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apecs_pci.c revision 1.21 
      1 /* $NetBSD: apecs_pci.c,v 1.21 2009/03/14 15:35:59 dsl Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     31 
     32 __KERNEL_RCSID(0, "$NetBSD: apecs_pci.c,v 1.21 2009/03/14 15:35:59 dsl Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/kernel.h>
     37 #include <sys/device.h>
     38 
     39 #include <uvm/uvm_extern.h>
     40 
     41 #include <dev/pci/pcireg.h>
     42 #include <dev/pci/pcivar.h>
     43 #include <alpha/pci/apecsreg.h>
     44 #include <alpha/pci/apecsvar.h>
     45 
     46 void		apecs_attach_hook(struct device *, struct device *,
     47 		    struct pcibus_attach_args *);
     48 int		apecs_bus_maxdevs(void *, int);
     49 pcitag_t	apecs_make_tag(void *, int, int, int);
     50 void		apecs_decompose_tag(void *, pcitag_t, int *, int *,
     51 		    int *);
     52 pcireg_t	apecs_conf_read(void *, pcitag_t, int);
     53 void		apecs_conf_write(void *, pcitag_t, int, pcireg_t);
     54 
     55 void
     56 apecs_pci_init(pci_chipset_tag_t pc, void *v)
     57 {
     58 
     59 	pc->pc_conf_v = v;
     60 	pc->pc_attach_hook = apecs_attach_hook;
     61 	pc->pc_bus_maxdevs = apecs_bus_maxdevs;
     62 	pc->pc_make_tag = apecs_make_tag;
     63 	pc->pc_decompose_tag = apecs_decompose_tag;
     64 	pc->pc_conf_read = apecs_conf_read;
     65 	pc->pc_conf_write = apecs_conf_write;
     66 }
     67 
     68 void
     69 apecs_attach_hook(parent, self, pba)
     70 	struct device *parent, *self;
     71 	struct pcibus_attach_args *pba;
     72 {
     73 }
     74 
     75 int
     76 apecs_bus_maxdevs(void *cpv, int busno)
     77 {
     78 
     79 	return 32;
     80 }
     81 
     82 pcitag_t
     83 apecs_make_tag(cpv, b, d, f)
     84 	void *cpv;
     85 	int b, d, f;
     86 {
     87 
     88 	return (b << 16) | (d << 11) | (f << 8);
     89 }
     90 
     91 void
     92 apecs_decompose_tag(cpv, tag, bp, dp, fp)
     93 	void *cpv;
     94 	pcitag_t tag;
     95 	int *bp, *dp, *fp;
     96 {
     97 
     98 	if (bp != NULL)
     99 		*bp = (tag >> 16) & 0xff;
    100 	if (dp != NULL)
    101 		*dp = (tag >> 11) & 0x1f;
    102 	if (fp != NULL)
    103 		*fp = (tag >> 8) & 0x7;
    104 }
    105 
    106 pcireg_t
    107 apecs_conf_read(void *cpv, pcitag_t tag, int offset)
    108 {
    109 	struct apecs_config *acp = cpv;
    110 	pcireg_t *datap, data;
    111 	int s, secondary, ba;
    112 	int32_t old_haxr2;					/* XXX */
    113 
    114 	s = 0;					/* XXX gcc -Wuninitialized */
    115 	old_haxr2 = 0;				/* XXX gcc -Wuninitialized */
    116 
    117 	/* secondary if bus # != 0 */
    118 	pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0);
    119 	if (secondary) {
    120 		s = splhigh();
    121 		old_haxr2 = REGVAL(EPIC_HAXR2);
    122 		alpha_mb();
    123 		REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
    124 		alpha_mb();
    125 	}
    126 
    127 	datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
    128 	    tag << 5UL |					/* XXX */
    129 	    (offset & ~0x03) << 5 |				/* XXX */
    130 	    0 << 5 |						/* XXX */
    131 	    0x3 << 3);						/* XXX */
    132 	data = (pcireg_t)-1;
    133 	if (!(ba = badaddr(datap, sizeof *datap)))
    134 		data = *datap;
    135 
    136 	if (secondary) {
    137 		alpha_mb();
    138 		REGVAL(EPIC_HAXR2) = old_haxr2;
    139 		alpha_mb();
    140 		splx(s);
    141 	}
    142 
    143 #if 0
    144 	printf("apecs_conf_read: tag 0x%lx, reg 0x%lx -> %x @ %p%s\n", tag, reg,
    145 	    data, datap, ba ? " (badaddr)" : "");
    146 #endif
    147 
    148 	return data;
    149 }
    150 
    151 void
    152 apecs_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
    153 {
    154 	struct apecs_config *acp = cpv;
    155 	pcireg_t *datap;
    156 	int s, secondary;
    157 	int32_t old_haxr2;					/* XXX */
    158 
    159 	s = 0;					/* XXX gcc -Wuninitialized */
    160 	old_haxr2 = 0;				/* XXX gcc -Wuninitialized */
    161 
    162 	/* secondary if bus # != 0 */
    163 	pci_decompose_tag(&acp->ac_pc, tag, &secondary, 0, 0);
    164 	if (secondary) {
    165 		s = splhigh();
    166 		old_haxr2 = REGVAL(EPIC_HAXR2);
    167 		alpha_mb();
    168 		REGVAL(EPIC_HAXR2) = old_haxr2 | 0x1;
    169 		alpha_mb();
    170 	}
    171 
    172 	datap = (pcireg_t *)ALPHA_PHYS_TO_K0SEG(APECS_PCI_CONF |
    173 	    tag << 5UL |					/* XXX */
    174 	    (offset & ~0x03) << 5 |				/* XXX */
    175 	    0 << 5 |						/* XXX */
    176 	    0x3 << 3);						/* XXX */
    177 
    178 	alpha_mb();
    179 	*datap = data;
    180 	alpha_mb();
    181 	alpha_mb();
    182 
    183 	if (secondary) {
    184 		alpha_mb();
    185 		REGVAL(EPIC_HAXR2) = old_haxr2;
    186 		alpha_mb();
    187 		splx(s);
    188 	}
    189 
    190 #if 0
    191 	printf("apecs_conf_write: tag 0x%lx, reg 0x%lx -> 0x%x @ %p\n", tag,
    192 	    reg, data, datap);
    193 #endif
    194 }
    195