openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[MTD][NOR] Add physical address to point() method 

Adding the ability to get a physical address from point() in addition
to virtual address.  This physical address is required for XIP of
userspace code from flash.

Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Reviewed-by: Jörn Engel <joern@logfs.org>
Acked-by: Nicolas Pitre <nico@cam.org>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Jared Hulbert 2008-04-29 23:26:49 -07:00 committed by David Woodhouse
parent 27c72b040c
commit a98889f3d8
12 changed files with 77 additions and 51 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/mtd/chips/cfi_cmdset_0001.c
View File

@ -82,9 +82,8 @@ static struct mtd_info *cfi_intelext_setup (struct mtd_info *);
static int cfi_intelext_partition_fixup(struct mtd_info *, struct cfi_private **);
static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **mtdbuf);
static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from,
size_t len);
size_t *retlen, void **virt, resource_size_t *phys);
static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len);
static int chip_ready (struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
@ -1240,7 +1239,8 @@ static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t a
return ret;
}
static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf)
static int cfi_intelext_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
@ -1257,8 +1257,10 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si
chipnum = (from >> cfi->chipshift);
ofs = from - (chipnum << cfi->chipshift);
*mtdbuf = (void *)map->virt + cfi->chips[chipnum].start + ofs;
*virt = map->virt + cfi->chips[chipnum].start + ofs;
*retlen = 0;
if (phys)
*phys = map->phys + cfi->chips[chipnum].start + ofs;
while (len) {
unsigned long thislen;
@ -1291,7 +1293,7 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si
return 0;
}
static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
static void cfi_intelext_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;

11
drivers/mtd/devices/mtdram.c
View File

@ -48,18 +48,21 @@ static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
}
static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **mtdbuf)
size_t *retlen, void **virt, resource_size_t *phys)
{
if (from + len > mtd->size)
return -EINVAL;
*mtdbuf = mtd->priv + from;
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
*virt = mtd->priv + from;
*retlen = len;
return 0;
}
static void ram_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
size_t len)
static void ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}

13
drivers/mtd/devices/phram.c
View File

@ -57,20 +57,21 @@ static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
}
static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **mtdbuf)
size_t *retlen, void **virt, resource_size_t *phys)
{
u_char *start = mtd->priv;
if (from + len > mtd->size)
return -EINVAL;
*mtdbuf = start + from;
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
*virt = mtd->priv + from;
*retlen = len;
return 0;
}
static void phram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from,
size_t len)
static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}

27
drivers/mtd/devices/pmc551.c
View File

@ -134,7 +134,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
eoff_lo = end & (priv->asize - 1);
soff_lo = instr->addr & (priv->asize - 1);
pmc551_point(mtd, instr->addr, instr->len, &retlen, &ptr);
pmc551_point(mtd, instr->addr, instr->len, &retlen,
(void **)&ptr, NULL);
if (soff_hi == eoff_hi || mtd->size == priv->asize) {
/* The whole thing fits within one access, so just one shot
@ -154,7 +155,8 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
}
soff_hi += priv->asize;
pmc551_point(mtd, (priv->base_map0 | soff_hi),
priv->asize, &retlen, &ptr);
priv->asize, &retlen,
(void **)&ptr, NULL);
}
memset(ptr, 0xff, eoff_lo);
}
@ -170,7 +172,7 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
}
static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t * retlen, u_char ** mtdbuf)
size_t *retlen, void **virt, resource_size_t *phys)
{
struct mypriv *priv = mtd->priv;
u32 soff_hi;
@ -188,6 +190,10 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
return -EINVAL;
}
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
soff_hi = from & ~(priv->asize - 1);
soff_lo = from & (priv->asize - 1);
@ -198,13 +204,12 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
priv->curr_map0 = soff_hi;
}
*mtdbuf = priv->start + soff_lo;
*virt = priv->start + soff_lo;
*retlen = len;
return 0;
}
static void pmc551_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
size_t len)
static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
#ifdef CONFIG_MTD_PMC551_DEBUG
printk(KERN_DEBUG "pmc551_unpoint()\n");
@ -242,7 +247,7 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
soff_lo = from & (priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
pmc551_point(mtd, from, len, retlen, &ptr);
pmc551_point(mtd, from, len, retlen, (void **)&ptr, NULL);
if (soff_hi == eoff_hi) {
/* The whole thing fits within one access, so just one shot
@ -263,7 +268,8 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
goto out;
}
soff_hi += priv->asize;
pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
pmc551_point(mtd, soff_hi, priv->asize, retlen,
(void **)&ptr, NULL);
}
memcpy(copyto, ptr, eoff_lo);
copyto += eoff_lo;
@ -308,7 +314,7 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
soff_lo = to & (priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
pmc551_point(mtd, to, len, retlen, &ptr);
pmc551_point(mtd, to, len, retlen, (void **)&ptr, NULL);
if (soff_hi == eoff_hi) {
/* The whole thing fits within one access, so just one shot
@ -329,7 +335,8 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
goto out;
}
soff_hi += priv->asize;
pmc551_point(mtd, soff_hi, priv->asize, retlen, &ptr);
pmc551_point(mtd, soff_hi, priv->asize, retlen,
(void **)&ptr, NULL);
}
memcpy(ptr, copyfrom, eoff_lo);
copyfrom += eoff_lo;

