/* $NetBSD: prep_pciconf_direct.c,v 1.10 2016/10/19 00:08:42 nonaka Exp $ */ /* * Copyright (c) 2002 Klaus J. Klein. All rights reserved. * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. * Copyright (c) 1994 Charles M. Hannum. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles M. Hannum. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Machine-specific functions for PCI autoconfiguration. * * This version is specific to the direct-mapped configuration space access * such as implemented on the IBM 27-82650 PCI Bridge/Memory Controller. */ #include __KERNEL_RCSID(0, "$NetBSD: prep_pciconf_direct.c,v 1.10 2016/10/19 00:08:42 nonaka Exp $"); #include #include #include #include #include #include #include #define _POWERPC_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include #include #ifdef DEBUG #define DPRINTF(x) aprint_debug x #else #define DPRINTF(x) #endif /* Physical base address and size of PCI configuration space. */ #define PCI_DCONF_BASE 0x80800000 #define PCI_DCONF_SIZE 0x00800000 /* Device function selection. */ #define PCI_DCONF_FUNC 0x00000700 #define PCI_DCONF_FUNC_SHIFT 8 /* Configuration space register selection. */ #define PCI_DCONF_REG 0x000000ff #define PCI_DCONF_REG_SHIFT 0 /* Device selection; those bits still available. */ #define PCI_DCONF_DEV \ (~(~(PCI_DCONF_SIZE - 1) | PCI_DCONF_FUNC | PCI_DCONF_REG)) void prep_pci_direct_attach_hook(device_t, device_t, struct pcibus_attach_args *); pcitag_t prep_pci_direct_make_tag(void *, int, int, int); pcireg_t prep_pci_direct_conf_read(void *, pcitag_t, int); void prep_pci_direct_conf_write(void *, pcitag_t, int, pcireg_t); void prep_pci_direct_decompose_tag(void *, pcitag_t, int *, int *, int *); void prep_pci_get_chipset_tag_direct(pci_chipset_tag_t pc) { pc->pc_conf_v = NULL; pc->pc_attach_hook = prep_pci_direct_attach_hook; pc->pc_bus_maxdevs = prep_pci_bus_maxdevs; pc->pc_make_tag = prep_pci_direct_make_tag; pc->pc_conf_read = prep_pci_direct_conf_read; pc->pc_conf_write = prep_pci_direct_conf_write; pc->pc_intr_v = NULL; pc->pc_intr_map = prep_pci_intr_map; pc->pc_intr_string = genppc_pci_intr_string; pc->pc_intr_evcnt = genppc_pci_intr_evcnt; pc->pc_intr_establish = genppc_pci_intr_establish; pc->pc_intr_disestablish = genppc_pci_intr_disestablish; pc->pc_intr_setattr = genppc_pci_intr_setattr; pc->pc_intr_type = genppc_pci_intr_type; pc->pc_intr_alloc = genppc_pci_intr_alloc; pc->pc_intr_release = genppc_pci_intr_release; pc->pc_intx_alloc = genppc_pci_intx_alloc; pc->pc_msi_v = NULL; genppc_pci_chipset_msi_init(pc); pc->pc_msix_v = NULL; genppc_pci_chipset_msix_init(pc); pc->pc_conf_interrupt = genppc_pci_conf_interrupt; pc->pc_decompose_tag = prep_pci_direct_decompose_tag; pc->pc_conf_hook = prep_pci_conf_hook; } void prep_pci_direct_attach_hook(device_t parent, device_t self, struct pcibus_attach_args *pba) { if (pba->pba_bus == 0) aprint_normal(": direct-mapped configuration space access"); } pcitag_t prep_pci_direct_make_tag(void *v, int bus, int device, int function) { pcitag_t tag; if (bus >= 256 || device >= 32 || function >= 8) panic("prep_pci_direct_make_tag: bad request"); tag = (bus << 16) | (device << 11) | (function << 8); return tag; } void prep_pci_direct_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp) { if (bp != NULL) *bp = (tag >> 16) & 0xff; if (dp != NULL) *dp = (tag >> 11) & 0x1f; if (fp != NULL) *fp = (tag >> 8) & 0x7; return; } pcireg_t prep_pci_direct_conf_read(void *v, pcitag_t tag, int reg) { pcireg_t data; int bus, device, function; int s; if ((unsigned int)reg >= PCI_CONF_SIZE) return (pcireg_t) ~0; prep_pci_direct_decompose_tag(v, tag, &bus, &device, &function); if (bus == 0) { /* Check if device selector is within selector range. */ if (1 << device & ~PCI_DCONF_DEV) { data = ~0; goto out; } tag = (1 << device) | (function << PCI_DCONF_FUNC_SHIFT); } s = splhigh(); data = in32rb(PCI_DCONF_BASE | tag | reg); splx(s); out: return data; } void prep_pci_direct_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) { int bus, device, function; int s; DPRINTF(("prep_pci_direct_conf_write(0x%lx, 0x%x, 0x%02x, 0x%08lx) ", (unsigned long)v, tag, reg, (unsigned long)data)); if ((unsigned int)reg >= PCI_CONF_SIZE) return; prep_pci_direct_decompose_tag(v, tag, &bus, &device, &function); if (bus == 0) { /* Check if device selector is within selector range. */ if (1 << device & ~PCI_DCONF_DEV) { /* Should never happen. */ panic("prep_pci_direct_conf_write: bad device %d", device); } tag = (1 << device) | (function << PCI_DCONF_FUNC_SHIFT); } s = splhigh(); out32rb(PCI_DCONF_BASE | tag | reg, data); splx(s); }