参照元†
- struct reserved_mem *rmem
返り値†
static int __init rmem_cma_setup(struct reserved_mem *rmem)
{
phys_addr_t align = PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order);
phys_addr_t mask = align - 1;
unsigned long node = rmem->fdt_node;
struct cma *cma;
int err;
if (!of_get_flat_dt_prop(node, "reusable", NULL) ||
of_get_flat_dt_prop(node, "no-map", NULL))
return -EINVAL;
if ((rmem->base & mask) || (rmem->size & mask)) {
pr_err("Reserved memory: incorrect alignment of CMA region\n");
return -EINVAL;
}
err = cma_init_reserved_mem(rmem->base, rmem->size, 0, &cma);
if (err) {
pr_err("Reserved memory: unable to setup CMA region\n");
return err;
}
/* Architecture specific contiguous memory fixup. */
dma_contiguous_early_fixup(rmem->base, rmem->size);
if (of_get_flat_dt_prop(node, "linux,cma-default", NULL))
dma_contiguous_set_default(cma);
rmem->ops = &rmem_cma_ops;
rmem->priv = cma;
pr_info("Reserved memory: created CMA memory pool at %pa, size %ld MiB\n",
&rmem->base, (unsigned long)rmem->size / SZ_1M);
return 0;
}
コメント†