15
drivers/mtd/devices/slram.c
View File

@ -76,8 +76,9 @@ static char *map;
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 *, u_char **);
static void slram_unpoint(struct mtd_info *, u_char *, loff_t, size_t);
static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, void **,
resource_size_t *);
static void 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 *);
@ -104,19 +105,23 @@ static int slram_erase(struct mtd_info *mtd, struct erase_info *instr)
}
static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **mtdbuf)
size_t *retlen, void **virt, resource_size_t *phys)
{
slram_priv_t *priv = mtd->priv;
/* can we return a physical address with this driver? */
if (phys)
return -EINVAL;
if (from + len > mtd->size)
return -EINVAL;
*mtdbuf = priv->start + from;
*virt = priv->start + from;
*retlen = len;
return(0);
}
static void slram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
static void slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
}

6
drivers/mtd/maps/uclinux.c
View File

@ -40,10 +40,12 @@ struct mtd_partition uclinux_romfs[] = {
/****************************************************************************/
int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **mtdbuf)
size_t *retlen, void **virt, resource_size_t *phys)
{
struct map_info *map = mtd->priv;
*mtdbuf = (u_char *) (map->virt + ((int) from));
*virt = map->virt + from;
if (phys)
*phys = map->phys + from;
*retlen = len;
return(0);
}

8
drivers/mtd/mtdpart.c
View File

@ -68,7 +68,7 @@ static int part_read (struct mtd_info *mtd, loff_t from, size_t len,
}
static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char **buf)
size_t *retlen, void **virt, resource_size_t *phys)
{
struct mtd_part *part = PART(mtd);
if (from >= mtd->size)
@ -76,14 +76,14 @@ static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
else if (from + len > mtd->size)
len = mtd->size - from;
return part->master->point (part->master, from + part->offset,
len, retlen, buf);
len, retlen, virt, phys);
}
static void part_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
struct mtd_part *part = PART(mtd);
part->master->unpoint (part->master, addr, from + part->offset, len);
part->master->unpoint(part->master, from + part->offset, len);
}
static int part_read_oob(struct mtd_info *mtd, loff_t from,

