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Diffstat (limited to 'arch/mips/include/asm/bitops.h')
-rw-r--r--arch/mips/include/asm/bitops.h270
1 files changed, 121 insertions, 149 deletions
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index b0ce7ca2851f..50b4ef288c53 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -73,30 +73,26 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
: "ir" (1UL << bit), "m" (*m));
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(bit)) {
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # set_bit \n"
- " " __INS "%0, %4, %2, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (bit), "m" (*m), "r" (~0));
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # set_bit \n"
+ " " __INS "%0, %3, %2, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (bit), "r" (~0));
+ } while (unlikely(!temp));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (kernel_uses_llsc) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # set_bit \n"
- " or %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # set_bit \n"
+ " or %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -134,34 +130,30 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
" " __SC "%0, %1 \n"
" beqzl %0, 1b \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (~(1UL << bit)), "m" (*m));
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (~(1UL << bit)));
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(bit)) {
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # clear_bit \n"
- " " __INS "%0, $0, %2, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # clear_bit \n"
+ " " __INS "%0, $0, %2, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (bit));
+ } while (unlikely(!temp));
#endif /* CONFIG_CPU_MIPSR2 */
} else if (kernel_uses_llsc) {
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # clear_bit \n"
- " and %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (~(1UL << bit)), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # clear_bit \n"
+ " and %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (~(1UL << bit)));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -213,24 +205,22 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
" " __SC "%0, %1 \n"
" beqzl %0, 1b \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: " __LL "%0, %1 # change_bit \n"
- " xor %0, %2 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- " .set mips0 \n"
- : "=&r" (temp), "=m" (*m)
- : "ir" (1UL << bit), "m" (*m));
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # change_bit \n"
+ " xor %0, %2 \n"
+ " " __SC "%0, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m)
+ : "ir" (1UL << bit));
+ } while (unlikely(!temp));
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -272,30 +262,26 @@ static inline int test_and_set_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_set_bit \n"
- " or %2, %0, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_set_bit \n"
+ " or %2, %0, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -340,30 +326,26 @@ static inline int test_and_set_bit_lock(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_set_bit \n"
- " or %2, %0, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_set_bit \n"
+ " or %2, %0, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -410,49 +392,43 @@ static inline int test_and_clear_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
#ifdef CONFIG_CPU_MIPSR2
} else if (kernel_uses_llsc && __builtin_constant_p(nr)) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- "1: " __LL "%0, %1 # test_and_clear_bit \n"
- " " __EXT "%2, %0, %3, 1 \n"
- " " __INS "%0, $0, %3, 1 \n"
- " " __SC "%0, %1 \n"
- " beqz %0, 2f \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " .previous \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "ir" (bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " " __LL "%0, %1 # test_and_clear_bit \n"
+ " " __EXT "%2, %0, %3, 1 \n"
+ " " __INS "%0, $0, %3, 1 \n"
+ " " __SC "%0, %1 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "ir" (bit)
+ : "memory");
+ } while (unlikely(!temp));
#endif
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_clear_bit \n"
- " or %2, %0, %3 \n"
- " xor %2, %3 \n"
- " " __SC "%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_clear_bit \n"
+ " or %2, %0, %3 \n"
+ " xor %2, %3 \n"
+ " " __SC "%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
@@ -499,30 +475,26 @@ static inline int test_and_change_bit(unsigned long nr,
" beqzl %2, 1b \n"
" and %2, %0, %3 \n"
" .set mips0 \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
: "memory");
} else if (kernel_uses_llsc) {
unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG);
unsigned long temp;
- __asm__ __volatile__(
- " .set push \n"
- " .set noreorder \n"
- " .set mips3 \n"
- "1: " __LL "%0, %1 # test_and_change_bit \n"
- " xor %2, %0, %3 \n"
- " " __SC "\t%2, %1 \n"
- " beqz %2, 2f \n"
- " and %2, %0, %3 \n"
- " .subsection 2 \n"
- "2: b 1b \n"
- " nop \n"
- " .previous \n"
- " .set pop \n"
- : "=&r" (temp), "=m" (*m), "=&r" (res)
- : "r" (1UL << bit), "m" (*m)
- : "memory");
+ do {
+ __asm__ __volatile__(
+ " .set mips3 \n"
+ " " __LL "%0, %1 # test_and_change_bit \n"
+ " xor %2, %0, %3 \n"
+ " " __SC "\t%2, %1 \n"
+ " .set mips0 \n"
+ : "=&r" (temp), "+m" (*m), "=&r" (res)
+ : "r" (1UL << bit)
+ : "memory");
+ } while (unlikely(!res));
+
+ res = temp & (1UL << bit);
} else {
volatile unsigned long *a = addr;
unsigned long mask;
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