1 /* $NetBSD: vrdsu.c,v 1.11 2012/10/27 17:17:56 chs Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Shin Takemura All rights reserved. 5 * Copyright (c) 1999 PocketBSD Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: vrdsu.c,v 1.11 2012/10/27 17:17:56 chs Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/device.h> 35 #include <uvm/uvm_param.h> 36 37 #include <machine/bus.h> 38 39 #include <hpcmips/vr/vripif.h> 40 #include <hpcmips/vr/dsureg.h> 41 #include <hpcmips/vr/vrdsuvar.h> 42 43 struct vrdsu_softc { 44 bus_space_tag_t sc_iot; 45 bus_space_handle_t sc_ioh; 46 }; 47 48 static int vrdsumatch(device_t, cfdata_t, void *); 49 static void vrdsuattach(device_t, device_t, void *); 50 51 static void vrdsu_write(struct vrdsu_softc *, int, unsigned short); 52 static unsigned short vrdsu_read(struct vrdsu_softc *, int); 53 54 CFATTACH_DECL_NEW(vrdsu, sizeof(struct vrdsu_softc), 55 vrdsumatch, vrdsuattach, NULL, NULL); 56 57 struct vrdsu_softc *the_dsu_sc = NULL; 58 59 static inline void 60 vrdsu_write(struct vrdsu_softc *sc, int port, unsigned short val) 61 { 62 63 bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val); 64 } 65 66 static inline unsigned short 67 vrdsu_read(struct vrdsu_softc *sc, int port) 68 { 69 70 return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port)); 71 } 72 73 static int 74 vrdsumatch(device_t parent, cfdata_t cf, void *aux) 75 { 76 77 return (1); 78 } 79 80 static void 81 vrdsuattach(device_t parent, device_t self, void *aux) 82 { 83 struct vrdsu_softc *sc = device_private(self); 84 struct vrip_attach_args *va = aux; 85 86 sc->sc_iot = va->va_iot; 87 if (bus_space_map(va->va_iot, va->va_addr, va->va_size, 88 0, &sc->sc_ioh)) { 89 printf(": can't map bus space\n"); 90 return; 91 } 92 printf("\n"); 93 the_dsu_sc = sc; 94 } 95 96 void 97 vrdsu_reset(void) 98 { 99 100 if (the_dsu_sc) { 101 splhigh(); 102 vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */ 103 vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN); 104 /* 105 * wipe out all physical memory for clean WinCE boot. 106 */ 107 memset((void *)MIPS_PHYS_TO_KSEG1(0), 0, ptoa(physmem) - 0); 108 while (1); 109 } else { 110 printf("%s(%d): There is no DSU.", __FILE__, __LINE__); 111 } 112 } 113