diff options
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/shared/bios_mmap.c')
| -rw-r--r-- | xorg-server/hw/xfree86/os-support/shared/bios_mmap.c | 128 |
1 files changed, 63 insertions, 65 deletions
diff --git a/xorg-server/hw/xfree86/os-support/shared/bios_mmap.c b/xorg-server/hw/xfree86/os-support/shared/bios_mmap.c index b7b35d9db..e000dc9c8 100644 --- a/xorg-server/hw/xfree86/os-support/shared/bios_mmap.c +++ b/xorg-server/hw/xfree86/os-support/shared/bios_mmap.c @@ -38,41 +38,39 @@ #ifndef __alpha__ int xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, - int Len) + 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; + 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__ */ +#else /* __alpha__ */ /* * We trick "mmap" into mapping BUS memory for us via BUS_BASE, @@ -88,50 +86,50 @@ xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, #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) + 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; + 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__ */ +#endif /* __alpha__ */ |