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    /or1k/tags/stable_0_2_0_rc1/or1ksim/debug
    from Rev 1572 to Rev 1765
    Reverse comparison

Rev 1572 → Rev 1765

/debug_unit.c
0,0 → 1,459
/* debug_unit.c -- Simulation of Or1k debug unit
Copyright (C) 2001 Chris Ziomkowski, chris@asics.ws
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
This program is free software; 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 2 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
MERCHANTABILITY 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; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
/*
This is an architectural level simulation of the Or1k debug
unit as described in OpenRISC 1000 System Architecture Manual,
v. 0.1 on 22 April, 2001. This unit is described in Section 13.
 
Every attempt has been made to be as accurate as possible with
respect to the registers and the behavior. There are no known
limitations at this time.
*/
 
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
 
#include "config.h"
 
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
 
#include "port.h"
#include "arch.h"
#include "debug_unit.h"
#include "sim-config.h"
#include "except.h"
#include "abstract.h"
#include "parse.h"
#include "gdb.h"
#include "except.h"
#include "opcode/or32.h"
#include "spr_defs.h"
#include "execute.h"
#include "sprs.h"
#include "debug.h"
 
DECLARE_DEBUG_CHANNEL(jtag);
 
DevelopmentInterface development;
 
/* External STALL signal to debug interface */
int in_reset = 0;
 
/* Current watchpoint state */
unsigned long watchpoints = 0;
 
static int calculate_watchpoints(DebugUnitAction action, unsigned long udata);
 
void set_stall_state(int state)
{
#if DYNAMIC_EXECUTION
if(state)
PRINTF("FIXME: Emulating a stalled cpu not implemented (in the dynamic execution model)\n");
#endif
development.riscop &= ~RISCOP_STALL;
development.riscop |= state ? RISCOP_STALL : 0;
if(cpu_state.sprs[SPR_DMR1] & SPR_DMR1_DXFW) /* If debugger disabled */
state = 0;
runtime.cpu.stalled = state;
}
 
void du_reset(void)
{
development.riscop = 0;
set_stall_state (0);
}
 
void du_clock(void)
{
watchpoints=0;
};
 
int CheckDebugUnit(DebugUnitAction action, unsigned long udata)
{
/* Do not stop, if we have debug module disabled or during reset */
if(!config.debug.enabled || in_reset)
return 0;
/* If we're single stepping, always stop */
if((action == DebugInstructionFetch) && (cpu_state.sprs[SPR_DMR1] & SPR_DMR1_ST))
return 1;
 
/* is any watchpoint enabled to generate a break or count? If not, ignore */
if(cpu_state.sprs[SPR_DMR2] & (SPR_DMR2_WGB | SPR_DMR2_AWTC))
return calculate_watchpoints(action, udata);
 
return 0;
}
 
/* Checks whether we should stall the RISC or cause an exception */
static int calculate_watchpoints(DebugUnitAction action, unsigned long udata)
{
int breakpoint = 0;
int i, bit;
 
/* Hopefully this loop would be unrolled run at max. speed */
for(i = 0, bit = 1; i < 11; i++, bit <<= 1) {
int chain1, chain2;
int match = 0;
int DCR_hit = 0;
 
