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Annotation of sys/arch/alpha/pci/tsp_pci.c, Revision 1.1

1.1     ! nbrk        1: /* $OpenBSD: tsp_pci.c,v 1.3 2002/03/14 01:26:27 millert Exp $ */
        !             2: /* $NetBSD: tsp_pci.c,v 1.1 1999/06/29 06:46:47 ross Exp $ */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by Ross Harvey.
        !            18:  * 4. The name of Ross Harvey 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 ROSS HARVEY ``AS IS'' AND ANY EXPRESS
        !            22:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            23:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
        !            25:  * 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:
        !            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:
        !            45: #include <machine/autoconf.h>
        !            46: #include <machine/rpb.h>
        !            47:
        !            48: #include <alpha/pci/tsreg.h>
        !            49: #include <alpha/pci/tsvar.h>
        !            50:
        !            51: #define tsp_pci() { Generate ctags(1) key. }
        !            52:
        !            53: void           tsp_attach_hook(struct device *, struct device *,
        !            54:                    struct pcibus_attach_args *);
        !            55: int            tsp_bus_maxdevs(void *, int);
        !            56: pcitag_t       tsp_make_tag(void *, int, int, int);
        !            57: void           tsp_decompose_tag(void *, pcitag_t, int *, int *,
        !            58:                    int *);
        !            59: pcireg_t       tsp_conf_read(void *, pcitag_t, int);
        !            60: void           tsp_conf_write(void *, pcitag_t, int, pcireg_t);
        !            61:
        !            62: void
        !            63: tsp_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 = tsp_attach_hook;
        !            69:        pc->pc_bus_maxdevs = tsp_bus_maxdevs;
        !            70:        pc->pc_make_tag = tsp_make_tag;
        !            71:        pc->pc_decompose_tag = tsp_decompose_tag;
        !            72:        pc->pc_conf_read = tsp_conf_read;
        !            73:        pc->pc_conf_write = tsp_conf_write;
        !            74: }
        !            75:
        !            76: void
        !            77: tsp_attach_hook(parent, self, pba)
        !            78:        struct device *parent, *self;
        !            79:        struct pcibus_attach_args *pba;
        !            80: {
        !            81: }
        !            82:
        !            83: int
        !            84: tsp_bus_maxdevs(cpv, busno)
        !            85:        void *cpv;
        !            86:        int busno;
        !            87: {
        !            88:        return 32;
        !            89: }
        !            90:
        !            91: pcitag_t
        !            92: tsp_make_tag(cpv, b, d, f)
        !            93:        void *cpv;
        !            94:        int b, d, f;
        !            95: {
        !            96:        return b << 16 | d << 11 | f << 8;
        !            97: }
        !            98:
        !            99: void
        !           100: tsp_decompose_tag(cpv, tag, bp, dp, fp)
        !           101:        void *cpv;
        !           102:        pcitag_t tag;
        !           103:        int *bp, *dp, *fp;
        !           104: {
        !           105:        if (bp != NULL)
        !           106:                *bp = (tag >> 16) & 0xff;
        !           107:        if (dp != NULL)
        !           108:                *dp = (tag >> 11) & 0x1f;
        !           109:        if (fp != NULL)
        !           110:                *fp = (tag >> 8) & 0x7;
        !           111: }
        !           112: /*
        !           113:  * Tsunami makes this a lot easier than it used to be, automatically
        !           114:  * generating type 0 or type 1 cycles, and quietly returning -1 with
        !           115:  * no errors on unanswered probes.
        !           116:  */
        !           117: pcireg_t
        !           118: tsp_conf_read(cpv, tag, offset)
        !           119:        void *cpv;
        !           120:        pcitag_t tag;
        !           121:        int offset;
        !           122: {
        !           123:        pcireg_t *datap, data;
        !           124:        struct tsp_config *pcp = cpv;
        !           125:
        !           126:        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        !           127:        alpha_mb();
        !           128:        data = *datap;
        !           129:        alpha_mb();
        !           130:        return data;
        !           131: }
        !           132:
        !           133: void
        !           134: tsp_conf_write(cpv, tag, offset, data)
        !           135:        void *cpv;
        !           136:        pcitag_t tag;
        !           137:        int offset;
        !           138:        pcireg_t data;
        !           139: {
        !           140:        pcireg_t *datap;
        !           141:        struct tsp_config *pcp = cpv;
        !           142:
        !           143:        datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
        !           144:        alpha_mb();
        !           145:        *datap = data;
        !           146:        alpha_mb();
        !           147: }