////////////////////////////////////////////////////////////////////////////////
//
// Filename: cpuscope.cpp
//
// Project: XuLA2-LX25 SoC based upon the ZipCPU
//
// Purpose: To read out, and decompose, the results of the wishbone scope
// as applied to the ZipCPU internal operation.
//
// Creator: Dan Gisselquist, Ph.D.
// Gisselquist Technology, LLC
//
////////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015-2016, Gisselquist Technology, LLC
//
// This program is free software (firmware): you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program. (It's in the $(ROOT)/doc directory, run make with no
// target there if the PDF file isn't present.) If not, see
// for a copy.
//
// License: GPL, v3, as defined and found on www.gnu.org,
// http://www.gnu.org/licenses/gpl.html
//
//
////////////////////////////////////////////////////////////////////////////////
//
//
#include
#include
#include
#include
#include
#include
#include
#include
#include "port.h"
#include "llcomms.h"
#include "regdefs.h"
#include "scopecls.h"
#define WBSCOPE R_CPUSCOPE
#define WBSCOPEDATA R_CPUSCOPED
FPGA *m_fpga;
void closeup(int v) {
m_fpga->kill();
exit(0);
}
const char *regstr[] = {
"R0","R1","R2","R3","R4","R5","R6","R7","R8","R9","RA","RB","RC",
"SP","CC","PC"
};
class CPUSCOPE : public SCOPE {
public:
CPUSCOPE(FPGA *fpga, unsigned addr, bool vecread)
: SCOPE(fpga, addr, false, false) {};
~CPUSCOPE(void) {}
virtual void decode(DEVBUS::BUSW val) const {
if (val & 0x80000000)
printf("TRIG ");
else
printf(" ");
if ((val & 0x40000000)==0) {
printf("%s <- 0x.%08x", regstr[(val>>32-6)&0xf], val&0x03ffffff);
} else if ((val & 0x60000000)==0x60000000) {
if (val&0x08000000)
printf("MEM-W[0x........] <- 0x.%07x %s",
(val&0x07ffffff),
(val&0x10000000)?"(GBL)":"");
else
printf("MEM-R[0x.%07x] -> (Not Givn) %s",
(val&0x07ffffff),
(val&0x10000000)?"(GBL)":"");
} else if ((val & 0x70000000)==0x40000000)
printf("JMP 0x%08x", (val&0x0fffffff));
else {
int master, halt, brk, sleep, gie, buserr, trap,
ill, clri, pfv, pfi, dcdce, dcdv, dcdstall,
opce, opvalid, oppipe, aluce, alubsy, aluwr,
aluill, aluwrf, memce, memwe, membsy;
master = (val>>27)&1;
halt = (val>>26)&1;
brk = (val>>25)&1;
sleep = (val>>24)&1;
gie = (val>>23)&1;
buserr = (val>>22)&1;
trap = (val>>21)&1;
ill = (val>>20)&1;
clri = (val>>19)&1;
pfv = (val>>18)&1;
pfi = (val>>17)&1;
dcdce = (val>>16)&1;
dcdv = (val>>15)&1;
dcdstall=(val>>14)&1;
opce = (val>>13)&1;
opvalid= (val>>12)&1;
oppipe = (val>>11)&1;
aluce = (val>>10)&1;
alubsy = (val>> 9)&1;
aluwr = (val>> 8)&1;
aluill = (val>> 7)&1;
aluwrf = (val>> 6)&1;
memce = (val>> 5)&1;
memwe = (val>> 4)&1;
membsy = (val>> 3)&1;
printf("FLAGS %08x", val);
printf(" CE[%c%c%c%c]",
(dcdce)?'D':' ',
(opce)?'O':' ',
(aluce)?'A':' ',
(memce)?'M':' ');
printf(" V[%c%c%c%c]",
(pfv)?'P':' ',
(dcdv)?'D':' ',
(opvalid)?'O':' ',
(aluwr)?'A':' ');
if (master) printf(" MCE");
if (halt) printf(" I-HALT");
if (brk) printf(" O-BREAK");
if (sleep) printf(" SLP");
if (GIE) printf(" GIE");
if (buserr) printf(" BE");
if (trap) printf(" TRAP");
if (ill) printf(" ILL");
if (clri) printf(" CLR-I");
if (pfi) printf(" PF-ILL");
if (dcdstall)printf(" DCD-STALL");
if (oppipe) printf(" OP-PIPE");
if (alubsy) printf(" ALU-BUSY");
if (memwe) printf(" MEM-WE");
if (membsy) printf(" MEM-BUSY");
//
}
}
};
int main(int argc, char **argv) {
FPGAOPEN(m_fpga);
signal(SIGSTOP, closeup);
signal(SIGHUP, closeup);
CPUSCOPE *scope = new CPUSCOPE(m_fpga, WBSCOPE, false);
if (!scope->ready()) {
printf("Scope is not yet ready:\n");
scope->decode_control();
scope->decode(WBSCOPEDATA);
printf("\n");
} else
scope->read();
delete m_fpga;
}
