Archipelago » qemu

const void *qemu_devtree_getprop(void *fdt, const char *node_path,

                                 const char *property, int *lenp)

{

    int len;

    const void *r;

    if (!lenp) {

        lenp = &len;

    }

    r = fdt_getprop(fdt, findnode_nofail(fdt, node_path), property, lenp);

    if (!r) {

        fprintf(stderr, "%s: Couldn't get %s/%s: %s\n", __func__,

                node_path, property, fdt_strerror(*lenp));

        exit(1);

    }

    return r;

}

uint32_t qemu_devtree_getprop_cell(void *fdt, const char *node_path,

                                   const char *property)

{

    int len;

    const uint32_t *p = qemu_devtree_getprop(fdt, node_path, property, &len);

    if (len != 4) {

        fprintf(stderr, "%s: %s/%s not 4 bytes long (not a cell?)\n",

                __func__, node_path, property);

        exit(1);

    }

    return be32_to_cpu(*p);

}