src/util.h

/*
 * Copyright 2019, Data61
 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
 * ABN 41 687 119 230.
 *
 * This software may be distributed and modified according to the terms of
 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
 * See "LICENSE_BSD2.txt" for details.
 *
 * @TAG(DATA61_BSD)
 */
#include <sel4runtime/stddef.h>
#include <sel4runtime/stdint.h>

#define ALIGN_UP(x, n) (((x) + (n) - 1) & ~((n) - 1))
#define ALIGN_DOWN(x, n) ((x) & ~((n) - 1))

#define ROUND_DOWN(n, b) \
    ({ typeof (n) _n = (n); \
       typeof (b) _b = (b); \
       _n - (_n % _b); \
    })

#define ROUND_UP(n, b) \
    ({ typeof (n) _n = (n); \
       typeof (b) _b = (b); \
       (_n + (_n % _b == 0 ? 0 : (_b - (_n % _b)))); \
    })

/*
 * We have our own copies of memset and memcpy to avoid conflicts and
 * dependencies on libc.
 */

void *__sel4runtime_memcpy(
    void *restrict dest,
    const void *restrict src,
    sel4runtime_size_t n
);
void *__sel4runtime_memset(void *dest, int c, sel4runtime_size_t n);