1 files changed, 70 insertions, 0 deletions

diff --git a/arch/ppc/boot/common/bootinfo.c b/arch/ppc/boot/common/bootinfo.c
new file mode 100644
index 000000000000..9c6e528940e9
--- /dev/null
+++ b/arch/ppc/boot/common/bootinfo.c
@@ -0,0 +1,70 @@
+/*
+ * arch/ppc/common/bootinfo.c
+ *
+ * General bootinfo record utilities
+ * Author: Randy Vinson <rvinson@mvista.com>
+ *
+ * 2002 (c) MontaVista Software, Inc. This file is licensed under the terms
+ * of the GNU General Public License version 2. This program is licensed
+ * "as is" without any warranty of any kind, whether express or implied.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <asm/bootinfo.h>
+
+#include "nonstdio.h"
+
+static struct bi_record * birec = NULL;
+
+static struct bi_record *
+__bootinfo_build(struct bi_record *rec, unsigned long tag, unsigned long size,
+                 void *data)
+{
+        /* set the tag */
+        rec->tag = tag;
+
+        /* if the caller has any data, copy it */
+        if (size)
+                memcpy(rec->data, (char *)data, size);
+
+        /* set the record size */
+        rec->size = sizeof(struct bi_record) + size;
+
+        /* advance to the next available space */
+        rec = (struct bi_record *)((unsigned long)rec + rec->size);
+
+        return rec;
+}
+
+void
+bootinfo_init(struct bi_record *rec)
+{
+
+        /* save start of birec area */
+        birec = rec;
+
+        /* create an empty list */
+        rec = __bootinfo_build(rec, BI_FIRST, 0, NULL);
+        (void) __bootinfo_build(rec, BI_LAST, 0, NULL);
+
+}
+
+void
+bootinfo_append(unsigned long tag, unsigned long size, void * data)
+{
+
+        struct bi_record *rec = birec;
+
+        /* paranoia */
+        if ((rec == NULL) || (rec->tag != BI_FIRST))
+                return;
+
+        /* find the last entry in the list */
+        while (rec->tag != BI_LAST)
+                rec = (struct bi_record *)((ulong)rec + rec->size);
+
+        /* overlay BI_LAST record with new one and tag on a new BI_LAST */
+        rec = __bootinfo_build(rec, tag, size, data);
+        (void) __bootinfo_build(rec, BI_LAST, 0, NULL);
+}