/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/bsd/arm_video.c,v 1.1tsi Exp $ */ /* * Copyright 1992 by Rich Murphey * Copyright 1993 by David Wexelblat * * 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 names of Rich Murphey and David Wexelblat * not be used in advertising or publicity pertaining to distribution of * the software without specific, written prior permission. Rich Murphey and * David Wexelblat make no representations about the suitability of this * software for any purpose. It is provided "as is" without express or * implied warranty. * * RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT 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. * */ /* * The ARM32 code here carries the following copyright: * * Copyright 1997 * Digital Equipment Corporation. All rights reserved. * This software is furnished under license and may be used and copied only in * accordance with the following terms and conditions. Subject to these * conditions, you may download, copy, install, use, modify and distribute * this software in source and/or binary form. No title or ownership is * transferred hereby. * * 1) Any source code used, modified or distributed must reproduce and retain * this copyright notice and list of conditions as they appear in the * source file. * * 2) No right is granted to use any trade name, trademark, or logo of Digital * Equipment Corporation. Neither the "Digital Equipment Corporation" * name nor any trademark or logo of Digital Equipment Corporation may be * used to endorse or promote products derived from this software without * the prior written permission of Digital Equipment Corporation. * * 3) This software is provided "AS-IS" and any express or implied warranties, * including but not limited to, any implied warranties of merchantability, * fitness for a particular purpose, or non-infringement are disclaimed. * In no event shall DIGITAL be liable for any damages whatsoever, and in * particular, DIGITAL shall not be liable for special, indirect, * consequential, or incidental damages or damages for lost profits, loss * of revenue or loss of use, whether such damages arise in contract, * negligence, tort, under statute, in equity, at law or otherwise, even * if advised of the possibility of such damage. * */ /* $XConsortium: bsd_video.c /main/10 1996/10/25 11:37:57 kaleb $ */ #include "X.h" #include "xf86.h" #include "xf86Priv.h" #include "xf86_OSlib.h" #include "xf86OSpriv.h" #ifdef __arm32__ #include "machine/devmap.h" struct memAccess { int ioctl; struct map_info memInfo; pointer regionVirtBase; Bool Checked; Bool OK; }; static pointer xf86MapInfoMap(); static void xf86MapInfoUnmap(); static struct memAccess *checkMapInfo(); extern int vgaPhysLinearBase; /* A memAccess structure is needed for each possible region */ struct memAccess vgaMemInfo = { CONSOLE_GET_MEM_INFO, NULL, NULL, FALSE, FALSE }; struct memAccess linearMemInfo = { CONSOLE_GET_LINEAR_INFO, NULL, NULL, FALSE, FALSE }; struct memAccess ioMemInfo = { CONSOLE_GET_IO_INFO, NULL, NULL, FALSE, FALSE }; #endif /* __arm32__ */ #if defined(__NetBSD__) && !defined(MAP_FILE) #define MAP_FLAGS MAP_SHARED #else #define MAP_FLAGS (MAP_FILE | MAP_SHARED) #endif #ifndef MAP_FAILED #define MAP_FAILED ((caddr_t)-1) #endif #define BUS_BASE 0L #define BUS_BASE_BWX 0L /***************************************************************************/ /* Video Memory Mapping section */ /***************************************************************************/ static Bool useDevMem = FALSE; static int devMemFd = -1; #define DEV_MEM "/dev/mem" static pointer mapVidMem(int, unsigned long, unsigned long, int); static void unmapVidMem(int, pointer, unsigned long); /* * Check if /dev/mem can be mmap'd. If it can't print a warning when * "warn" is TRUE. */ static void checkDevMem(Bool warn) { static Bool devMemChecked = FALSE; int fd; pointer base; if (devMemChecked) return; devMemChecked = TRUE; if ((fd = open(DEV_MEM, O_RDWR)) >= 0) { /* Try to map a page at the VGA address */ base = mmap((caddr_t)0, 4096, PROT_READ | PROT_WRITE, MAP_FLAGS, fd, (off_t)0xA0000 + BUS_BASE); if (base != MAP_FAILED) { munmap((caddr_t)base, 4096); devMemFd = fd; useDevMem = TRUE; return; } else { /* This should not happen */ if (warn) { xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n", DEV_MEM, strerror(errno)); } useDevMem = FALSE; return; } } if (warn) { xf86Msg(X_WARNING, "checkDevMem: failed to open %s (%s)\n", DEV_MEM, strerror(errno)); } useDevMem = FALSE; return; } void xf86OSInitVidMem(VidMemInfoPtr pVidMem) { checkDevMem(TRUE); pVidMem->linearSupported = useDevMem; pVidMem->mapMem = armMapVidMem; pVidMem->unmapVidMem = armUnmapVidMem; pVidMem->initialised = TRUE; } static pointer mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags) { pointer base; checkDevMem(FALSE); if (useDevMem) { if (devMemFd < 0) { FatalError("xf86MapVidMem: failed to open %s (%s)\n", DEV_MEM, strerror(errno)); } base = mmap((caddr_t)0, Size, (flags & VIDMEM_READONLY) ? PROT_READ : (PROT_READ | PROT_WRITE), MAP_FLAGS, devMemFd, (off_t)Base + BUS_BASE_BWX); if (base == MAP_FAILED) { FatalError("%s: could not mmap %s [s=%x,a=%x] (%s)\n", "xf86MapVidMem", DEV_MEM, Size, Base, strerror(errno)); } return(base); } /* else, mmap /dev/vga */ if ((unsigned long)Base < 0xA0000 || (unsigned long)Base >= 0xC0000) { FatalError("%s: Address 0x%x outside allowable range\n", "xf86MapVidMem", Base); } base = mmap(0, Size, (flags & VIDMEM_READONLY) ? PROT_READ : (PROT_READ | PROT_WRITE), MAP_FLAGS, xf86Info.screenFd, (unsigned long)Base - 0xA0000); if (base == MAP_FAILED) { FatalError("xf86MapVidMem: Could not mmap /dev/vga (%s)\n", strerror(errno)); } return(base); } static void unmapVidMem(int ScreenNum, pointer Base, unsigned long Size) { munmap((caddr_t)Base, Size); } /* * Read BIOS via mmap()ing DEV_MEM */ int xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, int Len) { unsigned char *ptr; int psize; int mlen; checkDevMem(TRUE); if (devMemFd == -1) { return(-1); } psize = xf86getpagesize(); Offset += Base & (psize - 1); Base &= ~(psize - 1); mlen = (Offset + Len + psize - 1) & ~(psize - 1); ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ, MAP_SHARED, devMemFd, (off_t)Base+BUS_BASE); if ((long)ptr == -1) { xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap[s=%x,a=%x,o=%x] failed (%s)\n", DEV_MEM, Len, Base, Offset, strerror(errno)); return(-1); } #ifdef DEBUG ErrorF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n", Base, ptr[0] | (ptr[1] << 8)); #endif (void)memcpy(Buf, (void *)(ptr + Offset), Len); (void)munmap((caddr_t)ptr, mlen); #ifdef DEBUG xf86MsgVerb(X_INFO, 3, "xf86ReadBIOS(%x, %x, Buf, %x)" "-> %02x %02x %02x %02x...