1 /* $NetBSD: genfb_machdep.c,v 1.23 2023/10/19 14:59:46 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Early attach support for raster consoles 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: genfb_machdep.c,v 1.23 2023/10/19 14:59:46 bouyer Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/conf.h> 38 #include <sys/device.h> 39 #include <sys/ioctl.h> 40 #include <sys/kernel.h> 41 #include <sys/kmem.h> 42 #include <sys/lwp.h> 43 44 #include <sys/bus.h> 45 #include <machine/bootinfo.h> 46 47 #include <dev/wscons/wsconsio.h> 48 #include <dev/wscons/wsdisplayvar.h> 49 #include <dev/rasops/rasops.h> 50 #include <dev/wsfont/wsfont.h> 51 #include <dev/wscons/wsdisplay_vconsvar.h> 52 53 #include <dev/wsfb/genfbvar.h> 54 #include <arch/x86/include/genfb_machdep.h> 55 #include <arch/xen/include/hypervisor.h> 56 #include <arch/xen/include/xen.h> 57 58 #include "wsdisplay.h" 59 #include "genfb.h" 60 #include "acpica.h" 61 #include "opt_xen.h" 62 63 #if NWSDISPLAY > 0 && NGENFB > 0 64 struct vcons_screen x86_genfb_console_screen; 65 bool x86_genfb_use_shadowfb = true; 66 67 static device_t x86_genfb_console_dev = NULL; 68 69 static struct wsscreen_descr x86_genfb_stdscreen = { 70 "std", 71 0, 0, 72 0, 73 0, 0, 74 0, 75 NULL 76 }; 77 78 void 79 x86_genfb_set_console_dev(device_t dev) 80 { 81 KASSERT(x86_genfb_console_dev == NULL); 82 x86_genfb_console_dev = dev; 83 } 84 85 void 86 x86_genfb_ddb_trap_callback(int where) 87 { 88 if (x86_genfb_console_dev == NULL) 89 return; 90 91 if (where) { 92 genfb_enable_polling(x86_genfb_console_dev); 93 } else { 94 genfb_disable_polling(x86_genfb_console_dev); 95 } 96 } 97 98 int 99 x86_genfb_init(void) 100 { 101 static int inited, attached; 102 struct rasops_info *ri = &x86_genfb_console_screen.scr_ri; 103 const struct btinfo_framebuffer *fbinfo = NULL; 104 bus_space_tag_t t = x86_bus_space_mem; 105 bus_space_handle_t h; 106 void *bits; 107 int err; 108 109 if (inited) 110 return attached; 111 inited = 1; 112 113 memset(&x86_genfb_console_screen, 0, sizeof(x86_genfb_console_screen)); 114 115 #if defined(XEN) && defined(DOM0OPS) 116 if ((vm_guest == VM_GUEST_XENPVH || vm_guest == VM_GUEST_XENPV) && 117 xendomain_is_dom0()) 118 fbinfo = xen_genfb_getbtinfo(); 119 #endif 120 if (fbinfo == NULL) 121 fbinfo = lookup_bootinfo(BTINFO_FRAMEBUFFER); 122 123 if (fbinfo == NULL || fbinfo->physaddr == 0) 124 return 0; 125 126 err = _x86_memio_map(t, (bus_addr_t)fbinfo->physaddr, 127 fbinfo->height * fbinfo->stride, 128 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE, &h); 129 if (err) { 130 aprint_error("x86_genfb_cnattach: couldn't map framebuffer\n"); 131 return 0; 132 } 133 134 bits = bus_space_vaddr(t, h); 135 if (bits == NULL) { 136 aprint_error("x86_genfb_cnattach: couldn't get fb vaddr\n"); 137 return 0; 138 } 139 140 #if NACPICA > 0 && !defined(XENPV) 141 acpi_md_vesa_modenum = fbinfo->vbemode; 142 #endif 143 144 wsfont_init(); 145 146 ri->ri_width = fbinfo->width; 147 ri->ri_height = fbinfo->height; 148 ri->ri_depth = fbinfo->depth; 149 ri->ri_stride = fbinfo->stride; 150 ri->ri_rnum = fbinfo->rnum; 151 ri->ri_gnum = fbinfo->gnum; 152 ri->ri_bnum = fbinfo->bnum; 153 ri->ri_rpos = fbinfo->rpos; 154 ri->ri_gpos = fbinfo->gpos; 155 ri->ri_bpos = fbinfo->bpos; 156 if (x86_genfb_use_shadowfb && lookup_bootinfo(BTINFO_EFI) != NULL) { 157 /* XXX The allocated memory is never released... */ 158 ri->ri_bits = kmem_alloc(ri->ri_stride * ri->ri_height, 159 KM_SLEEP); 160 ri->ri_hwbits = bits; 161 } else 162 ri->ri_bits = bits; 163 ri->ri_flg = RI_CENTER | RI_FULLCLEAR | RI_CLEAR; 164 rasops_init(ri, ri->ri_height / 8, ri->ri_width / 8); 165 ri->ri_caps = WSSCREEN_WSCOLORS; 166 rasops_reconfig(ri, ri->ri_height / ri->ri_font->fontheight, 167 ri->ri_width / ri->ri_font->fontwidth); 168 169 x86_genfb_stdscreen.nrows = ri->ri_rows; 170 x86_genfb_stdscreen.ncols = ri->ri_cols; 171 x86_genfb_stdscreen.textops = &ri->ri_ops; 172 x86_genfb_stdscreen.capabilities = ri->ri_caps; 173 174 attached = 1; 175 return 1; 176 } 177 178 int 179 x86_genfb_cnattach(void) 180 { 181 static int ncalls = 0; 182 struct rasops_info *ri = &x86_genfb_console_screen.scr_ri; 183 long defattr; 184 185 /* XXX jmcneill 186 * Defer console initialization until UVM is initialized 187 */ 188 ++ncalls; 189 if (ncalls < 3) 190 return -1; 191 192 if (!x86_genfb_init()) 193 return 0; 194 195 ri->ri_ops.allocattr(ri, 0, 0, 0, &defattr); 196 wsdisplay_preattach(&x86_genfb_stdscreen, ri, 0, 0, defattr); 197 198 return 1; 199 } 200 #else /* NWSDISPLAY > 0 && NGENFB > 0 */ 201 int 202 x86_genfb_init(void) 203 { 204 return 0; 205 } 206 207 int 208 x86_genfb_cnattach(void) 209 { 210 return 0; 211 } 212 #endif 213
Indexes created Tue Sep 23 07:09:52 GMT 2025