Scratchpad< T, N, CAPACITY_IN_WORDS > Class Template Reference

Parameterized banked scratchpad memory implemented as a SystemC module. More...

#include <Scratchpad.h>

Inheritance diagram for Scratchpad< T, N, CAPACITY_IN_WORDS >:

Classes
struct	bank_req_t

Public Types
typedef cli_req_t< T, ADDR_WIDTH, N >	req_t
typedef cli_rsp_t< T, N >	rsp_t

Public Member Functions
typedef	NVUINTW (NBANKS_LOG2) bank_sel_t
typedef	NVUINTW (ADDR_WIDTH - NBANKS_LOG2) bank_addr_t
	SC_HAS_PROCESS (Scratchpad)
	Scratchpad (sc_module_name name_)
void	run ()

Public Attributes
sc_in_clk	clk
sc_in< bool >	rst
Connections::In< cli_req_t< T, ADDR_WIDTH, N > >	cli_req
Connections::Out< cli_rsp_t< T, N > >	cli_rsp
ScratchpadClass< T, N, CAPACITY_IN_WORDS >	scratchpad_class

Static Public Attributes
static const int	ADDR_WIDTH = nvhls::nbits<CAPACITY_IN_WORDS - 1>::val
static const int	NBANKS_LOG2 = nvhls::nbits<N - 1>::val

Detailed Description

template<typename T, int N, int CAPACITY_IN_WORDS>
class Scratchpad< T, N, CAPACITY_IN_WORDS >

Parameterized banked scratchpad memory implemented as a SystemC module.

Template Parameters

T	EntryType
N	Number of requests
CAPACITY_IN_WORDS	Total number of words of type T in memory

Overview

-Assumptions: All N requests are guaranteed conflict-free. An assertion message will be emitted if there are any bank conflicts.

Ports: 1 input port for requests (load OR store) from client 1 output port for responses (load only) back to client

A Simple Example

#include <Scratchpad.h>
 
...
Connections::In< cli_req_t<data32_t, ADDR_WIDTH,N> > cli_req;
Connections::Out< cli_rsp_t<data32_t, N> > cli_rsp;
Scratchpad<data32_t, SCRATCHPAD_BANKS, CAPACITY_IN_WORDS> myscratchpad;
...
  // Connect the DUT
  myscratchpad.clk(clk);
  myscratchpad.rst(rst);
  myscratchpad.cli_req(cli_req);
  myscratchpad.cli_rsp(cli_rsp);
...

Usage Guidelines

This module sets the stall mode to flush by default to mitigate possible RTL bugs that can occur in the default stall mode. If you are confident that this class of bugs will not occur in your use case, you can change the stall mode via TCL directive:

directive set /path/to/Scratchpad/run/while -PIPELINE_STALL_MODE stall

This may reduce area/power.

Definition at line 259 of file Scratchpad.h.

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The documentation for this class was generated from the following file:

• Scratchpad.h