sys: Add sys/param.h

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

1 files changed, 80 insertions, 0 deletions

diff --git a/src/sys/include/sys/param.h b/src/sys/include/sys/param.h
new file mode 100644
index 0000000..36340cb
--- /dev/null
+++ b/src/sys/include/sys/param.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2025 Ian Marco Moffett and Ethos0 engineers
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SYS_PARAM_H_
+#define _SYS_PARAM_H_ 1
+
+/* Assumed cache line size */
+#ifndef COHERENCY_UNIT
+#define COHERENCY_UNIT 64
+#endif
+
+/* Bit related macros */
+#define ISSET(v, f)  ((v) & (f))
+#define BIT(n) (1ULL << (n))
+#define MASK(n) ((1ULL << n) - 1)
+
+/* Min/max macros */
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+
+/* Align up/down a value */
+#define ALIGN_DOWN(value, align)      ((value) & ~((align)-1))
+#define ALIGN_UP(value, align)        (((value) + (align)-1) & ~((align)-1))
+#define MALIGN(value)                 ALIGN_UP((value), M_WORD_SIZE)
+
+/* 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)))
+
+/* Combine bits */
+#define COMBINE8(h, l) ((uint16_t)((uint16_t)(h) << 8) | (l))
+#define COMBINE16(h, l) ((uint32_t)((uint32_t)(h) << 16) | (l))
+#define COMBINE32(h, l) ((uint64_t)((uint64_t)(h) << 32) | (l))
+
+/*
+ * Checks if value, `v' is in range of least, 'l'
+ * and max, 'm'.
+ */
+#define IN_RANGE(V, L, M) (((V) >= (L)) && ((V) <= (M)))
+
+/* Gives 1 if pointer is aligned */
+#define PTR_ALIGNED(PTR, ALIGN) (!((uintptr_t)PTR & (ALIGN - 1)))
+
+/*
+ * PTR_OFFSET: Adds an offset to the pointer
+ * PTR_NOFFSET: Subtracts a negative offset from the pointer
+ */
+#define PTR_OFFSET(PTR, OFF) ((void *)((uintptr_t)PTR + OFF))
+#define PTR_NOFFSET(PTR, NOFF) ((void *)((uintptr_t)PTR - NOFF))
+
+#define NELEM(a) (sizeof(a) / sizeof(a[0]))
+
+#endif  /* _SYS_PARAM_H_ */