summaryrefslogtreecommitdiffstats
path: root/arch/s390/include/asm/bitops.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/include/asm/bitops.h')
-rw-r--r--arch/s390/include/asm/bitops.h276
1 files changed, 65 insertions, 211 deletions
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index bb26481a723f..6038349c8410 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -15,6 +15,7 @@
#error only <linux/bitops.h> can be included directly
#endif
+#include <linux/typecheck.h>
#include <linux/compiler.h>
/*
@@ -54,8 +55,6 @@
*/
/* bitmap tables from arch/s390/kernel/bitmap.c */
-extern const char _oi_bitmap[];
-extern const char _ni_bitmap[];
extern const char _zb_findmap[];
extern const char _sb_findmap[];
@@ -69,15 +68,15 @@ extern const char _sb_findmap[];
({ \
unsigned long __old, __new; \
\
+ typecheck(unsigned long *, (__addr)); \
asm volatile( \
" l %0,%2\n" \
"0: lr %1,%0\n" \
__op_string " %1,%3\n" \
" cs %0,%1,%2\n" \
" jl 0b" \
- : "=&d" (__old), "=&d" (__new), \
- "=Q" (*(unsigned long *) __addr) \
- : "d" (__val), "Q" (*(unsigned long *) __addr) \
+ : "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
+ : "d" (__val) \
: "cc"); \
__old; \
})
@@ -94,9 +93,10 @@ extern const char _sb_findmap[];
({ \
unsigned long __old; \
\
+ typecheck(unsigned long *, (__addr)); \
asm volatile( \
__op_string " %0,%2,%1\n" \
- : "=d" (__old), "+Q" (*(unsigned long *)__addr) \
+ : "=d" (__old), "+Q" (*(__addr)) \
: "d" (__val) \
: "cc"); \
__old; \
@@ -112,15 +112,15 @@ extern const char _sb_findmap[];
({ \
unsigned long __old, __new; \
\
+ typecheck(unsigned long *, (__addr)); \
asm volatile( \
" lg %0,%2\n" \
"0: lgr %1,%0\n" \
__op_string " %1,%3\n" \
" csg %0,%1,%2\n" \
" jl 0b" \
- : "=&d" (__old), "=&d" (__new), \
- "=Q" (*(unsigned long *) __addr) \
- : "d" (__val), "Q" (*(unsigned long *) __addr) \
+ : "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
+ : "d" (__val) \
: "cc"); \
__old; \
})
@@ -131,294 +131,148 @@ extern const char _sb_findmap[];
#define __BITOPS_WORDS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG)
-#ifdef CONFIG_SMP
-/*
- * SMP safe set_bit routine based on compare and swap (CS)
- */
-static inline void set_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+static inline unsigned long *
+__bitops_word(unsigned long nr, volatile unsigned long *ptr)
+{
+ unsigned long addr;
+
+ addr = (unsigned long)ptr + ((nr ^ (nr & (BITS_PER_LONG - 1))) >> 3);
+ return (unsigned long *)addr;
+}
+
+static inline unsigned char *
+__bitops_byte(unsigned long nr, volatile unsigned long *ptr)
+{
+ return ((unsigned char *)ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
+}
+
+static inline void set_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make OR mask */
mask = 1UL << (nr & (BITS_PER_LONG - 1));
- /* Do the atomic update. */
__BITOPS_LOOP(addr, mask, __BITOPS_OR);
}
-/*
- * SMP safe clear_bit routine based on compare and swap (CS)
- */
-static inline void clear_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make AND mask */
mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
- /* Do the atomic update. */
__BITOPS_LOOP(addr, mask, __BITOPS_AND);
}
-/*
- * SMP safe change_bit routine based on compare and swap (CS)
- */
-static inline void change_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+static inline void change_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make XOR mask */
mask = 1UL << (nr & (BITS_PER_LONG - 1));
- /* Do the atomic update. */
__BITOPS_LOOP(addr, mask, __BITOPS_XOR);
}
-/*
- * SMP safe test_and_set_bit routine based on compare and swap (CS)
- */
static inline int
-test_and_set_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, old, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long old, mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make OR/test mask */
mask = 1UL << (nr & (BITS_PER_LONG - 1));
- /* Do the atomic update. */
old = __BITOPS_LOOP(addr, mask, __BITOPS_OR);
barrier();
return (old & mask) != 0;
}
-/*
- * SMP safe test_and_clear_bit routine based on compare and swap (CS)
- */
static inline int
-test_and_clear_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, old, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long old, mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make AND/test mask */
mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
- /* Do the atomic update. */
old = __BITOPS_LOOP(addr, mask, __BITOPS_AND);
barrier();
return (old & ~mask) != 0;
}
-/*
- * SMP safe test_and_change_bit routine based on compare and swap (CS)
- */
static inline int
-test_and_change_bit_cs(unsigned long nr, volatile unsigned long *ptr)
+test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr, old, mask;
+ unsigned long *addr = __bitops_word(nr, ptr);
+ unsigned long old, mask;
- addr = (unsigned long) ptr;
- /* calculate address for CS */
- addr += (nr ^ (nr & (BITS_PER_LONG - 1))) >> 3;
- /* make XOR/test mask */
mask = 1UL << (nr & (BITS_PER_LONG - 1));
- /* Do the atomic update. */
old = __BITOPS_LOOP(addr, mask, __BITOPS_XOR);
barrier();
return (old & mask) != 0;
}
-#endif /* CONFIG_SMP */
-/*
- * fast, non-SMP set_bit routine
- */
static inline void __set_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
-
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- asm volatile(
- " oc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_oi_bitmap[nr & 7]) : "cc");
-}
-
-static inline void
-__constant_set_bit(const unsigned long nr, volatile unsigned long *ptr)
-{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
- addr = ((unsigned long) ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- *(unsigned char *) addr |= 1 << (nr & 7);
+ *addr |= 1 << (nr & 7);
}
-#define set_bit_simple(nr,addr) \
-(__builtin_constant_p((nr)) ? \
- __constant_set_bit((nr),(addr)) : \
- __set_bit((nr),(addr)) )
-
-/*
- * fast, non-SMP clear_bit routine
- */
static inline void
__clear_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- asm volatile(
- " nc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_ni_bitmap[nr & 7]) : "cc");
+ *addr &= ~(1 << (nr & 7));
}
-static inline void
-__constant_clear_bit(const unsigned long nr, volatile unsigned long *ptr)
-{
- unsigned long addr;
-
- addr = ((unsigned long) ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- *(unsigned char *) addr &= ~(1 << (nr & 7));
-}
-
-#define clear_bit_simple(nr,addr) \
-(__builtin_constant_p((nr)) ? \
- __constant_clear_bit((nr),(addr)) : \
- __clear_bit((nr),(addr)) )
-
-/*
- * fast, non-SMP change_bit routine
- */
static inline void __change_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
-
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- asm volatile(
- " xc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_oi_bitmap[nr & 7]) : "cc");
-}
-
-static inline void
-__constant_change_bit(const unsigned long nr, volatile unsigned long *ptr)
-{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
- addr = ((unsigned long) ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- *(unsigned char *) addr ^= 1 << (nr & 7);
+ *addr ^= 1 << (nr & 7);
}
-#define change_bit_simple(nr,addr) \
-(__builtin_constant_p((nr)) ? \
- __constant_change_bit((nr),(addr)) : \
- __change_bit((nr),(addr)) )
-
-/*
- * fast, non-SMP test_and_set_bit routine
- */
static inline int
-test_and_set_bit_simple(unsigned long nr, volatile unsigned long *ptr)
+__test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- ch = *(unsigned char *) addr;
- asm volatile(
- " oc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_oi_bitmap[nr & 7])
- : "cc", "memory");
+ ch = *addr;
+ *addr |= 1 << (nr & 7);
return (ch >> (nr & 7)) & 1;
}
-#define __test_and_set_bit(X,Y) test_and_set_bit_simple(X,Y)
-/*
- * fast, non-SMP test_and_clear_bit routine
- */
static inline int
-test_and_clear_bit_simple(unsigned long nr, volatile unsigned long *ptr)
+__test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- ch = *(unsigned char *) addr;
- asm volatile(
- " nc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_ni_bitmap[nr & 7])
- : "cc", "memory");
+ ch = *addr;
+ *addr &= ~(1 << (nr & 7));
return (ch >> (nr & 7)) & 1;
}
-#define __test_and_clear_bit(X,Y) test_and_clear_bit_simple(X,Y)
-/*
- * fast, non-SMP test_and_change_bit routine
- */
static inline int
-test_and_change_bit_simple(unsigned long nr, volatile unsigned long *ptr)
+__test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
{
- unsigned long addr;
+ unsigned char *addr = __bitops_byte(nr, ptr);
unsigned char ch;
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- ch = *(unsigned char *) addr;
- asm volatile(
- " xc %O0(1,%R0),%1"
- : "+Q" (*(char *) addr) : "Q" (_oi_bitmap[nr & 7])
- : "cc", "memory");
+ ch = *addr;
+ *addr ^= 1 << (nr & 7);
return (ch >> (nr & 7)) & 1;
}
-#define __test_and_change_bit(X,Y) test_and_change_bit_simple(X,Y)
-
-#ifdef CONFIG_SMP
-#define set_bit set_bit_cs
-#define clear_bit clear_bit_cs
-#define change_bit change_bit_cs
-#define test_and_set_bit test_and_set_bit_cs
-#define test_and_clear_bit test_and_clear_bit_cs
-#define test_and_change_bit test_and_change_bit_cs
-#else
-#define set_bit set_bit_simple
-#define clear_bit clear_bit_simple
-#define change_bit change_bit_simple
-#define test_and_set_bit test_and_set_bit_simple
-#define test_and_clear_bit test_and_clear_bit_simple
-#define test_and_change_bit test_and_change_bit_simple
-#endif
-
-/*
- * This routine doesn't need to be atomic.
- */
-
-static inline int __test_bit(unsigned long nr, const volatile unsigned long *ptr)
+static inline int test_bit(unsigned long nr, const volatile unsigned long *ptr)
{
- unsigned long addr;
- unsigned char ch;
+ const volatile unsigned char *addr;
- addr = (unsigned long) ptr + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
- ch = *(volatile unsigned char *) addr;
- return (ch >> (nr & 7)) & 1;
-}
-
-static inline int
-__constant_test_bit(unsigned long nr, const volatile unsigned long *addr) {
- return (((volatile char *) addr)
- [(nr^(BITS_PER_LONG-8))>>3] & (1<<(nr&7))) != 0;
+ addr = ((const volatile unsigned char *)ptr);
+ addr += (nr ^ (BITS_PER_LONG - 8)) >> 3;
+ return (*addr >> (nr & 7)) & 1;
}
-#define test_bit(nr,addr) \
-(__builtin_constant_p((nr)) ? \
- __constant_test_bit((nr),(addr)) : \
- __test_bit((nr),(addr)) )
-
/*
* Optimized find bit helper functions.
*/
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-13 13:39:54 +0200