diff options
| -rw-r--r-- | config.h.in | 3 | ||||
| -rwxr-xr-x | configure | 145 | ||||
| -rw-r--r-- | configure.in | 1 | ||||
| -rw-r--r-- | udelay.c | 118 |
4 files changed, 12 insertions, 255 deletions
diff --git a/config.h.in b/config.h.in index ed264ef..76abc47 100644 --- a/config.h.in +++ b/config.h.in @@ -12,9 +12,6 @@ /* Define to 1 if you have the <asm/io.h> header file. */ #undef HAVE_ASM_IO_H -/* Define to 1 if you have the <asm/msr.h> header file. */ -#undef HAVE_ASM_MSR_H - /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'. */ #undef HAVE_DIRENT_H @@ -10993,151 +10993,6 @@ fi done -for ac_header in asm/msr.h -do -as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` -if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then - { echo "$as_me:$LINENO: checking for $ac_header" >&5 -echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } -if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then - echo $ECHO_N "(cached) $ECHO_C" >&6 -fi -ac_res=`eval echo '${'$as_ac_Header'}'` - { echo "$as_me:$LINENO: result: $ac_res" >&5 -echo "${ECHO_T}$ac_res" >&6; } -else - # Is the header compilable? -{ echo "$as_me:$LINENO: checking $ac_header usability" >&5 -echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6; } -cat >conftest.$ac_ext <<_ACEOF -/* confdefs.h. */ -_ACEOF -cat confdefs.h >>conftest.$ac_ext -cat >>conftest.$ac_ext <<_ACEOF -/* end confdefs.h. */ -$ac_includes_default -#include <$ac_header> -_ACEOF -rm -f conftest.$ac_objext -if { (ac_try="$ac_compile" -case "(($ac_try" in - *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; - *) ac_try_echo=$ac_try;; -esac -eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 - (eval "$ac_compile") 2>conftest.er1 - ac_status=$? - grep -v '^ *+' conftest.er1 >conftest.err - rm -f conftest.er1 - cat conftest.err >&5 - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); } && { - test -z "$ac_c_werror_flag" || - test ! -s conftest.err - } && test -s conftest.$ac_objext; then - ac_header_compiler=yes -else - echo "$as_me: failed program was:" >&5 -sed 's/^/| /' conftest.$ac_ext >&5 - - ac_header_compiler=no -fi - -rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext -{ echo "$as_me:$LINENO: result: $ac_header_compiler" >&5 -echo "${ECHO_T}$ac_header_compiler" >&6; } - -# Is the header present? -{ echo "$as_me:$LINENO: checking $ac_header presence" >&5 -echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6; } -cat >conftest.$ac_ext <<_ACEOF -/* confdefs.h. */ -_ACEOF -cat confdefs.h >>conftest.$ac_ext -cat >>conftest.$ac_ext <<_ACEOF -/* end confdefs.h. */ -#include <$ac_header> -_ACEOF -if { (ac_try="$ac_cpp conftest.$ac_ext" -case "(($ac_try" in - *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;; - *) ac_try_echo=$ac_try;; -esac -eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5 - (eval "$ac_cpp conftest.$ac_ext") 2>conftest.er1 - ac_status=$? - grep -v '^ *+' conftest.er1 >conftest.err - rm -f conftest.er1 - cat conftest.err >&5 - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); } >/dev/null && { - test -z "$ac_c_preproc_warn_flag$ac_c_werror_flag" || - test ! -s conftest.err - }; then - ac_header_preproc=yes -else - echo "$as_me: failed program was:" >&5 -sed 's/^/| /' conftest.$ac_ext >&5 - - ac_header_preproc=no -fi - -rm -f conftest.err conftest.$ac_ext -{ echo "$as_me:$LINENO: result: $ac_header_preproc" >&5 -echo "${ECHO_T}$ac_header_preproc" >&6; } - -# So? What about this header? -case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in - yes:no: ) - { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5 -echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5 -echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;} - ac_header_preproc=yes - ;; - no:yes:* ) - { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5 -echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5 -echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5 -echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5 -echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5 -echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;} - { echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5 -echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;} - ( cat <<\_ASBOX -## ---------------------------------------------------- ## -## Report this to