/* Calculate first 8 matchpoints, result is put into DCR_hit */
if (i < 8) {
unsigned long dcr = cpu_state.sprs[SPR_DCR(i)];
unsigned long dcr_ct = dcr & SPR_DCR_CT; /* the CT field alone */
/* Is this matchpoint a propos for the current action? */
if ( ((dcr & SPR_DCR_DP) && dcr_ct) && /* DVR/DCP pair present */
(((action==DebugInstructionFetch) && (dcr_ct == SPR_DCR_CT_IFEA)) ||
((action==DebugLoadAddress) && ((dcr_ct == SPR_DCR_CT_LEA) ||
(dcr_ct == SPR_DCR_CT_LSEA))) ||
((action==DebugStoreAddress) && ((dcr_ct == SPR_DCR_CT_SEA) ||
(dcr_ct == SPR_DCR_CT_LSEA))) ||
((action==DebugLoadData) && ((dcr_ct == SPR_DCR_CT_LD) ||
(dcr_ct == SPR_DCR_CT_LSD))) ||
((action==DebugStoreData) && ((dcr_ct == SPR_DCR_CT_SD) ||
(dcr_ct == SPR_DCR_CT_LSD)))) ) {
unsigned long op1 = udata;
unsigned long op2 = cpu_state.sprs[SPR_DVR(i)];
/* Perform signed comparison? */
if (dcr & SPR_DCR_SC) {
long sop1 = op1, sop2 = op2; /* Convert to signed */
switch(dcr & SPR_DCR_CC) {
case SPR_DCR_CC_MASKED: DCR_hit = sop1 & sop2; break;
case SPR_DCR_CC_EQUAL: DCR_hit = sop1 == sop2; break;
case SPR_DCR_CC_NEQUAL: DCR_hit = sop1 != sop2; break;
case SPR_DCR_CC_LESS: DCR_hit = sop1 < sop2; break;
case SPR_DCR_CC_LESSE: DCR_hit = sop1 <= sop2; break;
case SPR_DCR_CC_GREAT: DCR_hit = sop1 > sop2; break;
case SPR_DCR_CC_GREATE: DCR_hit = sop1 >= sop2; break;
}
} else {
switch(dcr & SPR_DCR_CC) {
case SPR_DCR_CC_MASKED: DCR_hit = op1 & op2; break;
case SPR_DCR_CC_EQUAL: DCR_hit = op1 == op2; break;
case SPR_DCR_CC_NEQUAL: DCR_hit = op1 != op2; break;
case SPR_DCR_CC_LESS: DCR_hit = op1 < op2; break;
case SPR_DCR_CC_LESSE: DCR_hit = op1 <= op2; break;
case SPR_DCR_CC_GREAT: DCR_hit = op1 > op2; break;
case SPR_DCR_CC_GREATE: DCR_hit = op1 >= op2; break;
}
}
}
}
 
/* Chain matchpoints */
switch(i) {
case 0:
chain1 = chain2 = DCR_hit;
break;
case 8:
chain1 = (cpu_state.sprs[SPR_DWCR0] & SPR_DWCR_COUNT) ==
(cpu_state.sprs[SPR_DWCR0] & SPR_DWCR_MATCH);
chain2 = watchpoints & (1 << 7);
break;
case 9:
chain1 = (cpu_state.sprs[SPR_DWCR1] & SPR_DWCR_COUNT) ==
(cpu_state.sprs[SPR_DWCR1] & SPR_DWCR_MATCH);
chain2 = watchpoints & (1 << 8);
break;
case 10:
/* TODO: External watchpoint - not yet handled! */
#if 0
chain1 = external_watchpoint;
chain2 = watchpoints & (1 << 9);
#else
chain1 = chain2 = 0;
#endif
break;
default:
chain1 = DCR_hit;
chain2 = watchpoints & (bit >> 1);
break;
}
 
switch((cpu_state.sprs[SPR_DMR1] >> i) & SPR_DMR1_CW0) {
case 0: match = chain1; break;
case 1: match = chain1 && chain2; break;
case 2: match = chain1 || chain2; break;
}
 
/* Increment counters & generate counter break */
if(match) {
/* watchpoint did not appear before in this clock cycle */
if(!(watchpoints & bit)) {
int counter = (((cpu_state.sprs[SPR_DMR2] & SPR_DMR2_AWTC) >> 2) & bit) ? 1 : 0;
int enabled = cpu_state.sprs[SPR_DMR2] & (counter ? SPR_DMR2_WCE1 : SPR_DMR2_WCE0);
if(enabled) {
uorreg_t count = cpu_state.sprs[SPR_DWCR0 + counter];
count = (count & ~SPR_DWCR_COUNT) | ((count & SPR_DWCR_COUNT) + 1);
cpu_state.sprs[SPR_DWCR0 + counter] = count;
}
watchpoints |= bit;
}
 
