- Split out the support for per-CPU data from the SMP code. UP kernels

  have per-CPU data and gdb on the i386 at least needs access to it.
- Clean up includes in kern_idle.c and subr_smp.c.

Reviewed by:	jake

1 files changed, 65 insertions, 0 deletions

diff --git a/sys/kern/subr_pcpu.c b/sys/kern/subr_pcpu.c
new file mode 100644
index 0000000..47ac12e
--- /dev/null
+++ b/sys/kern/subr_pcpu.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2001 Wind River Systems, Inc.
+ * All rights reserved.
+ * Written by: John Baldwin <jhb@FreeBSD.org>
+ *
+ * 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.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * This module provides MI support for per-cpu data.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/pcpu.h>
+
+static struct globaldata *cpuid_to_globaldata[MAXCPU];
+struct cpuhead cpuhead = SLIST_HEAD_INITIALIZER(cpuhead);
+
+/*
+ * Register a struct globaldata.
+ */
+void
+globaldata_register(struct globaldata *globaldata)
+{
+
+	KASSERT(globaldata->gd_cpuid >= 0 && globaldata->gd_cpuid < MAXCPU,
+	    ("globaldata_register: invalid cpuid"));
+	cpuid_to_globaldata[globaldata->gd_cpuid] = globaldata;
+	SLIST_INSERT_HEAD(&cpuhead, globaldata, gd_allcpu);
+}
+
+/*
+ * Locate a struct globaldata by cpu id.
+ */
+struct globaldata *
+globaldata_find(u_int cpuid)
+{
+
+	return (cpuid_to_globaldata[cpuid]);
+}