[src/trunk]: src/sys/arch/mips/bonito PCI configuration space access for BONITO.

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

details:   https://anonhg.NetBSD.org/src/rev/13dd497908a5
branches:  trunk
changeset: 511584:13dd497908a5
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Fri Jun 22 03:58:55 2001 +0000

description:
PCI configuration space access for BONITO.

diffstat:

 sys/arch/mips/bonito/bonito_pci.c |  199 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 199 insertions(+), 0 deletions(-)

diffs (203 lines):

diff -r 93b4a1899d0a -r 13dd497908a5 sys/arch/mips/bonito/bonito_pci.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/mips/bonito/bonito_pci.c Fri Jun 22 03:58:55 2001 +0000
@@ -0,0 +1,199 @@
+/*     $NetBSD: bonito_pci.c,v 1.1 2001/06/22 03:58:55 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.
+ */
+
+/*
+ * PCI configuration space support for the Algorithmics BONITO
+ * MIPS PCI and memory controller.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+#include <machine/locore.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+
+#include <mips/bonito/bonitoreg.h>
+#include <mips/bonito/bonitovar.h>
+
+/*
+ * Bonito systems are always single-processor, so this is sufficient.
+ */
+#define        PCI_CONF_LOCK(s)        (s) = splhigh()
+#define        PCI_CONF_UNLOCK(s)      splx((s))
+
+void           bonito_attach_hook(struct device *, struct device *,
+                   struct pcibus_attach_args *);
+int            bonito_bus_maxdevs(void *, int);
+pcitag_t       bonito_make_tag(void *, int, int, int);
+void           bonito_decompose_tag(void *, pcitag_t, int *, int *, int *);
+pcireg_t       bonito_conf_read(void *, pcitag_t, int);
+void           bonito_conf_write(void *, pcitag_t, int, pcireg_t);
+
+void
+bonito_pci_init(pci_chipset_tag_t pc, struct bonito_config *bc)
+{
+
+       pc->pc_conf_v = bc;
+       pc->pc_attach_hook = bonito_attach_hook;
+       pc->pc_bus_maxdevs = bonito_bus_maxdevs;
+       pc->pc_make_tag = bonito_make_tag;
+       pc->pc_decompose_tag = bonito_decompose_tag;
+       pc->pc_conf_read = bonito_conf_read;
+       pc->pc_conf_write = bonito_conf_write;
+}
+
+void
+bonito_attach_hook(struct device *parent, struct device *self,
+    struct pcibus_attach_args *pba)
+{
+}
+
+int
+bonito_bus_maxdevs(void *v, int busno)
+{
+
+       return (32);
+}
+
+pcitag_t
+bonito_make_tag(void *v, int b, int d, int f)
+{
+
+       return ((b << 16) | (d << 11) | (f << 8));
+}
+
+void
+bonito_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp)
+{
+
+       if (bp != NULL)
+               *bp = (tag >> 16) & 0xff;
+       if (dp != NULL)
+               *dp = (tag >> 11) & 0x1f;
+       if (fp != NULL)
+               *fp = (tag >> 8) & 0x7;
+}
+
+static int
+bonito_conf_addr(struct bonito_config *bc, pcitag_t tag, int offset,
+    u_int32_t *cfgoff, u_int32_t *pcimap_cfg)
+{
+       int b, d, f;
+
+       bonito_decompose_tag(bc, tag, &b, &d, &f);
+
+       if (b == 0) {
+               if (d > (31 - bc->bc_adbase))
+                       return (1);
+               *cfgoff = (1UL << (d + bc->bc_adbase)) | (f << 8) |
+                   offset;
+               *pcimap_cfg = 0;
+       } else {
+               *cfgoff = tag | offset;
+               *pcimap_cfg = BONITO_PCIMAPCFG_TYPE1;
+       }
+
+       return (0);
+}
+
+pcireg_t
+bonito_conf_read(void *v, pcitag_t tag, int offset)
+{
+       struct bonito_config *bc = v;
+       pcireg_t data;
+       u_int32_t cfgoff, pcimap_cfg;
+       int s;
+
+       if (bonito_conf_addr(bc, tag, offset, &cfgoff, &pcimap_cfg))
+               return ((pcireg_t) -1);
+
+       PCI_CONF_LOCK(s);
+
+       /* clear aborts */
+       REGVAL(BONITO_PCICMD) |=
+           PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT;
+
+       /* high 16 bits of address go into PciMapCfg register */
+       REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg;
+
+       wbflush();
+
+       /* low 16 bits of address are offset into config space */
+       data = REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc));
+
+       /* check for error */
+       if (REGVAL(BONITO_PCICMD) &
+           (PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT))
+               data = (pcireg_t) -1;
+
+       PCI_CONF_UNLOCK(s);
+
+       return (data);
+}
+
+void
+bonito_conf_write(void *v, pcitag_t tag, int offset, pcireg_t data)
+{
+       struct bonito_config *vt = v;
+       u_int32_t cfgoff, pcimap_cfg;
+       int s;
+
+       if (bonito_conf_addr(vt, tag, offset, &cfgoff, &pcimap_cfg))
+               panic("bonito_conf_write");
+
+       PCI_CONF_LOCK(s);
+
+       /* clear aborts */
+       REGVAL(BONITO_PCICMD) |=
+           PCI_STATUS_MASTER_ABORT | PCI_STATUS_MASTER_TARGET_ABORT;
+
+       /* high 16 bits of address go into PciMapCfg register */
+       REGVAL(BONITO_PCIMAP_CFG) = (cfgoff >> 16) | pcimap_cfg;
+
+       wbflush();
+
+       /* low 16 bits of address are offset into config space */
+       REGVAL(BONITO_PCICFG_BASE + (cfgoff & 0xfffc)) = data;
+
+       PCI_CONF_UNLOCK(s);
+}