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fix firstboot with new MTD map driver
my-mkimage previously did not include the fs_mark of deadc0de because upon formatting of jffs2 partition, U-Boot's CRC validation would not allow the image to boot. This new MTD map will shrink the kernel+rootfs+fs_mark image and recalculate the CRC, so that only the kernel is part of the image validation. This also improves boot time, since less is copied from FLASH->RAM. This is mostly from brcm47xx, just with u-boot image vs TRX partitions. Signed-off-by: Scott Nicholas <scott.nicholas@scottn.us> SVN-Revision: 25176
This commit is contained in:
Florian Fainelli
parent
a5adea5c2a
commit
cc8228dbc6
@ -1,125 +1,341 @@
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/*
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* Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
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* Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
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* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
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* Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* original functions for finding root filesystem from Mike Baker
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* Copyright 2004, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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* Flash mapping for adm8668 boards
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/slab.h>
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#ifdef CONFIG_MTD_PARTITIONS
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#include <linux/mtd/partitions.h>
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#endif
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#include <linux/crc32.h>
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#include <linux/magic.h>
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#include <asm/io.h>
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#define FLASH_SIZE 0x800000
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#define FLASH_PHYS_ADDR 0x10000000
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#define WINDOW_ADDR 0x10000000
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#define WINDOW_SIZE 0x800000
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#define BANKWIDTH 2
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/* first a little bit about the headers i need.. */
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/* just interested in part of the full struct */
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struct squashfs_super_block {
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__le32 s_magic;
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__le32 pad0[9]; /* it's not really padding */
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__le64 bytes_used;
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__le32 s_magic;
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__le32 pad0[9]; /* it's not really padding */
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__le64 bytes_used;
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};
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static struct mtd_info *mymtd;
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static struct map_info nor_map = {
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name: "adm8668-nor",
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size: FLASH_SIZE,
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phys: FLASH_PHYS_ADDR,
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bankwidth: 2,
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#define IH_MAGIC 0x56190527 /* Image Magic Number */
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struct uboot_header {
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uint32_t ih_magic; /* Image Header Magic Number */
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uint32_t ih_hcrc; /* Image Header CRC Checksum */
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uint32_t ih_time; /* Image Creation Timestamp */
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uint32_t ih_size; /* Image Data Size */
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uint32_t ih_load; /* Data Load Address */
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uint32_t ih_ep; /* Entry Point Address */
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uint32_t ih_dcrc; /* Image Data CRC Checksum */
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uint8_t ih_os; /* Operating System */
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uint8_t ih_arch; /* CPU architecture */
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uint8_t ih_type; /* Image Type */
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uint8_t ih_comp; /* Compression Type */
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char ih_name[32]; /* image name */
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};
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static struct mtd_partition nor_parts[] = {
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{ name: "linux", offset: 0x40000, size: FLASH_SIZE - 0x40000, },
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{ name: "rootfs", offset: 0x200000, size: 0x400000, },
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/************************************************/
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static struct mtd_info *adm8668_mtd;
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struct map_info adm8668_map = {
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name: "adm8668-nor",
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size: WINDOW_SIZE,
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phys: WINDOW_ADDR,
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bankwidth: BANKWIDTH,
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};
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#ifdef CONFIG_MTD_PARTITIONS
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/*
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* Copied from mtdblock.c
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*
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* Cache stuff...
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*
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* Since typical flash erasable sectors are much larger than what Linux's
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* buffer cache can handle, we must implement read-modify-write on flash
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* sectors for each block write requests. To avoid over-erasing flash sectors
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* and to speed things up, we locally cache a whole flash sector while it is
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* being written to until a different sector is required.
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*/
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static void erase_callback(struct erase_info *done)
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{
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wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
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wake_up(wait_q);
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}
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static int erase_write (struct mtd_info *mtd, unsigned long pos,
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int len, const char *buf)
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{
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struct erase_info erase;
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DECLARE_WAITQUEUE(wait, current);
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wait_queue_head_t wait_q;
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size_t retlen;
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int ret;
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/*
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* First, let's erase the flash block.
