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Commit 2579a70e authored by Federico Vaga's avatar Federico Vaga
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rt: extend shared memory API 

Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
parent e3fd6f0e
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Showing with 38 additions and 2 deletions
applications/common/rt/rt-smem.h
View file @ 2579a70e
......@@ -24,13 +24,22 @@
#define SMEM __attribute__((section(".smem")))
/**
* Perform an operation on a given pointer. Operation can be performed only
* on integer variables
*/
static inline void __smem_atomic_op(int *p, int x, unsigned int range)
{
*(volatile int *)(p + (range >> 2)) = x;
}
/**
* Add x to the value in the shared memory pointed by p
*/
static inline void smem_atomic_add(int *p, int x)
{
*(volatile int *)(p + (SMEM_RANGE_ADD >> 2)) = x;
__smem_atomic_op(p, x, SMEM_RANGE_ADD);
}
......@@ -39,7 +48,34 @@ static inline void smem_atomic_add(int *p, int x)
*/
static inline void smem_atomic_sub(int *p, int x)
{
*(volatile int *)(p + (SMEM_RANGE_SUB >> 2)) = x;
__smem_atomic_op(p, x, SMEM_RANGE_SUB);
}
/**
* Do "OR" between x and the value in the shared memory pointed by p
*/
static inline void smem_atomic_or(int *p, int x)
{
__smem_atomic_op(p, x, SMEM_RANGE_SET);
}
/**
* Do "AND ~" between x and the value in the shared memory pointed by p
*/
static inline void smem_atomic_and_not(int *p, int x)
{
__smem_atomic_op(p, x, SMEM_RANGE_CLEAR);
}
/**
* Do "XOR" between x and the value in the shared memory pointed by p
*/
static inline void smem_atomic_xor(int *p, int x)
{
__smem_atomic_op(p, x, SMEM_RANGE_FLIP);
}
#endif
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