\n", Base, Offset, Len, Buf[0], Buf[1], Buf[2], Buf[3]); #endif return(Len); } /* XXX This needs to be updated for the ND */ /* ** Find out whether the console driver provides memory mapping information ** for the specified region and return the map_info pointer. Print a warning if required. */ static struct memAccess * checkMapInfo(Bool warn, int Region) { struct memAccess *memAccP; switch (Region) { case VGA_REGION: memAccP = &vgaMemInfo; break; case LINEAR_REGION: memAccP = &linearMemInfo; break; case MMIO_REGION: memAccP = &ioMemInfo; break; default: return NULL; break; } if(!memAccP->Checked) { if(ioctl(xf86Info.screenFd, memAccP->ioctl, &(memAccP->memInfo)) == -1) { if(warn) { xf86Msg(X_WARNING, "checkMapInfo: failed to get map info for region %d\n\t(%s)\n", Region, strerror(errno)); } } else { if(memAccP->memInfo.u.map_info_mmap.map_offset != MAP_INFO_UNKNOWN) memAccP->OK = TRUE; } memAccP->Checked = TRUE; } if (memAccP->OK) { return memAccP; } else { return NULL; } } static pointer xf86MapInfoMap(struct memAccess *memInfoP, pointer Base, unsigned long Size) { struct map_info *mapInfoP = &(memInfoP->memInfo); if (mapInfoP->u.map_info_mmap.map_size == MAP_INFO_UNKNOWN) { Size = (unsigned long)Base + Size; } else { Size = mapInfoP->u.map_info_mmap.map_size; } switch(mapInfoP->method) { case MAP_MMAP: /* Need to remap if size is unknown because we may not have mapped the whole region initially */ if(memInfoP->regionVirtBase == NULL || mapInfoP->u.map_info_mmap.map_size == MAP_INFO_UNKNOWN) { if((memInfoP->regionVirtBase = mmap((caddr_t)0, Size, PROT_READ | PROT_WRITE, MAP_SHARED, xf86Info.screenFd, (unsigned long)mapInfoP->u.map_info_mmap.map_offset)) == (pointer)-1) { FatalError("xf86MapInfoMap: Failed to map memory at 0x%x\n\t%s\n", mapInfoP->u.map_info_mmap.map_offset, strerror(errno)); } if(mapInfoP->u.map_info_mmap.internal_offset > 0) memInfoP->regionVirtBase += mapInfoP->u.map_info_mmap.internal_offset; } break; default: FatalError("xf86MapInfoMap: Unsuported mapping method\n"); break; } return (pointer)((int)memInfoP->regionVirtBase + (int)Base); } static void xf86MapInfoUnmap(struct memAccess *memInfoP, unsigned long Size) { struct map_info *mapInfoP = &(memInfoP->memInfo); switch(mapInfoP->method) { case MAP_MMAP: if(memInfoP->regionVirtBase != NULL) { if(mapInfoP->u.map_info_mmap.map_size != MAP_INFO_UNKNOWN) Size = mapInfoP->u.map_info_mmap.map_size; munmap((caddr_t)memInfoP->regionVirtBase, Size); memInfoP->regionVirtBase = NULL; } break; default: FatalError("xf86MapInfoMap: Unsuported mapping method\n"); break; } } static pointer armMapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags) { struct memAccess *memInfoP; if((memInfoP = checkMapInfo(FALSE, Region)) != NULL) { /* ** xf86 passes in a physical address offset from the start ** of physical memory, but xf86MapInfoMap expects an ** offset from the start of the specified region - it gets ** the physical address of the region from the display driver. */ switch(Region) { case LINEAR_REGION: if (vgaPhysLinearBase) { Base -= vgaPhysLinearBase; } break; case VGA_REGION: Base -= 0xA0000; break; } base = xf86MapInfoMap(memInfoP, Base, Size); return (base); } return mapVidMem(ScreenNum, Base, Size, flags); } static void armUnmapVidMem(int ScreenNum, pointer Base, unsigned long Size) { struct memAccess *memInfoP; if((memInfoP = checkMapInfo(FALSE, Region)) != NULL) { xf86MapInfoUnmap(memInfoP, Base, Size); } unmapVidMem(ScreenNum, Base, Size); } #ifdef USE_DEV_IO static int IoFd = -1; void xf86EnableIO() { if (IoFd >= 0) return; if ((IoFd = open("/dev/io", O_RDWR)) == -1) { FatalError("xf86EnableIO: " "Failed to open /dev/io for extended I/O\n"); } return; } void xf86DisableIO() { if (IoFd < 0) return; close(IoFd); IoFd = -1; return; } #endif #if defined(USE_ARC_MMAP) || defined(__arm32__) void xf86EnableIO() { int fd; pointer base; if (ExtendedEnabled) return; if ((fd = open("/dev/ttyC0", O_RDWR)) >= 0) { /* Try to map a page