[src/trunk]: src/sys/arch/dreamcast/dev/g2 G2 bus support. Low level stuff b...

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d40d62dde286
branches:  trunk
changeset: 503105:d40d62dde286
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Wed Jan 31 18:33:24 2001 +0000

description:
G2 bus support.  Low level stuff by Marcus, bus_space stuff by me.

diffstat:

 sys/arch/dreamcast/dev/g2/g2bus.c         |   99 +++++++++++++++++
 sys/arch/dreamcast/dev/g2/g2bus_bus_mem.c |  170 ++++++++++++++++++++++++++++++
 sys/arch/dreamcast/dev/g2/g2busvar.h      |   68 ++++++++++++
 3 files changed, 337 insertions(+), 0 deletions(-)

diffs (truncated from 349 to 300 lines):

diff -r 1df6583943ef -r d40d62dde286 sys/arch/dreamcast/dev/g2/g2bus.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/dreamcast/dev/g2/g2bus.c Wed Jan 31 18:33:24 2001 +0000
@@ -0,0 +1,99 @@
+/*     $NetBSD: g2bus.c,v 1.1 2001/01/31 18:33:24 thorpej Exp $        */
+
+/*-
+ * Copyright (c) 2001 Marcus Comstedt
+ * All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by Marcus Comstedt.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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 <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/conf.h>
+#include <sys/malloc.h>
+#include <sys/device.h>
+#include <sys/proc.h>
+
+#include <dreamcast/dev/g2/g2busvar.h>
+
+int    g2busmatch(struct device *, struct cfdata *, void *);
+void   g2busattach(struct device *, struct device *, void *);
+int    g2busprint(void *, const char *);
+
+struct cfattach g2bus_ca = {
+       sizeof(struct g2bus_softc), g2busmatch, g2busattach
+};
+
+int    g2bussearch(struct device *, struct cfdata *, void *);
+
+int
+g2busmatch(struct device *parent, struct cfdata *cf, void *aux)
+{
+       struct shb_attach_args *sa = aux;
+
+       if (strcmp("g2bus", cf->cf_driver->cd_name))
+               return (0);
+
+       sa->ia_iosize = 0 /* */;
+        return (1);
+}
+
+void
+g2busattach(struct device *parent, struct device *self, void *aux)
+{
+       struct g2bus_softc *sc = (void *) self;
+       struct g2bus_attach_args ga;
+
+       printf("\n");
+
+       TAILQ_INIT(&sc->sc_subdevs);
+
+       g2bus_bus_mem_init(sc);
+
+       ga.ga_memt = &sc->sc_memt;
+
+       config_search(g2bussearch, self, &ga);
+}
+
+int
+g2busprint(void *aux, const char *pnp)
+{
+
+       return (UNCONF);
+}
+
+int
+g2bussearch(struct device *parent, struct cfdata *cf, void *aux)
+{
+
+       if ((*cf->cf_attach->ca_match)(parent, cf, aux) > 0)
+               config_attach(parent, cf, aux, g2busprint);
+
+       return (0);
+}
diff -r 1df6583943ef -r d40d62dde286 sys/arch/dreamcast/dev/g2/g2bus_bus_mem.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/dreamcast/dev/g2/g2bus_bus_mem.c Wed Jan 31 18:33:24 2001 +0000
@@ -0,0 +1,170 @@
+/*     $NetBSD: g2bus_bus_mem.c,v 1.1 2001/01/31 18:33:24 thorpej Exp $        */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the NetBSD
+ *     Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+
+/*
+ * Bus space implementation for the SEGA G2 bus.
+ *
+ * NOTE: We only implement a small subset of what the bus_space(9)
+ * API specifies.  Right now, the GAPS PCI bridge is only used for
+ * the Dreamcast Broadband Adatper, so we only provide what the
+ * pci(4) and rtk(4) drivers need.
+ */
+
