diff options
| -rw-r--r-- | com32/include/syslinux/features.h | 50 | ||||
| -rw-r--r-- | com32/lib/Makefile | 2 | ||||
| -rw-r--r-- | com32/lib/syslinux/features.c | 51 |
3 files changed, 102 insertions, 1 deletions
diff --git a/com32/include/syslinux/features.h b/com32/include/syslinux/features.h new file mode 100644 index 00000000..e3da12e2 --- /dev/null +++ b/com32/include/syslinux/features.h @@ -0,0 +1,50 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2007 H. Peter Anvin - 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 THE AUTHORS OR COPYRIGHT + * HOLDERS 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. + * + * ----------------------------------------------------------------------- */ + +#ifndef _SYSLINUX_FEATURES_H +#define _SYSLINUX_FEATURES_H + +#define SYSLINUX_FEATURE_LOCAL_BOOT (0*8+0) +#define SYSLINUX_FEATURE_NOOP_IDLE (0*8+1) + +extern struct __syslinux_feature_flags { + unsigned int len; + const unsigned char *ptr; +} __syslinux_feature_flags; + +static inline int syslinux_has_feature(unsigned int __flag) +{ + unsigned int __byte = __flag >> 3; + unsigned int __bit = __flag & 7; + + if (__byte <= __syslinux_feature_flags.len) + return (__syslinux_feature_flags.ptr[__byte] >> __bit) & 1; + else + return 0; +} + +#endif /* _SYSLINUX_FEATURE_H */ diff --git a/com32/lib/Makefile b/com32/lib/Makefile index 46c30467..f0384523 100644 --- a/com32/lib/Makefile +++ b/com32/lib/Makefile @@ -64,7 +64,7 @@ LIBOBJS = \ \ sys/x86_init_fpu.o math/pow.o math/strtod.o \ \ - syslinux/idle.o \ + syslinux/idle.o syslinux/features.o \ \ syslinux/addlist.o syslinux/freelist.o syslinux/memmap.o \ syslinux/movebits.o syslinux/shuffle.o syslinux/shuffle_pm.o \ diff --git a/com32/lib/syslinux/features.c b/com32/lib/syslinux/features.c new file mode 100644 index 00000000..2b61eb4c --- /dev/null +++ b/com32/lib/syslinux/features.c @@ -0,0 +1,51 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2007 H. Peter Anvin - 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 THE AUTHORS OR COPYRIGHT + * HOLDERS 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. + * + * ----------------------------------------------------------------------- */ + +/* + * syslinux/features.c + * + * SYSLINUX feature flag query + */ + +#include <klibc/compiler.h> +#include <syslinux/features.h> +#include <string.h> +#include <com32.h> + +struct __syslinux_feature_flags __syslinux_feature_flags; + +void __constructor __syslinux_detect_features(void) +{ + static com32sys_t reg; + + memset(®, 0, sizeof reg); + reg.eax.w[0] = 0x0015; + __intcall(0x22, ®, ®); + + __syslinux_feature_flags.len = reg.ecx.w[0]; + __syslinux_feature_flags.ptr = MK_PTR(reg.es, reg.ebx.w[0]); +} |