Scratchpad< T, N, CAPACITY_IN_BYTES > Class Template Reference

Parameterized banked scratchpad memory. More...

#include <Scratchpad.h>

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

Classes
struct	bank_req_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
mem_array_sep< T, CAPACITY_IN_BYTES, N >	banks
bank_req_t	input_reqs [N]
bool	input_reqs_valid [N]
bank_req_t	bank_reqs [N]
bool	bank_reqs_valid [N]
T	bank_rsps_data [N]
bool	bank_rsps_valid [N]
bool	load_rsps_valid [N]
cli_req_t< T, ADDR_WIDTH, N >	curr_cli_req
cli_rsp_t< T, N >	load_rsp
bank_sel_t	bank_src_lane [N]
bank_sel_t	bank_dst_lane [N]

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

Detailed Description

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

Parameterized banked scratchpad memory.

Template Parameters

T	EntryType
N	Number of requests
CAPACITY_IN_BYTES

Overview

-Assumptions: All N requests are guaranteed conflict-free.

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

Input parameters: Number of banks (assumed to be same as the number of requests) Address Width

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,SCRATCHPAD_CAPACITY> 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 87 of file Scratchpad.h.

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

• Scratchpad.h