diff options
Diffstat (limited to 'nx-X11/extras/drm/linux/drm_init.h')
| -rw-r--r-- | nx-X11/extras/drm/linux/drm_init.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/nx-X11/extras/drm/linux/drm_init.h b/nx-X11/extras/drm/linux/drm_init.h new file mode 100644 index 000000000..ae6ecbf98 --- /dev/null +++ b/nx-X11/extras/drm/linux/drm_init.h @@ -0,0 +1,128 @@ +/** + * \file drm_init.h + * Setup/Cleanup for DRM + * + * \author Rickard E. (Rik) Faith <faith@valinux.com> + * \author Gareth Hughes <gareth@valinux.com> + */ + +/* + * Created: Mon Jan 4 08:58:31 1999 by faith@valinux.com + * + * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. + * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * 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 + * VA LINUX SYSTEMS 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. + */ + +#include "drmP.h" + +/** Debug flags. Set by parse_option(). */ +#if 0 +int DRM(flags) = DRM_FLAG_DEBUG; +#else +int DRM(flags) = 0; +#endif + +/** + * Parse a single option. + * + * \param s option string. + * + * \sa See parse_options() 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, "debug")) { + DRM(flags) |= DRM_FLAG_DEBUG; + DRM_INFO("Debug messages ON\n"); + return; + } + DRM_ERROR("\"%s\" is not a valid option\n", s); + return; +} + +/** + * Parse the insmod "drm_opts=" options, or the command-line + * options passed to the kernel via LILO. + * + * \param s contains option_list without the 'drm_opts=' part. + * + * The grammar of the format is as + * follows: + * + * \code + * drm ::= 'drm_opts=' option_list + * option_list ::= option [ ';' option_list ] + * option ::= 'device:' major + * | 'debug' + * | 'noctx' + * major ::= INTEGER + * \endcode + * + * - 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 + * + * \todo Actually only the \e presence of the 'debug' option is currently + * checked. + */ + +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 */ + } +} + +/** + * Check whether DRI will run on this CPU. + * + * \return non-zero if the DRI will run on this CPU, or zero otherwise. + */ +int DRM(cpu_valid)(void) +{ +#if defined(__i386__) + if (boot_cpu_data.x86 == 3) return 0; /* No cmpxchg on a 386 */ +#endif +#if defined(__sparc__) && !defined(__sparc_v9__) + return 0; /* No cmpxchg before v9 sparc. */ +#endif + return 1; +} |