/* $NetBSD: pci_machdep.c,v 1.10 2003/11/07 17:12:56 augustss 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 1.10 2003/11/07 17:12:56 augustss Exp $"); #include #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); struct powerpc_bus_dma_tag pci_bus_dma_tag = { 0, /* _bounce_thresh */ _bus_dmamap_create, _bus_dmamap_destroy, _bus_dmamap_load, _bus_dmamap_load_mbuf, _bus_dmamap_load_uio, _bus_dmamap_load_raw, _bus_dmamap_unload, NULL, /* _dmamap_sync */ _bus_dmamem_alloc, _bus_dmamem_free, _bus_dmamem_map, _bus_dmamem_unmap, _bus_dmamem_mmap, phys_to_pci, 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); } void pci_attach_hook(struct device *parent, struct device *self, struct pcibus_attach_args *pba) { } int pci_bus_maxdevs(pci_chipset_tag_t pc, int busno) { /* * Bus number is irrelevant. Configuration Mechanism 1 is in * use, can have devices 0-32 (i.e. the `normal' range). */ return (32); } pcitag_t pci_make_tag(pci_chipset_tag_t pc, int bus, int device, int function) { pcitag_t tag; if (bus >= 256 || device >= 32 || function >= 8) panic("pci_make_tag: bad request"); tag = CPC_PCI_CONFIG_ENABLE | (bus << 16) | (device << 11) | (function << 8); return (tag); } void pci_decompose_tag(pci_chipset_tag_t pc, 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; } #define SP_PCI(tag, reg) ((tag) | (reg)) pcireg_t pci_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg) { pcireg_t data; struct faultbuf env, *oldfault; oldfault = curpcb->pcb_onfault; if (setfault(&env)) { curpcb->pcb_onfault = oldfault; return 0; } /*printf("pci_conf_read %x %x\n", tag, reg);*/ out32rb(CPC_PCICFGADR, SP_PCI(tag, reg)); data = in32rb(CPC_PCICFGDATA); /*out32rb(CPC_PCICFGADR, 0);*/ curpcb->pcb_onfault = oldfault; return data; } void pci_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg, pcireg_t data) { struct faultbuf env, *oldfault; oldfault = curpcb->pcb_onfault; if (setfault(&env)) { curpcb->pcb_onfault = oldfault; return; } /*printf("pci_conf_write %x %x %x\n", tag, reg, data);*/ out32rb(CPC_PCICFGADR, SP_PCI(tag, reg)); out32rb(CPC_PCICFGDATA, data); /*out32rb(CPC_PCICFGADR, 0);*/ curpcb->pcb_onfault = oldfault; } int pci_intr_map(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; } const char * pci_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih) { static char irqstr[8]; /* 4 + 2 + NULL + sanity */ if (ih < 0 || ih >= ICU_LEN) panic("pci_intr_string: bogus handle 0x%x", ih); sprintf(irqstr, "irq %d", ih); return (irqstr); } const struct evcnt * pci_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih) { /* XXX for now, no evcnt parent reported */ return NULL; } void * pci_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level, int (*func)(void *), void *arg) { /* * ih is the value assigned in pci_intr_map(), above. */ return intr_establish(ih, IST_LEVEL, level, func, arg); } void pci_intr_disestablish(pci_chipset_tag_t pc, void *cookie) { intr_disestablish(cookie); } void pci_conf_interrupt(pci_chipset_tag_t pc, 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; }