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////////////////////////////////////////////////////////////////////////////////
//
// Filename: ramscope.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 SDRAM interaction.
//
//
// Creator: Dan Gisselquist, Ph.D.
// Gisselquist Technology, LLC
//
////////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015,2017, 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
// <http://www.gnu.org/licenses/> for a copy.
//
// License: GPL, v3, as defined and found on www.gnu.org,
// http://www.gnu.org/licenses/gpl.html
//
//
////////////////////////////////////////////////////////////////////////////////
//
//
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <strings.h>
#include <ctype.h>
#include <string.h>
#include <signal.h>
#include <assert.h>
#include "usbi.h"
#include "port.h"
#include "llcomms.h"
#include "regdefs.h"
#define WBSCOPE R_RAMSCOPE
#define WBSCOPEDATA R_RAMSCOPED
FPGA *m_fpga;
void closeup(int v) {
m_fpga->kill();
exit(0);
}
unsigned brev(const unsigned v) {
unsigned int r, a;
a = v;
r = 0;
for(int i=0; i<8; i++) {
r <<= 1;
r |= (a&1);
a >>= 1;
} return r;
}
unsigned wrev(const unsigned v) {
unsigned r = brev(v&0x0ff);
r |= brev((v>>8)&0x0ff)<<8;
return r;
}
int main(int argc, char **argv) {
bool skipping = false;
unsigned v, lgln, scoplen;
DEVBUS::BUSW *buf;
FPGAOPEN(m_fpga);
signal(SIGSTOP, closeup);
signal(SIGHUP, closeup);
printf("Attempting to read address %08x\n", WBSCOPE);
v = m_fpga->readio(WBSCOPE);
if (0x60000000 != (v & 0x60000000)) {
printf("Scope is not yet ready:\n");
printf("\tRESET:\t\t%s\n", (v&0x80000000)?"Ongoing":"Complete");
printf("\tSTOPPED:\t%s\n", (v&0x40000000)?"Yes":"No");
printf("\tTRIGGERED:\t%s\n", (v&0x20000000)?"Yes":"No");
printf("\tPRIMED:\t\t%s\n", (v&0x10000000)?"Yes":"No");
printf("\tMANUAL:\t\t%s\n", (v&0x08000000)?"Yes":"No");
printf("\tDISABLED:\t%s\n", (v&0x04000000)?"Yes":"No");
printf("\tZERO:\t\t%s\n", (v&0x02000000)?"Yes":"No");
exit(0);
} else printf("SCOPD = %08x\n", v);
lgln = (v>>20) & 0x1f;
scoplen = (1<<lgln);
buf = new DEVBUS::BUSW[scoplen];
if (false) {
printf("Attempting vector read\n");
m_fpga->readz(WBSCOPEDATA, scoplen, buf);
printf("Vector read complete\n");
} else {
for(unsigned int i=0; i<scoplen; i++)
buf[i] = m_fpga->readio(WBSCOPEDATA);
}
for(unsigned int i=0; i<scoplen; i++) {
int cmd;
if ((i>0)&&(buf[i] == buf[i-1])&&
(i<scoplen-1)&&(buf[i] == buf[i+1])) {
if (!skipping)
printf(" ****\n");
skipping = true;
continue;
} skipping = false;
printf("%6d %08x:", i, buf[i]);
printf("S(%x) ", (buf[i]>>27)&0x0f);
if (buf[i] & 0x20000000)
printf("W "); else printf("R ");
printf("WB(%s%s%s%s%s",
(buf[i]&0x80000000)?"CYC":" ",
(buf[i]&0x40000000)?"STB":" ",
(buf[i]&0x20000000)?"WE":" ",
(buf[i]&0x10000000)?"ACK":" ",
(buf[i]&0x08000000)?"STL":" ");
//
if ((buf[i]&0xc8000000)==0xc0000000)
printf("*");
else
printf(" ");
printf(")-SD[%d%d%d%d,%d]",
(buf[i]&0x04000000)?1:0,
(buf[i]&0x02000000)?1:0,
(buf[i]&0x01000000)?1:0,
(buf[i]&0x00800000)?1:0,
(buf[i]&0x00600000)>>21);
cmd = (buf[i] >> 23)&0x0f;
if (buf[i]&0x00100000)
printf("<- ");
else
printf("-> ");
printf("%s", (buf[i]&0x00080000)?"P":" "); // Pending
printf("@%3x,", (buf[i]>>8)&0x07ff);
/*
printf(",%s%s%s%s%s",
(buf[i]&0x080)?"R":"-",
(buf[i]&0x040)?"P":".",
(buf[i]&0x020)?"P":".",
(buf[i]&0x010)?"P":".",
(buf[i]&0x008)?"P":".");
printf("/%x%x%x",
(buf[i]>>2)&0x01,
(buf[i]>>1)&0x01,
(buf[i]&0x01));
*/
printf("/%02x ", buf[i] & 0x0ff);
if (cmd & 0x8)
printf("(inactive)");
switch(cmd) {
case 0x01: printf("Refresh"); break;
case 0x02: printf("Precharge"); break;
case 0x03: printf("Activate"); break;
case 0x04: printf("Write"); break;
case 0x05: printf("Read"); break;
case 0x07: printf("NoOp"); break;
default: break;
}
printf("\n");
}
if (m_fpga->poll()) {
printf("FPGA was interrupted\n");
m_fpga->clear();
m_fpga->writeio(R_ICONTROL, SCOPEN);
}
delete m_fpga;
}