diff options
Diffstat (limited to 'src/systemc/ext/tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h')
| -rw-r--r-- | src/systemc/ext/tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/src/systemc/ext/tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h b/src/systemc/ext/tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h new file mode 100644 index 000000000..99bb1e969 --- /dev/null +++ b/src/systemc/ext/tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h @@ -0,0 +1,402 @@ +/***************************************************************************** + + Licensed to Accellera Systems Initiative Inc. (Accellera) under one or + more contributor license agreements. See the NOTICE file distributed + with this work for additional information regarding copyright ownership. + Accellera licenses this file to you under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with the + License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + *****************************************************************************/ + +// 12-Jan-2009 John Aynsley Bug fix. has_mm() and get_ref_count() should both be const +// 23-Mar-2009 John Aynsley Add method update_original_from() +// 20-Apr-2009 John Aynsley Bug fix for 64-bit machines: unsigned long int -> unsigned int +// 5-May-2011 JA and Philipp Hartmann Add tlm_gp_option, set_gp_option, get_gp_option +// 11-May-2011 John Aynsley Add run-time check to release() + + +#ifndef TLM_CORE_TLM2_TLM_GP_H_INCLUDED_ +#define TLM_CORE_TLM2_TLM_GP_H_INCLUDED_ + +#include "sysc/kernel/sc_cmnhdr.h" // SC_API +#include "sysc/utils/sc_report.h" // sc_assert +#include "sysc/datatypes/int/sc_nbdefs.h" // sc_dt::uint64 + +#include "tlm_core/tlm_2/tlm_generic_payload/tlm_array.h" + +#include <typeinfo> // std::type_info + +namespace tlm { + +class tlm_generic_payload; + +class tlm_mm_interface { +public: + virtual void free(tlm_generic_payload*) = 0; + virtual ~tlm_mm_interface() {} +}; + +//--------------------------------------------------------------------------- +// Classes and helpers for the extension mechanism +//--------------------------------------------------------------------------- +// Helper function: +SC_API unsigned int max_num_extensions(); + +// This class can be used for storing pointers to the extension classes, used +// in tlm_generic_payload: +class SC_API tlm_extension_base +{ +public: + virtual tlm_extension_base* clone() const = 0; + virtual void free() { delete this; } + virtual void copy_from(tlm_extension_base const &) = 0; +protected: + virtual ~tlm_extension_base() {} + static unsigned int register_extension(const std::type_info&); +}; + +// Base class for all extension classes, derive your extension class in +// the following way: +// class my_extension : public tlm_extension<my_extension> { ... +// This triggers proper extension registration during C++ static +// contruction time. my_extension::ID will hold the unique index in the +// tlm_generic_payload::m_extensions array. +template <typename T> +class tlm_extension : public tlm_extension_base +{ +public: + virtual tlm_extension_base* clone() const = 0; + virtual void copy_from(tlm_extension_base const &ext) = 0; + virtual ~tlm_extension() {} + const static unsigned int ID; +}; + +template <typename T> +const unsigned int tlm_extension<T>::ID + = tlm_extension_base::register_extension(typeid(T)); + +//--------------------------------------------------------------------------- +// enumeration types +//--------------------------------------------------------------------------- +enum tlm_command { + TLM_READ_COMMAND, + TLM_WRITE_COMMAND, + TLM_IGNORE_COMMAND +}; + +enum tlm_response_status { + TLM_OK_RESPONSE = 1, + TLM_INCOMPLETE_RESPONSE = 0, + TLM_GENERIC_ERROR_RESPONSE = -1, + TLM_ADDRESS_ERROR_RESPONSE = -2, + TLM_COMMAND_ERROR_RESPONSE = -3, + TLM_BURST_ERROR_RESPONSE = -4, + TLM_BYTE_ENABLE_ERROR_RESPONSE = -5 +}; + +enum tlm_gp_option { + TLM_MIN_PAYLOAD, + TLM_FULL_PAYLOAD, + TLM_FULL_PAYLOAD_ACCEPTED +}; + +#define TLM_BYTE_DISABLED 0x0 +#define TLM_BYTE_ENABLED 0xff + +//--------------------------------------------------------------------------- +// The generic payload class: +//--------------------------------------------------------------------------- + +SC_API_TEMPLATE_DECL_ tlm_array<tlm_extension_base*>; + +class SC_API tlm_generic_payload { + +public: + //--------------- + // Constructors + //--------------- + + // Default constructor + tlm_generic_payload(); + explicit tlm_generic_payload(tlm_mm_interface* mm); + + void acquire() { sc_assert(m_mm != 0); m_ref_count++; } + + void release() { + sc_assert(m_mm != 0 && m_ref_count > 0); + if (--m_ref_count==0) + m_mm->free(this); + } + + int get_ref_count() const { return m_ref_count; } + + void set_mm(tlm_mm_interface* mm) { m_mm = mm; } + bool has_mm() const { return m_mm != 0; } + + void reset(); + +private: + //disabled copy ctor and assignment operator. + tlm_generic_payload(const tlm_generic_payload& x) /* = delete */; + tlm_generic_payload& operator= (const