1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
37 #include <sys/bus.h>
40 #include <machine/bus.h>
57 		    bhnd_size_t offset, u_int width);
65 		    bhnd_size_t offset, u_int width);
76 	int			 mapped_rid;	/**< resource ID of current mapping, or -1 */
80  * Fetch the device enumeration parser class from all bhnd(4)-compatible drivers
84  * @param	bus_devclass	The bus device class to be queried for
85  *				bhnd(4)-compatible drivers.
86  * @param	eio		An erom bus I/O instance, configured with a
87  *				mapping of the first bus core.
94  * @retval non-NULL	on success, the best available EROM class.
133 		/* Probe the bus */  in bhnd_erom_probe_driver_classes()
162  * @param eio		The bus I/O callbacks to use when reading the device
166  * @retval non-NULL	success
181 		printf("error initializing %s parser at %#jx: %d\n", cls->name,  in bhnd_erom_alloc()
182 		    (uintmax_t)cid->enum_addr, error);  in bhnd_erom_alloc()
194  * This may be used to initialize a caller-allocated erom instance state
204  * @param eio		The bus I/O callbacks to use when reading the device
209  * @retval non-zero	if an error occurs initializing the EROM parser,
221 	if (kcls->size > esize)  in bhnd_erom_init_static()
260  * @param	eio		A bus I/O instance, configured with a mapping
286 	cid->chip_id = CHIPC_GET_BITS(idreg, CHIPC_ID_CHIP);  in bhnd_erom_read_chipid()
287 	cid->chip_pkg = CHIPC_GET_BITS(idreg, CHIPC_ID_PKG);  in bhnd_erom_read_chipid()
288 	cid->chip_rev = CHIPC_GET_BITS(idreg, CHIPC_ID_REV);  in bhnd_erom_read_chipid()
289 	cid->chip_type = CHIPC_GET_BITS(idreg, CHIPC_ID_BUS);  in bhnd_erom_read_chipid()
290 	cid->ncores = CHIPC_GET_BITS(idreg, CHIPC_ID_NUMCORE);  in bhnd_erom_read_chipid()
293 	if (BHND_CHIPTYPE_HAS_EROM(cid->chip_type)) {  in bhnd_erom_read_chipid()
294 		cid->enum_addr = bhnd_erom_io_read(eio, CHIPC_EROMPTR, 4);  in bhnd_erom_read_chipid()
296 		cid->enum_addr = cc_addr;  in bhnd_erom_read_chipid()
301 	cid->chip_caps = 0x0;  in bhnd_erom_read_chipid()
304 		cid->chip_caps |= BHND_CAP_BP64;  in bhnd_erom_read_chipid()
307 		cid->chip_caps |= BHND_CAP_PMU;  in bhnd_erom_read_chipid()
321  * @retval non-zero	if mapping @p addr otherwise fails, a regular
327 	return (eio->map(eio, addr, size));  in bhnd_erom_io_map()
344 	return (eio->tell(eio, addr, size));  in bhnd_erom_io_tell()
353  * @param width		item width (1, 2, or 4 bytes).
356 bhnd_erom_io_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)  in bhnd_erom_io_read()  argument
358 	return (eio->read(eio, offset, width));  in bhnd_erom_io_read()
367 	if (eio->fini != NULL)  in bhnd_erom_io_fini()
368 		return (eio->fini(eio));  in bhnd_erom_io_fini()
385 	iores->eio.map = bhnd_erom_iores_map;  in bhnd_erom_iores_new()
386 	iores->eio.tell = bhnd_erom_iores_tell;  in bhnd_erom_iores_new()
387 	iores->eio.read = bhnd_erom_iores_read;  in bhnd_erom_iores_new()
388 	iores->eio.fini = bhnd_erom_iores_fini;  in bhnd_erom_iores_new()
390 	iores->owner = dev;  in bhnd_erom_iores_new()
391 	iores->owner_rid = rid;  in bhnd_erom_iores_new()
392 	iores->mapped = NULL;  in bhnd_erom_iores_new()
393 	iores->mapped_rid = -1;  in bhnd_erom_iores_new()
395 	return (&iores->eio);  in bhnd_erom_iores_new()
410 	if (BHND_ADDR_MAX - size < addr)  in bhnd_erom_iores_map()
414 	if (iores->mapped) {  in bhnd_erom_iores_map()
416 		if (rman_get_start(iores->mapped->res) == addr &&  in bhnd_erom_iores_map()
417 		    rman_get_size(iores->mapped->res) == size)  in bhnd_erom_iores_map()
423 		bhnd_release_resource(iores->owner, SYS_RES_MEMORY,  in bhnd_erom_iores_map()
424 		    iores->mapped_rid, iores->mapped);  in bhnd_erom_iores_map()
425 		iores->mapped = NULL;  in bhnd_erom_iores_map()
426 		iores->mapped_rid = -1;  in bhnd_erom_iores_map()
