B_ QuRT_ User_ Guide(32)

21.10 qurt_mem_cache_clean2()

21.10.1 Function document

21.10.1.1 int qurt_mem_cache_clean2 ( qurt_addr_t addr, qurt_size_t size, qurt_mem_cache_op_t opcode, qurt_mem_cache_type_t type )

Perform a data cache cleanup operation on the data stored in the specified memory area . The API Only perform the following data cache operations .

• qurt_mem_cache_flush
• qurt_mem_cache_invalidate
• qurt_mem_cache_flush_invalidate
  This operation washes away / Verified from start address to end address （ Start address + size ） The contents of all cached rows . If the contents of adjacent buffers fall in any buffer line , Can be refreshed / verification .

Related data types

qurt_addr_t
qurt_size_t
qurt_mem_cache_op_t
qurt_mem_cache_type_t

Parameters

Return value
QURT_EOK – Cache operation performed successfully.
QURT_EVAL – Invalid cache type.

Dependencies
None.

21.11 qurt_mem_cache_phys_clean()

21.11.1 Function document

21.11.1.1 int qurt_mem_cache_phys_clean ( unsigned int mask, unsigned int addrmatch, qurt_mem_cache_op_t opcode )

Match and mask according to the address , Perform cache cleanup on the data stored in the specified memory area . When (LINE.PhysicalPageNumber & MASK) == ADDRMATCH when , Operate on a cache row .
Be careful ：addrmatch The value should be the upper... To match 24 Bit physical address .

Related data types

qurt_mem_cache_op_t
Parameters

Return value
QURT_EOK - Cache operation successfully executed .
QURT_EVAL - Invalid operation

Dependencies
None.

21.12 qurt_mem_configure_cache_partition()

21.12.1 Function document

21.12.1.1 int qurt_mem_configure_cache_partition ( qurt_cache_type_t cache_type, qurt_cache_partition_size_t partition_size )

Configure at the system level Hexagon Cache partition .
Partition size value SEVEN_EIGHTHS_SIZE Only applicable to L2 cache . stay Hexagon Processor version V60 Or later versions do not support L1 Cache partition . Be careful ： Only in QuRT This operation is called with the permission of the operating system .
Related data types
qurt_cache_type_t
qurt_cache_partition_size_t

Parameters

Return value

QURT_EOK – Success.
QURT_EVAL – Error.

Dependencies
None.
## 21.12 qurt_mem_configure_cache_partition()

21.13 qurt_mem_l2cache_line_lock()

21.13.1 Function document

21.13.1.1 int qurt_mem_l2cache_line_lock ( qurt_addr_t addr, qurt_size_t size )

Configure at the system level Hexagon Cache partition .
Partition size value SEVEN_EIGHTHS_SIZE Only applicable to L2 cache . stay Hexagon Processor version V60 Or later versions do not support L1 Cache partition . Be careful ： Only in QuRT This operation is called with the permission of the operating system .
Related data types
qurt_addr_t
qurt_size_t

Parameters

Return value
QURT_EOK - success .
QURT_EALIGN - Data alignment or address failure .
Dependencies
None.

21.14 qurt_mem_l2cache_line_unlock()

21.14.1 Function document

21.14.1.1 int qurt_mem_l2cache_line_unlock ( qurt_addr_t addr, qurt_size_t size )

Perform an unlocking operation of L2 cache rows . This function is in the L2 Unlock selective rows in the cache .
Selective lines in memory .
Be careful ： Only right 32 The byte aligned size and address perform the row unlocking operation .
Related data types
qurt_addr_t
qurt_size_t

Parameters

Return value
QURT_EOK - success .
QURT_EALIGN - Failed to align data or address .QURT_EFAILED - operation failed , Cannot find a matching tag .
Dependencies
None.

21.15 qurt_mem_map_static_query()

21.15.1 Function document

21.15.1.1 int qurt_mem_map_static_query ( qurt_addr_t ∗ vaddr, qurt_addr_t paddr, unsigned int page_size, qurt_mem_cache_mode_t cache_attribs, qurt_perm_t perm )

Determines whether a memory page is statically mapped . The page is specified by the following properties ： Physical address 、 Page size 、 Cache mode and memory permissions .

• If the specified page is statically mapped ,vaddr Return the virtual address of the page .
• If the page is not statically mapped （ Or the specified page does not exist ）,vaddr return -1 As a virtual address value .
  The system configuration file defines QuRT Memory mapping .
  Related data types
  qurt_addr_t
  qurt_mem_cache_mode_t
  qurt_perm_t
  Parameters
  
  Return value
  QURT_EOK - The specified page is statically mapped ,vaddr Return the virtual address .QURT_EMEM - The specified page is not statically mapped ,vaddr return -1.QURT_EVAL - The specified page does not exist .
  Dependencies
  None.