diff --git a/sys/riscv/riscv/nexus.c b/sys/riscv/riscv/nexus.c index d92ad7861ae9..f710e6826c21 100644 --- a/sys/riscv/riscv/nexus.c +++ b/sys/riscv/riscv/nexus.c @@ -1,492 +1,436 @@ /*- * Copyright 1998 Massachusetts Institute of Technology * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that both the above copyright notice and this * permission notice appear in all copies, that both the above * copyright notice and this permission notice appear in all * supporting documentation, and that the name of M.I.T. not be used * in advertising or publicity pertaining to distribution of the * software without specific, written prior permission. M.I.T. makes * no representations about the suitability of this software for any * purpose. It is provided "as is" without express or implied * warranty. * * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ /* * This code implements a `root nexus' for RISC-V Architecture * machines. The function of the root nexus is to serve as an * attachment point for both processors and buses, and to manage * resources which are common to all of them. In particular, * this code implements the core resource managers for interrupt * requests and I/O memory address space. */ #include "opt_platform.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef FDT #include #include #include "ofw_bus_if.h" #endif extern struct bus_space memmap_bus; static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); struct nexus_device { struct resource_list nx_resources; }; #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) static struct rman mem_rman; static struct rman irq_rman; static device_probe_t nexus_fdt_probe; static device_attach_t nexus_attach; static bus_add_child_t nexus_add_child; static bus_print_child_t nexus_print_child; static bus_activate_resource_t nexus_activate_resource; -static bus_adjust_resource_t nexus_adjust_resource; static bus_alloc_resource_t nexus_alloc_resource; static bus_deactivate_resource_t nexus_deactivate_resource; static bus_get_resource_list_t nexus_get_reslist; +static bus_get_rman_t nexus_get_rman; static bus_map_resource_t nexus_map_resource; -static bus_release_resource_t nexus_release_resource; static bus_unmap_resource_t nexus_unmap_resource; static bus_config_intr_t nexus_config_intr; static bus_describe_intr_t nexus_describe_intr; static bus_setup_intr_t nexus_setup_intr; static bus_teardown_intr_t nexus_teardown_intr; static bus_get_bus_tag_t nexus_get_bus_tag; static ofw_bus_map_intr_t nexus_ofw_map_intr; static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_probe, nexus_fdt_probe), DEVMETHOD(device_attach, nexus_attach), /* OFW interface */ DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), /* Bus interface */ DEVMETHOD(bus_add_child, nexus_add_child), DEVMETHOD(bus_print_child, nexus_print_child), DEVMETHOD(bus_activate_resource, nexus_activate_resource), - DEVMETHOD(bus_adjust_resource, nexus_adjust_resource), + DEVMETHOD(bus_adjust_resource, bus_generic_rman_adjust_resource), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), DEVMETHOD(bus_delete_resource, bus_generic_rl_delete_resource), DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), DEVMETHOD(bus_get_resource_list, nexus_get_reslist), + DEVMETHOD(bus_get_rman, nexus_get_rman), DEVMETHOD(bus_map_resource, nexus_map_resource), DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), - DEVMETHOD(bus_release_resource, nexus_release_resource), + DEVMETHOD(bus_release_resource, bus_generic_rman_release_resource), DEVMETHOD(bus_unmap_resource, nexus_unmap_resource), DEVMETHOD(bus_config_intr, nexus_config_intr), DEVMETHOD(bus_describe_intr, nexus_describe_intr), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), DEVMETHOD_END }; static driver_t nexus_fdt_driver = { "nexus", nexus_methods, 1 /* no softc */ }; EARLY_DRIVER_MODULE(nexus_fdt, root, nexus_fdt_driver, 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_FIRST); static int nexus_fdt_probe(device_t dev) { device_quiet(dev); return (BUS_PROBE_DEFAULT); } static