You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
1.6 KiB
70 lines
1.6 KiB
/*
|
|
* 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);
|
|
}
|
|
|