7
fs/jffs2/erase.c
View File

@ -332,7 +332,8 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
if (c->mtd->point) {
unsigned long *wordebuf;
ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size, &retlen, (unsigned char **)&ebuf);
ret = c->mtd->point(c->mtd, jeb->offset, c->sector_size,
&retlen, &ebuf, NULL);
if (ret) {
D1(printk(KERN_DEBUG "MTD point failed %d\n", ret));
goto do_flash_read;
@ -340,7 +341,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
if (retlen < c->sector_size) {
/* Don't muck about if it won't let us point to the whole erase sector */
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", retlen));
c->mtd->unpoint(c->mtd, ebuf, jeb->offset, retlen);
c->mtd->unpoint(c->mtd, jeb->offset, retlen);
goto do_flash_read;
}
wordebuf = ebuf-sizeof(*wordebuf);
@ -349,7 +350,7 @@ static int jffs2_block_check_erase(struct jffs2_sb_info *c, struct jffs2_erasebl
if (*++wordebuf != ~0)
break;
} while(--retlen);
c->mtd->unpoint(c->mtd, ebuf, jeb->offset, c->sector_size);
c->mtd->unpoint(c->mtd, jeb->offset, c->sector_size);
if (retlen) {
printk(KERN_WARNING "Newly-erased block contained word 0x%lx at offset 0x%08tx\n",
*wordebuf, jeb->offset + c->sector_size-retlen*sizeof(*wordebuf));

9
fs/jffs2/readinode.c
View File

@ -63,10 +63,11 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
/* TODO: instead, incapsulate point() stuff to jffs2_flash_read(),
* adding and jffs2_flash_read_end() interface. */
if (c->mtd->point) {
err = c->mtd->point(c->mtd, ofs, len, &retlen, &buffer);
err = c->mtd->point(c->mtd, ofs, len, &retlen,
(void **)&buffer, NULL);
if (!err && retlen < len) {
JFFS2_WARNING("MTD point returned len too short: %zu instead of %u.\n", retlen, tn->csize);
c->mtd->unpoint(c->mtd, buffer, ofs, retlen);
c->mtd->unpoint(c->mtd, ofs, retlen);
} else if (err)
JFFS2_WARNING("MTD point failed: error code %d.\n", err);
else
@ -100,7 +101,7 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
kfree(buffer);
#ifndef __ECOS
else
c->mtd->unpoint(c->mtd, buffer, ofs, len);
c->mtd->unpoint(c->mtd, ofs, len);
#endif
if (crc != tn->data_crc) {
@ -136,7 +137,7 @@ static int check_node_data(struct jffs2_sb_info *c, struct jffs2_tmp_dnode_info
kfree(buffer);
#ifndef __ECOS
else
c->mtd->unpoint(c->mtd, buffer, ofs, len);
c->mtd->unpoint(c->mtd, ofs, len);
#endif
return err;
}

7
fs/jffs2/scan.c
View File

@ -97,11 +97,12 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
size_t pointlen;
if (c->mtd->point) {
ret = c->mtd->point (c->mtd, 0, c->mtd->size, &pointlen, &flashbuf);
ret = c->mtd->point(c->mtd, 0, c->mtd->size, &pointlen,
(void **)&flashbuf, NULL);
if (!ret && pointlen < c->mtd->size) {
/* Don't muck about if it won't let us point to the whole flash */
D1(printk(KERN_DEBUG "MTD point returned len too short: 0x%zx\n", pointlen));
c->mtd->unpoint(c->mtd, flashbuf, 0, pointlen);
c->mtd->unpoint(c->mtd, 0, pointlen);
flashbuf = NULL;
}
if (ret)
@ -267,7 +268,7 @@ int jffs2_scan_medium(struct jffs2_sb_info *c)
kfree(flashbuf);
#ifndef __ECOS
else
c->mtd->unpoint(c->mtd, flashbuf, 0, c->mtd->size);
c->mtd->unpoint(c->mtd, 0, c->mtd->size);
#endif
if (s)
kfree(s);

6
include/linux/mtd/mtd.h
View File

@ -143,10 +143,12 @@ struct mtd_info {
int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
/* This stuff for eXecute-In-Place */
int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
/* phys is optional and may be set to NULL */
int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from, size_t len);
void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);

5
include/linux/mtd/pmc551.h
View File

@ -36,8 +36,9 @@ struct mypriv {
* Function Prototypes
*/
static int pmc551_erase(struct mtd_info *, struct erase_info *);
static void pmc551_unpoint(struct mtd_info *, u_char *, loff_t, size_t);
static int pmc551_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
static void pmc551_unpoint(struct mtd_info *, loff_t, size_t);
static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
static int pmc551_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int pmc551_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);