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62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/* See the end of this file for copyright and license terms. */
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#include <gay/kprintf.h>
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#include <gay/mm.h>
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#include <gay/types.h>
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#include <gay/util.h>
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extern void _image_start_phys;
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extern void _image_end_phys;
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/* these are initialized by pages_init() */
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void *kheap_start;
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void *kheap_end;
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int kmalloc_init(uintptr_t _phys_start, uintptr_t _phys_end)
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{
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/*
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* The kernel image is very likely gonna be within the physical memory
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* range, so we're gonna need to do some cropping in order to not hand
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* out pages that actually contain kernel code.
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* Furthermore, somebody should probably clean up this mess somehow.
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*/
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uintptr_t image_start_phys = (uintptr_t)&_image_start_phys;
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uintptr_t image_end_phys = (uintptr_t)&_image_end_phys;
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if (_phys_start < image_start_phys && _phys_end > image_start_phys) {
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if (image_start_phys - _phys_start > _phys_end - image_start_phys)
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_phys_end = image_start_phys;
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else
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_phys_start = image_end_phys;
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}
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if (_phys_start < image_end_phys && _phys_end > image_end_phys) {
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if (image_end_phys - _phys_start > _phys_end - image_end_phys)
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_phys_end = image_start_phys;
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else
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_phys_start = image_end_phys;
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}
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phys_start = uintptr_align(_phys_start, +HUGEPAGE_SHIFT);
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phys_end = uintptr_align(_phys_end, -HUGEPAGE_SHIFT);
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kprintf("Aligning physical memory to 0x%08x-0x%08x\n", phys_start, phys_end);
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int err = pages_init();
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if (err)
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return err;
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slab_init();
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return 0;
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}
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/*
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* This file is part of GayBSD.
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* Copyright (c) 2021 fef <owo@fef.moe>.
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*
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* GayBSD is nonviolent software: you may only use, redistribute, and/or
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* modify it under the terms of the Cooperative Nonviolent Public License
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* (CNPL) as found in the LICENSE file in the source code root directory
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* or at <https://git.pixie.town/thufie/npl-builder>; either version 7
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* of the license, or (at your option) any later version.
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*
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* GayBSD comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPL for details.
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*/
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