bsp/x86_64: Minimal bootable BSP

Current state:

  - Basic context initialization and switching code.
  - Stubbed console (empty functions).
  - Mostly functional linker script (may need tweaks if we ever want to move
    away from the large code model (see: CPU_CFLAGS).
  - Fully functional boot, by using FreeBSD's bootloader to load RTEMS's ELF for
    UEFI-awareness.

In short, the current state with this commit lets us boot, go through the system
initialization functions, and then call user application's Init task too.

Updates #2898.

5 files changed, 96 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/x86_64/Makefile.am b/c/src/lib/libbsp/x86_64/Makefile.am
new file mode 100644
index 0000000000..c25b2d3f99
--- /dev/null
+++ b/c/src/lib/libbsp/x86_64/Makefile.am
@@ -0,0 +1,7 @@
+ACLOCAL_AMFLAGS = -I ../../../aclocal
+
+# Descend into the @RTEMS_BSP_FAMILY@ directory
+_SUBDIRS = @RTEMS_BSP_FAMILY@
+
+include $(top_srcdir)/../../../automake/subdirs.am
+include $(top_srcdir)/../../../automake/local.am
diff --git a/c/src/lib/libbsp/x86_64/acinclude.m4 b/c/src/lib/libbsp/x86_64/acinclude.m4
new file mode 100644
index 0000000000..92ae6f719e
--- /dev/null
+++ b/c/src/lib/libbsp/x86_64/acinclude.m4
@@ -0,0 +1,10 @@
+# RTEMS_CHECK_BSPDIR(RTEMS_BSP_FAMILY)
+AC_DEFUN([RTEMS_CHECK_BSPDIR],
+[
+  case "$1" in
+  amd64 )
+    AC_CONFIG_SUBDIRS([amd64]);;
+  *)
+    AC_MSG_ERROR([Invalid BSP]);;
+  esac
+])
diff --git a/c/src/lib/libbsp/x86_64/amd64/Makefile.am b/c/src/lib/libbsp/x86_64/amd64/Makefile.am
new file mode 100644
index 0000000000..f05b40f3f9
--- /dev/null
+++ b/c/src/lib/libbsp/x86_64/amd64/Makefile.am
@@ -0,0 +1,40 @@
+ACLOCAL_AMFLAGS = -I ../../../../aclocal
+
+include $(top_srcdir)/../../../../automake/compile.am
+include $(top_srcdir)/../../bsp.am
+
+dist_project_lib_DATA = ../../../../../../bsps/x86_64/amd64/start/bsp_specs
+
+noinst_PROGRAMS =
+
+project_lib_DATA = linkcmds
+
+project_lib_LIBRARIES = librtemsbsp.a
+librtemsbsp_a_SOURCES =
+
+# startup
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspfatal-default.c
+#  XXX: We may want a custom bsp_work_area_initialize to detect memory size like
+#  the i386
+#
+# FreeBSD's bootloader may leave a bootinfo structure for the kernel to find later:
+# http://fxr.watson.org/fxr/source/i386/include/bootinfo.h?v=FREEBSD11#L48
+#
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspgetworkarea-default.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/x86_64/amd64/start/bspstart.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/x86_64/amd64/start/start.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/sbrk.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/dev/getentropy/getentropy-cpucounter.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/start/bspreset-empty.c
+# clock
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/dev/clock/clock-simidle.c
+# console
+librtemsbsp_a_SOURCES += ../../../../../../bsps/x86_64/amd64/console/console.c
+# timer
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/dev/btimer/btimer-stub.c
+# cache
+librtemsbsp_a_SOURCES += ../../../../../../bsps/shared/cache/nocache.c
+
+include $(top_srcdir)/../../../../automake/local.am
+include $(srcdir)/../../../../../../bsps/shared/shared-sources.am
+include $(srcdir)/../../../../../../bsps/x86_64/amd64/headers.am
diff --git a/c/src/lib/libbsp/x86_64/amd64/configure.ac b/c/src/lib/libbsp/x86_64/amd64/configure.ac
new file mode 100644
index 0000000000..2f565fc4d9
--- /dev/null
+++ b/c/src/lib/libbsp/x86_64/amd64/configure.ac
@@ -0,0 +1,19 @@
+## Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([rtems-c-src-lib-libbsp-x86_64-amd64],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
+RTEMS_TOP(../../../../../..)
+RTEMS_SOURCE_TOP
+RTEMS_BUILD_TOP
+RTEMS_BSP_LINKCMDS
+
+RTEMS_CANONICAL_TARGET_CPU
+AM_INIT_AUTOMAKE([no-define nostdinc foreign 1.12.2])
+RTEMS_BSP_CONFIGURE
+
+
+RTEMS_BSP_CLEANUP_OPTIONS
+
+# Explicitly list all Makefiles here
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/c/src/lib/libbsp/x86_64/configure.ac b/c/src/lib/libbsp/x86_64/configure.ac
new file mode 100644
index 0000000000..a398a4e202
--- /dev/null
+++ b/c/src/lib/libbsp/x86_64/configure.ac
@@ -0,0 +1,20 @@
+## Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([rtems-c-src-lib-libbsp-x86_64],[_RTEMS_VERSION],[https://devel.rtems.org/newticket])
+RTEMS_TOP(../../../../..)
+RTEMS_SOURCE_TOP
+RTEMS_BUILD_TOP
+
+RTEMS_CANONICAL_TARGET_CPU
+AM_INIT_AUTOMAKE([no-define foreign subdir-objects 1.12.2])
+AM_MAINTAINER_MODE
+
+RTEMS_ENV_RTEMSBSP
+RTEMS_PROJECT_ROOT
+
+RTEMS_CHECK_BSPDIR([$RTEMS_BSP_FAMILY])
+
+# Explicitly list all Makefiles here
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT