Function bcm_find_core

freebsd/mips/broadcom/bcm_machdep.c:184–219

* Search the device enumeration table for a core matching @p descs, * * @param bp Platform state containing a valid EROM parser. * @param descs The core match descriptor table. * @param num_descs The number of match descriptors in @p descs. * @param[out] info If non-NULL, will be populated with the core * info. * @param[out] addr If non-NULL, will be populated with the core's *

 *				physical register address.
 */
static int
bcm_find_core(struct bcm_platform *bp, const struct bhnd_core_match *descs,
    size_t num_descs, struct bhnd_core_info *info, uintptr_t *addr)
{
	bhnd_addr_t		b_addr;
	bhnd_size_t		b_size;
	int			error;

	/* Fetch core info */
	for (size_t i = 0; i < num_descs; i++) {
		error = bhnd_erom_lookup_core_addr(&bp->erom.obj, &descs[i],
		    BHND_PORT_DEVICE, 0, 0, info, &b_addr, &b_size);

		/* Terminate search on first match */
		if (error == 0)
			break;

		/* Terminate on first error (other than core not found) */
		if (error != ENOENT)
			return (error);

		/* Continue search ... */
	}

	/* Provide the core's base address */
	if (addr != NULL && b_addr > UINTPTR_MAX) {
		BCM_ERR("core address %#jx overflows native address width\n",
		    (uintmax_t)b_addr);
		return (ERANGE);
	}

	if (addr != NULL)
		*addr = b_addr;

	return (0);
}

/**
 * Read a variable directly from NVRAM, decoding as @p type.