PMM and liballoc port

kernel/libk/bm.h

@@ -0,0 +1,19 @@
+#ifndef _KERNEL_LIBK_BM_H
+#define _KERNEL_LIBK_BM_H
+
+#include <libk/std.h>
+
+struct bm {
+  uint8_t *base;
+  size_t nbits;
+};
+
+void bm_init(struct bm *bm, uint8_t *base, size_t nbits);
+void bm_set(struct bm *bm, size_t k);
+bool bm_set_region(struct bm *bm, size_t k, size_t m);
+void bm_clear(struct bm *bm, size_t k);
+void bm_clear_region(struct bm *bm, size_t k, size_t m);
+bool bm_test(struct bm *bm, size_t k);
+bool bm_test_region(struct bm *bm, size_t k, size_t m);
+
+#endif // _KERNEL_LIBK_BM_H