lcd4linux-users@lists.sourceforge.net ## -## ---------------------------------------------------- ## -_ASBOX - ) | sed "s/^/$as_me: WARNING: /" >&2 - ;; -esac -{ echo "$as_me:$LINENO: checking for $ac_header" >&5 -echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6; } -if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then - echo $ECHO_N "(cached) $ECHO_C" >&6 -else - eval "$as_ac_Header=\$ac_header_preproc" -fi -ac_res=`eval echo '${'$as_ac_Header'}'` - { echo "$as_me:$LINENO: result: $ac_res" >&5 -echo "${ECHO_T}$ac_res" >&6; } - -fi -if test `eval echo '${'$as_ac_Header'}'` = yes; then - cat >>confdefs.h <<_ACEOF -#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 -_ACEOF - -fi - -done - - # Checks for typedefs, structures, and compiler characteristics. { echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5 echo $ECHO_N "checking for an ANSI C-conforming const... $ECHO_C" >&6; } diff --git a/configure.in b/configure.in index ab86cf3..4e35860 100644 --- a/configure.in +++ b/configure.in @@ -99,7 +99,6 @@ AC_HEADER_STDC AC_CHECK_HEADERS([arpa/inet.h fcntl.h netdb.h netinet/in.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h sys/vfs.h syslog.h termios.h unistd.h]) AC_CHECK_HEADERS(sys/io.h asm/io.h) AC_CHECK_HEADERS(linux/parport.h linux/ppdev.h) -AC_CHECK_HEADERS(asm/msr.h) # Checks for typedefs, structures, and compiler characteristics. AC_C_CONST @@ -55,11 +55,6 @@ #include <string.h> #include <sys/time.h> -#ifdef HAVE_ASM_MSR_H -#define u32 unsigned int -#include <asm/msr.h> -#endif - #include "debug.h" #include "cfg.h" @@ -67,79 +62,10 @@ #include "udelay.h" -static unsigned int ticks_per_usec = 0; - - -static void getCPUinfo(int *hasTSC, double *MHz) -{ - int fd; - char buffer[4096], *p; - - *hasTSC = 0; - *MHz = -1; - - fd = open("/proc/cpuinfo", O_RDONLY); - if (fd == -1) { - error("udelay: open(/proc/cpuinfo) failed: %s", strerror(errno)); - return; - } - if (read(fd, &buffer, sizeof(buffer) - 1) == -1) { - error("udelay: read(/proc/cpuinfo) failed: %s", strerror(errno)); - close(fd); - return; - } - close(fd); - - p = strstr(buffer, "flags"); - if (p == NULL) { - info("udelay: /proc/cpuinfo has no 'flags' line"); - } else { - p = strstr(p, "tsc"); - if (p == NULL) { - info("udelay: CPU does not support Time Stamp Counter"); - } else { - info("udelay: CPU supports Time Stamp Counter"); - *hasTSC = 1; - } - } - - p = strstr(buffer, "cpu MHz"); - if (p == NULL) { - info("udelay: /proc/cpuinfo has no 'cpu MHz' line"); - } else { - if (sscanf(p + 7, " : %lf", MHz) != 1) { - error("udelay: parse(/proc/cpuinfo) failed: unknown 'cpu MHz' format"); - *MHz = -1; - } else { - info("udelay: CPU runs at %f MHz", *MHz); - } - } - -} - void udelay_init(void) { -#ifdef HAVE_ASM_MSR_H - - int tsc; - double mhz; - - getCPUinfo(&tsc, &mhz); - - if (tsc && mhz > 0.0) { - ticks_per_usec = ceil(mhz); - info("udelay: using TSC delay loop, %u ticks per microsecond", ticks_per_usec); - } else -#else - error("udelay: The file 'include/asm/msr.h' was missing at compile time."); - error("udelay: Even if your CPU supports TSC, it will not be used!"); - error("udelay: You *really* should install msr.h and recompile LCD4linux!"); -#endif - { - ticks_per_usec = 0; - info("udelay: using gettimeofday() delay loop"); - } + info("udelay: using gettimeofday() delay loop"); } @@ -172,37 +98,17 @@ unsigned long timing(const char *driver, const char *section, const char *name, void ndelay(const unsigned long nsec) { -#ifdef HAVE_ASM_MSR_H - - if (ticks_per_usec) { - - unsigned int t1, t2; - unsigned long tsc; + struct timeval now, end; - tsc = (nsec * ticks_per_usec + 999) / 1000; - - rdtscl(t1); - do { - rep_nop(); - rdtscl(t2); - } while ((t2 - t1) < tsc); - - } else -#endif - - { - struct timeval now, end; - - gettimeofday(&end, NULL); - end.tv_usec += (nsec + 999) / 1000; - while (end.tv_usec > 1000000) { - end.tv_usec -= 1000000; - end.tv_sec++; - } - - do { - rep_nop(); - gettimeofday(&now, NULL); - } while (now.tv_sec == end.tv_sec ? now.tv_usec < end.tv_usec : now.tv_sec < end.tv_sec); + gettimeofday(&end, NULL); + end.tv_usec += (nsec + 999) / 1000; + while (end.tv_usec > 1000000) { + end.tv_usec -= 1000000; + end.tv_sec++; } + + do { + rep_nop(); + gettimeofday(&now, NULL); + } while (now.tv_sec == end.tv_sec ? now.tv_usec < end.tv_usec : now.tv_sec < end.tv_sec); } |