diff options
Diffstat (limited to 'hw/xfree86/os-support/lynxos/lynx_video.c')
| -rw-r--r-- | hw/xfree86/os-support/lynxos/lynx_video.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/hw/xfree86/os-support/lynxos/lynx_video.c b/hw/xfree86/os-support/lynxos/lynx_video.c new file mode 100644 index 000000000..94b2f0ecd --- /dev/null +++ b/hw/xfree86/os-support/lynxos/lynx_video.c @@ -0,0 +1,167 @@ +/* + * Copyright 1993 by Thomas Mueller + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of Thomas Mueller not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. Thomas Mueller makes no representations + * about the suitability of this software for any purpose. It is provided + * "as is" without express or implied warranty. + * + * THOMAS MUELLER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THOMAS MUELLER BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + * + */ + +/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/lynxos/lynx_video.c,v 3.2.4.1 1997/05/09 07:15:24 hohndel Exp $ */ + +#include "X.h" +#include "input.h" +#include "scrnintstr.h" + +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86_OSlib.h" + +/***************************************************************************/ +/* Video Memory Mapping section */ +/***************************************************************************/ + +typedef struct +{ + char name[16]; + pointer Base; + long Size; + char *ptr; + int RefCnt; +} +_SMEMS; + +#define MAX_SMEMS 8 + +static _SMEMS smems[MAX_SMEMS]; + +static void +smemCleanup() +{ + int i; + + for (i = 0; i < MAX_SMEMS; i++) { + if (*smems[i].name && smems[i].ptr) { + (void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH); + (void)smem_remove(smems[i].name); + *smems[i].name = '\0'; + smems[i].ptr = NULL; + smems[i].Base = NULL; + smems[i].Size = 0; + smems[i].RefCnt = 0; + } + } +} + +pointer xf86MapVidMem(ScreenNum, Region, Base, Size) +int ScreenNum; +int Region; +pointer Base; +unsigned long Size; +{ + static int once; + int free_slot = -1; + int i; + + if (!once) + { + atexit(smemCleanup); + once = 1; + } + for (i = 0; i < MAX_SMEMS; i++) + { + if (!*smems[i].name && free_slot == -1) + free_slot = i; + if (smems[i].Base == Base && smems[i].Size == Size && *smems[i].name) { + smems[i].RefCnt++; + return smems[i].ptr; + } + } + if (i == MAX_SMEMS && free_slot == -1) + { + FatalError("xf86MapVidMem: failed to smem_create Base %x Size %x (out of SMEMS entries)\n", + Base, Size); + } + + i = free_slot; + sprintf(smems[i].name, "Video-%d", i); + smems[i].Base = Base; + smems[i].Size = Size; + smems[i].ptr = smem_create(smems[i].name, Base, Size, SM_READ|SM_WRITE); + smems[i].RefCnt = 1; + if (smems[i].ptr == NULL) + { + /* check if there is a stale segment around */ + if (smem_remove(smems[i].name) == 0) { + ErrorF("xf86MapVidMem: removed stale smem_ segment %s\n", + smems[i].name); + smems[i].ptr = smem_create(smems[i].name, + Base, Size, SM_READ|SM_WRITE); + } + if (smems[i].ptr == NULL) { + *smems[i].name = '\0'; + FatalError("xf86MapVidMem: failed to smem_create Base %x Size %x (%s)\n", + Base, Size, strerror(errno)); + } + } + return smems[i].ptr; +} + +void xf86UnMapVidMem(ScreenNum, Region, Base, Size) +int ScreenNum; +int Region; +pointer Base; +unsigned long Size; +{ + int i; + + for (i = 0; i < MAX_SMEMS; i++) + { + if (*smems[i].name && smems[i].ptr == Base && smems[i].Size == Size) + { + if (--smems[i].RefCnt > 0) + return; + (void)smem_create(NULL, smems[i].ptr, 0, SM_DETACH); + (void)smem_remove(smems[i].name); + *smems[i].name = '\0'; + smems[i].RefCnt = 0; + return; + } + } + ErrorF("xf86UnMapVidMem: no SMEM found for Base = %lx Size = %lx\n", Base, Size); +} + +Bool xf86LinearVidMem() +{ + return(TRUE); +} + + +/***************************************************************************/ +/* Interrupt Handling section */ +/***************************************************************************/ + +Bool xf86DisableInterrupts() +{ + return(TRUE); +} + +void xf86EnableInterrupts() +{ + return; +} + |