Annotation of sys/arch/alpha/pci/irongate_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: irongate_pci.c,v 1.4 2002/03/14 01:26:27 millert Exp $ */
! 2: /* $NetBSD: irongate_pci.c,v 1.2 2000/06/29 08:58:47 mrg Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * PCI Configuration Space support for the AMD 751 (``Irongate'') core logic
! 42: * chipset.
! 43: */
! 44:
! 45: #include <sys/param.h>
! 46: #include <sys/systm.h>
! 47: #include <sys/kernel.h>
! 48: #include <sys/device.h>
! 49:
! 50: #include <uvm/uvm_extern.h>
! 51:
! 52: #include <dev/pci/pcireg.h>
! 53: #include <dev/pci/pcivar.h>
! 54: #include <alpha/pci/irongatereg.h>
! 55: #include <alpha/pci/irongatevar.h>
! 56:
! 57: void irongate_attach_hook(struct device *, struct device *,
! 58: struct pcibus_attach_args *);
! 59: int irongate_bus_maxdevs(void *, int);
! 60: pcitag_t irongate_make_tag(void *, int, int, int);
! 61: void irongate_decompose_tag(void *, pcitag_t, int *, int *,
! 62: int *);
! 63: pcireg_t irongate_conf_read(void *, pcitag_t, int);
! 64: void irongate_conf_write(void *, pcitag_t, int, pcireg_t);
! 65:
! 66: /* AMD 751 systems are always single-processor, so this is easy. */
! 67: #define PCI_CONF_LOCK(s) (s) = splhigh()
! 68: #define PCI_CONF_UNLOCK(s) splx((s))
! 69:
! 70: #define PCI_CONF_ADDR (IRONGATE_IO_BASE|IRONGATE_CONFADDR)
! 71: #define PCI_CONF_DATA (IRONGATE_IO_BASE|IRONGATE_CONFDATA)
! 72:
! 73: #define REGVAL(r) (*(__volatile u_int32_t *)ALPHA_PHYS_TO_K0SEG(r))
! 74:
! 75: void
! 76: irongate_pci_init(pci_chipset_tag_t pc, void *v)
! 77: {
! 78:
! 79: pc->pc_conf_v = v;
! 80: pc->pc_attach_hook = irongate_attach_hook;
! 81: pc->pc_bus_maxdevs = irongate_bus_maxdevs;
! 82: pc->pc_make_tag = irongate_make_tag;
! 83: pc->pc_decompose_tag = irongate_decompose_tag;
! 84: pc->pc_conf_read = irongate_conf_read;
! 85: pc->pc_conf_write = irongate_conf_write;
! 86: }
! 87:
! 88: void
! 89: irongate_attach_hook(struct device *parent, struct device *self,
! 90: struct pcibus_attach_args *pba)
! 91: {
! 92: }
! 93:
! 94: int
! 95: irongate_bus_maxdevs(void *ipv, int busno)
! 96: {
! 97:
! 98: return 32;
! 99: }
! 100:
! 101: pcitag_t
! 102: irongate_make_tag(void *ipv, int b, int d, int f)
! 103: {
! 104:
! 105: return (b << 16) | (d << 11) | (f << 8);
! 106: }
! 107:
! 108: void
! 109: irongate_decompose_tag(void *ipv, pcitag_t tag, int *bp, int *dp, int *fp)
! 110: {
! 111:
! 112: if (bp != NULL)
! 113: *bp = (tag >> 16) & 0xff;
! 114: if (dp != NULL)
! 115: *dp = (tag >> 11) & 0x1f;
! 116: if (fp != NULL)
! 117: *fp = (tag >> 8) & 0x7;
! 118: }
! 119:
! 120: pcireg_t
! 121: irongate_conf_read(void *ipv, pcitag_t tag, int offset)
! 122: {
! 123: int d;
! 124:
! 125: /*
! 126: * The AMD 751 appears in PCI configuration space, but
! 127: * that is ... counter-intuitive to the way we normally
! 128: * attach PCI-Host bridges on the Alpha. So, filter out
! 129: * the AMD 751 device here. We provide a private entry
! 130: * point for getting at it from machdep code.
! 131: */
! 132: irongate_decompose_tag(ipv, tag, NULL, &d, NULL);
! 133: if (d == IRONGATE_PCIHOST_DEV)
! 134: return ((pcireg_t) -1);
! 135:
! 136: return (irongate_conf_read0(ipv, tag, offset));
! 137: }
! 138:
! 139: pcireg_t
! 140: irongate_conf_read0(void *ipv, pcitag_t tag, int offset)
! 141: {
! 142: pcireg_t data;
! 143: int s;
! 144:
! 145: PCI_CONF_LOCK(s);
! 146: REGVAL(PCI_CONF_ADDR) = (CONFADDR_ENABLE | tag | (offset & 0xff));
! 147: alpha_mb();
! 148: data = REGVAL(PCI_CONF_DATA);
! 149: REGVAL(PCI_CONF_ADDR) = 0;
! 150: alpha_mb();
! 151: PCI_CONF_UNLOCK(s);
! 152:
! 153: return (data);
! 154: }
! 155:
! 156: void
! 157: irongate_conf_write(void *ipv, pcitag_t tag, int offset, pcireg_t data)
! 158: {
! 159: int s;
! 160:
! 161: PCI_CONF_LOCK(s);
! 162: REGVAL(PCI_CONF_ADDR) = (CONFADDR_ENABLE | tag | (offset & 0xff));
! 163: alpha_mb();
! 164: REGVAL(PCI_CONF_DATA) = data;
! 165: alpha_mb();
! 166: REGVAL(PCI_CONF_ADDR) = 0;
! 167: alpha_mb();
! 168: PCI_CONF_UNLOCK(s);
! 169: }
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