/* should this watchpoint generate a breakpoint? */
if(((cpu_state.sprs[SPR_DMR2] & SPR_DMR2_WGB) >> 13) & bit)
breakpoint = 1;
}
}
 
return breakpoint;
}
 
static DebugScanChainIDs current_scan_chain = JTAG_CHAIN_GLOBAL;
 
int DebugGetRegister(oraddr_t address, uorreg_t* data)
{
int err=0;
TRACE_(jtag)("Debug get register %x\n",address);
switch(current_scan_chain)
{
case JTAG_CHAIN_DEBUG_UNIT:
*data = mfspr(address);
TRACE_(jtag)("READ (%"PRIxADDR") = %"PRIxREG"\n", address, *data);
break;
case JTAG_CHAIN_TRACE:
*data = 0; /* Scan chain not yet implemented */
break;
case JTAG_CHAIN_DEVELOPMENT:
err = get_devint_reg(address,data);
break;
case JTAG_CHAIN_WISHBONE:
err = debug_get_mem(address,data);
break;
default:
err = JTAG_PROXY_INVALID_CHAIN;
}
TRACE_(jtag)("!get reg %"PRIxREG"\n", *data);
return err;
}
 
int DebugSetRegister(oraddr_t address, uorreg_t data)
{
int err=0;
TRACE_(jtag)("Debug set register %"PRIxADDR" <- %"PRIxREG"\n", address, data);
switch(current_scan_chain)
{
case JTAG_CHAIN_DEBUG_UNIT:
TRACE_(jtag)("WRITE (%"PRIxADDR") = %"PRIxREG"\n", address, data);
mtspr(address, data);
break;
case JTAG_CHAIN_TRACE:
err = JTAG_PROXY_ACCESS_EXCEPTION;
break;
case JTAG_CHAIN_DEVELOPMENT:
err = set_devint_reg (address, data);
break;
case JTAG_CHAIN_WISHBONE:
err = debug_set_mem (address, data);
break;
default:
err = JTAG_PROXY_INVALID_CHAIN;
}
TRACE_(jtag)("!set reg\n");
return err;
}
 
int DebugSetChain(int chain)
{
TRACE_(jtag)("Debug set chain %x\n",chain);
switch(chain)
{
case JTAG_CHAIN_DEBUG_UNIT:
case JTAG_CHAIN_TRACE:
case JTAG_CHAIN_DEVELOPMENT:
case JTAG_CHAIN_WISHBONE:
current_scan_chain = chain;
break;
default: /* All other chains not implemented */
return JTAG_PROXY_INVALID_CHAIN;
}
 
return 0;
}
 
void sim_reset ();
 
/* Sets development interface register */
int set_devint_reg(unsigned int address, uint32_t data)
{
int err = 0;
unsigned long value = data;
int old_value;
 
switch(address) {
case DEVELOPINT_MODER: development.moder = value; break;
case DEVELOPINT_TSEL: development.tsel = value; break;
case DEVELOPINT_QSEL: development.qsel = value; break;
case DEVELOPINT_SSEL: development.ssel = value; break;
case DEVELOPINT_RISCOP:
old_value = (development.riscop & RISCOP_RESET) != 0;
development.riscop = value;
in_reset = (development.riscop & RISCOP_RESET) != 0;
/* Reset the cpu on the negative edge of RESET */
if(old_value && !in_reset)
sim_reset(); /* Reset all units */
set_stall_state((development.riscop & RISCOP_STALL) != 0);
break;
case DEVELOPINT_RECWP0:
case DEVELOPINT_RECWP1:
case DEVELOPINT_RECWP2:
case DEVELOPINT_RECWP3:
case DEVELOPINT_RECWP4:
case DEVELOPINT_RECWP5:
case DEVELOPINT_RECWP6:
case DEVELOPINT_RECWP7:
case DEVELOPINT_RECWP8:
case DEVELOPINT_RECWP9:
case DEVELOPINT_RECWP10: development.recwp[address - DEVELOPINT_RECWP0] = value; break;
case DEVELOPINT_RECBP0: development.recbp = value; break;
default:
err = JTAG_PROXY_INVALID_ADDRESS;
break;
}
TRACE_(jtag)("set_devint_reg %08x = %"PRIx32"\n", address, data);
return err;
}
 
