[linux-block.git] / drivers / mtd / devices / slram.c

// SPDX-License-Identifier: GPL-2.0-only
/*======================================================================

  This driver provides a method to access memory not used by the kernel
  itself (i.e. if the kernel commandline mem=xxx is used). To actually
  use slram at least mtdblock or mtdchar is required (for block or
  character device access).

  Usage:

  if compiled as loadable module:
    modprobe slram map=<name>,<start>,<end/offset>
  if statically linked into the kernel use the following kernel cmd.line
    slram=<name>,<start>,<end/offset>

  <name>: name of the device that will be listed in /proc/mtd
  <start>: start of the memory region, decimal or hex (0xabcdef)
  <end/offset>: end of the memory region. It's possible to use +0x1234
                to specify the offset instead of the absolute address

  NOTE:
  With slram it's only possible to map a contiguous memory region. Therefore
  if there's a device mapped somewhere in the region specified slram will
  fail to load (see kernel log if modprobe fails).

  -

  Jochen Schaeuble <psionic@psionic.de>

======================================================================*/


#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/init.h>
#include <linux/io.h>

#include <linux/mtd/mtd.h>

#define SLRAM_MAX_DEVICES_PARAMS 6		/* 3 parameters / device */
#define SLRAM_BLK_SZ 0x4000

#define T(fmt, args...) printk(KERN_DEBUG fmt, ## args)
#define E(fmt, args...) printk(KERN_NOTICE fmt, ## args)

typedef struct slram_priv {
	u_char *start;
	u_char *end;
} slram_priv_t;

typedef struct slram_mtd_list {
	struct mtd_info *mtdinfo;
	struct slram_mtd_list *next;
} slram_mtd_list_t;

#ifdef MODULE
static char *map[SLRAM_MAX_DEVICES_PARAMS];

module_param_array(map, charp, NULL, 0);
MODULE_PARM_DESC(map, "List of memory regions to map. \"map=<name>, <start>, <length / end>\"");
#else
static char *map;
#endif

static slram_mtd_list_t *slram_mtdlist = NULL;

static int slram_erase(struct mtd_info *, struct erase_info *);
static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, void **,
		resource_size_t *);
static int slram_unpoint(struct mtd_info *, loff_t, size_t);
static int slram_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int slram_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);

static int slram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
	slram_priv_t *priv = mtd->priv;

	memset(priv->start + instr->addr, 0xff, instr->len);

	return(0);
}

static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, void **virt, resource_size_t *phys)
{
	slram_priv_t *priv = mtd->priv;

	*virt = priv->start + from;
	*retlen = len;
	return(0);
}

static int slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
	return 0;
}

static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, u_char *buf)
{
	slram_priv_t *priv = mtd->priv;

	memcpy(buf, priv->start + from, len);
	*retlen = len;
	return(0);
}

static int slram_write(struct mtd_info *mtd, loff_t to, size_t len,
		size_t *retlen, const u_char *buf)
{
	slram_priv_t *priv = mtd->priv;

	memcpy(priv->start + to, buf, len);
	*retlen = len;
	return(0);
}

/*====================================================================*/

static int register_device(char *name, unsigned long start, unsigned long length)
{
	slram_mtd_list_t **curmtd;

	curmtd = &slram_mtdlist;
	while (*curmtd) {
		curmtd = &(*curmtd)->next;
	}

	*curmtd = kmalloc(sizeof(slram_mtd_list_t), GFP_KERNEL);
	if (!(*curmtd)) {
		E("slram: Cannot allocate new MTD device.\n");
		return(-ENOMEM);
	}
	(*curmtd)->mtdinfo = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
	(*curmtd)->next = NULL;

	if ((*curmtd)->mtdinfo)	{
		(*curmtd)->mtdinfo->priv =
			kzalloc(sizeof(slram_priv_t), GFP_KERNEL);

		if (!(*curmtd)->mtdinfo->priv) {
			kfree((*curmtd)->mtdinfo);
			(*curmtd)->mtdinfo = NULL;
		}
	}

	if (!(*curmtd)->mtdinfo) {
		E("slram: Cannot allocate new MTD device.\n");
		return(-ENOMEM);
	}

	if (!(((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start =
		memremap(start, length,
			 MEMREMAP_WB | MEMREMAP_WT | MEMREMAP_WC))) {
		E("slram: memremap failed\n");
		return -EIO;
	}
	((slram_priv_t *)(*curmtd)->mtdinfo->priv)->end =
		((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start + length;