tlm_generic_payload& x) /* = delete */; + +public: + // non-virtual deep-copying of the object + void deep_copy_from(const tlm_generic_payload & other); + + // To update the state of the original generic payload from a deep copy + // Assumes that "other" was created from the original by calling deep_copy_from + // Argument use_byte_enable_on_read determines whether to use or ignores byte enables + // when copying back the data array on a read command + + void update_original_from(const tlm_generic_payload & other, + bool use_byte_enable_on_read = true); + + void update_extensions_from(const tlm_generic_payload & other); + + // Free all extensions. Useful when reusing a cloned transaction that doesn't have memory manager. + // normal and sticky extensions are freed and extension array cleared. + void free_all_extensions(); + + //-------------- + // Destructor + //-------------- + virtual ~tlm_generic_payload(); + + //---------------- + // API (including setters & getters) + //--------------- + + // Command related method + bool is_read() const {return (m_command == TLM_READ_COMMAND);} + void set_read() {m_command = TLM_READ_COMMAND;} + bool is_write() const {return (m_command == TLM_WRITE_COMMAND);} + void set_write() {m_command = TLM_WRITE_COMMAND;} + tlm_command get_command() const {return m_command;} + void set_command(const tlm_command command) {m_command = command;} + + // Address related methods + sc_dt::uint64 get_address() const {return m_address;} + void set_address(const sc_dt::uint64 address) {m_address = address;} + + // Data related methods + unsigned char* get_data_ptr() const {return m_data;} + void set_data_ptr(unsigned char* data) {m_data = data;} + + // Transaction length (in bytes) related methods + unsigned int get_data_length() const {return m_length;} + void set_data_length(const unsigned int length) {m_length = length;} + + // Response status related methods + bool is_response_ok() const {return (m_response_status > 0);} + bool is_response_error() const {return (m_response_status <= 0);} + tlm_response_status get_response_status() const {return m_response_status;} + void set_response_status(const tlm_response_status response_status) + {m_response_status = response_status;} + std::string get_response_string() const; + + // Streaming related methods + unsigned int get_streaming_width() const {return m_streaming_width;} + void set_streaming_width(const unsigned int streaming_width) {m_streaming_width = streaming_width; } + + // Byte enable related methods + unsigned char* get_byte_enable_ptr() const {return m_byte_enable;} + void set_byte_enable_ptr(unsigned char* byte_enable){m_byte_enable = byte_enable;} + unsigned int get_byte_enable_length() const {return m_byte_enable_length;} + void set_byte_enable_length(const unsigned int byte_enable_length){m_byte_enable_length = byte_enable_length;} + + // This is the "DMI-hint" a slave can set this to true if it + // wants to indicate that a DMI request would be supported: + void set_dmi_allowed(bool dmi_allowed) { m_dmi = dmi_allowed; } + bool is_dmi_allowed() const { return m_dmi; } + + // Use full set of attributes in DMI/debug? + tlm_gp_option get_gp_option() const { return m_gp_option; } + void set_gp_option( const tlm_gp_option gp_opt ) { m_gp_option = gp_opt; } + +private: + + /* --------------------------------------------------------------------- */ + /* Generic Payload attributes: */ + /* --------------------------------------------------------------------- */ + /* - m_command : Type of transaction. Three values supported: */ + /* - TLM_WRITE_COMMAND */ + /* - TLM_READ_COMMAND */ + /* - TLM_IGNORE_COMMAND */ + /* - m_address : Transaction base address (byte-addressing). */ + /* - m_data : When m_command = TLM_WRITE_COMMAND contains a */ + /* pointer to the data to be written in the target.*/ + /* When m_command = TLM_READ_COMMAND contains a */ + /* pointer where to copy the data read from the */ + /* target. */ + /* - m_length : Total number of bytes of the transaction. */ + /* - m_response_status : This attribute indicates whether an error has */ + /* occurred during the transaction. */ + /* Values supported are: */ + /* - TLM_OK_RESP */ + /* - TLM_INCOMPLETE_RESP */ + /* - TLM_GENERIC_ERROR_RESP */ + /* - TLM_ADDRESS_ERROR_RESP */ + /* - TLM_COMMAND_ERROR_RESP */ + /* - TLM_BURST_ERROR_RESP */ + /* - TLM_BYTE_ENABLE_ERROR_RESP */ + /* */ + /* - m_byte_enable : It can be used to create burst transfers where */ + /* the address increment between each beat is greater */ + /* than the word length of each beat, or to place */ + /* words in selected byte lanes of a bus. */ + /* - m_byte_enable_length : For a read or a write command, the target */ + /* interpret the byte enable length attribute as the */ + /* number of elements in the bytes enable array. */ + /* - m_streaming_width : */ + /* --------------------------------------------------------------------- */ + + sc_dt::uint64 m_address; + tlm_command m_command; + unsigned char* m_data; + unsigned int m_length; + tlm_response_status m_response_status; + bool