/* * 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 name of David Wexelblat not be used in * advertising or publicity pertaining to distribution of the software without * specific, written prior permission. David Wexelblat makes no representations * about the suitability of this software for any purpose. It is provided * "as is" without express or implied warranty. * * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL 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. * */ #ifdef HAVE_XORG_CONFIG_H #include #endif #include #include "xf86.h" #include "xf86Priv.h" #include "xf86_OSlib.h" #ifndef MAP_FAILED #define MAP_FAILED ((void *)-1) #endif /* * Read BIOS via mmap()ing DEV_MEM */ #ifndef __alpha__ int xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, int Len) { int fd; unsigned char *ptr; int psize; int mlen; if ((fd = open(DEV_MEM, O_RDONLY)) < 0) { xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n", DEV_MEM, strerror(errno)); return -1; } psize = getpagesize(); 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, fd, (off_t)Base); if (ptr == MAP_FAILED) { xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed (%s)\n", DEV_MEM, strerror(errno)); close(fd); return -1; } DebugF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n", Base, ptr[0] | (ptr[1] << 8)); (void)memcpy(Buf, (void *)(ptr + Offset), Len); (void)munmap((caddr_t)ptr, mlen); (void)close(fd); return Len; } #else /* __alpha__ */ /* * We trick "mmap" into mapping BUS memory for us via BUS_BASE, * which is the KSEG address of the start of the DENSE memory * area. */ /* * NOTE: there prolly ought to be more validity checks and all * re: boundaries and sizes and such... */ #ifdef linux extern unsigned long _bus_base(void); #define BUS_BASE _bus_base() #else extern u_int64_t dense_base(void); #define BUS_BASE dense_base() #endif int xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, int Len) { caddr_t base; int fd; int psize; int mlen; if ((fd = open(DEV_MEM, O_RDONLY)) < 0) { xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n", DEV_MEM, strerror(errno)); return -1; } psize = getpagesize(); Offset += Base & (psize - 1); Base &= ~(psize - 1); mlen = (Offset + Len + psize - 1) & ~(psize - 1); base = mmap((caddr_t)0, mlen, PROT_READ, MAP_SHARED, fd, (off_t)(Base + BUS_BASE)); if (base == MAP_FAILED) { xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to mmap %s (%s)\n", DEV_MEM, strerror(errno)); return -1; } xf86SlowBCopyFromBus((unsigned char *)(base+Offset), Buf, Len); munmap((caddr_t)base, mlen); close(fd); return Len; } #endif /* __alpha__ */