1 /* $OpenBSD: sti_pci_machdep.c,v 1.2 2009/04/10 17:11:27 miod Exp $ */ 2 3 /* 4 * Copyright (c) 2007, 2009 Miodrag Vallat. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice, this permission notice, and the disclaimer below 9 * appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/param.h> 21 #include <sys/systm.h> 22 #include <sys/device.h> 23 24 #include <machine/iomod.h> 25 #include <machine/autoconf.h> 26 27 #include <dev/pci/pcivar.h> 28 29 int sti_pci_is_console(struct pci_attach_args *, bus_addr_t *); 30 31 int 32 sti_pci_is_console(struct pci_attach_args *paa, bus_addr_t *bases) 33 { 34 u_int32_t cf; 35 bus_addr_t addr; 36 int bar; 37 int rc; 38 39 /* 40 * PAGE0 console information will point to one of our BARs, 41 * but depending on the particular sti model, this might not 42 * be the BAR mapping the rom (region #0). 43 * 44 * For example, on Visualize FXe, regions #0, #2 and #3 are 45 * mapped by BAR 0x18, while region #1 is mapped by BAR 0x10, 46 * which matches PAGE0 console address. 47 * 48 * Rather than trying to be smart, reread the region->BAR array 49 * again, and compare the BAR mapping region #1 against PAGE0 50 * values, we simply try all the valid BARs; if any of them 51 * matches what PAGE0 says, then we are the console, and it 52 * doesn't matter which BAR matched. 53 */ 54 for (bar = PCI_MAPREG_START; bar <= PCI_MAPREG_PPB_END; ) { 55 cf = pci_conf_read(paa->pa_pc, paa->pa_tag, bar); 56 57 if (PCI_MAPREG_TYPE(cf) == PCI_MAPREG_TYPE_IO) { 58 rc = pci_io_find(paa->pa_pc, paa->pa_tag, bar, &addr, 59 NULL); 60 bar += 4; 61 } else { 62 rc = pci_mem_find(paa->pa_pc, paa->pa_tag, bar, &addr, 63 NULL, NULL); 64 if (PCI_MAPREG_MEM_TYPE(cf) == 65 PCI_MAPREG_MEM_TYPE_64BIT) 66 bar += 8; 67 else 68 bar += 4; 69 } 70 71 if (rc == 0 && 72 (hppa_hpa_t)addr == (hppa_hpa_t)PAGE0->mem_cons.pz_hpa) 73 return 1; 74 } 75 76 return 0; 77 } 78