int nexus_attach(device_t dev) { mem_rman.rm_start = 0; mem_rman.rm_end = BUS_SPACE_MAXADDR; mem_rman.rm_type = RMAN_ARRAY; mem_rman.rm_descr = "I/O memory addresses"; if (rman_init(&mem_rman) || rman_manage_region(&mem_rman, 0, BUS_SPACE_MAXADDR)) panic("nexus_attach mem_rman"); irq_rman.rm_start = 0; irq_rman.rm_end = ~0; irq_rman.rm_type = RMAN_ARRAY; irq_rman.rm_descr = "Interrupts"; if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, 0, ~0)) panic("nexus_attach irq_rman"); /* * Add direct children of nexus. Devices will be probed and attached * through ofwbus0. */ nexus_add_child(dev, 0, "timer", 0); nexus_add_child(dev, 1, "rcons", 0); nexus_add_child(dev, 2, "ofwbus", 0); bus_generic_probe(dev); bus_generic_attach(dev); return (0); } static int nexus_print_child(device_t bus, device_t child) { int retval = 0; retval += bus_print_child_header(bus, child); retval += printf("\n"); return (retval); } static device_t nexus_add_child(device_t bus, u_int order, const char *name, int unit) { device_t child; struct nexus_device *ndev; ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); if (!ndev) return (0); resource_list_init(&ndev->nx_resources); child = device_add_child_ordered(bus, order, name, unit); device_set_ivars(child, ndev); return (child); } +static struct rman * +nexus_get_rman(device_t bus, int type, u_int flags) +{ + + switch (type) { + case SYS_RES_IRQ: + return (&irq_rman); + case SYS_RES_MEMORY: + case SYS_RES_IOPORT: + return (&mem_rman); + default: + return (NULL); + } +} + /* * Allocate a resource on behalf of child. NB: child is usually going to be a * child of one of our descendants, not a direct child of nexus0. */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) { struct nexus_device *ndev = DEVTONX(child); - struct resource *rv; struct resource_list_entry *rle; - struct rman *rm; - int needactivate = flags & RF_ACTIVE; /* * If this is an allocation of the "default" range for a given * RID, and we know what the resources for this device are * (ie. they aren't maintained by a child bus), then work out * the start/end values. */ if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) { if (device_get_parent(child) != bus || ndev == NULL) return (NULL); rle = resource_list_find(&ndev->nx_resources, type, *rid); if (rle == NULL) return (NULL); start = rle->start; end = rle->end; count = rle->count; } - switch (type) { - case SYS_RES_IRQ: - rm = &irq_rman; - break; - - case SYS_RES_MEMORY: - case SYS_RES_IOPORT: - rm = &mem_rman; - break; - - default: - return (NULL); - } - - rv = rman_reserve_resource(rm, start, end, count, flags, child); - if (rv == NULL) - return (NULL); - - rman_set_rid(rv, *rid); - rman_set_bushandle(rv, rman_get_start(rv)); - - if (needactivate) { - if (bus_activate_resource(child, type, *rid, rv)) { - rman_release_resource(rv); - return (NULL); - } - } - - return (rv); -} - -static int -nexus_adjust_resource(device_t bus __unused, device_t child __unused, int type, - struct resource *r, rman_res_t start, rman_res_t end) -{ - struct rman *rm; - - switch (type) { - case SYS_RES_IRQ: - rm = &irq_rman; - break; - case SYS_RES_MEMORY: - rm = &mem_rman; - break; - default: - return (EINVAL); - } - if (rman_is_region_manager(r, rm) == 0) - return (EINVAL); - return (rman_adjust_resource(r, start, end)); -} - -static int -nexus_release_resource(device_t bus, device_t child, int type, int rid, - struct resource *res) -{ - int error; - - if (rman_get_flags(res) & RF_ACTIVE) { - error = bus_deactivate_resource(child, type, rid, res); - if (error != 0) - return (error); - } - return (rman_release_resource(res)); + return (bus_generic_rman_alloc_resource(bus, child, type, rid, + start, end, count, flags)); } static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, enum intr_polarity pol) { return (EOPNOTSUPP); } static int nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) { int error; if ((rman_get_flags(res) & RF_SHAREABLE) == 0) flags |= INTR_EXCL; /* We depend here on rman_activate_resource() being