From 06dcaf09e6c0eae0b3a3c8d84adb663d03a53a4b Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 16 Mar 2011 20:05:06 +0000 Subject: 2011-03-16 Jennifer Averett PR 1729/cpukit * configure.ac, sapi/include/confdefs.h, sapi/src/exinit.c, score/Makefile.am, score/preinstall.am, score/cpu/i386/rtems/score/cpu.h, score/cpu/sparc/cpu_asm.S, score/cpu/sparc/rtems/score/cpu.h, score/include/rtems/score/basedefs.h, score/include/rtems/score/context.h, score/include/rtems/score/percpu.h, score/src/percpu.c, score/src/thread.c, score/src/threadcreateidle.c: Add next step in SMP support. This adds an allocated array of the Per_CPU structures to support multiple cpus vs a single instance of the structure which is still used if SMP support is disabled. Configuration support is also added to explicitly enable or disable SMP. But SMP can only be enabled for the CPUs which will support it initially -- SPARC and i386. With the stub BSP support, a BSP can be run as a single core SMP system from an RTEMS data structure standpoint. * aclocal/check-smp.m4, aclocal/enable-smp.m4, score/include/rtems/bspsmp.h, score/include/rtems/score/smplock.h, score/src/smp.c, score/src/smplock.c: New files. --- cpukit/aclocal/check-smp.m4 | 19 +++++++++++++++++++ cpukit/aclocal/enable-smp.m4 | 18 ++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 cpukit/aclocal/check-smp.m4 create mode 100644 cpukit/aclocal/enable-smp.m4 (limited to 'cpukit/aclocal') diff --git a/cpukit/aclocal/check-smp.m4 b/cpukit/aclocal/check-smp.m4 new file mode 100644 index 0000000000..294f5c9d2c --- /dev/null +++ b/cpukit/aclocal/check-smp.m4 @@ -0,0 +1,19 @@ +dnl $Id$ +dnl +AC_DEFUN([RTEMS_CHECK_SMP], +[dnl +AC_REQUIRE([RTEMS_ENABLE_SMP])dnl + +AC_CACHE_CHECK([whether CPU supports libposix], + rtems_cv_HAS_SMP, + [dnl + case "$RTEMS_CPU" in + *) + if test "${RTEMS_HAS_SMP}" = "yes"; then + rtems_cv_HAS_SMP="yes"; + else + rtems_cv_HAS_SMP="disabled"; + fi + ;; + esac]) +]) diff --git a/cpukit/aclocal/enable-smp.m4 b/cpukit/aclocal/enable-smp.m4 new file mode 100644 index 0000000000..84561f8bbd --- /dev/null +++ b/cpukit/aclocal/enable-smp.m4 @@ -0,0 +1,18 @@ +dnl $Id$ + +AC_DEFUN([RTEMS_ENABLE_SMP], +[ +## AC_BEFORE([$0], [RTEMS_CHECK_SMP])dnl + +AC_ARG_ENABLE(smp, +[AS_HELP_STRING([--enable-smp],[enable smp interface])], +[case "${enableval}" in + yes) case "${RTEMS_CPU}" in + sparc|i386) RTEMS_HAS_SMP=yes ;; + *) RTEMS_HAS_SMP=no ;; + esac + ;; + no) RTEMS_HAS_SMP=no ;; + *) AC_MSG_ERROR(bad value ${enableval} for enable-smp option) ;; +esac],[RTEMS_HAS_SMP=no]) +]) -- cgit v1.2.3