Annotation of sys/arch/alpha/pci/apecs_pci.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: apecs_pci.c,v 1.10 2006/03/26 20:23:08 brad Exp $ */
! 2: /* $NetBSD: apecs_pci.c,v 1.10 1996/11/13 21:13:25 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995, 1996 Carnegie-Mellon University.
! 6: * All rights reserved.
! 7: *
! 8: * Author: Chris G. Demetriou
! 9: *
! 10: * Permission to use, copy, modify and distribute this software and
! 11: * its documentation is hereby granted, provided that both the copyright
! 12: * notice and this permission notice appear in all copies of the
! 13: * software, derivative works or modified versions, and any portions
! 14: * thereof, and that both notices appear in supporting documentation.
! 15: *
! 16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 19: *
! 20: * Carnegie Mellon requests users of this software to return to
! 21: *
! 22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 23: * School of Computer Science
! 24: * Carnegie Mellon University
! 25: * Pittsburgh PA 15213-3890
! 26: *
! 27: * any improvements or extensions that they make and grant Carnegie the
! 28: * rights to redistribute these changes.
! 29: */
! 30:
! 31: #include <sys/param.h>
! 32: #include <sys/systm.h>
! 33: #include <sys/kernel.h>
! 34: #include <sys/device.h>
! 35:
! 36: #include <uvm/uvm_extern.h>
! 37:
! 38: #include <machine/autoconf.h> /* badaddr() proto */
! 39:
! 40: #include <dev/pci/pcireg.h>
! 41: #include <dev/pci/pcivar.h>
! 42: #include <alpha/pci/apecsreg.h>
! 43: #include <alpha/pci/apecsvar.h>
! 44:
! 45: void apecs_attach_hook(struct device *, struct device *,
! 46: struct pcibus_attach_args *);
! 47: int apecs_bus_maxdevs(void *, int);
! 48: pcitag_t apecs_make_tag(void *, int, int, int);
! 49: void apecs_decompose_tag(void *, pcitag_t, int *, int *,
! 50: int *);
! 51: pcireg_t apecs_conf_read(void *, pcitag_t, int);
! 52: void apecs_conf_write(void *, pcitag_t, int, pcireg_t);
! 53:
! 54: void
! 55: apecs_pci_init(pc, v)
! 56: pci_chipset_tag_t pc;
! 57: void *v;
! 58: {
! 59:
! 60: pc->pc_conf_v = v;
! 61: pc->pc_attach_hook = apecs_attach_hook;
! 62: pc->pc_bus_maxdevs = apecs_bus_maxdevs;
! 63: pc->pc_make_tag = apecs_make_tag;
! 64: pc->pc_decompose_tag = apecs_decompose_tag;
! 65: pc->pc_conf_read = apecs_conf_read;
! 66: pc->pc_conf_write = apecs_conf_write;
! 67: }
! 68:
! 69: void
! 70: apecs_attach_hook(parent, self, pba)
! 71: struct device *parent, *self;
! 72: struct pcibus_attach_args *pba;
! 73: {
! 74: }
! 75:
! 76: int
! 77: apecs_bus_maxdevs(cpv, busno)
! 78: void *cpv;
! 79: int busno;
! 80: {
! 81:
! 82: return 32;
! 83: }
! 84:
! 85: pcitag_t
! 86: apecs_make_tag(cpv, b, d, f)
! 87: void *cpv;
! 88: int b, d, f;
! 89: {
! 90:
! 91: return (b << 16) | (d << 11) | (f << 8);
! 92: }
! 93:
! 94: void
! 95: apecs_decompose_tag(cpv, tag, bp, dp, fp)
! 96: void *cpv;
! 97: pcitag_t tag;
! 98: int *bp, *dp, *fp;
! 99: {
! 100:
! 101: if (bp != NULL)
! 102: *bp = (tag >> 16) & 0xff;
! 103: if (dp != NULL)
! 104: *dp = (tag >> 11) & 0x1f;
! 105: if (fp != NULL)
! 106: *fp = (tag >> 8) & 0x7;
! 107: }
! 108:
! 109: pcireg_t
! 110: apecs_conf_read(cpv, tag, offset)
! 111: void *cpv;
! 112: pcitag_t tag;
! 113: int offset;
! 114: {
! 115: struct apecs_config *acp = cpv;
! 116: pcireg_t *datap, data;
! 117: int s, secondary, ba;
! 118: int32_t old_haxr2; /* XXX */
! 119:
! 120: s = 0; /* XXX gcc -Wuninitialized */
! 121: old_haxr2 = 0; /* XXX gcc -Wuninitialized */
! 122:
! 123: /* secondary if bus # != 0 */
! 124: pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0);
! 125: if (secondary) {
! 126: s = splhigh();
! 127: old_haxr2 = REGVAL(EPIC_HAXR2);
! 128: alpha_mb();
! 129: REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
! 130: alpha_mb();
! 131: }
! 132:
! 133: datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
! 134: tag << 5UL | /* XXX */
! 135: (offset & ~0x03) << 5 | /* XXX */
! 136: 0 << 5 | /* XXX */
! 137: 0x3 << 3); /* XXX */
! 138: data = (pcireg_t)-1;
! 139: if (!(ba = badaddr(datap, sizeof *datap)))
! 140: data = *datap;
! 141:
! 142: if (secondary) {
! 143: alpha_mb();
! 144: REGVAL(EPIC_HAXR2) = old_haxr2;
! 145: alpha_mb();
! 146: splx(s);
! 147: }
! 148:
! 149: #if 0
! 150: printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg,
! 151: data, datap, ba ? " (badaddr)" : "");
! 152: #endif
! 153:
! 154: return data;
! 155: }
! 156:
! 157: void
! 158: apecs_conf_write(cpv, tag, offset, data)
! 159: void *cpv;
! 160: pcitag_t tag;
! 161: int offset;
! 162: pcireg_t data;
! 163: {
! 164: struct apecs_config *acp = cpv;
! 165: pcireg_t *datap;
! 166: int s, secondary;
! 167: int32_t old_haxr2; /* XXX */
! 168:
! 169: s = 0; /* XXX gcc -Wuninitialized */
! 170: old_haxr2 = 0; /* XXX gcc -Wuninitialized */
! 171:
! 172: /* secondary if bus # != 0 */
! 173: pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0);
! 174: if (secondary) {
! 175: s = splhigh();
! 176: old_haxr2 = REGVAL(EPIC_HAXR2);
! 177: alpha_mb();
! 178: REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
! 179: alpha_mb();
! 180: }
! 181:
! 182: datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
! 183: tag << 5UL | /* XXX */
! 184: (offset & ~0x03) << 5 | /* XXX */
! 185: 0 << 5 | /* XXX */
! 186: 0x3 << 3); /* XXX */
! 187:
! 188: alpha_mb();
! 189: *datap = data;
! 190: alpha_mb();
! 191: alpha_mb();
! 192:
! 193: if (secondary) {
! 194: alpha_mb();
! 195: REGVAL(EPIC_HAXR2) = old_haxr2;
! 196: alpha_mb();
! 197: splx(s);
! 198: }
! 199:
! 200: #if 0
! 201: printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
! 202: reg, data, datap);
! 203: #endif
! 204: }
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