69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
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Copyright 2025 Kamil Kowalczyk
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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conditions 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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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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“AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <libk/types.h>
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#include <libk/bitmap.h>
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#include <mm/mregmap.h>
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static struct mregmap mregmap;
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struct mregmap *mregmap_get(void) { return &mregmap; }
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void mregmap_init(void) {
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bitmap_init(&mregmap.bm, (byte_t *)mregmap.bm_mem, MREGMAP_MAX);
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}
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bool_t mregmap_add_region(struct mreg *mreg) {
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bool_t ret = 1;
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for (usize_t i = 0; i < MREGMAP_MAX; i++) {
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if (!bitmap_test(&mregmap.bm, i)) {
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mregmap.mregs[i] = *mreg;
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bitmap_set(&mregmap.bm, i);
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goto done;
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}
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}
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ret = 0;
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done:
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return ret;
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}
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struct mreg *mregmap_first_avail(void) {
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for (usize_t i = 0; i < MREGMAP_MAX; i++) {
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if (mregmap.mregs[i].type == MREG_AVAIL_RAM) {
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return &mregmap.mregs[i];
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}
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}
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return NULL;
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}
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