2 * \file trc_tgt_mem_access_i.h
3 * \brief OpenCSD : Target memory read interface.
5 * \copyright Copyright (c) 2015, ARM Limited. All Rights Reserved.
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35 #ifndef ARM_TRC_TGT_MEM_ACCESS_I_H_INCLUDED
36 #define ARM_TRC_TGT_MEM_ACCESS_I_H_INCLUDED
39 * @class ITargetMemAccess
41 * @brief Interface to target memory access.
43 * @ingroup ocsd_interfaces
45 * Read Target memory call is used by the decoder to access the memory location in the
46 * target memory space for the next instruction(s) to be traced.
48 * Memory data returned is to be little-endian.
50 * The implementator of this interface could either use file(s) containing dumps of memory
51 * locations from the target, be an elf file reader extracting code, or a live target
52 * connection, depending on the tool execution context.
56 class ITargetMemAccess
59 ITargetMemAccess() {}; /**< default interface constructor */
60 virtual ~ITargetMemAccess() {}; /**< default interface destructor */
63 * Read a block of target memory into supplied buffer.
65 * Bytes read set less than bytes required, along with a success return code indicates full memory
66 * location not accessible. Function will return all accessible bytes from the address up to the point
67 * where the first inaccessible location appears.
69 * The cs_trace_id associates a memory read with a core. Different cores may have different memory spaces,
70 * the memory access may take this into account. Access will first look in the registered memory areas
71 * associated with the ID, failing that will look into any global memory spaces.
73 * @param address : Address to access.
74 * @param cs_trace_id : protocol source trace ID.
75 * @param mem_space : Memory space to access, (secure, non-secure, optionally with EL, or any).
76 * @param num_bytes : [in] Number of bytes required. [out] Number of bytes actually read.
77 * @param *p_buffer : Buffer to fill with the bytes.
79 * @return ocsd_err_t : OCSD_OK on successful access (including memory not available)
81 virtual ocsd_err_t ReadTargetMemory( const ocsd_vaddr_t address,
82 const uint8_t cs_trace_id,
83 const ocsd_mem_space_acc_t mem_space,
85 uint8_t *p_buffer) = 0;
89 #endif // ARM_TRC_TGT_MEM_ACCESS_I_H_INCLUDED
91 /* End of File trc_tgt_mem_access_i.h */