[PARTIAL CHERRYPICK]alloc: userspace: Introduce MMU shared memory heap

Partially cherry-pick header modifications in the alloc.h files from
82b2c2a ("alloc: userspace: Introduce MMU shared memory heap")
to help with easier port of bugfixes.

Author: Daniel Baluta

posix/include/rtos/alloc.h

@@ -33,19 +33,21 @@
  */
 
  /** \brief Indicates we should return DMA-able memory. */
-#define SOF_MEM_FLAG_DMA	BIT(0)
+#define SOF_MEM_FLAG_DMA		BIT(0)
 /** \brief Indicates that original content should not be copied by realloc. */
-#define SOF_MEM_FLAG_NO_COPY	BIT(1)
+#define SOF_MEM_FLAG_NO_COPY		BIT(1)
 /** \brief Indicates that if we should return uncached address. */
-#define SOF_MEM_FLAG_COHERENT	BIT(2)
+#define SOF_MEM_FLAG_COHERENT		BIT(2)
 /** \brief Indicates that if we should return L3 address. */
-#define SOF_MEM_FLAG_L3		BIT(3)
+#define SOF_MEM_FLAG_L3			BIT(3)
 /** \brief Indicates that if we should return Low power memory address. */
-#define SOF_MEM_FLAG_LOW_POWER	BIT(4)
+#define SOF_MEM_FLAG_LOW_POWER		BIT(4)
 /** \brief Indicates that if we should return kernel memory address. */
-#define SOF_MEM_FLAG_KERNEL	BIT(5)
+#define SOF_MEM_FLAG_KERNEL		BIT(5)
 /** \brief Indicates that if we should return user memory address. */
-#define SOF_MEM_FLAG_USER	BIT(6)
+#define SOF_MEM_FLAG_USER		BIT(6)
+/** \brief Indicates that if we should return shared user memory address. */
+#define SOF_MEM_FLAG_USER_SHARED_BUFFER	BIT(7)
 
 /** @} */
 

zephyr/include/rtos/alloc.h

@@ -24,19 +24,21 @@
  */
 
  /** \brief Indicates we should return DMA-able memory. */
-#define SOF_MEM_FLAG_DMA	BIT(0)
+#define SOF_MEM_FLAG_DMA		BIT(0)
 /** \brief Indicates that original content should not be copied by realloc. */
-#define SOF_MEM_FLAG_NO_COPY	BIT(1)
+#define SOF_MEM_FLAG_NO_COPY		BIT(1)
 /** \brief Indicates that if we should return uncached address. */
-#define SOF_MEM_FLAG_COHERENT	BIT(2)
+#define SOF_MEM_FLAG_COHERENT		BIT(2)
 /** \brief Indicates that if we should return L3 address. */
-#define SOF_MEM_FLAG_L3		BIT(3)
+#define SOF_MEM_FLAG_L3			BIT(3)
 /** \brief Indicates that if we should return Low power memory address. */
-#define SOF_MEM_FLAG_LOW_POWER	BIT(4)
+#define SOF_MEM_FLAG_LOW_POWER		BIT(4)
 /** \brief Indicates that if we should return kernel memory address. */
-#define SOF_MEM_FLAG_KERNEL	BIT(5)
+#define SOF_MEM_FLAG_KERNEL		BIT(5)
 /** \brief Indicates that if we should return user memory address. */
-#define SOF_MEM_FLAG_USER	BIT(6)
+#define SOF_MEM_FLAG_USER		BIT(6)
+/** \brief Indicates that if we should return shared user memory address. */
+#define SOF_MEM_FLAG_USER_SHARED_BUFFER	BIT(7)
 
 /** @} */
 
@@ -111,4 +113,21 @@ static inline void heap_trace_all(int force) {}
 
 /** @}*/
 
+#if CONFIG_USERSPACE
+/**
+ * Returns the start address of shared memory heap for buffers.
+ *
+ * @return pointer to shared memory heap start
+ */
+uintptr_t get_shared_buffer_heap_start(void);
+
+/**
+ * Returns the size of shared memory heap for buffers.
+ *
+ * @return size of shared memory heap start
+ */
+size_t get_shared_buffer_heap_size(void);
+
+#endif
+
 #endif /* __ZEPHYR_RTOS_ALLOC_H__ */