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      1 /*	$NetBSD: pci_machdep.c,v 1.6 2018/03/01 23:01:19 scole Exp $	*/
      2 /*
      3  * Copyright (c) 2009, 2010 KIYOHARA Takashi
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.6 2018/03/01 23:01:19 scole Exp $");
     29 
     30 #include <machine/bus.h>
     31 #include <machine/sal.h>
     32 
     33 #include <dev/pci/pcivar.h>
     34 #include <dev/pci/pcireg.h>
     35 #include <dev/pci/pcidevs.h>
     36 
     37 
     38 void
     39 pci_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba)
     40 {
     41 
     42 	/* Nothing */
     43 }
     44 
     45 int
     46 pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
     47 {
     48 
     49 	 return 32;	/* 32 device/bus */
     50 }
     51 
     52 pcitag_t
     53 pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
     54 {
     55 
     56 #if DIAGNOSTIC
     57 	if (bus >= 256 || device >= 32 || function >= 8)
     58 		panic("%s: bad request", __func__);
     59 #endif
     60 
     61 	return (bus << 16) | (device << 11) | (function << 8);
     62 }
     63 
     64 void
     65 pci_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp, int *fp)
     66 {
     67 
     68 	if (bp != NULL)
     69 		*bp = (tag >> 16) & 0xff;
     70 	if (dp != NULL)
     71 		*dp = (tag >> 11) & 0x1f;
     72 	if (fp != NULL)
     73 		*fp = (tag >> 8) & 0x07;
     74 }
     75 
     76 pcireg_t
     77 pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
     78 {
     79 	struct ia64_sal_result res;
     80 
     81 	if ((unsigned int)reg >= PCI_CONF_SIZE)
     82 		return -1;
     83 
     84 	res = ia64_sal_entry(SAL_PCI_CONFIG_READ,
     85 	    tag | reg, sizeof(pcireg_t), 0, 0, 0, 0, 0);
     86 	if (res.sal_status < 0)
     87 		return -1;
     88 	else
     89 		return res.sal_result[0];
     90 }
     91 
     92 void
     93 pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t val)
     94 {
     95 	struct ia64_sal_result res;
     96 
     97 	if ((unsigned int)reg >= PCI_CONF_SIZE)
     98 		return;
     99 
    100 	res = ia64_sal_entry(SAL_PCI_CONFIG_WRITE,
    101 	    tag | reg, sizeof(pcireg_t), val, 0, 0, 0, 0);
    102 	if (res.sal_status < 0)
    103 		printf("pci configuration write failed\n");
    104 }
    105