/** Initialize allocated memory as a slab cache */
static void
_slab_cache_create(slab_cache_t *cache,
size_t size,
size_t align,
int (*constructor)(void *obj, int kmflag),
int (*destructor)(void *obj),
int flags)
{
int pages;
// ipl_t ipl;
// memsetb((uintptr_t)cache, sizeof(*cache), 0);
// cache->name = name;
//if (align < sizeof(unative_t))
// align = sizeof(unative_t);
// size = ALIGN_UP(size, align);
cache->size = size;
// cache->constructor = constructor;
// cache->destructor = destructor;
cache->flags = flags;
list_initialize(&cache->full_slabs);
list_initialize(&cache->partial_slabs);
list_initialize(&cache->magazines);
// spinlock_initialize(&cache->slablock, "slab_lock");
// spinlock_initialize(&cache->maglock, "slab_maglock");
// if (! (cache->flags & SLAB_CACHE_NOMAGAZINE))
// make_magcache(cache);
/* Compute slab sizes, object counts in slabs etc. */
/* Minimum slab order */
pages = SIZE2FRAMES(cache->size);
/* We need the 2^order >= pages */
if (pages <= 1)
cache->order = 0;
else
cache->order = fnzb(pages-1)+1;
while (badness(cache) > SLAB_MAX_BADNESS(cache)) {
cache->order += 1;
}
cache->objects = comp_objects(cache);
/* Add cache to cache list */
// ipl = interrupts_disable();
// spinlock_lock(&slab_cache_lock);
list_append(&cache->link, &slab_cache_list);
// spinlock_unlock(&slab_cache_lock);
// interrupts_restore(ipl);
}
/** Allocate memory with specified alignment
*
* @param align Alignment in byes.
* @param size Number of bytes to allocate.
*
* @return Allocated memory or NULL.
*
*/
void *memalign(const size_t align, const size_t size)
{
if (align == 0)
return NULL;
size_t palign =
1 << (fnzb(max(sizeof(void *), align) - 1) + 1);
futex_down(&malloc_futex);
void *block = malloc_internal(size, palign);
futex_up(&malloc_futex);
return block;
}
static uintptr_t
km_map_aligned(uintptr_t paddr, size_t size, unsigned int flags)
{
uintptr_t vaddr;
size_t align;
uintptr_t offs;
ASSERT(ALIGN_DOWN(paddr, FRAME_SIZE) == paddr);
ASSERT(ALIGN_UP(size, FRAME_SIZE) == size);
/* Enforce natural or at least PAGE_SIZE alignment. */
align = ispwr2(size) ? size : (1U << (fnzb(size) + 1));
vaddr = km_page_alloc(size, max(PAGE_SIZE, align));
page_table_lock(AS_KERNEL, true);
for (offs = 0; offs < size; offs += PAGE_SIZE) {
page_mapping_insert(AS_KERNEL, vaddr + offs, paddr + offs,
flags);
}
page_table_unlock(AS_KERNEL, true);
return vaddr;
}