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*/
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init_waitqueue_head(&wait_q);
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erase.mtd = mtd;
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erase.callback = erase_callback;
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erase.addr = pos;
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erase.len = len;
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erase.priv = (u_long)&wait_q;
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set_current_state(TASK_INTERRUPTIBLE);
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add_wait_queue(&wait_q, &wait);
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ret = mtd->erase(mtd, &erase);
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if (ret) {
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&wait_q, &wait);
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printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
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"on \"%s\" failed\n",
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pos, len, mtd->name);
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return ret;
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}
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schedule(); /* Wait for erase to finish. */
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remove_wait_queue(&wait_q, &wait);
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/*
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* Next, write data to flash.
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*/
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ret = mtd->write (mtd, pos, len, &retlen, buf);
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if (ret)
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return ret;
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if (retlen != len)
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return -EIO;
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return 0;
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}
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/* decent defaults in case... shrug */
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static struct mtd_partition adm8668_parts[] = {
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{ name: "linux", offset: 0x40000, size: WINDOW_SIZE-0x40000, },
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{ name: "rootfs", offset: 0xe0000, size: 0x140000, },
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{ name: "uboot_env", offset: 0x20000, size: 0x20000, },
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{ name: NULL, },
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};
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int __init init_mtd_partitions(struct mtd_info *mtd, size_t size)
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/* in case i wanna change stuff later, and to clarify the math section... */
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#define PART_LINUX 0
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#define PART_ROOTFS 1
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#define NR_PARTS 3
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static int __init
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init_mtd_partitions(struct mtd_info *mtd, size_t size)
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{
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int blocksize, off;
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size_t len;
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struct squashfs_super_block hdr;
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struct uboot_header uhdr;
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int off, blocksize;
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size_t len, linux_len;
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struct squashfs_super_block shdr;
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blocksize = mtd->erasesize;
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if (blocksize < 0x10000)
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blocksize = 0x10000;
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memset(&hdr, 0xe5, sizeof(hdr));
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/* find and size squashfs */
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for (off = (128*1024); off < size; off += blocksize) {
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if (mtd->read(mtd, off, sizeof(hdr), &len, (char *)&hdr) ||
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len != sizeof(hdr))
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/* now find squashfs */
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memset(&shdr, 0xe5, sizeof(shdr));
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for (off = adm8668_parts[PART_LINUX].offset; off < size; off += blocksize) {
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/*
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* Read into buffer
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*/
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if (mtd->read(mtd, off, sizeof(shdr), &len, (char *)&shdr) ||
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len != sizeof(shdr))
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continue;
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if (hdr.s_magic == SQUASHFS_MAGIC) {
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printk(KERN_INFO "%s: Filesystem type: squashfs, off=%#x size=%#x\n",
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mtd->name, off, (unsigned int)hdr.bytes_used);
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/* Update the squashfs start address only! */
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nor_parts[1].offset = off;
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nor_parts[1].size = FLASH_SIZE - off;
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return 2;
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if (shdr.s_magic == SQUASHFS_MAGIC) {
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uint32_t fs_size = (uint32_t)shdr.bytes_used;
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printk(KERN_INFO "%s: Filesystem type: squashfs, size=%dkB\n",
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mtd->name, fs_size>>10);
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/* Update rootfs based on the superblock info, and
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* stretch to end of MTD. rootfs_split will split it */
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adm8668_parts[PART_ROOTFS].offset = off;
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adm8668_parts[PART_ROOTFS].size = mtd->size -
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adm8668_parts[PART_ROOTFS].offset;