430 	iores->mapped_rid = iores->owner_rid;  in bhnd_erom_iores_map()
431 	iores->mapped = bhnd_alloc_resource(iores->owner, SYS_RES_MEMORY,  in bhnd_erom_iores_map()
432 	    &iores->mapped_rid, addr, addr+size-1, size,  in bhnd_erom_iores_map()
434 	if (iores->mapped == NULL) {  in bhnd_erom_iores_map()
435 		iores->mapped_rid = -1;  in bhnd_erom_iores_map()
448 	if (iores->mapped == NULL)  in bhnd_erom_iores_tell()
451 	*addr = rman_get_start(iores->mapped->res);  in bhnd_erom_iores_tell()
452 	*size = rman_get_size(iores->mapped->res);  in bhnd_erom_iores_tell()
458 bhnd_erom_iores_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)  in bhnd_erom_iores_read()  argument
462 	if (iores->mapped == NULL)  in bhnd_erom_iores_read()
465 	switch (width) {  in bhnd_erom_iores_read()
467 		return (bhnd_bus_read_1(iores->mapped, offset));  in bhnd_erom_iores_read()
469 		return (bhnd_bus_read_2(iores->mapped, offset));  in bhnd_erom_iores_read()
471 		return (bhnd_bus_read_4(iores->mapped, offset));  in bhnd_erom_iores_read()
473 		panic("invalid width %u", width);  in bhnd_erom_iores_read()
483 	if (iores->mapped) {  in bhnd_erom_iores_fini()
484 		bhnd_release_resource(iores->owner, SYS_RES_MEMORY,  in bhnd_erom_iores_fini()
485 		    iores->mapped_rid, iores->mapped);  in bhnd_erom_iores_fini()
486 		iores->mapped = NULL;  in bhnd_erom_iores_fini()
487 		iores->mapped_rid = -1;  in bhnd_erom_iores_fini()
495  * given bus space tag and handle.
500  * @param bst	Bus space tag for @p bsh.
501  * @param bsh	Bus space handle mapping the full bus enumeration space.
504  * @retval non-zero	if initializing @p iobus otherwise fails, a regular
511 	iobus->eio.map = bhnd_erom_iobus_map;  in bhnd_erom_iobus_init()
512 	iobus->eio.tell = bhnd_erom_iobus_tell;  in bhnd_erom_iobus_init()
513 	iobus->eio.read = bhnd_erom_iobus_read;  in bhnd_erom_iobus_init()
514 	iobus->eio.fini = NULL;  in bhnd_erom_iobus_init()
516 	iobus->addr = addr;  in bhnd_erom_iobus_init()
517 	iobus->size = size;  in bhnd_erom_iobus_init()
518 	iobus->bst = bst;  in bhnd_erom_iobus_init()
519 	iobus->bsh = bsh;  in bhnd_erom_iobus_init()
520 	iobus->mapped = false;  in bhnd_erom_iobus_init()
536 	if (BHND_ADDR_MAX - size < addr)  in bhnd_erom_iobus_map()
539 	/* addr/size must fit within our bus tag's mapping */  in bhnd_erom_iobus_map()
540 	if (addr < iobus->addr || size > iobus->size)  in bhnd_erom_iobus_map()
543 	if (iobus->size - (addr - iobus->addr) < size)  in bhnd_erom_iobus_map()
547 	if ((addr - iobus->addr) > BUS_SPACE_MAXSIZE)  in bhnd_erom_iobus_map()
553 	iobus->offset = addr - iobus->addr;  in bhnd_erom_iobus_map()
554 	iobus->limit = size;  in bhnd_erom_iobus_map()
555 	iobus->mapped = true;  in bhnd_erom_iobus_map()
566 	if (!iobus->mapped)  in bhnd_erom_iobus_tell()
569 	*addr = iobus->addr + iobus->offset;  in bhnd_erom_iobus_tell()
570 	*size = iobus->limit;  in bhnd_erom_iobus_tell()
576 bhnd_erom_iobus_read(struct bhnd_erom_io *eio, bhnd_size_t offset, u_int width)  in bhnd_erom_iobus_read()  argument
580 	if (!iobus->mapped)   in bhnd_erom_iobus_read()
583 	if (iobus->limit < width || iobus->limit - width < offset)  in bhnd_erom_iobus_read()
586 	switch (width) {  in bhnd_erom_iobus_read()
588 		return (bus_space_read_1(iobus->bst, iobus->bsh,  in bhnd_erom_iobus_read()
589 		    iobus->offset + offset));  in bhnd_erom_iobus_read()
591 		return (bus_space_read_2(iobus->bst, iobus->bsh,  in bhnd_erom_iobus_read()
592 		    iobus->offset + offset));  in bhnd_erom_iobus_read()
594 		return (bus_space_read_4(iobus->bst, iobus->bsh,  in bhnd_erom_iobus_read()
595 		    iobus->offset + offset));  in bhnd_erom_iobus_read()
597 		panic("invalid width %u", width);  in bhnd_erom_iobus_read()