karina
23 lines
746 B
C
23 lines
746 B
C
#include <VM/PMM.h>
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static inline Size BitmapGetByteIndex(Address address) {
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return (address / kVMPageSize) / kVMBlocksPerByte;
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}
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static inline UInt8 BitmapGetBitOffset(Address address) {
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return (UInt8)((address / kVMPageSize) % kVMBlocksPerByte);
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}
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static inline Boolean BitmapTest(const MemoryPointer bitmap, Address address) {
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return (bitmap[BitmapGetByteIndex(address)] & (1U << BitmapGetBitOffset(address))) != 0;
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}
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static inline void BitmapSet(MemoryPointer bitmap, Address address) {
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bitmap[BitmapGetByteIndex(address)] |= (1U << BitmapGetBitOffset(address));
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}
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static inline void BitmapUnset(MemoryPointer bitmap, Address address) {
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bitmap[BitmapGetByteIndex(address)] &= ~(1U << BitmapGetBitOffset(address));
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}
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