/* Gets development interface register */
int get_devint_reg(unsigned int address, uint32_t *data)
{
int err = 0;
unsigned long value = 0;
 
switch(address) {
case DEVELOPINT_MODER: value = development.moder; break;
case DEVELOPINT_TSEL: value = development.tsel; break;
case DEVELOPINT_QSEL: value = development.qsel; break;
case DEVELOPINT_SSEL: value = development.ssel; break;
case DEVELOPINT_RISCOP: value = development.riscop; break;
case DEVELOPINT_RECWP0:
case DEVELOPINT_RECWP1:
case DEVELOPINT_RECWP2:
case DEVELOPINT_RECWP3:
case DEVELOPINT_RECWP4:
case DEVELOPINT_RECWP5:
case DEVELOPINT_RECWP6:
case DEVELOPINT_RECWP7:
case DEVELOPINT_RECWP8:
case DEVELOPINT_RECWP9:
case DEVELOPINT_RECWP10: value = development.recwp[address - DEVELOPINT_RECWP0]; break;
case DEVELOPINT_RECBP0: value = development.recbp; break;
default: err = JTAG_PROXY_INVALID_ADDRESS; break;
}
 
TRACE_(jtag)("get_devint_reg %08x = %08lx\n", address, value);
*data = value;
return err;
}
 
/* Writes to bus address */
int debug_set_mem (oraddr_t address, uint32_t data)
{
int err = 0;
TRACE_(jtag)("MEMWRITE (%"PRIxADDR") = %"PRIx32"\n", address, data);
 
 
if(!verify_memoryarea(address))
err = JTAG_PROXY_INVALID_ADDRESS;
else {
// circumvent the read-only check usually done for mem accesses
// data is in host order, because that's what set_direct32 needs
set_program32(address, data);
}
return err;
}
 
/* Reads from bus address */
int debug_get_mem(oraddr_t address, uorreg_t *data)
{
int err = 0;
if(!verify_memoryarea(address))
err = JTAG_PROXY_INVALID_ADDRESS;
else
{
*data=eval_direct32(address, 0, 0);
}
TRACE_(jtag)("MEMREAD (%"PRIxADDR") = %"PRIxADDR"\n", address, *data);
return err;
}
 
/* debug_ignore_exception returns 1 if the exception should be ignored. */
int debug_ignore_exception (unsigned long except)
{
int result = 0;
unsigned long dsr = cpu_state.sprs[SPR_DSR];
unsigned long drr = cpu_state.sprs[SPR_DRR];
switch(except) {
case EXCEPT_RESET: drr |= result = dsr & SPR_DSR_RSTE; break;
case EXCEPT_BUSERR: drr |= result = dsr & SPR_DSR_BUSEE; break;
case EXCEPT_DPF: drr |= result = dsr & SPR_DSR_DPFE; break;
case EXCEPT_IPF: drr |= result = dsr & SPR_DSR_IPFE; break;
case EXCEPT_TICK: drr |= result = dsr & SPR_DSR_TTE; break;
case EXCEPT_ALIGN: drr |= result = dsr & SPR_DSR_AE; break;
case EXCEPT_ILLEGAL: drr |= result = dsr & SPR_DSR_IIE; break;
case EXCEPT_INT: drr |= result = dsr & SPR_DSR_IE; break;
case EXCEPT_DTLBMISS: drr |= result = dsr & SPR_DSR_DME; break;
case EXCEPT_ITLBMISS: drr |= result = dsr & SPR_DSR_IME; break;
case EXCEPT_RANGE: drr |= result = dsr & SPR_DSR_RE; break;
case EXCEPT_SYSCALL: drr |= result = dsr & SPR_DSR_SCE; break;
case EXCEPT_TRAP: drr |= result = dsr & SPR_DSR_TE; break;
default:
break;
}
 
cpu_state.sprs[SPR_DRR] = drr;
set_stall_state (result != 0);
return (result != 0);
}
 
