usr: sdk: Add sdk/param.h

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/usr/sdk/inc/sdk/param.h b/usr/sdk/inc/sdk/param.h
new file mode 100644
index 0000000..8c9633c
--- /dev/null
+++ b/usr/sdk/inc/sdk/param.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2025, Ian Moffett.
+ * Provided under the BSD-3 clause.
+ */
+
+#ifndef _SDK_PARAM_H_
+#define _SDK_PARAM_H_ 1
+
+#include <sdk/types.h>
+
+/* Offset a pointer +/- 'n' */
+#define PTR_OFFSET(P, OFF) (void *)((UQUAD)(P) + (OFF))
+#define PTR_NOFFSET(P, OFF) (void *)((UQUAD)(P) - (OFF))
+
+/* Bit related macros */
+#define ISSET(v, f)  ((v) & (f))
+#define BIT(n) (1ULL << (n))
+#define MASK(n) ((1ULL << n) - 1)
+
+/* Align up/down a value */
+#define ALIGN_DOWN(value, align)      ((value) & ~((align)-1))
+#define ALIGN_UP(value, align)        (((value) + (align)-1) & ~((align)-1))
+
+/* Bitmap helper macros */
+#define SETBIT(a, b) ((a)[(b) >> 3] |= BIT(b % 8))
+#define CLRBIT(a, b) ((a)[(b) >> 3] &= ~BIT(b % 8))
+#define TESTBIT(a, b) (ISSET((a)[(b) >> 3], BIT(b % 8)))
+
+#define NELEM(a) (sizeof(a) / sizeof(a[0]))
+
+#endif  /* !_SDK_PARAM_H_ */