MicroBlaze Port

Signed-off-by: David Holsgrove <david.holsgrove@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

5 files changed, 251 insertions, 0 deletions

diff --git a/ports/sysdeps/microblaze/nptl/Makefile b/ports/sysdeps/microblaze/nptl/Makefile
new file mode 100644
index 0000000..3c0521a
--- /dev/null
+++ b/ports/sysdeps/microblaze/nptl/Makefile
@@ -0,0 +1,21 @@
+# Copyright (C) 2005-2013 Free Software Foundation, Inc.
+#
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+ifeq ($(subdir),csu)
+gen-as-const-headers += tcb-offsets.sym
+endif
diff --git a/ports/sysdeps/microblaze/nptl/pthread_spin_lock.c b/ports/sysdeps/microblaze/nptl/pthread_spin_lock.c
new file mode 100644
index 0000000..0d12517
--- /dev/null
+++ b/ports/sysdeps/microblaze/nptl/pthread_spin_lock.c
@@ -0,0 +1,24 @@
+/* Copyright (C) 2008-2013 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define SPIN_LOCK_READS_BETWEEN_CMPXCHG 1000
+
+/* We can't use the normal "#include <nptl/pthread_spin_lock.c>" because
+   it will resolve to this very file.  Using "sysdeps/.." as reference to the
+   top level directory does the job.  */
+#include <sysdeps/../nptl/pthread_spin_lock.c>
diff --git a/ports/sysdeps/microblaze/nptl/pthreaddef.h b/ports/sysdeps/microblaze/nptl/pthreaddef.h
new file mode 100644
index 0000000..29d5828
--- /dev/null
+++ b/ports/sysdeps/microblaze/nptl/pthreaddef.h
@@ -0,0 +1,40 @@
+/* Copyright (C) 2002-2013 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdlib.h>
+#include <string.h>
+
+/* Default stack size.  */
+#define ARCH_STACK_DEFAULT_SIZE  (2 * 1024 * 1024)
+
+/* Required stack pointer alignment at beginning.  */
+#define STACK_ALIGN         16
+
+/* Minimal stack size after allocating thread descriptor and guard size.  */
+#define MINIMAL_REST_STACK  2048
+
+/* Alignment requirement for TCB.  */
+#define TCB_ALIGNMENT       16
+
+/* Location of current stack frame.  */
+#define CURRENT_STACK_FRAME __builtin_frame_address (0)
+
+/* XXX Until we have a better place keep the definitions here.  */
+
+#define __exit_thread_inline(val) \
+  INLINE_SYSCALL (exit, 1, (val))
diff --git a/ports/sysdeps/microblaze/nptl/tcb-offsets.sym b/ports/sysdeps/microblaze/nptl/tcb-offsets.sym
new file mode 100644
index 0000000..18afbee
--- /dev/null
+++ b/ports/sysdeps/microblaze/nptl/tcb-offsets.sym
@@ -0,0 +1,11 @@
+#include <sysdep.h>
+#include <tls.h>
+
+--
+
+-- Abuse tls.h macros to derive offsets relative to the thread register.
+#define thread_offsetof(mem)	(long)(offsetof (struct pthread, mem) - sizeof (struct pthread))
+
+MULTIPLE_THREADS_OFFSET	thread_offsetof (header.multiple_threads)
+PID_OFFSET			thread_offsetof (pid)
+TID_OFFSET			thread_offsetof (tid)
diff --git a/ports/sysdeps/microblaze/nptl/tls.h b/ports/sysdeps/microblaze/nptl/tls.h
new file mode 100644
index 0000000..9598982
--- /dev/null
+++ b/ports/sysdeps/microblaze/nptl/tls.h
@@ -0,0 +1,155 @@
+/* Copyright (C) 2005-2013 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _TLS_H
+# define _TLS_H 1
+
+# include <dl-sysdep.h>
+
+#ifndef __ASSEMBLER__
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+
+/* Type for the dtv.  */
+typedef union dtv
+{
+  size_t counter;
+  struct
+  {
+    void *val;
+    bool is_static;
+  } pointer;
+} dtv_t;
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+#ifndef __ASSEMBLER__
+
+/* Get system call information.  */
+# include <sysdep.h>
+
+/* The TP points to the start of the thread blocks.  */
+# define TLS_DTV_AT_TP  1
+
+/* Get the thread descriptor definition.  */
+# include <nptl/descr.h>
+
+typedef struct
+{
+  dtv_t *dtv;
+  void *private;
+} tcbhead_t;
+
+static inline void *__microblaze_get_thread_area (void)
+{
