Overhaul the per-CPU support a bit:

- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake

5 files changed, 14 insertions, 163 deletions

diff --git a/sys/ia64/include/globaldata.h b/sys/ia64/include/globaldata.h
deleted file mode 100644
index 4190c00..0000000
--- a/sys/ia64/include/globaldata.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/*-
- * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
- * Copyright (c) Peter Wemm <peter@netplex.com.au>
- * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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	_MACHINE_GLOBALDATA_H_
-#define	_MACHINE_GLOBALDATA_H_
-
-#ifdef _KERNEL
-
-#include <sys/queue.h>
-
-/*
- * This structure maps out the global data that needs to be kept on a
- * per-cpu basis.  genassym uses this to generate offsets for the assembler
- * code, which also provides external symbols so that C can get at them as
- * though they were really globals. This structure is pointed to by
- * the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()).
- * Inside the kernel, the globally reserved register t7 is used to
- * point at the globaldata structure.
- */
-struct globaldata {
-	struct	thread *gd_curthread;		/* current thread */
-	struct	thread *gd_idlethread;		/* idle thread */
-	struct	thread *gd_fpcurthread;		/* fp state owner */
-	struct	pcb *gd_curpcb;			/* current pcb */
-	struct	timeval gd_switchtime;	
-	int	gd_switchticks;
-	u_int	gd_cpuid;			/* this cpu number */
-	u_int	gd_other_cpus;			/* all other cpus */
-	u_int64_t	gd_pending_ipis;	/* pending IPI events */
-	struct	pmap *gd_current_pmap;		/* which pmap is active */
-	u_int32_t	gd_next_asn;		/* next ASN to allocate */
-	u_int32_t	gd_current_asngen;	/* ASN rollover check */
-
-	SLIST_ENTRY(globaldata) gd_allcpu;
-	struct	lock_list_entry *gd_spinlocks;
-#ifdef KTR_PERCPU
-	int	gd_ktr_idx;			/* Index into trace table */
-	char	*gd_ktr_buf;
-	char	gd_ktr_buf_data[0];
-#endif
-};
-
-void globaldata_init(struct globaldata *pcpu, int cpuid, size_t sz);
-
-#endif	/* _KERNEL */
-
-#endif	/* !_MACHINE_GLOBALDATA_H_ */
diff --git a/sys/ia64/include/globals.h b/sys/ia64/include/globals.h
deleted file mode 100644
index 366d89b..0000000
--- a/sys/ia64/include/globals.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*-
- * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
- * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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	_MACHINE_GLOBALS_H_
-#define	_MACHINE_GLOBALS_H_
-
-#ifdef _KERNEL
-#include <machine/globaldata.h>
-
-register struct globaldata *globalp __asm__("r13");
-
-#define	GLOBALP	globalp
-
-#define	PCPU_GET(member)	(GLOBALP->gd_ ## member)
-#define	PCPU_PTR(member)	(&GLOBALP->gd_ ## member)
-#define	PCPU_SET(member,value)	(GLOBALP->gd_ ## member = (value))
-
-#define	curthread		PCPU_GET(curthread)
-#define	CURPROC  		(curthread->td_proc)
-#define	curproc  		(curthread->td_proc)
-#define	curksegrp		(curthread->td_ksegrp)
-#define	curkse			(curthread->td_kse)
-
-#endif	/* _KERNEL */
-
-#endif	/* !_MACHINE_GLOBALS_H_ */
diff --git a/sys/ia64/include/mutex.h b/sys/ia64/include/mutex.h
index 6581d70..b14d7ae 100644
--- a/sys/ia64/include/mutex.h
+++ b/sys/ia64/include/mutex.h
@@ -49,7 +49,7 @@
  */
 #define MTX_ENTER(lck, rPSR, rOLD, rNEW, rLCK)		\
 	mov	rPSR=psr ;				\
-	mov	rNEW=globalp ;				\
+	mov	rNEW=pcpup ;				\
 	addl	rLCK=@ltoff(lck),gp ;;			\
 	ld8	rLCK=[rLCK] ;;				\
 	add	rLCK=MTX_LOCK,rLCK ;;			\
diff --git a/sys/ia64/include/pcpu.h b/sys/ia64/include/pcpu.h
index 4190c00..0c6111d 100644
--- a/sys/ia64/include/pcpu.h
+++ b/sys/ia64/include/pcpu.h
@@ -27,47 +27,25 @@
  * $FreeBSD$
  */
 
-#ifndef	_MACHINE_GLOBALDATA_H_
-#define	_MACHINE_GLOBALDATA_H_
+#ifndef	_MACHINE_PCPU_H_
+#define	_MACHINE_PCPU_H_
 
 #ifdef _KERNEL
 
-#include <sys/queue.h>
+#define	PCPU_MD_FIELDS							\
+	u_int64_t	pc_pending_ipis;	/* pending IPIs */	\
+	struct pmap	*pc_current_pmap;	/* active pmap */	\
+	u_int32_t	pc_next_asn;		/* next ASN to alloc */	\
+	u_int32_t	pc_current_asngen	/* ASN rollover check */
 
-/*
- * This structure maps out the global data that needs to be kept on a
- * per-cpu basis.  genassym uses this to generate offsets for the assembler
- * code, which also provides external symbols so that C can get at them as
- * though they were really globals. This structure is pointed to by
- * the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()).
- * Inside the kernel, the globally reserved register t7 is used to
- * point at the globaldata structure.
- */
-struct globaldata {
-	struct	thread *gd_curthread;		/* current thread */
-	struct	thread *gd_idlethread;		/* idle thread */
-	struct	thread *gd_fpcurthread;		/* fp state owner */
-	struct	pcb *gd_curpcb;			/* current pcb */
-	struct	timeval gd_switchtime;	
-	int	gd_switchticks;
-	u_int	gd_cpuid;			/* this cpu number */
-	u_int	gd_other_cpus;			/* all other cpus */
-	u_int64_t	gd_pending_ipis;	/* pending IPI events */
-	struct	pmap *gd_current_pmap;		/* which pmap is active */
-	u_int32_t	gd_next_asn;		/* next ASN to allocate */
-	u_int32_t	gd_current_asngen;	/* ASN rollover check */
+struct pcpu;
 
-	SLIST_ENTRY(globaldata) gd_allcpu;
-	struct	lock_list_entry *gd_spinlocks;
-#ifdef KTR_PERCPU
-	int	gd_ktr_idx;			/* Index into trace table */
-	char	*gd_ktr_buf;
-	char	gd_ktr_buf_data[0];
-#endif
-};
+register struct pcpu *pcpup __asm__("r13");
 
-void globaldata_init(struct globaldata *pcpu, int cpuid, size_t sz);
+#define	PCPU_GET(member)	(pcpup->pc_ ## member)
+#define	PCPU_PTR(member)	(&pcpup->pc_ ## member)
+#define	PCPU_SET(member,value)	(pcpup->pc_ ## member = (value))
 
 #endif	/* _KERNEL */
 
-#endif	/* !_MACHINE_GLOBALDATA_H_ */
+#endif	/* !_MACHINE_PCPU_H_ */
diff --git a/sys/ia64/include/proc.h b/sys/ia64/include/proc.h
index a9b6bfe..c9ae251 100644
--- a/sys/ia64/include/proc.h
+++ b/sys/ia64/include/proc.h
@@ -31,9 +31,6 @@
 #ifndef _MACHINE_PROC_H_
 #define	_MACHINE_PROC_H_
 
-#include <machine/globaldata.h>
-#include <machine/globals.h>
-
 /*
  * Machine-dependent part of the proc struct for the Alpha.
  */