Annotation of sys/arch/alpha/pci/mcpcia_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mcpcia_pci.c,v 1.1 2007/03/16 21:22:27 robert Exp $ */
! 2: /* $NetBSD: mcpcia_pci.c,v 1.5 2007/03/04 05:59:11 christos Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1998 by Matthew Jacob
! 6: * NASA AMES Research Center.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice immediately at the beginning of the file, without modification,
! 14: * this list of conditions, and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. The name of the author may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
! 25: * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: */
! 33:
! 34: #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/kernel.h>
! 38: #include <sys/device.h>
! 39:
! 40: #include <uvm/uvm_extern.h>
! 41:
! 42: #include <dev/pci/pcireg.h>
! 43: #include <dev/pci/pcivar.h>
! 44: #include <alpha/pci/mcpciareg.h>
! 45: #include <alpha/pci/mcpciavar.h>
! 46:
! 47: #define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
! 48:
! 49: static void mcpcia_attach_hook (struct device *, struct device *,
! 50: struct pcibus_attach_args *);
! 51: static int
! 52: mcpcia_bus_maxdevs (void *, int);
! 53: static pcitag_t
! 54: mcpcia_make_tag (void *, int, int, int);
! 55: static void
! 56: mcpcia_decompose_tag (void *, pcitag_t, int *, int *, int *);
! 57: static pcireg_t
! 58: mcpcia_conf_read (void *, pcitag_t, int);
! 59: static void
! 60: mcpcia_conf_write (void *, pcitag_t, int, pcireg_t);
! 61:
! 62: void
! 63: mcpcia_pci_init(pc, v)
! 64: pci_chipset_tag_t pc;
! 65: void *v;
! 66: {
! 67: pc->pc_conf_v = v;
! 68: pc->pc_attach_hook = mcpcia_attach_hook;
! 69: pc->pc_bus_maxdevs = mcpcia_bus_maxdevs;
! 70: pc->pc_make_tag = mcpcia_make_tag;
! 71: pc->pc_decompose_tag = mcpcia_decompose_tag;
! 72: pc->pc_conf_read = mcpcia_conf_read;
! 73: pc->pc_conf_write = mcpcia_conf_write;
! 74: }
! 75:
! 76: static void
! 77: mcpcia_attach_hook(parent, self, pba)
! 78: struct device *parent, *self;
! 79: struct pcibus_attach_args *pba;
! 80: {
! 81: }
! 82:
! 83: static int
! 84: mcpcia_bus_maxdevs(cpv, busno)
! 85: void *cpv;
! 86: int busno;
! 87: {
! 88: return (MCPCIA_MAXDEV);
! 89: }
! 90:
! 91: static pcitag_t
! 92: mcpcia_make_tag(cpv, b, d, f)
! 93: void *cpv;
! 94: int b, d, f;
! 95: {
! 96: pcitag_t tag;
! 97: tag = (b << 21) | (d << 16) | (f << 13);
! 98: return (tag);
! 99: }
! 100:
! 101: static void
! 102: mcpcia_decompose_tag(cpv, tag, bp, dp, fp)
! 103: void *cpv;
! 104: pcitag_t tag;
! 105: int *bp, *dp, *fp;
! 106: {
! 107: if (bp != NULL)
! 108: *bp = (tag >> 21) & 0xff;
! 109: if (dp != NULL)
! 110: *dp = (tag >> 16) & 0x1f;
! 111: if (fp != NULL)
! 112: *fp = (tag >> 13) & 0x7;
! 113: }
! 114:
! 115: static pcireg_t
! 116: mcpcia_conf_read(cpv, tag, offset)
! 117: void *cpv;
! 118: pcitag_t tag;
! 119: int offset;
! 120: {
! 121: struct mcpcia_config *ccp = cpv;
! 122: pcireg_t *dp, data = (pcireg_t) -1;
! 123: unsigned long paddr;
! 124:
! 125: /*
! 126: * There's nothing in slot 0 on a primary bus- don't even try.
! 127: */
! 128: if ((tag >> 21) == 0 && ((u_int32_t) tag & 0x1f0000) == 0)
! 129: return (data);
! 130:
! 131: if (ccp == NULL) {
! 132: panic("NULL ccp in mcpcia_conf_read");
! 133: }
! 134: paddr = (unsigned long) tag;
! 135: paddr |= (3LL << 3); /* 32 Bit PCI byte enables */
! 136: paddr |= ((unsigned long) ((offset >> 2) << 7));
! 137: paddr |= MCPCIA_PCI_CONF;
! 138: paddr |= ccp->cc_sysbase;
! 139: dp = (pcireg_t *)KV(paddr);
! 140: if (badaddr(dp, sizeof (*dp)) == 0) {
! 141: data = *dp;
! 142: }
! 143: return (data);
! 144: }
! 145:
! 146: static void
! 147: mcpcia_conf_write(cpv, tag, offset, data)
! 148: void *cpv;
! 149: pcitag_t tag;
! 150: int offset;
! 151: pcireg_t data;
! 152: {
! 153: struct mcpcia_config *ccp = cpv;
! 154: pcireg_t *dp;
! 155: unsigned long paddr;
! 156:
! 157: /*
! 158: * There's nothing in slot 0 on a primary bus- don't even try.
! 159: */
! 160: if ((tag >> 21) == 0 && ((u_int32_t) tag & 0x1f0000) == 0)
! 161: return;
! 162:
! 163: if (ccp == NULL) {
! 164: panic("NULL ccp in mcpcia_conf_write");
! 165: }
! 166: paddr = (unsigned long) tag;
! 167: paddr |= (3LL << 3); /* 32 Bit PCI byte enables */
! 168: paddr |= ((unsigned long) ((offset >> 2) << 7));
! 169: paddr |= MCPCIA_PCI_CONF;
! 170: paddr |= ccp->cc_sysbase;
! 171:
! 172: dp = (pcireg_t *)KV(paddr);
! 173: *dp = data;
! 174: }
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