forked from metaverse/kernel-dev-old
29 lines
921 B
C
29 lines
921 B
C
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#ifndef BITS_H
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#define BITS_H 1
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#include <types.h>
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#define bit_set(byte, n) (byte) |= (1 << (n));
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#define bit_reset(byte, n) (byte) &= ~(1 << (n));
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#define bit_get(byte, n) (((byte) & (1 << (n))) >> (n))
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#define bitmap_set(map, n) bit_set(((u8 *)(map))[(n) / 8], (n) % 8);
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#define bitmap_reset(map, n) bit_reset(((u8 *)(map))[(n) / 8], (n) % 8);
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#define bitmap_get(map, n) bit_get(map[(n) / 8], (n) % 8)
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// 向后对齐
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#define align_to(addr, align) \
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if ((usize)(addr) % (align) != 0) \
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{ \
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usize __align_to_tmp_addr = (usize)(addr); \
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__align_to_tmp_addr /= (align); \
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__align_to_tmp_addr++; \
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__align_to_tmp_addr *= (align); \
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addr = __align_to_tmp_addr; \
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}
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#define is_aligned(addr, align) \
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(addr % align == 0)
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#endif
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