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/* kernel ends where rootfs starts
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* but we'll keep it full-length for upgrades */
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linux_len = adm8668_parts[PART_LINUX+1].offset -
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adm8668_parts[PART_LINUX].offset;
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#if 1
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adm8668_parts[PART_LINUX].size = mtd->size -
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adm8668_parts[PART_LINUX].offset;
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#else
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adm8668_parts[PART_LINUX].size = linux_len;
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#endif
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goto found;
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}
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}
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return 2;
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printk(KERN_NOTICE
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"%s: Couldn't find root filesystem\n",
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mtd->name);
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return NR_PARTS;
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found:
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if (mtd->read(mtd, adm8668_parts[PART_LINUX].offset, sizeof(uhdr), &len, (char *)&uhdr) ||
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len != sizeof(uhdr))
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return NR_PARTS;
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/* that's odd. how'd ya boot it then */
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if (uhdr.ih_magic != IH_MAGIC)
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return NR_PARTS;
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if (be32_to_cpu(uhdr.ih_size) != (linux_len - sizeof(uhdr))) {
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unsigned char *block, *data = (unsigned char *)(WINDOW_ADDR | (adm8668_parts[PART_LINUX].offset + sizeof(struct uboot_header)) | 0xA0000000);
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printk(KERN_NOTICE "Updating U-boot image:\n");
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printk(KERN_NOTICE " old: [size: %8d crc32: 0x%08x]\n",
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be32_to_cpu(uhdr.ih_size), be32_to_cpu(uhdr.ih_dcrc));
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/* Update the data length & crc32 */
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uhdr.ih_size = cpu_to_be32(linux_len - sizeof(uhdr));
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uhdr.ih_dcrc = crc32_le(~0, data, linux_len - sizeof(uhdr)) ^ (~0);
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uhdr.ih_dcrc = cpu_to_be32(uhdr.ih_dcrc);
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printk(KERN_NOTICE " new: [size: %8d crc32: 0x%08x]\n",
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be32_to_cpu(uhdr.ih_size), be32_to_cpu(uhdr.ih_dcrc));
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/* update header's crc... */
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uhdr.ih_hcrc = 0;
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uhdr.ih_hcrc = crc32_le(~0, (unsigned char *)&uhdr,
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sizeof(uhdr)) ^ (~0);
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uhdr.ih_hcrc = cpu_to_be32(uhdr.ih_hcrc);
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/* read first eraseblock from the image */
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block = kmalloc(mtd->erasesize, GFP_KERNEL);
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if (mtd->read(mtd, adm8668_parts[PART_LINUX].offset, mtd->erasesize, &len, block) || len != mtd->erasesize) {
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printk("Error copying first eraseblock\n");
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return 0;
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}
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/* Write updated header to the flash */
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memcpy(block, &uhdr, sizeof(uhdr));
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if (mtd->unlock)
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mtd->unlock(mtd, off, mtd->erasesize);
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erase_write(mtd, adm8668_parts[PART_LINUX].offset, mtd->erasesize, block);
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if (mtd->sync)
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mtd->sync(mtd);
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kfree(block);
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printk(KERN_NOTICE "Done\n");
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}
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return NR_PARTS;
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}
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int __init init_nor(void)
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#endif
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int __init init_adm8668_map(void)
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{
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int nr_parts;
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#ifdef CONFIG_MTD_PARTITIONS
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int nr_parts, ret;
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#endif
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printk(KERN_NOTICE "ADM8668 NOR flash device: %#x at %#x\n",
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FLASH_SIZE, FLASH_PHYS_ADDR);
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adm8668_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
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nor_map.virt = ioremap(FLASH_PHYS_ADDR, FLASH_SIZE);
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if (!nor_map.virt) {
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printk("Failed to ioremap\n");
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if (!adm8668_map.virt) {
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printk(KERN_ERR "Failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&nor_map);
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mymtd = do_map_probe("cfi_probe", &nor_map);
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if (!mymtd) {
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iounmap((void *)nor_map.virt);
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simple_map_init(&adm8668_map);
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if (!(adm8668_mtd = do_map_probe("cfi_probe", &adm8668_map))) {