idempotent. */ error = rman_activate_resource(res); if (error != 0) return (error); error = intr_setup_irq(child, res, filt, intr, arg, flags, cookiep); return (error); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) { return (intr_teardown_irq(child, r, ih)); } static int nexus_describe_intr(device_t dev, device_t child, struct resource *irq, void *cookie, const char *descr) { return (intr_describe_irq(child, irq, cookie, descr)); } static bus_space_tag_t nexus_get_bus_tag(device_t bus __unused, device_t child __unused) { return (&memmap_bus); } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { - struct resource_map map; - int err; - - if ((err = rman_activate_resource(r)) != 0) - return (err); + int error; - /* - * If this is a memory resource, map it into the kernel. - */ switch (type) { case SYS_RES_IOPORT: case SYS_RES_MEMORY: - if ((rman_get_flags(r) & RF_UNMAPPED) == 0) { - err = nexus_map_resource(bus, child, type, r, NULL, - &map); - if (err != 0) { - rman_deactivate_resource(r); - return (err); - } - - rman_set_mapping(r, &map); - } + error = bus_generic_rman_activate_resource(bus, child, type, + rid, r); break; case SYS_RES_IRQ: - err = intr_activate_irq(child, r); - if (err != 0) { + error = rman_activate_resource(r); + if (error != 0) + return (error); + error = intr_activate_irq(child, r); + if (error != 0) { rman_deactivate_resource(r); - return (err); + return (error); } + break; + default: + error = EINVAL; + break; } - return (0); + return (error); } static struct resource_list * nexus_get_reslist(device_t dev, device_t child) { struct nexus_device *ndev = DEVTONX(child); return (&ndev->nx_resources); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { - bus_size_t psize; - bus_space_handle_t vaddr; - - if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { - psize = (bus_size_t)rman_get_size(r); - vaddr = rman_get_bushandle(r); + int error; - if (vaddr != 0) { - bus_space_unmap(&memmap_bus, vaddr, psize); - rman_set_virtual(r, NULL); - rman_set_bushandle(r, 0); - } - } else if (type == SYS_RES_IRQ) { + switch (type) { + case SYS_RES_IOPORT: + case SYS_RES_MEMORY: + error = bus_generic_rman_deactivate_resource(bus, child, type, + rid, r); + break; + case SYS_RES_IRQ: + error = rman_deactivate_resource(r); + if (error != 0) + return (error); intr_deactivate_irq(child, r); + break; + default: + error = EINVAL; + break; } - - return (rman_deactivate_resource(r)); + return (error); } static int nexus_map_resource(device_t bus, device_t child, int type, struct resource *r, struct resource_map_request *argsp, struct resource_map *map) { struct resource_map_request args; rman_res_t length, start; int error; /* Resources must be active to be mapped. */ if ((rman_get_flags(r) & RF_ACTIVE) == 0) return (ENXIO); /* Mappings are only supported on I/O and memory resources. */ switch (type) { case SYS_RES_IOPORT: case SYS_RES_MEMORY: break; default: return (EINVAL); } resource_init_map_request(&args); error = resource_validate_map_request(r, argsp, &args, &start, &length); if (error) return (error); map->r_vaddr = pmap_mapdev(start, length); map->r_bustag = &memmap_bus; map->r_size = length; /* * The handle is the virtual address. */ map->r_bushandle = (bus_space_handle_t)map->r_vaddr; return (0); } static int nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r, struct resource_map *map) { switch (type) { case SYS_RES_MEMORY: case SYS_RES_IOPORT: pmap_unmapdev(map->r_vaddr, map->r_size); return (0); default: return (EINVAL); } } static int nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, pcell_t *intr) { struct intr_map_data_fdt *fdt_data; size_t len; u_int irq; len = sizeof(*fdt_data) + icells * sizeof(pcell_t); fdt_data = (struct intr_map_data_fdt *)intr_alloc_map_data( INTR_MAP_DATA_FDT, len, M_WAITOK | M_ZERO); fdt_data->iparent = iparent; fdt_data->ncells = icells; memcpy(fdt_data->cells, intr, icells * sizeof(pcell_t)); irq = intr_map_irq(NULL, iparent, (struct intr_map_data *)fdt_data); return (irq); }