// SPDX-License-Identifier: GPL-2.0-or-later
/* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board
*
* Copyright ( C ) 2001 Mark Langsdorf ( mark . langsdorf @ amd . com )
* based on sc520cdp . c by Sysgo Real - Time Solutions GmbH
*
* The NetSc520 is a demonstration board for the Elan Sc520 processor available
* from AMD . It has a single back of 16 megs of 32 - bit Flash ROM and another
* 16 megs of SDRAM .
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm /io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
/*
* * The single , 16 megabyte flash bank is divided into four virtual
* * partitions . The first partition is 768 KiB and is intended to
* * store the kernel image loaded by the bootstrap loader . The second
* * partition is 256 KiB and holds the BIOS image . The third
* * partition is 14 . 5 MiB and is intended for the flash file system
* * image . The last partition is 512 KiB and contains another copy
* * of the BIOS image and the reset vector .
* *
* * Only the third partition should be mounted . The first partition
* * should not be mounted , but it can erased and written to using the
* * MTD character routines . The second and fourth partitions should
* * not be touched - it is possible to corrupt the BIOS image by
* * mounting these partitions , and potentially the board will not be
* * recoverable afterwards .
*/
/* partition_info gives details on the logical partitions that the split the
* single flash device into . If the size if zero we use up to the end of the
* device. */
static const struct mtd_partition partition_info[] = {
{
.name = "NetSc520 boot kernel" ,
.offset = 0 ,
.size = 0 xc0000
},
{
.name = "NetSc520 Low BIOS" ,
.offset = 0 xc0000,
.size = 0 x40000
},
{
.name = "NetSc520 file system" ,
.offset = 0 x100000,
.size = 0 xe80000
},
{
.name = "NetSc520 High BIOS" ,
.offset = 0 xf80000,
.size = 0 x80000
},
};
#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
#define WINDOW_SIZE 0 x00100000
#define WINDOW_ADDR 0 x00200000
static struct map_info netsc520_map = {
.name = "netsc520 Flash Bank" ,
.size = WINDOW_SIZE,
.bankwidth = 4 ,
.phys = WINDOW_ADDR,
};
#define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map)
static struct mtd_info *mymtd;
static int __init init_netsc520(void )
{
printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n" ,
(unsigned long long )netsc520_map.size,
(unsigned long long )netsc520_map.phys);
netsc520_map.virt = ioremap(netsc520_map.phys, netsc520_map.size);
if (!netsc520_map.virt) {
printk("Failed to ioremap\n" );
return -EIO;
}
simple_map_init(&netsc520_map);
mymtd = do_map_probe("cfi_probe" , &netsc520_map);
if (!mymtd)
mymtd = do_map_probe("map_ram" , &netsc520_map);
if (!mymtd)
mymtd = do_map_probe("map_rom" , &netsc520_map);
if (!mymtd) {
iounmap(netsc520_map.virt);
return -ENXIO;
}
mymtd->owner = THIS_MODULE;
mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
return 0 ;
}
static void __exit cleanup_netsc520(void )
{
if (mymtd) {
mtd_device_unregister(mymtd);
map_destroy(mymtd);
}
if (netsc520_map.virt) {
iounmap(netsc520_map.virt);
netsc520_map.virt = NULL;
}
}
module_init(init_netsc520);
module_exit(cleanup_netsc520);
MODULE_LICENSE("GPL" );
MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>" );
MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board" );
Messung V0.5 in Prozent C=95 H=100 G=97
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland