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Annotation of sys/arch/sparc64/dev/bbc.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: bbc.c,v 1.1 2007/04/10 19:05:52 kettenis Exp $        */
                      2:
                      3: /*
                      4:  * Copyright (c) 2007 Mark Kettenis
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18:
                     19: #include <sys/param.h>
                     20: #include <sys/kernel.h>
                     21: #include <sys/device.h>
                     22: #include <sys/malloc.h>
                     23: #include <sys/systm.h>
                     24:
                     25: #include <machine/bus.h>
                     26: #include <machine/autoconf.h>
                     27:
                     28: #include <sparc64/dev/ebusreg.h>
                     29: #include <sparc64/dev/ebusvar.h>
                     30:
                     31: /* Watchdog Action */
                     32: #define BBC_WATCHDOG_ACTION    0x00004
                     33:
                     34: /* Perform system reset when watchdog timer expires. */
                     35: #define        BBC_WATCHDOG_RESET      0x01
                     36:
                     37: struct bbc_softc {
                     38:        struct device           sc_dv;
                     39:        bus_space_tag_t         sc_iot;
                     40:        bus_space_handle_t      sc_ioh;
                     41: };
                     42:
                     43: int    bbc_match(struct device *, void *, void *);
                     44: void   bbc_attach(struct device *, struct device *, void *);
                     45:
                     46: struct cfattach bbc_ca = {
                     47:        sizeof(struct bbc_softc), bbc_match, bbc_attach
                     48: };
                     49:
                     50: struct cfdriver bbc_cd = {
                     51:        NULL, "bbc", DV_DULL
                     52: };
                     53:
                     54: int
                     55: bbc_match(struct device *parent, void *cf, void *aux)
                     56: {
                     57:        struct ebus_attach_args *ea = aux;
                     58:
                     59:        if (strcmp("bbc", ea->ea_name) == 0)
                     60:                return (1);
                     61:        return (0);
                     62: }
                     63:
                     64: void
                     65: bbc_attach(struct device *parent, struct device *self, void *aux)
                     66: {
                     67:        struct bbc_softc *sc = (void *)self;
                     68:        struct ebus_attach_args *ea = aux;
                     69:
                     70:        /* Use prom address if available, otherwise map it. */
                     71:        if (ea->ea_nvaddrs) {
                     72:                if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
                     73:                    BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) {
                     74:                        printf(": can't map PROM register space\n");
                     75:                        return;
                     76:                }
                     77:                sc->sc_iot = ea->ea_memtag;
                     78:        } else if (ebus_bus_map(ea->ea_iotag, 0,
                     79:            EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
                     80:            ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
                     81:                sc->sc_iot = ea->ea_iotag;
                     82:        } else if (ebus_bus_map(ea->ea_memtag, 0,
                     83:            EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
                     84:            ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
                     85:                sc->sc_iot = ea->ea_memtag;
                     86:        } else {
                     87:                printf("%s: can't map register space\n", self->dv_xname);
                     88:                return;
                     89:        }
                     90:
                     91:        printf("\n");
                     92:
                     93:        /*
                     94:         * Make sure we actually reset the system when the watchdog
                     95:         * timer expires.
                     96:         */
                     97:        bus_space_write_1(sc->sc_iot, sc->sc_ioh,
                     98:            BBC_WATCHDOG_ACTION, BBC_WATCHDOG_RESET);
                     99: }