47 lines
No EOL
1.3 KiB
C
47 lines
No EOL
1.3 KiB
C
/*
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Copyright 2019 Benji Dial
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Permission to use, copy, modify, and/or distribute this
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software for any purpose with or without fee is hereby
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granted, provided that the above copyright notice and this
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permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS
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ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
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EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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OF THIS SOFTWARE.
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*/
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#include <stdint.h>
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#ifndef MEM_H
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#define MEM_H
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enum special_mmap_codes {
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FREE = 0,
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HARDWARE = 1,
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KERNEL = 2
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};
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struct mmap_entry {
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uint32_t base;
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uint32_t length;
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uint16_t whose;
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struct mmap_entry *after;
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struct mmap_entry *before;
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};
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#define MMAP_SIZE 65536
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struct mmap_entry *mmap_start;
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struct mmap_entry mmap_bss[MMAP_SIZE];
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uint32_t mmap_bitmap[MMAP_SIZE / 32];
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#define unmark_entry(entry) (mmap_bitmap[((entry) - mmap_bss) >> 5] ^= 1 << (((entry) - mmap_bss) & 0x0000001f))
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void *allocate_block(uint32_t size, uint16_t proc_n);
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void deallocate_block(void *start);
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#endif |