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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | /* init.c -- Setup/Cleanup for DRM -*- linux-c -*- * Created: Mon Jan 4 08:58:31 1999 by faith@precisioninsight.com * Revised: Fri Aug 20 09:27:02 1999 by faith@precisioninsight.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * $PI: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/init.c,v 1.3 1999/08/20 15:07:01 faith Exp $ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/init.c,v 1.1 1999/09/25 14:38:01 dawes Exp $ * */ #define __NO_VERSION__ #include "drmP.h" int drm_flags = 0; /* drm_parse_option parses a single option. See description for drm_parse_drm for details. */ static void drm_parse_option(char *s) { char *c, *r; DRM_DEBUG("\"%s\"\n", s); if (!s || !*s) return; for (c = s; *c && *c != ':'; c++); /* find : or \0 */ if (*c) r = c + 1; else r = NULL; /* remember remainder */ *c = '\0'; /* terminate */ if (!strcmp(s, "noctx")) { drm_flags |= DRM_FLAG_NOCTX; DRM_INFO("Server-mediated context switching OFF\n"); return; } if (!strcmp(s, "debug")) { drm_flags |= DRM_FLAG_DEBUG; DRM_INFO("Debug messages ON\n"); return; } DRM_ERROR("\"%s\" is not a valid option\n", s); return; } /* drm_parse_options parse the insmod "drm=" options, or the command-line * options passed to the kernel via LILO. The grammar of the format is as * follows: * * drm ::= 'drm=' option_list * option_list ::= option [ ';' option_list ] * option ::= 'device:' major * | 'debug' * | 'noctx' * major ::= INTEGER * * Note that 's' contains option_list without the 'drm=' part. * * device=major,minor specifies the device number used for /dev/drm * if major == 0 then the misc device is used * if major == 0 and minor == 0 then dynamic misc allocation is used * debug=on specifies that debugging messages will be printk'd * debug=trace specifies that each function call will be logged via printk * debug=off turns off all debugging options * */ void drm_parse_options(char *s) { char *h, *t, *n; DRM_DEBUG("\"%s\"\n", s ?: ""); if (!s || !*s) return; for (h = t = n = s; h && *h; h = n) { for (; *t && *t != ';'; t++); /* find ; or \0 */ if (*t) n = t + 1; else n = NULL; /* remember next */ *t = '\0'; /* terminate */ drm_parse_option(h); /* parse */ } } /* drm_cpu_valid returns non-zero if the DRI will run on this CPU, and 0 * otherwise. */ int drm_cpu_valid(void) { #if defined(__i386__) if (boot_cpu_data.x86 == 3) return 0; /* No cmpxchg on a 386 */ #endif return 1; } |