/*--------------------------------------------------[ Debug configuration ]---*/
void debug_enabled(union param_val val, void *dat)
{
config.debug.enabled = val.int_val;
}
 
void debug_gdb_enabled(union param_val val, void *dat)
{
config.debug.gdb_enabled = val.int_val;
}
 
void debug_server_port(union param_val val, void *dat)
{
config.debug.server_port = val.int_val;
}
 
void debug_vapi_id(union param_val val, void *dat)
{
config.debug.vapi_id = val.int_val;
}
 
void reg_debug_sec(void)
{
struct config_section *sec = reg_config_sec("debug", NULL, NULL);
 
reg_config_param(sec, "enabled", paramt_int, debug_enabled);
reg_config_param(sec, "gdb_enabled", paramt_int, debug_gdb_enabled);
reg_config_param(sec, "server_port", paramt_int, debug_server_port);
reg_config_param(sec, "vapi_id", paramt_int, debug_vapi_id);
}
debug_unit.c Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: gdbcomm.c =================================================================== --- gdbcomm.c (nonexistent) +++ gdbcomm.c (revision 1765) @@ -0,0 +1,671 @@ +/* gdbcomm.c -- Communication routines for gdb + Copyright (C) 2001 by Marko Mlinar, markom@opencores.org + Code copied from toplevel.c + + This file is part of OpenRISC 1000 Architectural Simulator. + + This program is free software; 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 2 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 + MERCHANTABILITY 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; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "config.h" + +#ifdef HAVE_INTTYPES_H +#include +#endif + +#include "port.h" +#include "arch.h" +#include "gdb.h" +#include "gdbcomm.h" +#include "vapi.h" +#include "sim-config.h" +#include "debug_unit.h" + +static int gdb_read(void* buf,int len); +static int gdb_write(const void* buf,int len); + +static unsigned int serverIP = 0; +static unsigned int serverPort = 0; +static unsigned int server_fd = 0; +static unsigned int gdb_fd = 0; + +static int tcp_level = 0; + +/* Added by CZ 24/05/01 */ +int GetServerSocket(const char* name,const char* proto,int port) +{ + struct servent *service; + struct protoent *protocol; + struct sockaddr_in sa; + struct hostent *hp; + int sockfd; + char myname[256]; + int flags; + char sTemp[256]; + socklen_t len; + + /* First, get the protocol number of TCP */ + if(!(protocol = getprotobyname(proto))) + { + sprintf(sTemp,"Unable to load protocol \"%s\"",proto); + perror(sTemp); + return 0; + } + tcp_level = protocol->p_proto; /* Save for later */ + + /* If we weren't passed a non standard port, get the port + from the services directory. */ + if(!port) + { + if((service = getservbyname(name,protocol->p_name))) + port = ntohs(service->s_port); + } + + /* Create the socket using the TCP protocol */ + if((sockfd = socket(PF_INET,SOCK_STREAM,protocol->p_proto)) < 0) + { + perror("Unable to create socket"); + return 0; + } + + flags = 1; + if(setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,(const char*)&flags,sizeof(int)) < 0) + { + sprintf(sTemp,"Can not set SO_REUSEADDR option on socket %d",sockfd); + perror(sTemp); + close(sockfd); + return 0; + } + + /* The server should also be non blocking. Get the current flags. */ + if(fcntl(sockfd,F_GETFL,&flags) < 0) + { + sprintf(sTemp,"Unable to get flags for socket %d",sockfd); + perror(sTemp); + close(sockfd); + return 0; + } + + /* Set the nonblocking flag */ + if(fcntl(sockfd,F_SETFL, flags | O_NONBLOCK) < 0) + { + sprintf(sTemp,"Unable to set flags for socket %d to value 0x%08x", + sockfd,flags | O_NONBLOCK); + perror(sTemp); + close(sockfd); + return 0; + } + + /* Find out what our address is */ + memset(&sa,0,sizeof(struct sockaddr_in)); + gethostname(myname,sizeof(myname)); + if(!