m_dmi; + unsigned char* m_byte_enable; + unsigned int m_byte_enable_length; + unsigned int m_streaming_width; + tlm_gp_option m_gp_option; + +public: + + /* --------------------------------------------------------------------- */ + /* Dynamic extension mechanism: */ + /* --------------------------------------------------------------------- */ + /* The extension mechanism is intended to enable initiator modules to */ + /* optionally and transparently add data fields to the */ + /* tlm_generic_payload. Target modules are free to check for extensions */ + /* and may or may not react to the data in the extension fields. The */ + /* definition of the extensions' semantics is solely in the */ + /* responsibility of the user. */ + /* */ + /* The following rules apply: */ + /* */ + /* - Every extension class must be derived from tlm_extension, e.g.: */ + /* class my_extension : public tlm_extension<my_extension> { ... } */ + /* */ + /* - A tlm_generic_payload object should be constructed after C++ */ + /* static initialization time. This way it is guaranteed that the */ + /* extension array is of sufficient size to hold all possible */ + /* extensions. Alternatively, the initiator module can enforce a valid */ + /* extension array size by calling the resize_extensions() method */ + /* once before the first transaction with the payload object is */ + /* initiated. */ + /* */ + /* - Initiators should use the the set_extension(e) or clear_extension(e)*/ + /* methods for manipulating the extension array. The type of the */ + /* argument must be a pointer to the specific registered extension */ + /* type (my_extension in the above example) and is used to */ + /* automatically locate the appropriate index in the array. */ + /* */ + /* - Targets can check for a specific extension by calling */ + /* get_extension(e). e will point to zero if the extension is not */ + /* present. */ + /* */ + /* --------------------------------------------------------------------- */ + + // Stick the pointer to an extension into the vector, return the + // previous value: + template <typename T> T* set_extension(T* ext) + { + return static_cast<T*>(set_extension(T::ID, ext)); + } + + // non-templatized version with manual index: + tlm_extension_base* set_extension(unsigned int index, + tlm_extension_base* ext); + + // Stick the pointer to an extension into the vector, return the + // previous value and schedule its release + template <typename T> T* set_auto_extension(T* ext) + { + return static_cast<T*>(set_auto_extension(T::ID, ext)); + } + + // non-templatized version with manual index: + tlm_extension_base* set_auto_extension(unsigned int index, + tlm_extension_base* ext); + + // Check for an extension, ext will point to 0 if not present + template <typename T> void get_extension(T*& ext) const + { + ext = get_extension<T>(); + } + template <typename T> T* get_extension() const + { + return static_cast<T*>(get_extension(T::ID)); + } + // Non-templatized version with manual index: + tlm_extension_base* get_extension(unsigned int index) const; + + //this call just removes the extension from the txn but does not + // call free() or tells the MM to do so + // it return false if there was active MM so you are now in an unsafe situation + // recommended use: when 100% sure there is no MM + template <typename T> void clear_extension(const T* ext) + { + clear_extension<T>(); + } + + //this call just removes the extension from the txn but does not + // call free() or tells the MM to do so + // it return false if there was active MM so you are now in an unsafe situation + // recommended use: when 100% sure there is no MM + template <typename T> void clear_extension() + { + clear_extension(T::ID); + } + + //this call removes the extension from the txn and does + // call free() or tells the MM to do so when the txn is finally done + // recommended use: when not sure there is no MM + template <typename T> void release_extension(T* ext) + { + release_extension<T>(); + } + + //this call removes the extension from the txn and does + // call free() or tells the MM to do so when the txn is finally done + // recommended use: when not sure there is no MM + template <typename T> void release_extension() + { + release_extension(T::ID); + } + +private: + // Non-templatized version with manual index + void clear_extension(unsigned int index); + // Non-templatized version with manual index + void release_extension(unsigned int index); + +public: + // Make sure the extension array is large enough. Can be called once by + // an initiator module (before issuing the first transaction) to make + // sure that the extension array is of correct size. This is only needed + // if the initiator cannot guarantee that the generic payload object is + // allocated after C++ static construction time. + void resize_extensions(); + +private: + tlm_array<tlm_extension_base*> m_extensions; + tlm_mm_interface* m_mm; + unsigned int m_ref_count; +}; + +} // namespace tlm + + +#endif /* TLM_CORE_TLM2_TLM_GP_H_INCLUDED_ */ |