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Diffstat (limited to 'arch/mips/include/asm/bitops.h')
-rw-r--r--arch/mips/include/asm/bitops.h185
1 files changed, 63 insertions, 122 deletions
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index 50b4ef288c5..7c8816f7b7c 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -14,10 +14,8 @@
#endif
#include <linux/compiler.h>
-#include <linux/irqflags.h>
#include <linux/types.h>
#include <asm/barrier.h>
-#include <asm/bug.h>
#include <asm/byteorder.h> /* sigh ... */
#include <asm/cpu-features.h>
#include <asm/sgidefs.h>
@@ -28,22 +26,33 @@
#define SZLONG_MASK 31UL
#define __LL "ll "
#define __SC "sc "
-#define __INS "ins "
-#define __EXT "ext "
+#define __INS "ins "
+#define __EXT "ext "
#elif _MIPS_SZLONG == 64
#define SZLONG_LOG 6
#define SZLONG_MASK 63UL
#define __LL "lld "
#define __SC "scd "
-#define __INS "dins "
-#define __EXT "dext "
+#define __INS "dins "
+#define __EXT "dext "
#endif
/*
- * clear_bit() doesn't provide any barrier for the compiler.
+ * These are the "slower" versions of the functions and are in bitops.c.
+ * These functions call raw_local_irq_{save,restore}().
*/
-#define smp_mb__before_clear_bit() smp_mb__before_llsc()
-#define smp_mb__after_clear_bit() smp_llsc_mb()
+void __mips_set_bit(unsigned long nr, volatile unsigned long *addr);
+void __mips_clear_bit(unsigned long nr, volatile unsigned long *addr);
+void __mips_change_bit(unsigned long nr, volatile unsigned long *addr);
+int __mips_test_and_set_bit(unsigned long nr,
+ volatile unsigned long *addr);
+int __mips_test_and_set_bit_lock(unsigned long nr,
+ volatile unsigned long *addr);
+int __mips_test_and_clear_bit(unsigned long nr,
+ volatile unsigned long *addr);
+int __mips_test_and_change_bit(unsigned long nr,
+ volatile unsigned long *addr);
+
/*
* set_bit - Atomically set a bit in memory
@@ -58,12 +67,12 @@
static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long temp;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # set_bit \n"
" or %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -85,7 +94,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
} else if (kernel_uses_llsc) {
do {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
" " __LL "%0, %1 # set_bit \n"
" or %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -93,17 +102,8 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
: "=&r" (temp), "+m" (*m)
: "ir" (1UL << bit));
} while (unlikely(!temp));
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- *a |= mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ __mips_set_bit(nr, addr);
}
/*
@@ -113,18 +113,18 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
*
* clear_bit() is atomic and may not be reordered. However, it does
* not contain a memory barrier, so if it is used for locking purposes,
- * you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit()
+ * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
* in order to ensure changes are visible on other processors.
*/
static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
{
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long temp;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # clear_bit \n"
" and %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -146,7 +146,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
} else if (kernel_uses_llsc) {
do {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
" " __LL "%0, %1 # clear_bit \n"
" and %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -154,17 +154,8 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
: "=&r" (temp), "+m" (*m)
: "ir" (~(1UL << bit)));
} while (unlikely(!temp));
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- *a &= ~mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ __mips_clear_bit(nr, addr);
}
/*
@@ -177,7 +168,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
*/
static inline void clear_bit_unlock(unsigned long nr, volatile unsigned long *addr)
{
- smp_mb__before_clear_bit();
+ smp_mb__before_atomic();
clear_bit(nr, addr);
}
@@ -192,14 +183,14 @@ static inline void clear_bit_unlock(unsigned long nr, volatile unsigned long *ad
*/
static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
{
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # change_bit \n"
" xor %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -213,7 +204,7 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
do {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
" " __LL "%0, %1 # change_bit \n"
" xor %0, %2 \n"
" " __SC "%0, %1 \n"
@@ -221,17 +212,8 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
: "=&r" (temp), "+m" (*m)
: "ir" (1UL << bit));
} while (unlikely(!temp));
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- *a ^= mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ __mips_change_bit(nr, addr);
}
/*
@@ -245,7 +227,7 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
static inline int test_and_set_bit(unsigned long nr,
volatile unsigned long *addr)
{
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long res;