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printk(KERN_ERR "cfi_probe failed\n");
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iounmap((void *)adm8668_map.virt);
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return -ENXIO;
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}
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mymtd->owner = THIS_MODULE;
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nr_parts = init_mtd_partitions(mymtd, mymtd->size);
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add_mtd_partitions(mymtd, nor_parts, nr_parts);
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adm8668_mtd->owner = THIS_MODULE;
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#ifdef CONFIG_MTD_PARTITIONS
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nr_parts = init_mtd_partitions(adm8668_mtd, adm8668_mtd->size);
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ret = add_mtd_partitions(adm8668_mtd, adm8668_parts, nr_parts);
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if (ret) {
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printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
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goto fail;
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}
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#endif
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return 0;
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fail:
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if (adm8668_mtd)
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map_destroy(adm8668_mtd);
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if (adm8668_map.virt)
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iounmap((void *) adm8668_map.virt);
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adm8668_map.virt = 0;
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return ret;
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}
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static void __exit cleanup_nor(void)
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void __exit cleanup_adm8668_map(void)
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{
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if (mymtd) {
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del_mtd_partitions(mymtd);
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map_destroy(mymtd);
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}
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if (nor_map.virt) {
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iounmap((void *)nor_map.virt);
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nor_map.virt = 0;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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del_mtd_partitions(adm8668_mtd);
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#endif
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map_destroy(adm8668_mtd);
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iounmap((void *) adm8668_map.virt);
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adm8668_map.virt = 0;
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}
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module_init(init_nor);
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module_exit(cleanup_nor);
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module_init(init_adm8668_map);
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module_exit(cleanup_adm8668_map);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Scott Nicholas <neutronscott@scottn.us>");
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@ -16,11 +16,14 @@ define Image/Prepare
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$(MAKE) -C lzma-loader \
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KDIR="$(KDIR)" \
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clean compile
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rm -f $(KDIR)/fs_mark
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touch $(KDIR)/fs_mark
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$(call prepare_generic_squashfs,$(KDIR)/fs_mark)
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endef
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define Image/Build
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./my-mkimage $(KDIR)/loader.bin $(KDIR)/root.squashfs \
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$(BIN_DIR)/$(IMG_PREFIX)-$(1).bin
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$(KDIR)/fs_mark $(BIN_DIR)/$(IMG_PREFIX)-$(1).bin
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endef
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$(eval $(call BuildImage))
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@ -1,26 +1,32 @@
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#!/bin/sh
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# my-mkimage
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# This will just pad the kernel partition to 64k boundary, then add rootfs.
|
||||
# but we have to be fancy because u-boot mkimage is going to add 64 byte header.
|
||||
# This will pad given files to 64k boundaries to make a single u-boot image.
|
||||
# we have to be fancy because u-boot mkimage is going to add 64 byte header, ...
|
||||
# and i only know basic arithmetic.. ;)
|
||||
#
|
||||
# Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
|
||||
[ $# -lt 2 ] && {
|
||||
echo usage: $0 loader.bin [rootfs.squashfs [fs_mark [...]]] output.bin
|
||||
}
|
||||
|
||||
PATH_LOADER=$1
|
||||
PATH_ROOTFS=$2
|
||||
OUTPUT=$3
|
||||
|
||||
# todo - check arguments...? nah...
|
||||
if [ -x $OUTPUT ]; then
|
||||
echo usage: $0 loader.bin root.squashfs output.bin
|
||||
exit
|
||||
fi
|
||||
|
||||
OLDSIZE=$(stat -c%s $PATH_LOADER)
|
||||
OLDSIZE=$(stat -c%s $1)
|
||||
NEWSIZE=$(((OLDSIZE / 65536 + 1) * 65536 - 64))
|
||||
|
||||
dd if=$PATH_LOADER of=vmlinuz.tmp bs=$NEWSIZE conv=sync
|
||||
cat $PATH_ROOTFS >>vmlinuz.tmp
|
||||
../../../../staging_dir/host/bin/mkimage -A mips -O linux -T kernel -C none -a 0x400000 -e 0x400000 -n "ADM8668 Linux Kernel(2.4.31)" -d vmlinuz.tmp $OUTPUT
|
||||
rm vmlinuz.tmp
|
||||
dd if=$1 of=vmlinuz.tmp bs=$NEWSIZE conv=sync >/dev/null 2>&1
|
||||
shift
|
||||
appends=$(($# - 1))
|
||||
echo
|
||||
while [ $appends -gt 0 ]; do
|
||||
dd if=$1 of=temp bs=64k conv=sync >/dev/null 2>&1
|
||||
printf "### '%s' starts at 0x%x\n" "`basename $1`" "$((NEWSIZE+64))"
|
||||
cat temp >>vmlinuz.tmp
|
||||
shift
|
||||
appends=$((appends-1))
|
||||
NEWSIZE=$(stat -c%s vmlinuz.tmp)
|
||||
done
|
||||
echo
|
||||
../../../../staging_dir/host/bin/mkimage -A mips -O linux -T kernel \
|
||||
-C none -a 0x80400000 -e 0x80400000 -n "ADM8668 Linux Kernel(2.4.31)" \
|
||||
-d vmlinuz.tmp $1
|
||||
|
||||
printf '\n\nOk done, now your squashfs starts on an erase boundary of %x :)\n\n' $((NEWSIZE+64))
|
||||
rm temp vmlinuz.tmp
|
||||
|
||||
Loading…
Reference in New Issue
Block a user