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hv: atomic: remove atomic load/store and set/clear

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In x86 architecture, word/doubleword/quadword aligned read/write on its boundary
is atomic, so we may remove atomic load/store.
As for atomic set/clear, use bitmap_set/claer seems more reasonable. After replace
them all, we could remove them too.

Tracked-On: #1842
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1 2019-07-16 22:30:44 +08:00 committed by ACRN System Integration
parent b39526f759
commit e352553e1a
1 changed files with 0 additions and 89 deletions
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89
hypervisor/include/arch/x86/lib/atomic.h
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@ -33,32 +33,6 @@
#define BUS_LOCK "lock ; " #define BUS_LOCK "lock ; "
#define build_atomic_load(name, size, type) \
static inline type name(const volatile type *ptr) \
{ \
type ret; \
asm volatile("mov" size " %1,%0" \
: "=r" (ret) \
: "m" (*ptr) \
: "cc", "memory"); \
return ret; \
}
build_atomic_load(atomic_load16, "w", uint16_t)
build_atomic_load(atomic_load32, "l", uint32_t)
build_atomic_load(atomic_load64, "q", uint64_t)
#define build_atomic_store(name, size, type) \
static inline void name(volatile type *ptr, type v) \
{ \
asm volatile("mov" size " %1,%0" \
: "=m" (*ptr) \
: "r" (v) \
: "cc", "memory"); \
}
build_atomic_store(atomic_store16, "w", uint16_t)
build_atomic_store(atomic_store32, "l", uint32_t)
build_atomic_store(atomic_store64, "q", uint64_t)
#define build_atomic_inc(name, size, type) \ #define build_atomic_inc(name, size, type) \
static inline void name(type *ptr) \ static inline void name(type *ptr) \
{ \ { \
@ -81,69 +55,6 @@ build_atomic_dec(atomic_dec16, "w", uint16_t)
build_atomic_dec(atomic_dec32, "l", uint32_t) build_atomic_dec(atomic_dec32, "l", uint32_t)
build_atomic_dec(atomic_dec64, "q", uint64_t) build_atomic_dec(atomic_dec64, "q", uint64_t)
/**
* #define atomic_set32(P, V) (*(uint32_t *)(P) |= (V))
*
* Parameters:
* uint32_t* p A pointer to memory area that stores source
* value and setting result;
* uint32_t v The value needs to be set.
*/
static inline void atomic_set32(uint32_t *p, uint32_t v)
{
__asm __volatile(BUS_LOCK "orl %1,%0"
: "+m" (*p)
: "r" (v)
: "cc", "memory");
}
/*
* #define atomic_clear32(P, V) (*(uint32_t *)(P) &= ~(V))
* Parameters:
* uint32_t* p A pointer to memory area that stores source
* value and clearing result;
* uint32_t v The value needs to be cleared.
*/
static inline void atomic_clear32(uint32_t *p, uint32_t v)
{
__asm __volatile(BUS_LOCK "andl %1,%0"
: "+m" (*p)
: "r" (~v)
: "cc", "memory");
}
/*
* #define atomic_set64(P, V) (*(uint64_t *)(P) |= (V))
*
* Parameters:
* uint64_t* p A pointer to memory area that stores source
* value and setting result;
* uint64_t v The value needs to be set.
*/
static inline void atomic_set64(uint64_t *p, uint64_t v)
{
__asm __volatile(BUS_LOCK "orq %1,%0"
: "+m" (*p)
: "r" (v)
: "cc", "memory");
}
/*
* #define atomic_clear64(P, V) (*(uint64_t *)(P) &= ~(V))
*
* Parameters:
* uint64_t* p A pointer to memory area that stores source
* value and clearing result;
* uint64_t v The value needs to be cleared.
*/
static inline void atomic_clear64(uint64_t *p, uint64_t v)
{
__asm __volatile(BUS_LOCK "andq %1,%0"
: "+m" (*p)
: "r" (~v)
: "cc", "memory");
}
#define build_atomic_swap(name, size, type) \ #define build_atomic_swap(name, size, type) \
static inline type name(type *ptr, type v) \ static inline type name(type *ptr, type v) \
{ \ { \