diff options
Diffstat (limited to 'src/mesa/drivers/dos/dpmi.c')
| -rw-r--r-- | src/mesa/drivers/dos/dpmi.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/src/mesa/drivers/dos/dpmi.c b/src/mesa/drivers/dos/dpmi.c deleted file mode 100644 index bd33b8856c..0000000000 --- a/src/mesa/drivers/dos/dpmi.c +++ /dev/null @@ -1,166 +0,0 @@ -/* - * 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 for Mesa - * - * Author: Daniel Borca - * 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 -} |