(hp = gethostbyname(myname))) + { + perror("Unable to read hostname"); + close(sockfd); + return 0; + } + + /* Bind our socket to the appropriate address */ + sa.sin_family = hp->h_addrtype; + sa.sin_port = htons(port); + if(bind(sockfd,(struct sockaddr*)&sa,sizeof(struct sockaddr_in)) < 0) + { + sprintf(sTemp,"Unable to bind socket %d to port %d",sockfd,port); + perror(sTemp); + close(sockfd); + return 0; + } + serverIP = sa.sin_addr.s_addr; + len = sizeof(struct sockaddr_in); + if(getsockname(sockfd,(struct sockaddr*)&sa,&len) < 0) + { + sprintf(sTemp,"Unable to get socket information for socket %d",sockfd); + perror(sTemp); + close(sockfd); + return 0; + } + serverPort = ntohs(sa.sin_port); + + /* Set the backlog to 1 connections */ + if(listen(sockfd,1) < 0) + { + sprintf(sTemp,"Unable to set backlog on socket %d to %d",sockfd,1); + perror(sTemp); + close(sockfd); + return 0; + } + + return sockfd; +} + +void BlockJTAG(void) +{ + struct pollfd fds[2]; + int n = 0; + + fds[n].fd = server_fd; + fds[n].events = POLLIN; + fds[n++].revents = 0; + if(gdb_fd) + { + fds[n].fd = gdb_fd; + fds[n].events = POLLIN; + fds[n++].revents = 0; + } + poll(fds,n,-1); +} + +void HandleServerSocket(Boolean block) +{ + struct pollfd fds[3]; + int n = 0; + int timeout = block ? -1 : 0; + Boolean data_on_stdin = false; + int o_serv_fd = server_fd; + + if(!o_serv_fd && !gdb_fd) + return; + + if(o_serv_fd) + { + fds[n].fd = o_serv_fd; + fds[n].events = POLLIN; + fds[n++].revents = 0; + } + if(gdb_fd) + { + fds[n].fd = gdb_fd; + fds[n].events = POLLIN; + fds[n++].revents = 0; + } + if(block) + { + fds[n].fd = 0; + fds[n].events = POLLIN; + fds[n++].revents = 0; + } + + while(!data_on_stdin) + { + switch(poll(fds,n,timeout)) + { + case -1: + if(errno == EINTR) + continue; + perror("poll"); + server_fd = 0; + break; + case 0: /* Nothing interesting going on */ + data_on_stdin = true; /* Can only get here if nonblocking */ + break; + default: + /* Make sure to handle the gdb port first! */ + if((fds[0].revents && gdb_fd && !o_serv_fd) || + (fds[1].revents && server_fd && gdb_fd)) + { + int revents = o_serv_fd ? fds[1].revents : fds[0].revents; + + if(revents & POLLIN) + GDBRequest(); + else /* Error Occurred */ + { + fprintf(stderr,"Received flags 0x%08x on gdb socket. Shutting down.\n",revents); + close(gdb_fd); + gdb_fd = 0; + } + } + if(fds[0].revents && o_serv_fd) + { + if(fds[0].revents & POLLIN) + JTAGRequest(); + else /* Error Occurred */ + { + fprintf(stderr,"Received flags 0x%08x on server. Shutting down.