5410bbdb16
as direct-mapped PCI configuration space access (such as implemented on the IBM 27-82650 PCI Host Bridge), switch to a function vector based PCI configuration space access implementation. The appropriate PCI chipset tag is provided by platform-specific code.
158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
/* $NetBSD: prep_pciconf_indirect.c,v 1.1 2002/02/24 13:19:08 kleink Exp $ */
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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* Copyright (c) 1994 Charles M. Hannum. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles M. Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Machine-specific functions for PCI autoconfiguration.
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*
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* On PCs, there are two methods of generating PCI configuration cycles.
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* We try to detect the appropriate mechanism for this machine and set
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* up a few function pointers to access the correct method directly.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <uvm/uvm_extern.h>
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#define _POWERPC_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <machine/platform.h>
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#include <dev/isa/isavar.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcidevs.h>
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#define PCI_MODE1_ENABLE 0x80000000UL
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#define PCI_MODE1_ADDRESS_REG (PREP_BUS_SPACE_IO + 0xcf8)
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#define PCI_MODE1_DATA_REG (PREP_BUS_SPACE_IO + 0xcfc)
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void prep_pci_indirect_attach_hook(struct device *, struct device *,
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struct pcibus_attach_args *);
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pcitag_t prep_pci_indirect_make_tag(void *, int, int, int);
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pcireg_t prep_pci_indirect_conf_read(void *, pcitag_t, int);
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void prep_pci_indirect_conf_write(void *, pcitag_t, int, pcireg_t);
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void prep_pci_indirect_decompose_tag(void *, pcitag_t, int *, int *, int *);
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void
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prep_pci_get_chipset_tag_indirect(pci_chipset_tag_t pc)
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{
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pc->pc_conf_v = NULL;
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pc->pc_attach_hook = prep_pci_indirect_attach_hook;
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pc->pc_bus_maxdevs = prep_pci_bus_maxdevs;
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pc->pc_make_tag = prep_pci_indirect_make_tag;
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pc->pc_conf_read = prep_pci_indirect_conf_read;
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pc->pc_conf_write = prep_pci_indirect_conf_write;
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pc->pc_intr_v = NULL;
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pc->pc_intr_map = prep_pci_intr_map;
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pc->pc_intr_string = prep_pci_intr_string;
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pc->pc_intr_evcnt = prep_pci_intr_evcnt;
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pc->pc_intr_establish = prep_pci_intr_establish;
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pc->pc_intr_disestablish = prep_pci_intr_disestablish;
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pc->pc_conf_interrupt = prep_pci_conf_interrupt;
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pc->pc_decompose_tag = prep_pci_indirect_decompose_tag;
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pc->pc_conf_hook = prep_pci_conf_hook;
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}
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void
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prep_pci_indirect_attach_hook(struct device *parent, struct device *self,
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struct pcibus_attach_args *pba)
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{
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if (pba->pba_bus == 0)
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printf(": indirect configuration space access");
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}
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pcitag_t
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prep_pci_indirect_make_tag(void *v, int bus, int device, int function)
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{
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pcitag_t tag;
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if (bus >= 256 || device >= 32 || function >= 8)
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panic("pci_make_tag: bad request");
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tag = PCI_MODE1_ENABLE |
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(bus << 16) | (device << 11) | (function << 8);
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return tag;
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}
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void
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prep_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
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int *fp)
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{
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if (bp != NULL)
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*bp = (tag >> 16) & 0xff;
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if (dp != NULL)
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*dp = (tag >> 11) & 0x1f;
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if (fp != NULL)
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*fp = (tag >> 8) & 0x7;
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return;
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}
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pcireg_t
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prep_pci_indirect_conf_read(void *v, pcitag_t tag, int reg)
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{
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pcireg_t data;
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int s;
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s = splhigh();
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out32rb(PCI_MODE1_ADDRESS_REG, tag | reg);
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data = in32rb(PCI_MODE1_DATA_REG);
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out32rb(PCI_MODE1_ADDRESS_REG, 0);
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splx(s);
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return data;
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}
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void
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prep_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
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{
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int s;
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s = splhigh();
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out32rb(PCI_MODE1_ADDRESS_REG, tag | reg);
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out32rb(PCI_MODE1_DATA_REG, data);
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out32rb(PCI_MODE1_ADDRESS_REG, 0);
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splx(s);
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}
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