/* $OpenBSD: mainbus.c,v 1.14 2004/11/09 15:02:23 miod Exp $ */ /* * Copyright (c) 1998 Steve Murphree, Jr. * Copyright (c) 2004, Miodrag Vallat. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef MVME188 #include #endif #if defined(MVME187) || defined(MVME197) #include #endif void mainbus_attach(struct device *, struct device *, void *); int mainbus_match(struct device *, void *, void *); int mainbus_print(void *, const char *); int mainbus_scan(struct device *, void *, void *); /* * bus_space routines for 1:1 obio mappings */ int mainbus_map(bus_addr_t, bus_size_t, int, bus_space_handle_t *); void mainbus_unmap(bus_space_handle_t, bus_size_t); int mainbus_subregion(bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *); void *mainbus_vaddr(bus_space_handle_t); const struct mvme88k_bus_space_tag mainbus_bustag = { mainbus_map, mainbus_unmap, mainbus_subregion, mainbus_vaddr }; extern struct extent *iomap_extent; extern struct vm_map *iomap_map; void *mapiodev(void *, int); void unmapiodev(void *, int); /* * Obio (internal IO) space is mapped 1:1 (see pmap_bootstrap() for details). * * However, sram attaches as a child of mainbus, but does not reside in * internal IO space. As a result, we have to allow both 1:1 and iomap * translations, depending upon the address to map. */ int mainbus_map(bus_addr_t addr, bus_size_t size, int flags, bus_space_handle_t *ret) { vaddr_t map; static bus_addr_t threshold = 0; if (threshold == 0) { switch (brdtyp) { #ifdef MVME188 case BRD_188: threshold = MVME188_UTILITY; break; #endif #ifdef MVME187 case BRD_187: case BRD_8120: #endif #ifdef MVME197 case BRD_197: #endif threshold = OBIO_START; break; } } if (addr >= threshold) map = (vaddr_t)addr; else { map = (vaddr_t)mapiodev((void *)addr, size); } if (map == NULL) return ENOMEM; *ret = (bus_space_handle_t)map; return 0; } void mainbus_unmap(bus_space_handle_t handle, bus_size_t size) { /* XXX what to do for non-obio mappings? */ } int mainbus_subregion(bus_space_handle_t handle, bus_addr_t offset, bus_size_t size, bus_space_handle_t *ret) { *ret = handle + offset; return (0); } void * mainbus_vaddr(bus_space_handle_t handle) { return (void *)handle; } /* * Map a range [pa, pa+size] in the given map to a kernel address * in iomap space. * * Note: To be flexible, I did not put a restriction on the alignment * of pa. However, it is advisable to have pa page aligned since otherwise, * we might have several mappings for a given chunk of the IO page. */ void * mapiodev(pa, size) void *pa; int size; { vaddr_t iova, tva, off; paddr_t ppa; int s, error; if (size <= 0) return NULL; ppa = trunc_page((paddr_t)pa); off = (paddr_t)pa & PGOFSET; size = round_page(off + size); s = splhigh(); error = extent_alloc(iomap_extent, size, PAGE_SIZE, 0, EX_NOBOUNDARY, EX_WAITSPACE, &iova); splx(s); if (error != 0) return NULL; cmmu_flush_tlb(cpu_number(), 1, iova, size); /* necessary? */ tva = iova; while (size != 0) { pmap_enter(vm_map_pmap(iomap_map), tva, ppa, VM_PROT_WRITE | VM_PROT_READ, VM_PROT_WRITE | VM_PROT_READ | PMAP_WIRED); size -= PAGE_SIZE; tva += PAGE_SIZE; ppa += PAGE_SIZE; } pmap_update(vm_map_pmap(iomap_map)); return (void *)(iova + off); } /* * Free up the mapping in iomap. */ void unmapiodev(va, size) void *va; int size; { vaddr_t kva, off; int s, error; off = (vaddr_t)va & PGOFSET; kva = trunc_page((vaddr_t)va); size = round_page(off + size); pmap_remove(vm_map_pmap(iomap_map), kva, kva + size); pmap_update(vm_map_pmap(iomap_map)); s = splhigh(); error = extent_free(iomap_extent, kva, size, EX_NOWAIT); #ifdef DIAGNOSTIC if (error != 0) printf("unmapiodev: extent_free failed\n"); #endif splx(s); } /* * Configuration glue */ struct cfattach mainbus_ca = { sizeof(struct device), mainbus_match, mainbus_attach }; struct cfdriver mainbus_cd = { NULL, "mainbus", DV_DULL }; int mainbus_match(parent, cf, args) struct device *parent; void *cf; void *args; { return (1); } int mainbus_print(args, bus) void *args; const char *bus; { struct confargs *ca = args; if (ca->ca_paddr != -1) printf(" addr 0x%x", ca->ca_paddr); return (UNCONF); } int mainbus_scan(parent, child, args) struct device *parent; void *child, *args; { struct cfdata *cf = child; struct confargs oca; bzero(&oca, sizeof oca); oca.ca_iot = &mainbus_bustag; oca.ca_dmat = 0; /* XXX no need for a meaningful value yet */ oca.ca_bustype = BUS_MAIN; oca.ca_paddr = cf->cf_loc[0]; oca.ca_ipl = -1; oca.ca_name = cf->cf_driver->cd_name; if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0) return (0); config_attach(parent, cf, &oca, mainbus_print); return (1); } void mainbus_attach(parent, self, args) struct device *parent, *self; void *args; { extern char cpu_model[]; printf(": %s\n", cpu_model); /* * Display cpu/mmu details. Only for the master CPU so far. */ cpu_configuration_print(1); /* XXX * should have a please-attach-first list for mainbus, * to ensure that the pcc/vme2/mcc chips are attached * first. */ (void)config_search(mainbus_scan, self, args); }