smp_mb__before_llsc();
@@ -255,7 +237,7 @@ static inline int test_and_set_bit(unsigned long nr,
unsigned long temp;
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # test_and_set_bit \n"
" or %2, %0, %3 \n"
" " __SC "%2, %1 \n"
@@ -271,7 +253,7 @@ static inline int test_and_set_bit(unsigned long nr,
do {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
" " __LL "%0, %1 # test_and_set_bit \n"
" or %2, %0, %3 \n"
" " __SC "%2, %1 \n"
@@ -282,18 +264,8 @@ static inline int test_and_set_bit(unsigned long nr,
} while (unlikely(!res));
res = temp & (1UL << bit);
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- res = (mask & *a);
- *a |= mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ res = __mips_test_and_set_bit(nr, addr);
smp_llsc_mb();
@@ -311,7 +283,7 @@ static inline int test_and_set_bit(unsigned long nr,
static inline int test_and_set_bit_lock(unsigned long nr,
volatile unsigned long *addr)
{
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long res;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
@@ -319,7 +291,7 @@ static inline int test_and_set_bit_lock(unsigned long nr,
unsigned long temp;
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # test_and_set_bit \n"
" or %2, %0, %3 \n"
" " __SC "%2, %1 \n"
@@ -335,7 +307,7 @@ static inline int test_and_set_bit_lock(unsigned long nr,
do {
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
" " __LL "%0, %1 # test_and_set_bit \n"
" or %2, %0, %3 \n"
" " __SC "%2, %1 \n"
@@ -346,18 +318,8 @@ static inline int test_and_set_bit_lock(unsigned long nr,
} while (unlikely(!res));
res = temp & (1UL << bit);
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- res = (mask & *a);
- *a |= mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ res = __mips_test_and_set_bit_lock(nr, addr);
smp_llsc_mb();
@@ -374,7 +336,7 @@ static inline int test_and_set_bit_lock(unsigned long nr,
static inline int test_and_clear_bit(unsigned long nr,
volatile unsigned long *addr)
{
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long res;
smp_mb__before_llsc();
@@ -384,11 +346,11 @@ static inline int test_and_clear_bit(unsigned long nr,
unsigned long temp;
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # test_and_clear_bit \n"
" or %2, %0, %3 \n"
" xor %2, %3 \n"
- " " __SC "%2, %1 \n"
+ " " __SC "%2, %1 \n"
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
@@ -402,10 +364,10 @@ static inline int test_and_clear_bit(unsigned long nr,
do {
__asm__ __volatile__(
- " " __LL "%0, %1 # test_and_clear_bit \n"
+ " " __LL "%0, %1 # test_and_clear_bit \n"
" " __EXT "%2, %0, %3, 1 \n"
- " " __INS "%0, $0, %3, 1 \n"
- " " __SC "%0, %1 \n"
+ " " __INS "%0, $0, %3, 1 \n"
+ " " __SC "%0, %1 \n"
: "=&r" (temp), "+m" (*m), "=&r" (res)
: "ir" (bit)
: "memory");
@@ -417,11 +379,11 @@ static inline int test_and_clear_bit(unsigned long nr,
do {
__asm__ __volatile__(
- " .set mips3 \n"
- " " __LL "%0, %1 # test_and_clear_bit \n"
+ " .set arch=r4000 \n"
+ " " __LL "%0, %1 # test_and_clear_bit \n"
" or %2, %0, %3 \n"
" xor %2, %3 \n"
- " " __SC "%2, %1 \n"
+ " " __SC "%2, %1 \n"
" .set mips0 \n"
: "=&r" (temp), "+m" (*m), "=&r" (res)
: "r" (1UL << bit)
@@ -429,18 +391,8 @@ static inline int test_and_clear_bit(unsigned long nr,
} while (unlikely(!res));
res = temp & (1UL << bit);
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- res = (mask & *a);
- *a &= ~mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ res = __mips_test_and_clear_bit(nr, addr);
smp_llsc_mb();
@@ -458,7 +410,7 @@ static inline int test_and_clear_bit(unsigned long nr,
static inline int test_and_change_bit(unsigned long nr,
volatile unsigned long *addr)
{
- unsigned short bit = nr & SZLONG_MASK;
+ int bit = nr & SZLONG_MASK;
unsigned long res;
smp_mb__before_llsc();
@@ -468,7 +420,7 @@ static inline int test_and_change_bit(unsigned long nr,
unsigned long temp;
__asm__ __volatile__(
- " .set mips3 \n"
+ " .set arch=r4000 \n"
"1: " __LL "%0, %1 # test_and_change_bit \n"
" xor %2, %0, %3 \n"
" " __SC "%2, %1 \n"
@@ -484,8 +436,8 @@ static inline int test_and_change_bit(unsigned long nr,
do {
__asm__ __volatile__(
- " .set mips3 \n"
- " " __LL "%0, %1 # test_and_change_bit \n"
+ " .set arch=r4000 \n"
+ " " __LL "%0, %1 # test_and_change_bit \n"
" xor %2, %0, %3 \n"
" " __SC "\t%2, %1 \n"
" .set mips0 \n"
@@ -495,18 +447,8 @@ static inline int test_and_change_bit(unsigned long nr,
} while (unlikely(!res));
res = temp & (1UL << bit);
- } else {
- volatile unsigned long *a = addr;
- unsigned long mask;
- unsigned long flags;
-
- a += nr >> SZLONG_LOG;
- mask = 1UL << bit;
- raw_local_irq_save(flags);
- res = (mask & *a);
- *a ^= mask;
- raw_local_irq_restore(flags);
- }
+ } else
+ res = __mips_test_and_change_bit(nr, addr);
smp_llsc_mb();
@@ -676,9 +618,8 @@ static inline int ffs(int word)
#include <asm/arch_hweight.h>
#include <asm-generic/bitops/const_hweight.h>
-#include <asm-generic/bitops/ext2-non-atomic.h>
+#include <asm-generic/bitops/le.h>
#include <asm-generic/bitops/ext2-atomic.h>
-#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 07:48:50 +0000