/* $NetBSD: pci_machdep.c,v 1.7 2023/12/20 14:18:37 thorpej Exp $ */ /* * 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. * * On PCs, there are two methods of generating PCI configuration cycles. * We try to detect the appropriate mechanism for this machine and set * up a few function pointers to access the correct method directly. * * The configuration method can be hard-coded in the config file by * using `options PCI_CONF_MODE=N', where `N' is the configuration mode * as defined section 3.6.4.1, `Generating Configuration Cycles'. */ #include __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.7 2023/12/20 14:18:37 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #define _POWERPC_BUS_DMA_PRIVATE #include #include #include #include #include #include #include #include /* * Address conversion as seen from a PCI master. * XXX Shouldn't use 0x80000000, the actual value * should come from the BAR. */ #define PHYS_TO_PCI_MEM(x) ((x) + 0x80000000) #define PCI_MEM_TO_PHYS(x) ((x) - 0x80000000) static bus_addr_t phys_to_pci(bus_dma_tag_t, bus_addr_t); static bus_addr_t pci_to_phys(bus_dma_tag_t, bus_addr_t); extern struct powerpc_bus_dma_tag pci_bus_dma_tag; void pmppc_pci_get_chipset_tag(pci_chipset_tag_t pc) { pc->pc_conf_v = (void *)pc; pc->pc_attach_hook = genppc_pci_indirect_attach_hook; pc->pc_bus_maxdevs = genppc_pci_bus_maxdevs; pc->pc_make_tag = genppc_pci_indirect_make_tag; pc->pc_conf_read = genppc_pci_indirect_conf_read; pc->pc_conf_write = genppc_pci_indirect_conf_write; pc->pc_intr_v = (void *)pc; pc->pc_intr_map = pmppc_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 = (void *)pc; genppc_pci_chipset_msi_init(pc); pc->pc_msix_v = (void *)pc; genppc_pci_chipset_msix_init(pc); pc->pc_conf_interrupt = pmppc_pci_conf_interrupt; pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag; pc->pc_conf_hook = genppc_pci_conf_hook; pc->pc_addr = mapiodev(CPC_PCICFGADR, 4, false); pc->pc_data = mapiodev(CPC_PCICFGDATA, 4, false); pc->pc_bus = 0; pc->pc_node = 0; pc->pc_memt = 0; pc->pc_iot = 0; /* the following two lines are required because unlike other ports, * we cannot just add PHYS_TO_BUS_MEM/BUS_MEM_TO_PHYS defines to * bus.h, because it would impact other evbppc ports. */ pci_bus_dma_tag._dma_phys_to_bus_mem = phys_to_pci; pci_bus_dma_tag._dma_bus_mem_to_phys = pci_to_phys; } static bus_addr_t phys_to_pci(bus_dma_tag_t t, bus_addr_t a) { return PHYS_TO_PCI_MEM(a); } static bus_addr_t pci_to_phys(bus_dma_tag_t t, bus_addr_t a) { return PCI_MEM_TO_PHYS(a); } int pmppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) { int pin = pa->pa_intrpin; int line = pa->pa_intrline; if (pin == 0) { /* No IRQ used. */ goto bad; } if (pin > 4) { printf("pci_intr_map: bad interrupt pin %d\n", pin); goto bad; } if (line == 255) { printf("pci_intr_map: no mapping for pin %c\n", '@' + pin); goto bad; } /*printf("pci_intr_map pin=%d line=%d\n", pin, line);*/ switch (line & 3) { /* XXX what should this be? */ case 0: *ihp = PMPPC_I_BPMC_INTA; break; case 1: *ihp = PMPPC_I_BPMC_INTB; break; case 2: *ihp = PMPPC_I_BPMC_INTC; break; case 3: *ihp = PMPPC_I_BPMC_INTD; break; } return 0; bad: *ihp = -1; return 1; } void pmppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz, int *iline) { int line; line = (swiz + dev) & 3; /* XXX UGLY UGLY, figure out the real interrupt mapping */ if (bus==3&&dev==2&&pin==1&&swiz==3) line=2; /* printf("pci_conf_interrupt: bus=%d dev=%d pin=%d swiz=%d => line=%d\n", bus, dev, pin, swiz, line); */ *iline = line; }