lmm_add_free(&malloc_lmm, (void*)min_va, max_va - min_va);
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} else {
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lmm_add_free(&malloc_lmm, (void*)min_va, 0xffffffff - min_va);
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lmm_add_free(&malloc_lmm, (void*)0, max_va);
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}
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/* Keep track of the maximum/minumim physical address seen */
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if (max_pa > phys_mem_max)
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phys_mem_max = max_pa;
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if (min_pa < phys_mem_min)
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phys_mem_min = min_pa;
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}
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