Intel(R) IQ80315 I/O Processor DMA and XOR Library APIs and ...

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Contents8.4 Changing from DMA to XOR Descriptors on the Same Channel ....................................... 288.5 Error Handling..................................................................................................................... 288.6 DMA/XOR Channel Arbitration for the SFN Port ................................................................ 298.7 GNUPro Toolset Compiler Optimization ............................................................................. 298.8 Reclamation of Descriptors................................................................................................. 298.9 Extending Library to Run with Multiple Threads ................................................................. 298.10 When Using Append / Resume Sequence .........................................................................298.11 Append Operation Sequencing........................................................................................... 308.12 DMA or XOR Descriptors Variables should be Volatile ...................................................... 309.0 Conclusion................................................................................................................................... 31A Library Flow Charts..................................................................................................................... 32B Library Data Structures............................................................................................................... 41B.1 Descriptor Headers..................................................................................................................... 41B.2 DMA Descriptors ........................................................................................................................ 41B.3 XOR Descriptors......................................................................................................................... 41B.4 Intel ® XScale Microarchitecture Page Tablesand Library Memory Map (xscale.h) ........................................................................................... 43C DMAXOR80314.h ......................................................................................................................... 44D dmaxor_desc_mgr.h ................................................................................................................... 64E Library Function Prototypes ...................................................................................................... 69E.1 Functions Included in xscale.h and xscale.c .............................................................................. 69E.1.1 void lib_flush_data_cache(void) .................................................................................... 69E.1.2 int lib_memmap_malloc(int dma_desc_Mbs,int XOR_desc_Mbs, int data_Mbs)................................................................................ 69E.1.3 void lib_set_xcb_mem_range(unsigned int xcb,void * virt_addr_base, int size_in_bytes) ....................................................................... 69E.1.4 Page_Type lib_get_page_attributes(unsigned long virt_addr) ...................................... 70E.1.5 Page_Type lib_set_page_xcb(unsigned long base,unsigned int xcb) ........................................................................................................... 70E.2 Functions included in dmaxor_desc_mgr.hand dmaxor_desc_mgr.c ............................................................................................................71E.2.1 XorDma_80314_Type * lib_new_mgr(void)................................................................... 71E.2.2 int lib_buffersize(void)....................................................................................................71E.2.3 void lib_init(XorDma_80314_Type * mgrt,void * desc_baseaddr)...................................................................................................72E.2.4 void lib_free_mgr(XorDma_80314_Type * mgr) ............................................................72E.2.5 void * lib_stack_pop(XorDma_80314_Type * mgr,enum CHANNEL channel)............................................................................................. 72E.2.6 Bool lib_stack_push(XorDma_80314_Type * mgr,E.2.7void * frame, enum CHANNEL channel)........................................................................ 73void * lib_top_of_stack(XorDma_80314_Type * mgr,enum CHANNEL channel)............................................................................................. 73E.2.8 inline int ............... lib_postq_appnd_resume_sdram(XorDma_80314_Type * mgr, void *frame,enum PORT port,enum GCSR_OP_CMD cmd,unsigned int gcsr,enum CHANNELchannel)74E.2.9int lib_reclaim(XorDma_80314_Type * mgr,enum CHANNEL channel)............................................................................................. 744 APIs and Testbench White Paper
ContentsE.2.10 void * lib_q_get(XorDma_80314_Type * mgr, enum CHANNEL channel) ....................75E.2.11 int lib_q_put(XorDma_80314_Type * mgr, void * frame,enum CHANNEL channel).............................................................................................76E.3 Functions Included in chain_interrupt.h and chain_interrupt.c ...................................................77E.3.1 void intHandlerDetach(void) ..........................................................................................77E.3.2 void callintHandlerAttach(void) ......................................................................................77E.3.3 void intHandlerAttach(void (*irq)(void),void (*fiq)(void)).................................................77E.3.4 void lib_irq_handler(void)__attribute__ ((__naked__)) ..................................................78E.3.5 void lib_fiq_handler(void)__attribute__ ((__naked__)) ..................................................78F Testbench: Data Structures........................................................................................................79F.1 bench.h.......................................................................................................................................79G Test Bench Library Function Prototypes ..................................................................................80G.1 bench.c .......................................................................................................................................80G.1.1 int main(void); ................................................................................................................80G.1.2 void print_title(enum build b)..........................................................................................80G.1.3 void generate_src_dst(void); .........................................................................................80G.2 lib_demo_cases.c .......................................................................................................................81G.2.1 void lib_demo_sdram(void)............................................................................................81H Redboot Memory Map .................................................................................................................82IExample Code..............................................................................................................................83J Related Documents .....................................................................................................................90APIs and Testbench White Paper 5
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