Untangle the inter-dependency of kse types and ksd types/functions

by moving the definition of struct ksd to pthread_md.h and removing
the inclusion of ksd.h from thr_private.h (which has the definition
of struct kse and kse_critical_t). This allows ksd.h to have inline
functions that use struct kse and kse_critical_t and generally
yields a cleaner implementation at the cost of not having all ksd
related types/definitions in one header.

Implement the ksd functionality on ia64 by using inline functions
and permanently remove ksd.c from the ia64 specific makefile.

This change does not clean up the i386 specific version of ksd.h.

NOTE: The ksd code on ia64 abuses the tp register in the same way
as it is abused in libthr in that it is incompatible with the
runtime specification. This will be address when support for TLS
hits the tree.

lib/libkse/arch/i386/include/pthread_md.h

@@ -51,4 +51,16 @@ extern int _thr_getcontext(ucontext_t *);
 
 #define	THR_ALIGNBYTES	15
 #define	THR_ALIGN(td)	(((unsigned)(td) + THR_ALIGNBYTES) & ~THR_ALIGNBYTES)
+
+/*
+ * KSE Specific Data.
+ */
+struct ksd {
+	int	ldt;
+#define	KSDF_INITIALIZED	0x01
+	long	flags;
+	void	*base;
+	long	size;
+};
+
 #endif

lib/libkse/arch/ia64/Makefile.inc

@@ -2,4 +2,4 @@
 
 .PATH:	${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH}
 
-SRCS+=	ksd.c thr_enter_uts.S thr_switch.S
+SRCS+=	thr_enter_uts.S thr_switch.S

lib/libkse/arch/ia64/include/pthread_md.h

@@ -35,4 +35,10 @@
 #define	THR_ALIGNBYTES	15
 #define	THR_ALIGN(td)	(((uintptr_t)(td) + THR_ALIGNBYTES) & ~THR_ALIGNBYTES)
 
+/* KSE Specific Data. */
+struct ksd {
+	void	*ksd_base;
+	int	ksd_size;
+};
+
 #endif /* _PTHREAD_MD_H_ */

lib/libkse/thread/thr_kern.c

@@ -52,8 +52,8 @@ __FBSDID("$FreeBSD$");
 
 #include "atomic_ops.h"
 #include "thr_private.h"
-#include "pthread_md.h"
 #include "libc_private.h"
+#include "ksd.h"
 
 /*#define DEBUG_THREAD_KERN */
 #ifdef DEBUG_THREAD_KERN

lib/libkse/thread/thr_private.h

@@ -54,7 +54,6 @@
 #include <pthread.h>
 #include <pthread_np.h>
 
-#include "ksd.h"
 #include "lock.h"
 #include "pthread_md.h"
 

lib/libpthread/arch/i386/i386/ksd.c

@@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <ucontext.h>
 
+#include "pthread_md.h"
 #include "ksd.h"
 
 #define LDT_ENTRIES 8192

lib/libpthread/arch/i386/include/ksd.h

@@ -34,21 +34,8 @@
 
 #include <sys/types.h>
 
-struct pthread;
-struct __ucontext;
 struct kse;
 
-/*
- * KSE Specific Data.
- */
-struct ksd {
-	int	ldt;
-#define	KSDF_INITIALIZED	0x01
-	long	flags;
-	void	*base;
-	long	size;
-};
-
 /*
  * Evaluates to the byte offset of the per-kse variable name.
  */

lib/libpthread/arch/i386/include/pthread_md.h

@@ -51,4 +51,16 @@ extern int _thr_getcontext(ucontext_t *);
 
 #define	THR_ALIGNBYTES	15
 #define	THR_ALIGN(td)	(((unsigned)(td) + THR_ALIGNBYTES) & ~THR_ALIGNBYTES)
+
+/*
+ * KSE Specific Data.
+ */
+struct ksd {
+	int	ldt;
+#define	KSDF_INITIALIZED	0x01
+	long	flags;
+	void	*base;
+	long	size;
+};
+
 #endif

lib/libpthread/arch/ia64/Makefile.inc

@@ -2,4 +2,4 @@
 
 .PATH:	${.CURDIR}/arch/${MACHINE_ARCH}/${MACHINE_ARCH}
 
-SRCS+=	ksd.c thr_enter_uts.S thr_switch.S
+SRCS+=	thr_enter_uts.S thr_switch.S

lib/libpthread/arch/ia64/include/ksd.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2003 Marcel Moolenaar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	_KSD_H_
+#define	_KSD_H_
+
+struct kse;
+struct pthread;
+
+register struct kse *_tp __asm("%r13");
+
+static __inline int
+_ksd_create(struct ksd *ksd, void *base, int size)
+{
+	ksd->ksd_base = base;
+	ksd->ksd_size = size;
+	return (0);
+}
+
+static __inline struct kse *
+_ksd_curkse()
+{
+	/* XXX why not simply return _tp? */
+	return ((struct kse *)_tp->k_mbx.km_udata);
+}
+
+static __inline struct pthread *
+_ksd_curthread()
+{
+	return (_tp->k_curthread);
+}
+
+static __inline void
+_ksd_destroy(struct ksd *ksd)
+{
+}
+
+static __inline kse_critical_t
+_ksd_get_tmbx()
+{
+	return (_tp->k_mbx.km_curthread);
+}
+
+static __inline kse_critical_t
+_ksd_readandclear_tmbx()
+{
+	kse_critical_t crit;
+	__asm("xchg8    %0=[%1],r0" : "=r"(crit)
+	    : "r"(&_tp->k_mbx.km_curthread));
+	return (crit);
+}
+
+static __inline void
+_ksd_set_tmbx(kse_critical_t crit)
+{
+	_tp->k_mbx.km_curthread = crit;
+}
+
+static __inline int
+_ksd_setprivate(struct ksd *ksd)
+{
+	_tp = (struct kse *)ksd->ksd_base;
+	return (0);
+}
+
+#endif /* _KSD_H_ */

lib/libpthread/arch/ia64/include/pthread_md.h

@@ -35,4 +35,10 @@
 #define	THR_ALIGNBYTES	15
 #define	THR_ALIGN(td)	(((uintptr_t)(td) + THR_ALIGNBYTES) & ~THR_ALIGNBYTES)
 
+/* KSE Specific Data. */
+struct ksd {
+	void	*ksd_base;
+	int	ksd_size;
+};
+
 #endif /* _PTHREAD_MD_H_ */

lib/libpthread/thread/thr_kern.c

@@ -52,8 +52,8 @@ __FBSDID("$FreeBSD$");
 
 #include "atomic_ops.h"
 #include "thr_private.h"
-#include "pthread_md.h"
 #include "libc_private.h"
+#include "ksd.h"
 
 /*#define DEBUG_THREAD_KERN */
 #ifdef DEBUG_THREAD_KERN

lib/libpthread/thread/thr_private.h

@@ -54,7 +54,6 @@
 #include <pthread.h>
 #include <pthread_np.h>
 
-#include "ksd.h"
 #include "lock.h"
 #include "pthread_md.h"