/* * 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. * * $FreeBSD: src/sys/i386/i386/nexus.c,v 1.26.2.10 2003/02/22 13:16:45 imp Exp $ * $DragonFly: src/sys/i386/i386/Attic/nexus.c,v 1.11 2004/10/14 03:05:52 dillon Exp $ */ /* * This code implements a `root nexus' for Intel 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, DMA requests (which rightfully should be a part of the * ISA code but it's easier to do it here for now), I/O port addresses, * and I/O memory address space. */ #include "use_mca.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef APIC_IO #include #include #endif #include #ifdef PC98 #include #else #include #endif #include static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); struct nexus_device { struct resource_list nx_resources; int nx_pcibus; }; #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) static struct rman irq_rman, drq_rman, port_rman, mem_rman; static void nexus_identify(driver_t *, device_t); static int nexus_probe(device_t); static int nexus_attach(device_t); static int nexus_print_all_resources(device_t dev); static int nexus_print_child(device_t, device_t); static device_t nexus_add_child(device_t bus, int order, const char *name, int unit); static struct resource *nexus_alloc_resource(device_t, device_t, int, int *, u_long, u_long, u_long, u_int); static int nexus_read_ivar(device_t, device_t, int, uintptr_t *); static int nexus_write_ivar(device_t, device_t, int, uintptr_t); static int nexus_activate_resource(device_t, device_t, int, int, struct resource *); static int nexus_deactivate_resource(device_t, device_t, int, int, struct resource *); static int nexus_release_resource(device_t, device_t, int, int, struct resource *); static int nexus_setup_intr(device_t, device_t, struct resource *, int flags, void (*)(void *), void *, void **); static int nexus_teardown_intr(device_t, device_t, struct resource *, void *); static int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); static int nexus_get_resource(device_t, device_t, int, int, u_long *, u_long *); static void nexus_delete_resource(device_t, device_t, int, int); static device_method_t nexus_methods[] = { /* Device interface */ DEVMETHOD(device_identify, nexus_identify), DEVMETHOD(device_probe, nexus_probe), DEVMETHOD(device_attach, nexus_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), /* Bus interface */ DEVMETHOD(bus_print_child, nexus_print_child), DEVMETHOD(bus_add_child, nexus_add_child), DEVMETHOD(bus_read_ivar, nexus_read_ivar), DEVMETHOD(bus_write_ivar, nexus_write_ivar), DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), DEVMETHOD(bus_release_resource, nexus_release_resource), DEVMETHOD(bus_activate_resource, nexus_activate_resource), DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), DEVMETHOD(bus_setup_intr, nexus_setup_intr), DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), DEVMETHOD(bus_set_resource, nexus_set_resource), DEVMETHOD(bus_get_resource, nexus_get_resource), DEVMETHOD(bus_delete_resource, nexus_delete_resource), { 0, 0 } }; static driver_t nexus_driver = { "nexus", nexus_methods, 1, /* no softc */ }; static devclass_t nexus_devclass; DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); static void nexus_identify(driver_t *driver, device_t parent) { /* * Add child device with order of 1 so it gets probed * after ACPI (which is at order 0. */ if (BUS_ADD_CHILD(parent, 1, "legacy", 0) == NULL) panic("legacy: could not attach"); } static int nexus_probe(device_t dev) { #if 0 /* FUTURE */ device_t acpi; #endif #if 0 /* FUTURE */ /* * Fail to probe if ACPI is ok. */ acpi = devclass_get_device(devclass_find("acpi"), 0); if (acpi != NULL && device_is_alive(acpi)) return(ENXIO); #endif device_quiet(dev); /* suppress attach message for neatness */ /* * IRQ's are on the mainboard on old systems, but on the ISA part * of PCI->ISA bridges. There would be multiple sets of IRQs on * multi-ISA-bus systems. PCI interrupts are routed to the ISA * component, so in a way, PCI can be a partial child of an ISA bus(!). * APIC interrupts are global though. * In the non-APIC case, disallow the use of IRQ 2. */ irq_rman.rm_start = 0; irq_rman.rm_type = RMAN_ARRAY; irq_rman.rm_descr = "Interrupt request lines"; #ifdef APIC_IO irq_rman.rm_end = APIC_INTMAPSIZE - 1; if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end)) panic("nexus_probe irq_rman"); #else irq_rman.rm_end = 15; #ifdef PC98 if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end)) panic("nexus_probe irq_rman"); #else if (rman_init(&irq_rman) || rman_manage_region(&irq_rman, irq_rman.rm_start, 1) || rman_manage_region(&irq_rman, 3, irq_rman.rm_end)) panic("nexus_probe irq_rman"); #endif /* PC98 */ #endif /* * ISA DMA on PCI systems is implemented in the ISA part of each * PCI->ISA bridge and the channels can be duplicated if there are * multiple bridges. (eg: laptops with docking stations) */ drq_rman.rm_start = 0; #ifdef PC98 drq_rman.rm_end = 3; #else drq_rman.rm_end = 7; #endif drq_rman.rm_type = RMAN_ARRAY; drq_rman.rm_descr = "DMA request lines"; /* XXX drq 0 not available on some machines */ if (rman_init(&drq_rman) || rman_manage_region(&drq_rman, drq_rman.rm_start, drq_rman.rm_end)) panic("nexus_probe drq_rman"); /* * However, IO ports and Memory truely are global at this level, * as are APIC interrupts (however many IO APICS there turn out * to be on large systems..) */ port_rman.rm_start = 0; port_rman.rm_end = 0xffff; port_rman.rm_type = RMAN_ARRAY; port_rman.rm_descr = "I/O ports"; if (rman_init(&port_rman) || rman_manage_region(&port_rman, 0, 0xffff)) panic("nexus_probe port_rman"); mem_rman.rm_start = 0; mem_rman.rm_end = ~0u; 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, ~0)) panic("nexus_probe mem_rman"); return bus_generic_probe(dev); } static int nexus_attach(device_t dev) { device_t child; /* * First, let our child driver's identify any child devices that * they can find. Once that is done attach any devices that we * found. */ #if 0 /* FUTURE */ bus_generic_probe(dev); #endif bus_generic_attach(dev); /* * And if we didn't see EISA or ISA on a pci bridge, create some * connection points now so they show up "on motherboard". */ if (!devclass_get_device(devclass_find("eisa"), 0)) { child = BUS_ADD_CHILD(dev, 0, "eisa", 0); if (child == NULL) panic("nexus_attach eisa"); device_probe_and_attach(child); } #if NMCA > 0 if (!devclass_get_device(devclass_find("mca"), 0)) { child = BUS_ADD_CHILD(dev, 0, "mca", 0); if (child == NULL) panic("nexus_probe mca"); device_probe_and_attach(child); } #endif if (!devclass_get_device(devclass_find("isa"), 0)) { child = BUS_ADD_CHILD(dev, 0, "isa", 0); if (child == NULL) panic("nexus_attach isa"); device_probe_and_attach(child); } return 0; } static int nexus_print_all_resources(device_t dev) { struct nexus_device *ndev = DEVTONX(dev); struct resource_list *rl = &ndev->nx_resources; int retval = 0; if (SLIST_FIRST(rl) || ndev->nx_pcibus != -1) retval += printf(" at"); retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); return retval; } static int nexus_print_child(device_t bus, device_t child) { struct nexus_device *ndev = DEVTONX(child); int retval = 0; retval += bus_print_child_header(bus, child); retval += nexus_print_all_resources(child); if (ndev->nx_pcibus != -1) retval += printf(" pcibus %d", ndev->nx_pcibus); retval += printf(" on motherboard\n"); return (retval); } static device_t nexus_add_child(device_t bus, int order, const char *name, int unit) { device_t child; struct nexus_device *ndev; ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO); if (!ndev) return(0); resource_list_init(&ndev->nx_resources); ndev->nx_pcibus = -1; child = device_add_child_ordered(bus, order, name, unit); /* should we free this in nexus_child_detached? */ device_set_ivars(child, ndev); return(child); } static int nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) { struct nexus_device *ndev = DEVTONX(child); switch (which) { case NEXUS_IVAR_PCIBUS: *result = ndev->nx_pcibus; break; default: return ENOENT; } return 0; } static int nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) { struct nexus_device *ndev = DEVTONX(child); switch (which) { case NEXUS_IVAR_PCIBUS: ndev->nx_pcibus = value; break; default: return ENOENT; } return 0; } /* * 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. * (Exceptions include npx.) */ static struct resource * nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, u_long start, u_long end, u_long 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 ((start == 0UL) && (end == ~0UL) && (count == 1)) { if (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; } flags &= ~RF_ACTIVE; switch (type) { case SYS_RES_IRQ: rm = &irq_rman; break; case SYS_RES_DRQ: rm = &drq_rman; break; case SYS_RES_IOPORT: rm = &port_rman; break; case SYS_RES_MEMORY: rm = &mem_rman; break; default: return 0; } rv = rman_reserve_resource(rm, start, end, count, flags, child); if (rv == 0) return 0; if (type == SYS_RES_MEMORY) { rman_set_bustag(rv, I386_BUS_SPACE_MEM); } else if (type == SYS_RES_IOPORT) { rman_set_bustag(rv, I386_BUS_SPACE_IO); #ifndef PC98 rman_set_bushandle(rv, rv->r_start); #endif } #ifdef PC98 if ((type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) && i386_bus_space_handle_alloc(rv->r_bustag, rv->r_start, count, &rv->r_bushandle) != 0) { rman_release_resource(rv); return 0; } #endif if (needactivate) { if (bus_activate_resource(child, type, *rid, rv)) { #ifdef PC98 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { i386_bus_space_handle_free(rv->r_bustag, rv->r_bushandle, rv->r_bushandle->bsh_sz); } #endif rman_release_resource(rv); return 0; } } return rv; } static int