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Diffstat (limited to 'include/linux/mtd/map.h')
-rw-r--r--include/linux/mtd/map.h206
1 files changed, 101 insertions, 105 deletions
diff --git a/include/linux/mtd/map.h b/include/linux/mtd/map.h
index 4b02512e421c..75b0b2abc880 100644
--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -1,20 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org> et al.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/* Overhauled routines for dealing with different mmap regions of flash */
@@ -22,16 +8,17 @@
#ifndef __LINUX_MTD_MAP_H__
#define __LINUX_MTD_MAP_H__
-#include <linux/types.h>
-#include <linux/list.h>
-#include <linux/string.h>
#include <linux/bug.h>
-#include <linux/kernel.h>
-
-#include <asm/unaligned.h>
-#include <asm/io.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/unaligned.h>
#include <asm/barrier.h>
+struct device_node;
+struct module;
+
#ifdef CONFIG_MTD_MAP_BANK_WIDTH_1
#define map_bankwidth(map) 1
#define map_bankwidth_is_1(map) (map_bankwidth(map) == 1)
@@ -77,7 +64,7 @@
/* ensure we never evaluate anything shorted than an unsigned long
* to zero, and ensure we'll never miss the end of an comparison (bjd) */
-#define map_calc_words(map) ((map_bankwidth(map) + (sizeof(unsigned long)-1))/ sizeof(unsigned long))
+#define map_calc_words(map) ((map_bankwidth(map) + (sizeof(unsigned long)-1)) / sizeof(unsigned long))
#ifdef CONFIG_MTD_MAP_BANK_WIDTH_8
# ifdef map_bankwidth
@@ -122,18 +109,13 @@
#endif
#ifdef CONFIG_MTD_MAP_BANK_WIDTH_32
-# ifdef map_bankwidth
-# undef map_bankwidth
-# define map_bankwidth(map) ((map)->bankwidth)
-# undef map_bankwidth_is_large
-# define map_bankwidth_is_large(map) (map_bankwidth(map) > BITS_PER_LONG/8)
-# undef map_words
-# define map_words(map) map_calc_words(map)
-# else
-# define map_bankwidth(map) 32
-# define map_bankwidth_is_large(map) (1)
-# define map_words(map) map_calc_words(map)
-# endif
+/* always use indirect access for 256-bit to preserve kernel stack */
+# undef map_bankwidth
+# define map_bankwidth(map) ((map)->bankwidth)
+# undef map_bankwidth_is_large
+# define map_bankwidth_is_large(map) (map_bankwidth(map) > BITS_PER_LONG/8)
+# undef map_words
+# define map_words(map) map_calc_words(map)
#define map_bankwidth_is_32(map) (map_bankwidth(map) == 32)
#undef MAX_MAP_BANKWIDTH
#define MAX_MAP_BANKWIDTH 32
@@ -142,7 +124,9 @@
#endif
#ifndef map_bankwidth
+#ifdef CONFIG_MTD
#warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"
+#endif
static inline int map_bankwidth(void *map)
{
BUG();
@@ -181,7 +165,7 @@ static inline int map_bankwidth_supported(int w)
}
}
-#define MAX_MAP_LONGS ( ((MAX_MAP_BANKWIDTH*8) + BITS_PER_LONG - 1) / BITS_PER_LONG )
+#define MAX_MAP_LONGS (((MAX_MAP_BANKWIDTH * 8) + BITS_PER_LONG - 1) / BITS_PER_LONG)
typedef union {
unsigned long x[MAX_MAP_LONGS];
@@ -205,6 +189,7 @@ typedef union {
of living.
*/
+struct mtd_chip_driver;
struct map_info {
const char *name;
unsigned long size;
@@ -238,8 +223,11 @@ struct map_info {
If there is no cache to care about this can be set to NULL. */
void (*inval_cache)(struct map_info *, unsigned long, ssize_t);
- /* set_vpp() must handle being reentered -- enable, enable, disable
- must leave it enabled. */
+ /* This will be called with 1 as parameter when the first map user
+ * needs VPP, and called with 0 when the last user exits. The map
+ * core maintains a reference counter, and assumes that VPP is a
+ * global resource applying to all mapped flash chips on the system.
+ */
void (*set_vpp)(struct map_info *, int);
unsigned long pfow_base;
@@ -264,68 +252,73 @@ void unregister_mtd_chip_driver(struct mtd_chip_driver *);
struct mtd_info *do_map_probe(const char *name, struct map_info *map);
void map_destroy(struct mtd_info *mtd);
-#define ENABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 1); } while(0)
-#define DISABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 0); } while(0)
+#define ENABLE_VPP(map) do { if (map->set_vpp) map->set_vpp(map, 1); } while (0)
+#define DISABLE_VPP(map) do { if (map->set_vpp) map->set_vpp(map, 0); } while (0)
#define INVALIDATE_CACHED_RANGE(map, from, size) \
- do { if(map->inval_cache) map->inval_cache(map, from, size); } while(0)
-
-
-static inline int map_word_equal(struct map_info *map, map_word val1, map_word val2)
-{
- int i;
- for (i=0; i<map_words(map); i++) {
- if (val1.x[i] != val2.x[i])
- return 0;
- }
- return 1;
-}
-
-static inline map_word map_word_and(struct map_info *map, map_word val1, map_word val2)
-{
- map_word r;
- int i;
-
- for (i=0; i<map_words(map); i++) {
- r.x[i] = val1.x[i] & val2.x[i];
- }
- return r;
-}
-
-static inline map_word map_word_clr(struct map_info *map, map_word val1, map_word val2)
-{
- map_word r;
- int i;
-
- for (i=0; i<map_words(map); i++) {
- r.x[i] = val1.x[i] & ~val2.x[i];
- }
- return r;
-}
-
-static inline map_word map_word_or(struct map_info *map, map_word val1, map_word val2)
-{
- map_word r;
- int i;
-
- for (i=0; i<map_words(map); i++) {
- r.x[i] = val1.x[i] | val2.x[i];
- }
- return r;
-}
-
-#define map_word_andequal(m, a, b, z) map_word_equal(m, z, map_word_and(m, a, b))
-
-static inline int map_word_bitsset(struct map_info *map, map_word val1, map_word val2)
-{
- int i;
-
- for (i=0; i<map_words(map); i++) {
- if (val1.x[i] & val2.x[i])
- return 1;
- }
- return 0;
-}
+ do { if (map->inval_cache) map->inval_cache(map, from, size); } while (0)
+
+#define map_word_equal(map, val1, val2) \
+({ \
+ int i, ret = 1; \
+ for (i = 0; i < map_words(map); i++) \
+ if ((val1).x[i] != (val2).x[i]) { \
+ ret = 0; \
+ break; \
+ } \
+ ret; \
+})
+
+#define map_word_and(map, val1, val2) \
+({ \
+ map_word r; \
+ int i; \
+ for (i = 0; i < map_words(map); i++) \
+ r.x[i] = (val1).x[i] & (val2).x[i]; \
+ r; \
+})
+
+#define map_word_clr(map, val1, val2) \
+({ \
+ map_word r; \
+ int i; \
+ for (i = 0; i < map_words(map); i++) \
+ r.x[i] = (val1).x[i] & ~(val2).x[i]; \
+ r; \
+})
+
+#define map_word_or(map, val1, val2) \
+({ \
+ map_word r; \
+ int i; \
+ for (i = 0; i < map_words(map); i++) \
+ r.x[i] = (val1).x[i] | (val2).x[i]; \
+ r; \
+})
+
+#define map_word_andequal(map, val1, val2, val3) \
+({ \
+ int i, ret = 1; \
+ for (i = 0; i < map_words(map); i++) { \
+ if (((val1).x[i] & (val2).x[i]) != (val3).x[i]) { \
+ ret = 0; \
+ break; \
+ } \
+ } \
+ ret; \
+})
+
+#define map_word_bitsset(map, val1, val2) \
+({ \
+ int i, ret = 0; \
+ for (i = 0; i < map_words(map); i++) { \
+ if ((val1).x[i] & (val2).x[i]) { \
+ ret = 1; \
+ break; \
+ } \
+ } \
+ ret; \
+})
static inline map_word map_word_load(struct map_info *map, const void *ptr)
{
@@ -355,17 +348,19 @@ static inline map_word map_word_load_partial(struct map_info *map, map_word orig
if (map_bankwidth_is_large(map)) {
char *dest = (char *)&orig;
+
memcpy(dest+start, buf, len);
} else {
- for (i=start; i < start+len; i++) {
+ for (i = start; i < start+len; i++) {
int bitpos;
+
#ifdef __LITTLE_ENDIAN
- bitpos = i*8;
+ bitpos = i * 8;
#else /* __BIG_ENDIAN */
- bitpos = (map_bankwidth(map)-1-i)*8;
+ bitpos = (map_bankwidth(map) - 1 - i) * 8;
#endif
orig.x[0] &= ~(0xff << bitpos);
- orig.x[0] |= buf[i-start] << bitpos;
+ orig.x[0] |= (unsigned long)buf[i-start] << bitpos;
}
}
return orig;
@@ -384,9 +379,10 @@ static inline map_word map_word_ff(struct map_info *map)
if (map_bankwidth(map) < MAP_FF_LIMIT) {
int bw = 8 * map_bankwidth(map);
- r.x[0] = (1 << bw) - 1;
+
+ r.x[0] = (1UL << bw) - 1;
} else {
- for (i=0; i<map_words(map); i++)
+ for (i = 0; i < map_words(map); i++)
r.x[i] = ~0UL;
}
return r;
@@ -407,7 +403,7 @@ static inline map_word inline_map_read(struct map_info *map, unsigned long ofs)
r.x[0] = __raw_readq(map->virt + ofs);
#endif
else if (map_bankwidth_is_large(map))
- memcpy_fromio(r.x, map->virt+ofs, map->bankwidth);
+ memcpy_fromio(r.x, map->virt + ofs, map->bankwidth);
else
BUG();
generated by cgit (git 2.34.1) at 2025-12-25 04:44:19 +0000