	(*curmtd)->mtdinfo->name = name;
	(*curmtd)->mtdinfo->size = length;
	(*curmtd)->mtdinfo->flags = MTD_CAP_RAM;
	(*curmtd)->mtdinfo->_erase = slram_erase;
	(*curmtd)->mtdinfo->_point = slram_point;
	(*curmtd)->mtdinfo->_unpoint = slram_unpoint;
	(*curmtd)->mtdinfo->_read = slram_read;
	(*curmtd)->mtdinfo->_write = slram_write;
	(*curmtd)->mtdinfo->owner = THIS_MODULE;
	(*curmtd)->mtdinfo->type = MTD_RAM;
	(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
	(*curmtd)->mtdinfo->writesize = 1;

	if (mtd_device_register((*curmtd)->mtdinfo, NULL, 0))	{
		E("slram: Failed to register new device\n");
		memunmap(((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start);
		kfree((*curmtd)->mtdinfo->priv);
		kfree((*curmtd)->mtdinfo);
		return(-EAGAIN);
	}
	T("slram: Registered device %s from %luKiB to %luKiB\n", name,
			(start / 1024), ((start + length) / 1024));
	T("slram: Mapped from 0x%p to 0x%p\n",
			((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start,
			((slram_priv_t *)(*curmtd)->mtdinfo->priv)->end);
	return(0);
}

static void unregister_devices(void)
{
	slram_mtd_list_t *nextitem;

	while (slram_mtdlist) {
		nextitem = slram_mtdlist->next;
		mtd_device_unregister(slram_mtdlist->mtdinfo);
		memunmap(((slram_priv_t *)slram_mtdlist->mtdinfo->priv)->start);
		kfree(slram_mtdlist->mtdinfo->priv);
		kfree(slram_mtdlist->mtdinfo);
		kfree(slram_mtdlist);
		slram_mtdlist = nextitem;
	}
}

static unsigned long handle_unit(unsigned long value, char *unit)
{
	if ((*unit == 'M') || (*unit == 'm')) {
		return(value * 1024 * 1024);
	} else if ((*unit == 'K') || (*unit == 'k')) {
		return(value * 1024);
	}
	return(value);
}

static int parse_cmdline(char *devname, char *szstart, char *szlength)
{
	char *buffer;
	unsigned long devstart;
	unsigned long devlength;

	if ((!devname) || (!szstart) || (!szlength)) {
		unregister_devices();
		return(-EINVAL);
	}

	devstart = simple_strtoul(szstart, &buffer, 0);
	devstart = handle_unit(devstart, buffer);

	if (*(szlength) != '+') {
		devlength = simple_strtoul(szlength, &buffer, 0);
		devlength = handle_unit(devlength, buffer);
		if (devlength < devstart)
			goto err_out;

		devlength -= devstart;
	} else {
		devlength = simple_strtoul(szlength + 1, &buffer, 0);
		devlength = handle_unit(devlength, buffer);
	}
	T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n",
			devname, devstart, devlength);
	if (devlength % SLRAM_BLK_SZ != 0)
		goto err_out;

	if ((devstart = register_device(devname, devstart, devlength))){
		unregister_devices();
		return((int)devstart);
	}
	return(0);

err_out:
	E("slram: Illegal length parameter.\n");
	return(-EINVAL);
}

#ifndef MODULE

static int __init mtd_slram_setup(char *str)
{
	map = str;
	return(1);
}

__setup("slram=", mtd_slram_setup);

#endif

static int __init init_slram(void)
{
	char *devname;

