diff options
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/dpmi.c')
| -rw-r--r-- | nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/dpmi.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/dpmi.c b/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/dpmi.c new file mode 100644 index 000000000..b2cef04ac --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.2/src/mesa/drivers/dos/dpmi.c @@ -0,0 +1,166 @@ +/* + * Mesa 3-D graphics library + * Version: 4.0 + * + * Copyright (C) 1999 Brian Paul 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 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 + * BRIAN PAUL 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. + */ + +/* + * DOS/DJGPP device driver v1.5 for Mesa + * + * Copyright (C) 2002 - Borca Daniel + * Email : dborca@yahoo.com + * Web : http://www.geocities.com/dborca + */ + + +#include <dpmi.h> + +#include "internal.h" + + +#ifndef MAX +#define MAX(x, y) (((x) < (y)) ? (y) : (x)) +#endif + + +/* _create_linear_mapping: + * Maps a physical address range into linear memory. + */ +int +_create_linear_mapping (unsigned long *linear, unsigned long physaddr, int size) +{ + __dpmi_meminfo meminfo; + + if (physaddr >= 0x100000) { + /* map into linear memory */ + meminfo.address = physaddr; + meminfo.size = size; + if (__dpmi_physical_address_mapping(&meminfo) != 0) { + return -1; + } + + *linear = meminfo.address; + } else { + /* exploit 1 -> 1 physical to linear mapping in low megabyte */ + *linear = physaddr; + } + + return 0; +} + + +/* _remove_linear_mapping: + * Frees the DPMI resources being used to map a linear address range. + */ +void +_remove_linear_mapping (unsigned long *linear) +{ + __dpmi_meminfo meminfo; + + if (*linear) { + if (*linear >= 0x100000) { + meminfo.address = *linear; + __dpmi_free_physical_address_mapping(&meminfo); + } + + *linear = 0; + } +} + + +/* _create_selector: + * Allocates a selector to access a region of linear memory. + */ +int +_create_selector (int *segment, unsigned long base, int size) +{ + /* allocate an ldt descriptor */ + if ((*segment=__dpmi_allocate_ldt_descriptors(1)) < 0) { + *segment = 0; + return -1; + } + + /* create the linear mapping */ + if (_create_linear_mapping(&base, base, size)) { + __dpmi_free_ldt_descriptor(*segment); + *segment = 0; + return -1; + } + + /* set the descriptor base and limit */ + __dpmi_set_segment_base_address(*segment, base); + __dpmi_set_segment_limit(*segment, MAX(size-1, 0xFFFF)); + + return 0; +} + + +/* _remove_selector: + * Frees a DPMI segment selector. + */ +void +_remove_selector (int *segment) +{ + if (*segment) { + unsigned long base; + __dpmi_get_segment_base_address(*segment, &base); + _remove_linear_mapping(&base); + __dpmi_free_ldt_descriptor(*segment); + *segment = 0; + } +} + + +/* Desc: retrieve CPU MMX capability + * + * In : - + * Out : FALSE if CPU cannot do MMX + * + * Note: - + */ +int +_can_mmx (void) +{ +#ifdef USE_MMX_ASM + int x86_cpu_features = 0; + __asm("\n\ + pushfl \n\ + popl %%eax \n\ + movl %%eax, %%ecx \n\ + xorl $0x200000, %%eax\n\ + pushl %%eax \n\ + popfl \n\ + pushfl \n\ + popl %%eax \n\ + pushl %%ecx \n\ + popfl \n\ + xorl %%ecx, %%eax \n\ + jz 0f \n\ + movl $1, %%eax \n\ + cpuid \n\ + movl %%edx, %0 \n\ + 0: \n\ + ":"=g"(x86_cpu_features)::"%eax", "%ebx", "%ecx", "%edx"); + return (x86_cpu_features & 0x00800000); +#else + return 0; +#endif +} |