+  register void * volatile __microblaze_thread_area asm ("r21");
+  return (void *) __microblaze_thread_area;
+}
+
+# define READ_THREAD_POINTER() \
+  ({ __microblaze_get_thread_area(); })
+
+/* This is the size of the initial TCB.  */
+# define TLS_INIT_TCB_SIZE  sizeof (tcbhead_t)
+
+/* Alignment requirements for the initial TCB.  */
+# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
+
+/* This is the size of the TCB.  */
+# define TLS_TCB_SIZE       sizeof (tcbhead_t)
+
+/* This is the size we need before TCB.  */
+# define TLS_PRE_TCB_SIZE   sizeof (struct pthread)
+
+/* Alignment requirements for the TCB.  */
+# define TLS_TCB_ALIGN      __alignof__ (struct pthread)
+
+/* Install the dtv pointer.  The pointer passed is to the element with
+   index -1 which contain the length.  */
+# define INSTALL_DTV(tcbp, dtvp) \
+  (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
+
+/* Install new dtv for current thread.  */
+# define INSTALL_NEW_DTV(dtv) \
+  (THREAD_DTV() = (dtv))
+
+/* Return dtv of given thread descriptor.  */
+# define GET_DTV(tcbp) \
+  (((tcbhead_t *) (tcbp))->dtv)
+
+/* Code to initially initialize the thread pointer.
+   r21 is reserved for thread pointer.  */
+# define TLS_INIT_TP(tcbp, secondcall) \
+  ({ __asm __volatile ("or r21,r0,%0" : : "r" ((void *)tcbp)); 0; })
+
+/* Return the address of the dtv for the current thread.  */
+# define THREAD_DTV() \
+  (((tcbhead_t *) READ_THREAD_POINTER())->dtv)
+
+/* Return the thread descriptor for the current thread.  */
+# define THREAD_SELF \
+  (((struct pthread *) READ_THREAD_POINTER()) - 1)
+
+/* Magic for libthread_db to know how to do THREAD_SELF.  */
+# define DB_THREAD_SELF \
+  CONST_THREAD_AREA (32, sizeof (struct pthread))
+
+/* Read member of the thread descriptor directly.  */
+# define THREAD_GETMEM(descr, member) (descr->member)
+
+/* Same as THREAD_GETMEM, but the member offset can be non-constant.  */
+# define THREAD_GETMEM_NC(descr, member, idx) \
+  (descr->member[idx])
+
+/* Set member of the thread descriptor directly.  */
+# define THREAD_SETMEM(descr, member, value) \
+  (descr->member = (value))
+
+/* Same as THREAD_SETMEM, but the member offset can be non-constant.  */
+# define THREAD_SETMEM_NC(descr, member, idx, value) \
+  (descr->member[idx] = (value))
+
+/* Get and set the global scope generation counter in struct pthread.  */
+# define THREAD_GSCOPE_FLAG_UNUSED 0
+# define THREAD_GSCOPE_FLAG_USED   1
+# define THREAD_GSCOPE_FLAG_WAIT   2
+# define THREAD_GSCOPE_RESET_FLAG()                                         \
+  do                                                                        \
+    { int __res                                                             \
+      = atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,              \
+                             THREAD_GSCOPE_FLAG_UNUSED);                    \
+      if (__res == THREAD_GSCOPE_FLAG_WAIT)                                 \
+        lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE);  \
+    }                                                                       \
+  while (0)
+# define THREAD_GSCOPE_SET_FLAG()                                           \
+  do                                                                        \
+    {                                                                       \
+      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;            \
+      atomic_write_barrier ();                                              \
+    }                                                                       \
+  while (0)
+# define THREAD_GSCOPE_WAIT() \
+  GL (dl_wait_lookup_done) ()
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* tls.h.  */