#ifndef MODULE
	char *devstart;
	char *devlength;

	if (!map) {
		E("slram: not enough parameters.\n");
		return(-EINVAL);
	}
	while (map) {
		devname = devstart = devlength = NULL;

		if (!(devname = strsep(&map, ","))) {
			E("slram: No devicename specified.\n");
			break;
		}
		T("slram: devname = %s\n", devname);
		if ((!map) || (!(devstart = strsep(&map, ",")))) {
			E("slram: No devicestart specified.\n");
		}
		T("slram: devstart = %s\n", devstart);
		if ((!map) || (!(devlength = strsep(&map, ",")))) {
			E("slram: No devicelength / -end specified.\n");
		}
		T("slram: devlength = %s\n", devlength);
		if (parse_cmdline(devname, devstart, devlength) != 0) {
			return(-EINVAL);
		}
	}
#else
	int count;
	int i;

	for (count = 0; count < SLRAM_MAX_DEVICES_PARAMS && map[count];
			count++) {
	}

	if ((count % 3 != 0) || (count == 0)) {
		E("slram: not enough parameters.\n");
		return(-EINVAL);
	}
	for (i = 0; i < (count / 3); i++) {
		devname = map[i * 3];

		if (parse_cmdline(devname, map[i * 3 + 1], map[i * 3 + 2])!=0) {
			return(-EINVAL);
		}