at the pccons I/O space */ base = (pointer)mmap((caddr_t)0, 65536, PROT_READ | PROT_WRITE, MAP_FLAGS, fd, (off_t)0x0000); if (base != (pointer)-1) { IOPortBase = base; } else { FatalError("EnableIO: failed to mmap %s (%s)\n", "/dev/ttyC0", strerror(errno)); } } else { FatalError("EnableIO: failed to open %s (%s)\n", "/dev/ttyC0", strerror(errno)); } ExtendedEnabled = TRUE; return; } void xf86DisableIO() { return; } #endif /* USE_ARC_MMAP */ /***************************************************************************/ /* Interrupt Handling section */ /***************************************************************************/ Bool xf86DisableInterrupts() { return(TRUE); } void xf86EnableInterrupts() { return; } #if 0 /* * XXX This is here for reference. It needs to be handled differently for the * ND. */ #if defined(USE_ARC_MMAP) || defined(__arm32__) #ifdef USE_ARM32_MMAP #define DEV_MEM_IOBASE 0x43000000 #endif static Bool ScreenEnabled[MAXSCREENS]; static Bool ExtendedEnabled = FALSE; static Bool InitDone = FALSE; void xf86EnableIOPorts(ScreenNum) int ScreenNum; { int i; int fd; pointer base; #ifdef __arm32__ struct memAccess *memInfoP; int *Size; #endif ScreenEnabled[ScreenNum] = TRUE; if (ExtendedEnabled) return; #ifdef USE_ARC_MMAP if ((fd = open("/dev/ttyC0", O_RDWR)) >= 0) { /* Try to map a page at the pccons I/O space */ base = (pointer)mmap((caddr_t)0, 65536, PROT_READ | PROT_WRITE, MAP_FLAGS, fd, (off_t)0x0000); if (base != (pointer)-1) { IOPortBase = base; } else { xf86Msg(X_ERROR, "EnableIOPorts: failed to mmap %s (%s)\n", "/dev/ttyC0", strerror(errno)); } } else { xf86Msg(X_ERROR, "EnableIOPorts: failed to open %s (%s)\n", "/dev/ttyC0", strerror(errno)); } #endif #ifdef __arm32__ IOPortBase = (unsigned int)-1; if((memInfoP = checkMapInfo(TRUE, MMIO_REGION)) != NULL) { /* * xf86MapInfoMap maps an offset from the start of video IO * space (e.g. 0x3B0), but IOPortBase is expected to map to * physical address 0x000, so subtract the start of video I/O * space from the result. This is safe for now becase we * actually mmap the start of the page, then the start of video * I/O space is added as an internal offset. */ IOPortBase = (unsigned int)xf86MapInfoMap(memInfoP, (caddr_t)0x0, 0L) - memInfoP->memInfo.u.map_info_mmap.internal_offset; ExtendedEnabled = TRUE; return; } #ifdef USE_ARM32_MMAP checkDevMem(TRUE); if (devMemFd >= 0 && useDevMem) { base = (pointer)mmap((caddr_t)0, 0x400, PROT_READ | PROT_WRITE, MAP_FLAGS, devMemFd, (off_t)DEV_MEM_IOBASE); if (base != (pointer)-1) IOPortBase = (unsigned int)base; } if (IOPortBase == (unsigned int)-1) { FatalError("xf86EnableIOPorts: failed to open mem device or map IO base. \n\ Make sure you have the Aperture Driver installed, or a kernel built with the INSECURE option\n"); } #else /* We don't have the IOBASE, so we can't map the address */ FatalError("xf86EnableIOPorts: failed to open mem device or map IO base. \n\ Try building the server with USE_ARM32_MMAP defined\n"); #endif #endif ExtendedEnabled = TRUE; return; } void xf86DisableIOPorts(ScreenNum) int ScreenNum; { int i; #ifdef __arm32__ struct memAccess *memInfoP; #endif ScreenEnabled[ScreenNum] = FALSE; #ifdef __arm32__ if((memInfoP = checkMapInfo(FALSE, MMIO_REGION)) != NULL) { xf86MapInfoUnmap(memInfoP, 0); } #endif #ifdef USE_ARM32_MMAP if (!ExtendedEnabled) return; for (i = 0; i < MAXSCREENS; i++) if (ScreenEnabled[i]) return; munmap((caddr_t)IOPortBase, 0x400); IOPortBase = (unsigned int)-1; ExtendedEnabled = FALSE; #endif return; } #endif /* USE_ARC_MMAP || USE_ARM32_MMAP */ #endif