+#include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
+
+#include <sys/param.h>
+#include <sys/systm.h> 
+#include <sys/device.h>
+
+#include <machine/cpu.h> 
+#include <machine/bus.h>
+
+#include <dev/pci/pcivar.h>
+
+#include <dreamcast/dev/g2/g2busvar.h>
+
+int    g2bus_bus_mem_map(void *, bus_addr_t, bus_size_t, int,
+           bus_space_handle_t *);
+void   g2bus_bus_mem_unmap(void *, bus_space_handle_t, bus_size_t);
+
+u_int8_t g2bus_bus_mem_read_1(void *, bus_space_handle_t, bus_size_t);
+u_int16_t g2bus_bus_mem_read_2(void *, bus_space_handle_t, bus_size_t);
+u_int32_t g2bus_bus_mem_read_4(void *, bus_space_handle_t, bus_size_t);
+
+void   g2bus_bus_mem_write_1(void *, bus_space_handle_t, bus_size_t,
+           u_int8_t);
+void   g2bus_bus_mem_write_2(void *, bus_space_handle_t, bus_size_t,
+           u_int16_t);
+void   g2bus_bus_mem_write_4(void *, bus_space_handle_t, bus_size_t,
+           u_int32_t);
+
+void
+g2bus_bus_mem_init(struct g2bus_softc *sc)
+{
+       bus_space_tag_t t = &sc->sc_memt;
+
+       memset(t, 0, sizeof(*t));
+
+       t->dbs_map = g2bus_bus_mem_map;
+       t->dbs_unmap = g2bus_bus_mem_unmap;
+
+       t->dbs_r_1 = g2bus_bus_mem_read_1;
+       t->dbs_r_2 = g2bus_bus_mem_read_2;
+       t->dbs_r_4 = g2bus_bus_mem_read_4;
+
+       t->dbs_w_1 = g2bus_bus_mem_write_1;
+       t->dbs_w_2 = g2bus_bus_mem_write_2;
+       t->dbs_w_4 = g2bus_bus_mem_write_4;
+}
+
+int
+g2bus_bus_mem_map(void *v, bus_addr_t addr, bus_size_t size, int flags,
+    bus_space_handle_t *shp)
+{
+
+       KASSERT((addr & SH3_PHYS_MASK) == addr);
+       *shp = SH3_PHYS_TO_P2SEG(addr);
+
+       return (0);
+}
+
+void
+g2bus_bus_mem_unmap(void *v, bus_space_handle_t sh, bus_size_t size)
+{
+
+       KASSERT(sh >= SH3_P2SEG_BASE && sh <= SH3_P2SEG_END);
+       /* Nothing to do. */
+}
+
+/*
+ * XXX NEED TO ADD THE LOCKING STUFF THAT MARCUS MENTIONED!
+ */
+
+u_int8_t
+g2bus_bus_mem_read_1(void *v, bus_space_handle_t sh, bus_size_t off)
+{
+       u_int8_t rv;
+
+       rv = *(u_int8_t *)(sh + off);
+
+       return (rv);
+}
+
+u_int16_t
+g2bus_bus_mem_read_2(void *v, bus_space_handle_t sh, bus_size_t off)
+{
+       u_int16_t rv;
+
+       rv = *(u_int16_t *)(sh + off);
+
+       return (rv);
+}
+
+u_int32_t
+g2bus_bus_mem_read_4(void *v, bus_space_handle_t sh, bus_size_t off)
+{
+       u_int32_t rv;
+
+       rv = *(u_int32_t *)(sh + off);
+
+       return (rv);
+}
+
+void
+g2bus_bus_mem_write_1(void *v, bus_space_handle_t sh, bus_size_t off,
+    u_int8_t val)
+{
+
+       *(u_int8_t *)(sh + off) = val;
+}
+
+void
+g2bus_bus_mem_write_2(void *v, bus_space_handle_t sh, bus_size_t off,
+    u_int16_t val)
+{
+
+       *(u_int16_t *)(sh + off) = val;
+}
+
+void
+g2bus_bus_mem_write_4(void *v, bus_space_handle_t sh, bus_size_t off,
+    u_int32_t val)
+{
+
+       *(u_int32_t *)(sh + off) = val;
+}
diff -r 1df6583943ef -r d40d62dde286 sys/arch/dreamcast/dev/g2/g2busvar.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/dreamcast/dev/g2/g2busvar.h      Wed Jan 31 18:33:24 2001 +0000
@@ -0,0 +1,68 @@
+/*     $NetBSD: g2busvar.h,v 1.1 2001/01/31 18:33:24 thorpej Exp $     */
+
+/*-
+ * Copyright (c) 2001 Marcus Comstedt
+ * All rights reserved.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by Marcus Comstedt.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived