mtd: cfi: deinline large functions
With this .config: http://busybox.net/~vda/kernel_config, after uninlining these functions have sizes and callsite counts as follows: cfi_udelay(): 74 bytes, 26 callsites cfi_send_gen_cmd(): 153 bytes, 95 callsites cfi_build_cmd(): 274 bytes, 123 callsites cfi_build_cmd_addr(): 49 bytes, 15 callsites cfi_merge_status(): 230 bytes, 3 callsites Reduction in code size is about 50,000: text data bss dec hex filename 85842882 22294584 20627456 128764922 7accbfa vmlinux.before 85789648 22294616 20627456 128711720 7abfc28 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Dan Carpenter <dan.carpenter@oracle.com> CC: Jingoo Han <jg1.han@samsung.com> CC: Brian Norris <computersforpeace@gmail.com> CC: Aaron Sierra <asierra@xes-inc.com> CC: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> CC: David Woodhouse <David.Woodhouse@intel.com> CC: linux-mtd@lists.infradead.org CC: linux-kernel@vger.kernel.org Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Denys Vlasenko
Brian Norris
Родитель
c3c263a8a3
Коммит
4612c715a6
|
|
@ -23,6 +23,194 @@
|
|||
#include <linux/mtd/map.h>
|
||||
#include <linux/mtd/cfi.h>
|
||||
|
||||
void cfi_udelay(int us)
|
||||
{
|
||||
if (us >= 1000) {
|
||||
msleep((us+999)/1000);
|
||||
} else {
|
||||
udelay(us);
|
||||
cond_resched();
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(cfi_udelay);
|
||||
|
||||
/*
|
||||
* Returns the command address according to the given geometry.
|
||||
*/
|
||||
uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
|
||||
struct map_info *map, struct cfi_private *cfi)
|
||||
{
|
||||
unsigned bankwidth = map_bankwidth(map);
|
||||
unsigned interleave = cfi_interleave(cfi);
|
||||
unsigned type = cfi->device_type;
|
||||
uint32_t addr;
|
||||
|
||||
addr = (cmd_ofs * type) * interleave;
|
||||
|
||||
/* Modify the unlock address if we are in compatibility mode.
|
||||
* For 16bit devices on 8 bit busses
|
||||
* and 32bit devices on 16 bit busses
|
||||
* set the low bit of the alternating bit sequence of the address.
|
||||
*/
|
||||
if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
|
||||
addr |= (type >> 1)*interleave;
|
||||
|
||||
return addr;
|
||||
}
|
||||
EXPORT_SYMBOL(cfi_build_cmd_addr);
|
||||
|
||||
/*
|
||||
* Transforms the CFI command for the given geometry (bus width & interleave).
|
||||
* It looks too long to be inline, but in the common case it should almost all
|
||||
* get optimised away.
|
||||
*/
|
||||
map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
|
||||
{
|
||||
map_word val = { {0} };
|
||||
int wordwidth, words_per_bus, chip_mode, chips_per_word;
|
||||
unsigned long onecmd;
|
||||
int i;
|
||||
|
||||
/* We do it this way to give the compiler a fighting chance
|
||||
of optimising away all the crap for 'bankwidth' larger than
|
||||
an unsigned long, in the common case where that support is
|
||||
disabled */
|
||||
if (map_bankwidth_is_large(map)) {
|
||||
wordwidth = sizeof(unsigned long);
|
||||
words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
|
||||
} else {
|
||||
wordwidth = map_bankwidth(map);
|
||||
words_per_bus = 1;
|
||||
}
|
||||
|
||||
chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
|
||||
chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
|
||||
|
||||
/* First, determine what the bit-pattern should be for a single
|
||||
device, according to chip mode and endianness... */
|
||||
switch (chip_mode) {
|
||||
default: BUG();
|
||||
case 1:
|
||||
onecmd = cmd;
|
||||
break;
|
||||
case 2:
|
||||
onecmd = cpu_to_cfi16(map, cmd);
|
||||
break;
|
||||
case 4:
|
||||
onecmd = cpu_to_cfi32(map, cmd);
|
||||
break;
|
||||
}
|
||||
|
||||
/* Now replicate it across the size of an unsigned long, or
|
||||
just to the bus width as appropriate */
|
||||
switch (chips_per_word) {
|
||||
default: BUG();
|
||||
#if BITS_PER_LONG >= 64
|
||||
case 8:
|
||||
onecmd |= (onecmd << (chip_mode * 32));
|
||||
#endif
|
||||
case 4:
|
||||
onecmd |= (onecmd << (chip_mode * 16));
|
||||
case 2:
|
||||
onecmd |= (onecmd << (chip_mode * 8));
|
||||
case 1:
|
||||
;
|
||||
}
|
||||
|
||||
/* And finally, for the multi-word case, replicate it
|
||||
in all words in the structure */
|
||||
for (i=0; i < words_per_bus; i++) {
|
||||
val.x[i] = onecmd;
|
||||
}
|
||||
|
||||
return val;
|
||||
}
|
||||
EXPORT_SYMBOL(cfi_build_cmd);
|
||||
|
||||
unsigned long cfi_merge_status(map_word val, struct map_info *map,
|
||||
struct cfi_private *cfi)
|
||||
{
|
||||
int wordwidth, words_per_bus, chip_mode, chips_per_word;
|
||||
unsigned long onestat, res = 0;
|
||||
int i;
|
||||
|
||||
/* We do it this way to give the compiler a fighting chance
|
||||
of optimising away all the crap for 'bankwidth' larger than
|
||||
an unsigned long, in the common case where that support is
|
||||
disabled */
|
||||
if (map_bankwidth_is_large(map)) {
|
||||
wordwidth = sizeof(unsigned long);
|
||||
words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
|
||||
} else {
|
||||
wordwidth = map_bankwidth(map);
|
||||
words_per_bus = 1;
|
||||
}
|
||||
|
||||
chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
|
||||
chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
|
||||
|
||||
onestat = val.x[0];
|
||||
/* Or all status words together */
|
||||
for (i=1; i < words_per_bus; i++) {
|
||||
onestat |= val.x[i];
|
||||
}
|
||||
|
||||
res = onestat;
|
||||
switch(chips_per_word) {
|
||||
default: BUG();
|
||||
#if BITS_PER_LONG >= 64
|
||||
case 8:
|
||||
res |= (onestat >> (chip_mode * 32));
|
||||
#endif
|
||||
case 4:
|
||||
res |= (onestat >> (chip_mode * 16));
|
||||
case 2:
|
||||
res |= (onestat >> (chip_mode * 8));
|
||||
case 1:
|
||||
;
|
||||
}
|
||||
|
||||
/* Last, determine what the bit-pattern should be for a single
|
||||
device, according to chip mode and endianness... */
|
||||
switch (chip_mode) {
|
||||
case 1:
|
||||
break;
|
||||
case 2:
|
||||
res = cfi16_to_cpu(map, res);
|
||||
break;
|
||||
case 4:
|
||||
res = cfi32_to_cpu(map, res);
|
||||
break;
|
||||
default: BUG();
|
||||
}
|
||||
return res;
|
||||
}
|
||||
EXPORT_SYMBOL(cfi_merge_status);
|
||||
|
||||
/*
|
||||
* Sends a CFI command to a bank of flash for the given geometry.
|
||||
*
|
||||
* Returns the offset in flash where the command was written.
|
||||
* If prev_val is non-null, it will be set to the value at the command address,
|
||||
* before the command was written.
|
||||
*/
|
||||
uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
|
||||
struct map_info *map, struct cfi_private *cfi,
|
||||
int type, map_word *prev_val)
|
||||
{
|
||||
map_word val;
|
||||
uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
|
||||
val = cfi_build_cmd(cmd, map, cfi);
|
||||
|
||||
if (prev_val)
|
||||
*prev_val = map_read(map, addr);
|
||||
|
||||
map_write(map, val, addr);
|
||||
|
||||
return addr - base;
|
||||
}
|
||||
EXPORT_SYMBOL(cfi_send_gen_cmd);
|
||||
|
||||
int __xipram cfi_qry_present(struct map_info *map, __u32 base,
|
||||
struct cfi_private *cfi)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -296,183 +296,19 @@ struct cfi_private {
|
|||
struct flchip chips[0]; /* per-chip data structure for each chip */
|
||||
};
|
||||
|
||||
/*
|
||||
* Returns the command address according to the given geometry.
|
||||
*/
|
||||
static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
|
||||
struct map_info *map, struct cfi_private *cfi)
|
||||
{
|
||||
unsigned bankwidth = map_bankwidth(map);
|
||||
unsigned interleave = cfi_interleave(cfi);
|
||||
unsigned type = cfi->device_type;
|
||||
uint32_t addr;
|
||||
|
||||
addr = (cmd_ofs * type) * interleave;
|
||||
uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
|
||||
struct map_info *map, struct cfi_private *cfi);
|
||||
|
||||
/* Modify the unlock address if we are in compatibility mode.
|
||||
* For 16bit devices on 8 bit busses
|
||||
* and 32bit devices on 16 bit busses
|
||||
* set the low bit of the alternating bit sequence of the address.
|
||||
*/
|
||||
if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
|
||||
addr |= (type >> 1)*interleave;
|
||||
|
||||
return addr;
|
||||
}
|
||||
|
||||
/*
|
||||
* Transforms the CFI command for the given geometry (bus width & interleave).
|
||||
* It looks too long to be inline, but in the common case it should almost all
|
||||
* get optimised away.
|
||||
*/
|
||||
static inline map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
|
||||
{
|
||||
map_word val = { {0} };
|
||||
int wordwidth, words_per_bus, chip_mode, chips_per_word;
|
||||
unsigned long onecmd;
|
||||
int i;
|
||||
|
||||
/* We do it this way to give the compiler a fighting chance
|
||||
of optimising away all the crap for 'bankwidth' larger than
|
||||
an unsigned long, in the common case where that support is
|
||||
disabled */
|
||||
if (map_bankwidth_is_large(map)) {
|
||||
wordwidth = sizeof(unsigned long);
|
||||
words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
|
||||
} else {
|
||||
wordwidth = map_bankwidth(map);
|
||||
words_per_bus = 1;
|
||||
}
|
||||
|
||||
chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
|
||||
chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
|
||||
|
||||
/* First, determine what the bit-pattern should be for a single
|
||||
device, according to chip mode and endianness... */
|
||||
switch (chip_mode) {
|
||||
default: BUG();
|
||||
case 1:
|
||||
onecmd = cmd;
|
||||
break;
|
||||
case 2:
|
||||
onecmd = cpu_to_cfi16(map, cmd);
|
||||
break;
|
||||
case 4:
|
||||
onecmd = cpu_to_cfi32(map, cmd);
|
||||
break;
|
||||
}
|
||||
|
||||
/* Now replicate it across the size of an unsigned long, or
|
||||
just to the bus width as appropriate */
|
||||
switch (chips_per_word) {
|
||||
default: BUG();
|
||||
#if BITS_PER_LONG >= 64
|
||||
case 8:
|
||||
onecmd |= (onecmd << (chip_mode * 32));
|
||||
#endif
|
||||
case 4:
|
||||
onecmd |= (onecmd << (chip_mode * 16));
|
||||
case 2:
|
||||
onecmd |= (onecmd << (chip_mode * 8));
|
||||
case 1:
|
||||
;
|
||||
}
|
||||
|
||||
/* And finally, for the multi-word case, replicate it
|
||||
in all words in the structure */
|
||||
for (i=0; i < words_per_bus; i++) {
|
||||
val.x[i] = onecmd;
|
||||
}
|
||||
|
||||
return val;
|
||||
}
|
||||
map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi);
|
||||
#define CMD(x) cfi_build_cmd((x), map, cfi)
|
||||
|
||||
|
||||
static inline unsigned long cfi_merge_status(map_word val, struct map_info *map,
|
||||
struct cfi_private *cfi)
|
||||
{
|
||||
int wordwidth, words_per_bus, chip_mode, chips_per_word;
|
||||
unsigned long onestat, res = 0;
|
||||
int i;
|
||||
|
||||
/* We do it this way to give the compiler a fighting chance
|
||||
of optimising away all the crap for 'bankwidth' larger than
|
||||
an unsigned long, in the common case where that support is
|
||||
disabled */
|
||||
if (map_bankwidth_is_large(map)) {
|
||||
wordwidth = sizeof(unsigned long);
|
||||
words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
|
||||
} else {
|
||||
wordwidth = map_bankwidth(map);
|
||||
words_per_bus = 1;
|
||||
}
|
||||
|
||||
chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
|
||||
chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
|
||||
|
||||
onestat = val.x[0];
|
||||
/* Or all status words together */
|
||||
for (i=1; i < words_per_bus; i++) {
|
||||
onestat |= val.x[i];
|
||||
}
|
||||
|
||||
res = onestat;
|
||||
switch(chips_per_word) {
|
||||
default: BUG();
|
||||
#if BITS_PER_LONG >= 64
|
||||
case 8:
|
||||
res |= (onestat >> (chip_mode * 32));
|
||||
#endif
|
||||
case 4:
|
||||
res |= (onestat >> (chip_mode * 16));
|
||||
case 2:
|
||||
res |= (onestat >> (chip_mode * 8));
|
||||
case 1:
|
||||
;
|
||||
}
|
||||
|
||||
/* Last, determine what the bit-pattern should be for a single
|
||||
device, according to chip mode and endianness... */
|
||||
switch (chip_mode) {
|
||||
case 1:
|
||||
break;
|
||||
case 2:
|
||||
res = cfi16_to_cpu(map, res);
|
||||
break;
|
||||
case 4:
|
||||
res = cfi32_to_cpu(map, res);
|
||||
break;
|
||||
default: BUG();
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
unsigned long cfi_merge_status(map_word val, struct map_info *map,
|
||||
struct cfi_private *cfi);
|
||||
#define MERGESTATUS(x) cfi_merge_status((x), map, cfi)
|
||||
|
||||
|
||||
/*
|
||||
* Sends a CFI command to a bank of flash for the given geometry.
|
||||
*
|
||||
* Returns the offset in flash where the command was written.
|
||||
* If prev_val is non-null, it will be set to the value at the command address,
|
||||
* before the command was written.
|
||||
*/
|
||||
static inline uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
|
||||
uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
|
||||
struct map_info *map, struct cfi_private *cfi,
|
||||
int type, map_word *prev_val)
|
||||
{
|
||||
map_word val;
|
||||
uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
|
||||
val = cfi_build_cmd(cmd, map, cfi);
|
||||
|
||||
if (prev_val)
|
||||
*prev_val = map_read(map, addr);
|
||||
|
||||
map_write(map, val, addr);
|
||||
|
||||
return addr - base;
|
||||
}
|
||||
int type, map_word *prev_val);
|
||||
|
||||
static inline uint8_t cfi_read_query(struct map_info *map, uint32_t addr)
|
||||
{
|
||||
|
|
@ -506,15 +342,7 @@ static inline uint16_t cfi_read_query16(struct map_info *map, uint32_t addr)
|
|||
}
|
||||
}
|
||||
|
||||
static inline void cfi_udelay(int us)
|
||||
{
|
||||
if (us >= 1000) {
|
||||
msleep((us+999)/1000);
|
||||
} else {
|
||||
udelay(us);
|
||||
cond_resched();
|
||||
}
|
||||
}
|
||||
void cfi_udelay(int us);
|
||||
|
||||
int __xipram cfi_qry_present(struct map_info *map, __u32 base,
|
||||
struct cfi_private *cfi);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче