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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/alpha/include/asm/xchg.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/alpha/include/asm/xchg.h')
-rw-r--r--ANDROID_3.4.5/arch/alpha/include/asm/xchg.h258
1 files changed, 0 insertions, 258 deletions
diff --git a/ANDROID_3.4.5/arch/alpha/include/asm/xchg.h b/ANDROID_3.4.5/arch/alpha/include/asm/xchg.h
deleted file mode 100644
index 0ca97245..00000000
--- a/ANDROID_3.4.5/arch/alpha/include/asm/xchg.h
+++ /dev/null
@@ -1,258 +0,0 @@
-#ifndef _ALPHA_CMPXCHG_H
-#error Do not include xchg.h directly!
-#else
-/*
- * xchg/xchg_local and cmpxchg/cmpxchg_local share the same code
- * except that local version do not have the expensive memory barrier.
- * So this file is included twice from asm/cmpxchg.h.
- */
-
-/*
- * Atomic exchange.
- * Since it can be used to implement critical sections
- * it must clobber "memory" (also for interrupts in UP).
- */
-
-static inline unsigned long
-____xchg(_u8, volatile char *m, unsigned long val)
-{
- unsigned long ret, tmp, addr64;
-
- __asm__ __volatile__(
- " andnot %4,7,%3\n"
- " insbl %1,%4,%1\n"
- "1: ldq_l %2,0(%3)\n"
- " extbl %2,%4,%0\n"
- " mskbl %2,%4,%2\n"
- " or %1,%2,%2\n"
- " stq_c %2,0(%3)\n"
- " beq %2,2f\n"
- __ASM__MB
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (ret), "=&r" (val), "=&r" (tmp), "=&r" (addr64)
- : "r" ((long)m), "1" (val) : "memory");
-
- return ret;
-}
-
-static inline unsigned long
-____xchg(_u16, volatile short *m, unsigned long val)
-{
- unsigned long ret, tmp, addr64;
-
- __asm__ __volatile__(
- " andnot %4,7,%3\n"
- " inswl %1,%4,%1\n"
- "1: ldq_l %2,0(%3)\n"
- " extwl %2,%4,%0\n"
- " mskwl %2,%4,%2\n"
- " or %1,%2,%2\n"
- " stq_c %2,0(%3)\n"
- " beq %2,2f\n"
- __ASM__MB
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (ret), "=&r" (val), "=&r" (tmp), "=&r" (addr64)
- : "r" ((long)m), "1" (val) : "memory");
-
- return ret;
-}
-
-static inline unsigned long
-____xchg(_u32, volatile int *m, unsigned long val)
-{
- unsigned long dummy;
-
- __asm__ __volatile__(
- "1: ldl_l %0,%4\n"
- " bis $31,%3,%1\n"
- " stl_c %1,%2\n"
- " beq %1,2f\n"
- __ASM__MB
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (val), "=&r" (dummy), "=m" (*m)
- : "rI" (val), "m" (*m) : "memory");
-
- return val;
-}
-
-static inline unsigned long
-____xchg(_u64, volatile long *m, unsigned long val)
-{
- unsigned long dummy;
-
- __asm__ __volatile__(
- "1: ldq_l %0,%4\n"
- " bis $31,%3,%1\n"
- " stq_c %1,%2\n"
- " beq %1,2f\n"
- __ASM__MB
- ".subsection 2\n"
- "2: br 1b\n"
- ".previous"
- : "=&r" (val), "=&r" (dummy), "=m" (*m)
- : "rI" (val), "m" (*m) : "memory");
-
- return val;
-}
-
-/* This function doesn't exist, so you'll get a linker error
- if something tries to do an invalid xchg(). */
-extern void __xchg_called_with_bad_pointer(void);
-
-static __always_inline unsigned long
-____xchg(, volatile void *ptr, unsigned long x, int size)
-{
- switch (size) {
- case 1:
- return ____xchg(_u8, ptr, x);
- case 2:
- return ____xchg(_u16, ptr, x);
- case 4:
- return ____xchg(_u32, ptr, x);
- case 8:
- return ____xchg(_u64, ptr, x);
- }
- __xchg_called_with_bad_pointer();
- return x;
-}
-
-/*
- * Atomic compare and exchange. Compare OLD with MEM, if identical,
- * store NEW in MEM. Return the initial value in MEM. Success is
- * indicated by comparing RETURN with OLD.
- *
- * The memory barrier should be placed in SMP only when we actually
- * make the change. If we don't change anything (so if the returned
- * prev is equal to old) then we aren't acquiring anything new and
- * we don't need any memory barrier as far I can tell.
- */
-
-static inline unsigned long
-____cmpxchg(_u8, volatile char *m, unsigned char old, unsigned char new)
-{
- unsigned long prev, tmp, cmp, addr64;
-
- __asm__ __volatile__(
- " andnot %5,7,%4\n"
- " insbl %1,%5,%1\n"
- "1: ldq_l %2,0(%4)\n"
- " extbl %2,%5,%0\n"
- " cmpeq %0,%6,%3\n"
- " beq %3,2f\n"
- " mskbl %2,%5,%2\n"
- " or %1,%2,%2\n"
- " stq_c %2,0(%4)\n"
- " beq %2,3f\n"
- __ASM__MB
- "2:\n"
- ".subsection 2\n"
- "3: br 1b\n"
- ".previous"
- : "=&r" (prev), "=&r" (new), "=&r" (tmp), "=&r" (cmp), "=&r" (addr64)
- : "r" ((long)m), "Ir" (old), "1" (new) : "memory");
-
- return prev;
-}
-
-static inline unsigned long
-____cmpxchg(_u16, volatile short *m, unsigned short old, unsigned short new)
-{
- unsigned long prev, tmp, cmp, addr64;
-
- __asm__ __volatile__(
- " andnot %5,7,%4\n"
- " inswl %1,%5,%1\n"
- "1: ldq_l %2,0(%4)\n"
- " extwl %2,%5,%0\n"
- " cmpeq %0,%6,%3\n"
- " beq %3,2f\n"
- " mskwl %2,%5,%2\n"
- " or %1,%2,%2\n"
- " stq_c %2,0(%4)\n"
- " beq %2,3f\n"
- __ASM__MB
- "2:\n"
- ".subsection 2\n"
- "3: br 1b\n"
- ".previous"
- : "=&r" (prev), "=&r" (new), "=&r" (tmp), "=&r" (cmp), "=&r" (addr64)
- : "r" ((long)m), "Ir" (old), "1" (new) : "memory");
-
- return prev;
-}
-
-static inline unsigned long
-____cmpxchg(_u32, volatile int *m, int old, int new)
-{
- unsigned long prev, cmp;
-
- __asm__ __volatile__(
- "1: ldl_l %0,%5\n"
- " cmpeq %0,%3,%1\n"
- " beq %1,2f\n"
- " mov %4,%1\n"
- " stl_c %1,%2\n"
- " beq %1,3f\n"
- __ASM__MB
- "2:\n"
- ".subsection 2\n"
- "3: br 1b\n"
- ".previous"
- : "=&r"(prev), "=&r"(cmp), "=m"(*m)
- : "r"((long) old), "r"(new), "m"(*m) : "memory");
-
- return prev;
-}
-
-static inline unsigned long
-____cmpxchg(_u64, volatile long *m, unsigned long old, unsigned long new)
-{
- unsigned long prev, cmp;
-
- __asm__ __volatile__(
- "1: ldq_l %0,%5\n"
- " cmpeq %0,%3,%1\n"
- " beq %1,2f\n"
- " mov %4,%1\n"
- " stq_c %1,%2\n"
- " beq %1,3f\n"
- __ASM__MB
- "2:\n"
- ".subsection 2\n"
- "3: br 1b\n"
- ".previous"
- : "=&r"(prev), "=&r"(cmp), "=m"(*m)
- : "r"((long) old), "r"(new), "m"(*m) : "memory");
-
- return prev;
-}
-
-/* This function doesn't exist, so you'll get a linker error
- if something tries to do an invalid cmpxchg(). */
-extern void __cmpxchg_called_with_bad_pointer(void);
-
-static __always_inline unsigned long
-____cmpxchg(, volatile void *ptr, unsigned long old, unsigned long new,
- int size)
-{
- switch (size) {
- case 1:
- return ____cmpxchg(_u8, ptr, old, new);
- case 2:
- return ____cmpxchg(_u16, ptr, old, new);
- case 4:
- return ____cmpxchg(_u32, ptr, old, new);
- case 8:
- return ____cmpxchg(_u64, ptr, old, new);
- }
- __cmpxchg_called_with_bad_pointer();
- return old;
-}
-
-#endif