DSP/BIOS™ LINK The foundation for GPP-DSP solutions

What is DSP/BIOS™ Link?  It is a foundation software for the inter-processor communication across the GPP-DSP boundary.  It can be used across: –SoCs with GPP and DSP. –Discrete GPP and DSP platforms.  Target Operating Systems: –On DSP: DSP/BIOS™ –On GPP: OS of your choice.  Can be ported to any OS using the porting kit…

Features Supported  DSP Boot-loading  Messaging  Data Transfer

DSP Boot-loading  DSP executable is present in the GPP file system  The specified executable is loaded into DSP memory (internal/external)  The DSP execution is started at its entry point  Boot-loading using: MPUI, HPI, PCI etc. GPPDSP DSP internal memory DSP component External Memory GPP File System DSP Executable PROC component HAL

Messaging  Messaging provides logical connectivity between GPP and DSP clients  Messages are sent at a higher priority than data buffers  Messages can be variable sized  Messages are sent and received through Message Queues  Message Queues have unique system-wide names. Senders locate the Message Queue using this name to send messages to it.  Message Queue can have single reader, multiple writers Message Queue object Reader Writer

Data Transfer  Data Channel is a virtual entity providing interface to send / receive data buffers over a physical connection.  Multiple data channels are multiplexed over the same physical link.  These are uni-directional.  They use the issue/ reclaim model followed by SIO. Data DestinationData Source CHNL_Reclaim () Empty Buffers CHNL_Reclaim ()CHNL_Issue () Empty Buffers Filled Buffers

Features of DSP/BIOS™ Link  Source Code release –‘C’ API. –IOM Driver Model. –Constructed using principles of ‘Design by Contract’.  Portable –OS Adaptation Layer allows easy porting to a different OS without changing basic functionality. –Modular Design for scalability limits scope of change in the system i.e. change/ update with local scope is contained within component.  Scalable –Link with command messaging, data transfer and DSP boot loading capabilities –Link with command messaging functionality only. –Link with data streaming functionality only. –Basic Link DSP with boot loading functionality only. –Basic DSP Control functions only.

Advantages of DSP/BIOS™ Link  A generic API that abstracts the characteristics of the DSP and physical link connecting GPP and DSP from the applications.  Ensures that API can be scaled to the needs of target application and/or deployed environment.  Ensures that API is portable across different GPP operating systems. –Applications are portable across platforms & operating systems. The level of portability may be influenced by various factors…  Enables development of application specific frameworks e.g. Audio, Video, Automotive (!)…

Software Architecture

Product Software Architecture DSP/BIOS GPPOS PROCESSOR MANAGER OSADAPTATIONLAYERLINKDRIVER OTHERDRIVERS APPLICATION / INFRASTRUCTURE DSP/BIOS LINK GPP OSDSP/BIOS Application Drivers DSP/BIOS Link Boundary APPLICATION / INFRASTRUCTURE API GPP LINKDRIVER DSP

GPP-side GPP PROCESSOR MANAGER OSAL LINK DRIVER APPLICATION / INFRASTRUCTURE CFG TRC KFILE PRCS SYNC MEM ISR DPC DRV LDRV_PROC LDRV_CHNLLDRV_MSGQ LDRV_DATA DSP PMGR_PROC PMGR_CHNLPMGR_MSGQ COFF LINK DRIVER INTERFACE DSP/BIOS™ LINK API PROC CHNLMSGQ _DATA _MQT _IPS POOL LDRV_POOL _POOL LDRV_DRV _DRV Boot Loading Data Transfer Messaging Data Transfer And/Or Messaging Color coding

DSP/BIOS DSP-side APPLICATION / INFRASTRUCTURE DSP LINK DRIVER STANDARD DSP/BIOS API OTHER DRIVERS SIOGIOMSGQ _DATA _MQT _IPS _POOL _DRV POOL Boot Loading Data Transfer Messaging Data Transfer And/Or Messaging Color coding

APIs

PROC  This component provides APIs for boot-loading and controlling the execution of DSP. PROC_Instrument PROC_GetStatePROC_Debug PROC_Control PROC_StopPROC_Start PROC_Load PROC_DetachPROC_Attach PROC_DestroyPROC_Setup

CHNL  This component provides capability to stream data between clients running on GPP with clients running on DSP. CHNL_Instrument CHNL_Debug CHNL_Control CHNL_FlushCHNL_Idle CHNL_ReclaimCHNL_Issue CHNL_FreeBufferCHNL_AllocateBuffer CHNL_DeleteCHNL_Create

MSGQ  This component provides capability to exchange variable sized messages between clients running on GPP and those running on DSP. MSGQ_InstrumentMSGQ_Debug MSGQ_SetErrorHandlerMSGQ_GetSrcQueue MSGQ_GetMSGQ_Put MSGQ_FreeMSGQ_Alloc MSGQ_Release MSGQ_LocateAsyncMSGQ_Locate MSGQ_CloseMSGQ_Open MSGQ_TransportCloseMSGQ_TransportOpen