111 lines
3.2 KiB
C
111 lines
3.2 KiB
C
/* $NetBSD: vrdsu.c,v 1.7 2002/11/24 06:02:24 shin Exp $ */
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/*
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* Copyright (c) 1999 Shin Takemura All rights reserved.
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* Copyright (c) 1999 PocketBSD Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <uvm/uvm_param.h>
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#include <machine/bus.h>
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#include <hpcmips/vr/vripif.h>
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#include <hpcmips/vr/dsureg.h>
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#include <hpcmips/vr/vrdsuvar.h>
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struct vrdsu_softc {
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struct device sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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};
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static int vrdsumatch(struct device *, struct cfdata *, void *);
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static void vrdsuattach(struct device *, struct device *, void *);
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static void vrdsu_write(struct vrdsu_softc *, int, unsigned short);
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static unsigned short vrdsu_read(struct vrdsu_softc *, int);
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CFATTACH_DECL(vrdsu, sizeof(struct vrdsu_softc),
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vrdsumatch, vrdsuattach, NULL, NULL);
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struct vrdsu_softc *the_dsu_sc = NULL;
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static inline void
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vrdsu_write(struct vrdsu_softc *sc, int port, unsigned short val)
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{
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bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
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}
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static inline unsigned short
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vrdsu_read(struct vrdsu_softc *sc, int port)
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{
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return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
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}
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static int
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vrdsumatch(struct device *parent, struct cfdata *cf, void *aux)
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{
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return (1);
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}
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static void
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vrdsuattach(struct device *parent, struct device *self, void *aux)
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{
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struct vrdsu_softc *sc = (struct vrdsu_softc *)self;
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struct vrip_attach_args *va = aux;
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sc->sc_iot = va->va_iot;
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if (bus_space_map(va->va_iot, va->va_addr, va->va_size,
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0, &sc->sc_ioh)) {
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printf(": can't map bus space\n");
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return;
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}
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printf("\n");
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the_dsu_sc = sc;
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}
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void
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vrdsu_reset()
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{
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if (the_dsu_sc) {
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splhigh();
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vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */
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vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN);
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/*
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* wipe out all physical memory for clean WinCE boot.
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*/
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memset((void *)MIPS_PHYS_TO_KSEG1(0), 0, ptoa(physmem) - 0);
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while (1);
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} else {
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printf("%s(%d): There is no DSU.", __FILE__, __LINE__);
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}
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}
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