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/*****************************************************************************
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.
*****************************************************************************/
/*****************************************************************************
bios.h -- System Bios Unit.
Original Author: Martin Wang, Synopsys, Inc.
*****************************************************************************/
/*****************************************************************************
MODIFICATION LOG - modifiers, enter your name, affiliation, date and
changes you are making here.
Name, Affiliation, Date:
Description of Modification:
*****************************************************************************/
#define BOOT_LENGTH 5
struct bios : sc_module {
sc_in<unsigned > datain; // modified instruction
sc_in<bool> cs; // chip select
sc_in<bool> we; // write enable for SMC
sc_in<unsigned > addr; // physical address
sc_out<unsigned > dataout; // ram data out
sc_out<bool> bios_valid; // out valid
sc_out<bool> stall_fetch; // stall fetch if output not valid
sc_in_clk CLK;
// Parameter
unsigned *imemory; // BIOS program data memory
unsigned *itagmemory; // program tag memory (NOT USED)
int wait_cycles; // Cycle # it takes to access memory
void init_param(int given_delay_cycles) {
wait_cycles = given_delay_cycles;
}
//Constructor
SC_CTOR(bios) {
SC_CTHREAD(entry, CLK.pos());
// initialize instruction imemory from external file
FILE *fp = fopen("bios.img","r");
int size=0;
unsigned mem_word;
imemory = new unsigned[4000];
itagmemory = new unsigned[4000];
printf("** ALERT ** BIOS: initialize BIOS\n");
for (size = 0; size < 4000; size++) { // initialize bad data
imemory[size] = 0xffffffff;
itagmemory[size] = 0xffffffff;
}
size = 0;
while (fscanf(fp,"%x\n", &mem_word) != EOF) {
imemory[size] = mem_word;
itagmemory[size] = size;
size++;
}
}
// Process functionality in member function below
void entry();
};
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