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B_ QuRT_ User_ Guide(31)

2022-06-30 22:04:00 【weixin_ thirty-eight million four hundred and ninety-eight thou】

B_QuRT_User_Guide（31 ）

21.4 qurt_mapping_create()

21.4.1 Function document

21.4.1.1 int qurt_mapping_create ( qurt_addr_t vaddr, qurt_addr_t paddr, qurt_size_t size, qurt_mem_cache_mode_t cache_attribs, qurt_perm_t perm )

Create a memory map in the page table .

Related data types
qurt_addr_t
qurt_size_t
qurt_mem_cache_mode_t
qurt_perm_t
Parameters
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Return value
QURT_EOK - Mapping creation .
QURT_EMEM - Failed to create mapping .

Dependencies
None.

21.5 qurt_mapping_create_64()

21.5.1 Function document

21.5.1.1 int qurt_mapping_create_64 ( qurt_addr_t vaddr, qurt_paddr_64_t paddr_64, qurt_size_t size, qurt_mem_cache_mode_t cache_attribs, qurt_perm_t perm )

Create a memory map in the page table .
Related data types
qurt_addr_t
qurt_paddr_64_t
qurt_size_t
qurt_mem_cache_mode_t
qurt_perm_t
Parameters
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Return value
None.

Dependencies
None.

21.6 qurt_mapping_remove()

21.6.1 Function document

21.6.1.1int qurt_mapping_remove ( qurt_addr_t vaddr, qurt_addr_t paddr, qurt_size_t size )

Deletes the specified memory map from the page table .
Related data types
qurt_addr_t
qurt_size_t
Parameters
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Return value
QURT_EOK - Map created .
Dependencies
None.

21.7 qurt_mapping_remove_64()

21.7.1 Function document

21.7.1.1 int qurt_mapping_remove_64 ( qurt_addr_t vaddr, qurt_paddr_64_t paddr_64, qurt_size_t size )

Deletes the specified memory map from the page table .
Related data types
qurt_addr_t
qurt_paddr_64_t
qurt_size_t
Parameters
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Return value

QURT_EOK - success .
Dependencies
None.

21.8 qurt_mem_barrier()

21.8.1 Function document

21.8.1.1 static void qurt_mem_barrier ( void )

Create a barrier for memory transactions .
This operation ensures that before any future memory transactions can be observed globally , All previous memory transactions are globally observable .
Be careful ： This operation is as Hexagon barrier Instruction wrapper .
Return value
None.
Dependencies
None.

21.9 qurt_mem_cache_clean()

21.9.1 Function document

21.9.1.1 int qurt_mem_cache_clean ( qurt_addr_t addr, qurt_size_t size, qurt_mem_cache_op_t opcode, qurt_mem_cache_type_t type )

Perform cache cleanup on the data stored in the specified memory area . When Hexagon Processor version is V60 Or higher , Coordinate all data caching operations .
Be careful ： Only refresh all operations on the data cache .
This operation flushes and causes the from start address to end address （ Initial address + size ） The contents of all cached rows of are invalid . If the contents of adjacent buffers fall in any buffer line , Can be refreshed and invalidated .
Related data types
qurt_addr_t
qurt_size_t
qurt_mem_cache_op_t
qurt_mem_cache_type_t
Parameters
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Return value
QURT_EOK - Cache operation successfully executed .
QURT_EVAL - Invalid cache type .
QURT_EALIGN - Failed to align data or address .