nexus_activate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { /* * If this is a memory resource, map it into the kernel. */ if (rman_get_bustag(r) == I386_BUS_SPACE_MEM) { caddr_t vaddr = 0; if (rman_get_end(r) < 1024 * 1024) { /* * The first 1Mb is mapped at KERNBASE. */ vaddr = (caddr_t)(uintptr_t)(KERNBASE + rman_get_start(r)); } else { u_int32_t paddr; u_int32_t psize; u_int32_t poffs; paddr = rman_get_start(r); psize = rman_get_size(r); poffs = paddr - trunc_page(paddr); vaddr = (caddr_t) pmap_mapdev(paddr-poffs, psize+poffs) + poffs; } rman_set_virtual(r, vaddr); #ifdef PC98 /* PC-98: the type of bus_space_handle_t is the structure. */ r->r_bushandle->bsh_base = (bus_addr_t) vaddr; #else /* IBM-PC: the type of bus_space_handle_t is u_int */ rman_set_bushandle(r, (bus_space_handle_t) vaddr); #endif } return (rman_activate_resource(r)); } static int nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { /* * If this is a memory resource, unmap it. */ if ((rman_get_bustag(r) == I386_BUS_SPACE_MEM) && (rman_get_end(r) >= 1024 * 1024)) { u_int32_t psize; psize = rman_get_size(r); pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); } return (rman_deactivate_resource(r)); } static int nexus_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) { if (rman_get_flags(r) & RF_ACTIVE) { int error = bus_deactivate_resource(child, type, rid, r); if (error) return error; } #ifdef PC98 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { i386_bus_space_handle_free(r->r_bustag, r->r_bushandle, r->r_bushandle->bsh_sz); } #endif return (rman_release_resource(r)); } /* * Currently this uses the really grody interface from kern/kern_intr.c * (which really doesn't belong in kern/anything.c). Eventually, all of * the code in kern_intr.c and machdep_intr.c should get moved here, since * this is going to be the official interface. */ static int nexus_setup_intr(device_t bus, device_t child, struct resource *irq, int flags, void (*ihand)(void *), void *arg, void **cookiep) { intrmask_t *mask; driver_t *driver; int error, icflags; /* somebody tried to setup an irq that failed to allocate! */ if (irq == NULL) panic("nexus_setup_intr: NULL irq resource!"); *cookiep = 0; if (irq->r_flags & RF_SHAREABLE) icflags = 0; else icflags = INTR_EXCL; driver = device_get_driver(child); switch (flags & INTR_TYPE_MASK) { case INTR_TYPE_AV: case INTR_TYPE_TTY: mask = &tty_imask; break; case INTR_TYPE_BIO: mask = &bio_imask; break; case INTR_TYPE_NET: mask = &net_imask; break; case INTR_TYPE_CAM: mask = &cam_imask; break; case INTR_TYPE_CLK: mask = 0; printf("nexus: Warning: do not know what imask to use for INTR_TYPE_CLK\n"); break; case INTR_TYPE_MISC: mask = 0; break; default: panic("still using grody create_intr interface"); } if (flags & INTR_FAST) icflags |= INTR_FAST; /* * We depend here on rman_activate_resource() being idempotent. */ error = rman_activate_resource(irq); if (error) return (error); *cookiep = inthand_add(device_get_nameunit(child), irq->r_start, ihand, arg, mask, icflags); if (*cookiep == NULL) error = EINVAL; /* XXX ??? */ return (error); } static int nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) { return (inthand_remove(ih)); } static int nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; /* XXX this should return a success/failure indicator */ resource_list_add(rl, type, rid, start, start + count - 1, count); return(0); } static int nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; struct resource_list_entry *rle; rle = resource_list_find(rl, type, rid); device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", type, rid, startp, countp, rle); if (!rle) return(ENOENT); if (startp) *startp = rle->start; if (countp) *countp = rle->count; return(0); } static void nexus_delete_resource(device_t dev, device_t child, int type, int rid) { struct nexus_device *ndev = DEVTONX(child); struct resource_list *rl = &ndev->nx_resources; resource_list_delete(rl, type, rid); } /* * Placeholder which claims PnP 'devices' which describe system * resources. */ static struct isa_pnp_id sysresource_ids[] = { { 0x010cd041 /* PNP0c01 */, "System Memory" }, { 0x020cd041 /* PNP0c02 */, "System Resource" }, { 0 } }; static int sysresource_probe(device_t dev) { int result; if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) >= 0) { device_quiet(dev); } return (result); } static int sysresource_attach(device_t dev) { return (0); } static device_method_t sysresource_methods[] = { /* Device interface */ DEVMETHOD(device_probe, sysresource_probe), DEVMETHOD(device_attach, sysresource_attach), DEVMETHOD(device_detach, bus_generic_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), { 0, 0 } }; static driver_t sysresource_driver = { "sysresource", sysresource_methods, 1, /* no softc */ }; static devclass_t sysresource_devclass; DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0);