	}
#endif /* !MODULE */

	return(0);
}

static void __exit cleanup_slram(void)
{
	unregister_devices();
}

module_init(init_slram);
module_exit(cleanup_slram);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jochen Schaeuble <psionic@psionic.de>");
MODULE_DESCRIPTION("MTD driver for uncached system RAM");
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*======================================================================
1da177e4 LT	3
1da177e4 LT	4	This driver provides a method to access memory not used by the kernel
	5	itself (i.e. if the kernel commandline mem=xxx is used). To actually
	6	use slram at least mtdblock or mtdchar is required (for block or
	7	character device access).
	8
	9	Usage:
	10
	11	if compiled as loadable module:
	12	modprobe slram map=<name>,<start>,<end/offset>
	13	if statically linked into the kernel use the following kernel cmd.line
	14	slram=<name>,<start>,<end/offset>
	15
	16	<name>: name of the device that will be listed in /proc/mtd
	17	<start>: start of the memory region, decimal or hex (0xabcdef)
	18	<end/offset>: end of the memory region. It's possible to use +0x1234
	19	to specify the offset instead of the absolute address
e5580fbe	20
1da177e4	21	NOTE:
af901ca1	22	With slram it's only possible to map a contiguous memory region. Therefore
1da177e4 LT	23	if there's a device mapped somewhere in the region specified slram will
	24	fail to load (see kernel log if modprobe fails).
	25
	26	-
e5580fbe	27
1da177e4 LT	28	Jochen Schaeuble <psionic@psionic.de>
	29
	30	======================================================================*/
	31
	32
	33	#include <linux/module.h>
7c0f6ba6	34	#include <linux/uaccess.h>
1da177e4 LT	35	#include <linux/types.h>
1da177e4 LT	36	#include <linux/kernel.h>
1da177e4 LT	37	#include <linux/ptrace.h>
	38	#include <linux/slab.h>
	39	#include <linux/string.h>
	40	#include <linux/timer.h>
	41	#include <linux/major.h>
	42	#include <linux/fs.h>
	43	#include <linux/ioctl.h>
	44	#include <linux/init.h>
2584cf83	45	#include <linux/io.h>
1da177e4 LT	46
	47	#include <linux/mtd/mtd.h>
	48
	49	#define SLRAM_MAX_DEVICES_PARAMS 6 /* 3 parameters / device */
14f8351a	50	#define SLRAM_BLK_SZ 0x4000
1da177e4 LT	51
	52	#define T(fmt, args...) printk(KERN_DEBUG fmt, ## args)
	53	#define E(fmt, args...) printk(KERN_NOTICE fmt, ## args)
	54
	55	typedef struct slram_priv {
	56	u_char *start;
	57	u_char *end;
	58	} slram_priv_t;
	59
	60	typedef struct slram_mtd_list {
	61	struct mtd_info *mtdinfo;
	62	struct slram_mtd_list *next;
	63	} slram_mtd_list_t;
	64
	65	#ifdef MODULE
	66	static char *map[SLRAM_MAX_DEVICES_PARAMS];
	67
	68	module_param_array(map, charp, NULL, 0);
	69	MODULE_PARM_DESC(map, "List of memory regions to map. \"map=<name>, <start>, <length / end>\"");
	70	#else
	71	static char *map;
	72	#endif
	73
	74	static slram_mtd_list_t *slram_mtdlist = NULL;
	75
	76	static int slram_erase(struct mtd_info , struct erase_info );
a98889f3 JH	77	static int slram_point(struct mtd_info , loff_t, size_t, size_t , void **,
a98889f3 JH	78	resource_size_t *);
5e4e6e3f	79	static int slram_unpoint(struct mtd_info *, loff_t, size_t);
1da177e4 LT	80	static int slram_read(struct mtd_info , loff_t, size_t, size_t , u_char *);
	81	static int slram_write(struct mtd_info , loff_t, size_t, size_t , const u_char *);
	82
	83	static int slram_erase(struct mtd_info mtd, struct erase_info instr)
	84	{
	85	slram_priv_t *priv = mtd->priv;
	86
1da177e4	87	memset(priv->start + instr->addr, 0xff, instr->len);
e7bfb3fd	88
1da177e4 LT	89	return(0);
	90	}
	91
	92	static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
a98889f3	93	size_t retlen, void virt, resource_size_t phys)
1da177e4 LT	94	{
	95	slram_priv_t *priv = mtd->priv;
	96
a98889f3	97	*virt = priv->start + from;
1da177e4 LT	98	*retlen = len;
	99	return(0);
	100	}
	101
5e4e6e3f	102	static int slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
1da177e4	103	{
5e4e6e3f	104	return 0;
1da177e4 LT	105	}
	106
	107	static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
	108	size_t retlen, u_char buf)
	109	{
	110	slram_priv_t *priv = mtd->priv;
14f8351a	111
1da177e4	112	memcpy(buf, priv->start + from, len);
1da177e4 LT	113	*retlen = len;
	114	return(0);
	115	}
	116
	117	static int slram_write(struct mtd_info *mtd, loff_t to, size_t len,
	118	size_t retlen, const u_char buf)
	119	{
	120	slram_priv_t *priv = mtd->priv;
	121
	122	memcpy(priv->start + to, buf, len);
1da177e4 LT	123	*retlen = len;
	124	return(0);
	125	}
	126
	127	/====================================================================/
	128
	129	static int register_device(char *name, unsigned long start, unsigned long length)
	130	{
	131	slram_mtd_list_t **curmtd;
	132
	133	curmtd = &slram_mtdlist;
	134	while (*curmtd) {
	135	curmtd = &(*curmtd)->next;
	136	}
	137
	138	*curmtd = kmalloc(sizeof(slram_mtd_list_t), GFP_KERNEL);
	139	if (!(*curmtd)) {
	140	E("slram: Cannot allocate new MTD device.\n");
	141	return(-ENOMEM);
	142	}
95b93a0c	143	(*curmtd)->mtdinfo = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
1da177e4	144	(*curmtd)->next = NULL;
e5580fbe	145
1da177e4	146	if ((*curmtd)->mtdinfo) {
1da177e4	147	(*curmtd)->mtdinfo->priv =
95b93a0c	148	kzalloc(sizeof(slram_priv_t), GFP_KERNEL);
e5580fbe	149
1da177e4 LT	150	if (!(*curmtd)->mtdinfo->priv) {
	151	kfree((*curmtd)->mtdinfo);
	152	(*curmtd)->mtdinfo = NULL;
1da177e4 LT	153	}
	154	}
	155
	156	if (!(*curmtd)->mtdinfo) {
	157	E("slram: Cannot allocate new MTD device.\n");
	158	return(-ENOMEM);
	159	}
e5580fbe	160
1da177e4	161	if (!(((slram_priv_t )(curmtd)->mtdinfo->priv)->start =
cb9e2063 RF	162	memremap(start, length,
	163	MEMREMAP_WB \| MEMREMAP_WT \| MEMREMAP_WC))) {
	164	E("slram: memremap failed\n");
1da177e4 LT	165	return -EIO;
	166	}
	167	((slram_priv_t )(curmtd)->mtdinfo->priv)->end =
	168	((slram_priv_t )(curmtd)->mtdinfo->priv)->start + length;
	169
	170
	171	(*curmtd)->mtdinfo->name = name;
	172	(*curmtd)->mtdinfo->size = length;
a6c591ed	173	(*curmtd)->mtdinfo->flags = MTD_CAP_RAM;
3c3c10bb AB	174	(*curmtd)->mtdinfo->_erase = slram_erase;
	175	(*curmtd)->mtdinfo->_point = slram_point;
	176	(*curmtd)->mtdinfo->_unpoint = slram_unpoint;
	177	(*curmtd)->mtdinfo->_read = slram_read;
	178	(*curmtd)->mtdinfo->_write = slram_write;
1da177e4	179	(*curmtd)->mtdinfo->owner = THIS_MODULE;
21c8db9e	180	(*curmtd)->mtdinfo->type = MTD_RAM;
14f8351a	181	(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
17ffc7ba	182	(*curmtd)->mtdinfo->writesize = 1;
1da177e4	183
ee0e87b1	184	if (mtd_device_register((*curmtd)->mtdinfo, NULL, 0)) {
1da177e4	185	E("slram: Failed to register new device\n");
cb9e2063	186	memunmap(((slram_priv_t )(curmtd)->mtdinfo->priv)->start);
1da177e4 LT	187	kfree((*curmtd)->mtdinfo->priv);
	188	kfree((*curmtd)->mtdinfo);
	189	return(-EAGAIN);
	190	}
	191	T("slram: Registered device %s from %luKiB to %luKiB\n", name,
	192	(start / 1024), ((start + length) / 1024));
	193	T("slram: Mapped from 0x%p to 0x%p\n",
	194	((slram_priv_t )(curmtd)->mtdinfo->priv)->start,
	195	((slram_priv_t )(curmtd)->mtdinfo->priv)->end);
e5580fbe	196	return(0);
1da177e4 LT	197	}
	198
	199	static void unregister_devices(void)
	200	{
	201	slram_mtd_list_t *nextitem;
	202
	203	while (slram_mtdlist) {
	204	nextitem = slram_mtdlist->next;
ee0e87b1	205	mtd_device_unregister(slram_mtdlist->mtdinfo);
cb9e2063	206	memunmap(((slram_priv_t *)slram_mtdlist->mtdinfo->priv)->start);
