1 /* $NetBSD: pci_machdep.c,v 1.7 2023/12/20 14:18:37 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1994 Charles M. Hannum. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Charles M. Hannum. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Machine-specific functions for PCI autoconfiguration. 35 * 36 * On PCs, there are two methods of generating PCI configuration cycles. 37 * We try to detect the appropriate mechanism for this machine and set 38 * up a few function pointers to access the correct method directly. 39 * 40 * The configuration method can be hard-coded in the config file by 41 * using `options PCI_CONF_MODE=N', where `N' is the configuration mode 42 * as defined section 3.6.4.1, `Generating Configuration Cycles'. 43 */ 44 45 #include <sys/cdefs.h> 46 __KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.7 2023/12/20 14:18:37 thorpej Exp $"); 47 48 #include <sys/param.h> 49 #include <sys/bus.h> 50 #include <sys/device.h> 51 #include <sys/errno.h> 52 #include <sys/extent.h> 53 #include <sys/intr.h> 54 #include <sys/queue.h> 55 #include <sys/systm.h> 56 #include <sys/time.h> 57 58 #include <uvm/uvm.h> 59 60 #define _POWERPC_BUS_DMA_PRIVATE 61 62 #include <dev/ic/cpc700reg.h> 63 64 #include <machine/pmppc.h> 65 #include <machine/pio.h> 66 67 #include <dev/pci/pcivar.h> 68 #include <dev/pci/pcireg.h> 69 #include <dev/pci/pcidevs.h> 70 #include <dev/pci/pciconf.h> 71 72 #include <evbppc/pmppc/dev/mainbus.h> 73 74 /* 75 * Address conversion as seen from a PCI master. 76 * XXX Shouldn't use 0x80000000, the actual value 77 * should come from the BAR. 78 */ 79 #define PHYS_TO_PCI_MEM(x) ((x) + 0x80000000) 80 #define PCI_MEM_TO_PHYS(x) ((x) - 0x80000000) 81 82 static bus_addr_t phys_to_pci(bus_dma_tag_t, bus_addr_t); 83 static bus_addr_t pci_to_phys(bus_dma_tag_t, bus_addr_t); 84 85 extern struct powerpc_bus_dma_tag pci_bus_dma_tag; 86 87 void 88 pmppc_pci_get_chipset_tag(pci_chipset_tag_t pc) 89 { 90 pc->pc_conf_v = (void *)pc; 91 92 pc->pc_attach_hook = genppc_pci_indirect_attach_hook; 93 pc->pc_bus_maxdevs = genppc_pci_bus_maxdevs; 94 pc->pc_make_tag = genppc_pci_indirect_make_tag; 95 pc->pc_conf_read = genppc_pci_indirect_conf_read; 96 pc->pc_conf_write = genppc_pci_indirect_conf_write; 97 98 pc->pc_intr_v = (void *)pc; 99 100 pc->pc_intr_map = pmppc_pci_intr_map; 101 pc->pc_intr_string = genppc_pci_intr_string; 102 pc->pc_intr_evcnt = genppc_pci_intr_evcnt; 103 pc->pc_intr_establish = genppc_pci_intr_establish; 104 pc->pc_intr_disestablish = genppc_pci_intr_disestablish; 105 pc->pc_intr_setattr = genppc_pci_intr_setattr; 106 pc->pc_intr_type = genppc_pci_intr_type; 107 pc->pc_intr_alloc = genppc_pci_intr_alloc; 108 pc->pc_intr_release = genppc_pci_intr_release; 109 pc->pc_intx_alloc = genppc_pci_intx_alloc; 110 111 pc->pc_msi_v = (void *)pc; 112 genppc_pci_chipset_msi_init(pc); 113 114 pc->pc_msix_v = (void *)pc; 115 genppc_pci_chipset_msix_init(pc); 116 117 pc->pc_conf_interrupt = pmppc_pci_conf_interrupt; 118 pc->pc_decompose_tag = genppc_pci_indirect_decompose_tag; 119 pc->pc_conf_hook = genppc_pci_conf_hook; 120 121 pc->pc_addr = mapiodev(CPC_PCICFGADR, 4, false); 122 pc->pc_data = mapiodev(CPC_PCICFGDATA, 4, false); 123 pc->pc_bus = 0; 124 pc->pc_node = 0; 125 pc->pc_memt = 0; 126 pc->pc_iot = 0; 127 128 /* the following two lines are required because unlike other ports, 129 * we cannot just add PHYS_TO_BUS_MEM/BUS_MEM_TO_PHYS defines to 130 * bus.h, because it would impact other evbppc ports. 131 */ 132 pci_bus_dma_tag._dma_phys_to_bus_mem = phys_to_pci; 133 pci_bus_dma_tag._dma_bus_mem_to_phys = pci_to_phys; 134 } 135 136 137 static bus_addr_t 138 phys_to_pci(bus_dma_tag_t t, bus_addr_t a) 139 { 140 return PHYS_TO_PCI_MEM(a); 141 } 142 143 static bus_addr_t pci_to_phys(bus_dma_tag_t t, bus_addr_t a) 144 { 145 return PCI_MEM_TO_PHYS(a); 146 } 147 148 int 149 pmppc_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 150 { 151 int pin = pa->pa_intrpin; 152 int line = pa->pa_intrline; 153 154 if (pin == 0) { 155 /* No IRQ used. */ 156 goto bad; 157 } 158 159 if (pin > 4) { 160 printf("pci_intr_map: bad interrupt pin %d\n", pin); 161 goto bad; 162 } 163 164 if (line == 255) { 165 printf("pci_intr_map: no mapping for pin %c\n", '@' + pin); 166 goto bad; 167 } 168 /*printf("pci_intr_map pin=%d line=%d\n", pin, line);*/ 169 170 switch (line & 3) { /* XXX what should this be? */ 171 case 0: *ihp = PMPPC_I_BPMC_INTA; break; 172 case 1: *ihp = PMPPC_I_BPMC_INTB; break; 173 case 2: *ihp = PMPPC_I_BPMC_INTC; break; 174 case 3: *ihp = PMPPC_I_BPMC_INTD; break; 175 } 176 return 0; 177 178 bad: 179 *ihp = -1; 180 return 1; 181 } 182 183 void 184 pmppc_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz, 185 int *iline) 186 { 187 int line; 188 189 line = (swiz + dev) & 3; 190 /* XXX UGLY UGLY, figure out the real interrupt mapping */ 191 if (bus==3&&dev==2&&pin==1&&swiz==3) line=2; 192 /* 193 printf("pci_conf_interrupt: bus=%d dev=%d pin=%d swiz=%d => line=%d\n", 194 bus, dev, pin, swiz, line); 195 */ 196 *iline = line; 197 } 198
Indexes created Sat Sep 27 14:09:57 GMT 2025