1da177e4 LT	207	kfree(slram_mtdlist->mtdinfo->priv);
	208	kfree(slram_mtdlist->mtdinfo);
	209	kfree(slram_mtdlist);
	210	slram_mtdlist = nextitem;
	211	}
	212	}
	213
	214	static unsigned long handle_unit(unsigned long value, char *unit)
	215	{
	216	if ((unit == 'M') \|\| (unit == 'm')) {
	217	return(value * 1024 * 1024);
	218	} else if ((unit == 'K') \|\| (unit == 'k')) {
	219	return(value * 1024);
	220	}
	221	return(value);
	222	}
	223
	224	static int parse_cmdline(char devname, char szstart, char *szlength)
	225	{
	226	char *buffer;
	227	unsigned long devstart;
	228	unsigned long devlength;
e5580fbe	229
1da177e4 LT	230	if ((!devname) \|\| (!szstart) \|\| (!szlength)) {
	231	unregister_devices();
	232	return(-EINVAL);
	233	}
	234
	235	devstart = simple_strtoul(szstart, &buffer, 0);
	236	devstart = handle_unit(devstart, buffer);
e5580fbe	237
1da177e4 LT	238	if (*(szlength) != '+') {
1da177e4 LT	239	devlength = simple_strtoul(szlength, &buffer, 0);
c36a7ff4	240	devlength = handle_unit(devlength, buffer);
3afd522d RK	241	if (devlength < devstart)
	242	goto err_out;
	243
	244	devlength -= devstart;
1da177e4 LT	245	} else {
	246	devlength = simple_strtoul(szlength + 1, &buffer, 0);
	247	devlength = handle_unit(devlength, buffer);
	248	}
	249	T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n",
	250	devname, devstart, devlength);
3afd522d RK	251	if (devlength % SLRAM_BLK_SZ != 0)
3afd522d RK	252	goto err_out;
e5580fbe	253
1da177e4 LT	254	if ((devstart = register_device(devname, devstart, devlength))){
	255	unregister_devices();
	256	return((int)devstart);
	257	}
	258	return(0);
3afd522d RK	259
	260	err_out:
	261	E("slram: Illegal length parameter.\n");
	262	return(-EINVAL);
1da177e4 LT	263	}
	264
	265	#ifndef MODULE
	266
	267	static int __init mtd_slram_setup(char *str)
	268	{
	269	map = str;
	270	return(1);
	271	}
	272
	273	__setup("slram=", mtd_slram_setup);
	274
	275	#endif
	276
627df23c	277	static int __init init_slram(void)
1da177e4 LT	278	{
1da177e4 LT	279	char *devname;
1da177e4 LT	280
	281	#ifndef MODULE
	282	char *devstart;
	283	char *devlength;
	284
1da177e4 LT	285	if (!map) {
	286	E("slram: not enough parameters.\n");
	287	return(-EINVAL);
	288	}
	289	while (map) {
	290	devname = devstart = devlength = NULL;
	291
	292	if (!(devname = strsep(&map, ","))) {
	293	E("slram: No devicename specified.\n");
	294	break;
	295	}
	296	T("slram: devname = %s\n", devname);
	297	if ((!map) \|\| (!(devstart = strsep(&map, ",")))) {
	298	E("slram: No devicestart specified.\n");
	299	}
	300	T("slram: devstart = %s\n", devstart);
	301	if ((!map) \|\| (!(devlength = strsep(&map, ",")))) {
	302	E("slram: No devicelength / -end specified.\n");
	303	}
	304	T("slram: devlength = %s\n", devlength);
	305	if (parse_cmdline(devname, devstart, devlength) != 0) {
	306	return(-EINVAL);
	307	}
	308	}
	309	#else
	310	int count;
ed491d20	311	int i;
e5580fbe	312
269c0ee6	313	for (count = 0; count < SLRAM_MAX_DEVICES_PARAMS && map[count];
1da177e4 LT	314	count++) {
	315	}
	316
	317	if ((count % 3 != 0) \|\| (count == 0)) {
	318	E("slram: not enough parameters.\n");
	319	return(-EINVAL);
	320	}
	321	for (i = 0; i < (count / 3); i++) {
	322	devname = map[i * 3];
	323
	324	if (parse_cmdline(devname, map[i * 3 + 1], map[i * 3 + 2])!=0) {
	325	return(-EINVAL);
	326	}
e5580fbe	327
1da177e4 LT	328	}
1da177e4 LT	329	#endif /* !MODULE */
e5580fbe	330
1da177e4 LT	331	return(0);
	332	}
	333
	334	static void __exit cleanup_slram(void)
	335	{
	336	unregister_devices();
	337	}
	338
	339	module_init(init_slram);
	340	module_exit(cleanup_slram);
	341
	342	MODULE_LICENSE("GPL");
	343	MODULE_AUTHOR("Jochen Schaeuble <psionic@psionic.de>");
	344	MODULE_DESCRIPTION("MTD driver for uncached system RAM");