\n",fds[0].revents); + close(o_serv_fd); + server_fd = 0; + serverPort = 0; + serverIP = 0; + } + } + if(fds[2].revents || (fds[1].revents && !gdb_fd)) + data_on_stdin = true; + break; + } /* End of switch statement */ + } /* End of while statement */ +} + +void JTAGRequest(void) +{ + struct sockaddr_in sa; + struct sockaddr* addr = (struct sockaddr*)&sa; + socklen_t len = sizeof(struct sockaddr_in); + int fd = accept(server_fd,addr,&len); + int on_off = 0; /* Turn off Nagel's algorithm on the socket */ + int flags; + char sTemp[256]; + + if(fd < 0) + { + /* This is valid, because a connection could have started, + and then terminated due to a protocol error or user + initiation before the accept could take place. */ + if(errno != EWOULDBLOCK && errno != EAGAIN) + { + perror("accept"); + close(server_fd); + server_fd = 0; + serverPort = 0; + serverIP = 0; + } + return; + } + + if(gdb_fd) + { + close(fd); + return; + } + + if(fcntl(fd,F_GETFL,&flags) < 0) + { + sprintf(sTemp,"Unable to get flags for gdb socket %d",fd); + perror(sTemp); + close(fd); + return; + } + + if(fcntl(fd,F_SETFL, flags | O_NONBLOCK) < 0) + { + sprintf(sTemp,"Unable to set flags for gdb socket %d to value 0x%08x", + fd,flags | O_NONBLOCK); + perror(sTemp); + close(fd); + return; + } + + if(setsockopt(fd,tcp_level,TCP_NODELAY,&on_off,sizeof(int)) < 0) + { + sprintf(sTemp,"Unable to disable Nagel's algorithm for socket %d.\nsetsockopt",fd); + perror(sTemp); + close(fd); + return; + } + + gdb_fd = fd; +} + +void GDBRequest(void) +{ + JTAGProxyWriteMessage msg_write; + JTAGProxyReadMessage msg_read; + JTAGProxyChainMessage msg_chain; + JTAGProxyWriteResponse resp_write; + JTAGProxyReadResponse resp_read; + JTAGProxyChainResponse resp_chain; + JTAGProxyBlockWriteMessage *msg_bwrite; + JTAGProxyBlockReadMessage msg_bread; + JTAGProxyBlockWriteResponse resp_bwrite; + JTAGProxyBlockReadResponse *resp_bread; + char *buf; + int err = 0; + uint32_t command,length; + int len,i; + + /* First, we must read the incomming command */ + if(gdb_read(&command,sizeof(uint32_t)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 1"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + if(gdb_read(&length,sizeof(uint32_t)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 2"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + length = ntohl(length); + + /* Now, verify the protocol and implement the command */ + switch(ntohl(command)) + { + case JTAG_COMMAND_WRITE: + if(length != sizeof(msg_write) - 8) + { + ProtocolClean(length,JTAG_PROXY_PROTOCOL_ERROR); + return; + } + buf = (char*)&msg_write; + if(gdb_read(&buf[8],length) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 3"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + msg_write.address = ntohl(msg_write.address); + msg_write.data_H = ntohl(msg_write.data_H); + msg_write.data_L = ntohl(msg_write.data_L); + err = DebugSetRegister(msg_write.address,msg_write.data_L); + resp_write.status = htonl(err); + if(gdb_write(&resp_write,sizeof(resp_write)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 4"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + break; + case JTAG_COMMAND_READ: + if(length != sizeof(msg_read) - 8) + { + ProtocolClean(length,JTAG_PROXY_PROTOCOL_ERROR); + return; + } + buf = (char*)&msg_read; + if(gdb_read(&buf[8],length) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 5"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + msg_read.address = ntohl(msg_read.address); + err = DebugGetRegister(msg_read.address,&resp_read.data_L); + resp_read.status = htonl(err); + resp_read.data_H = 0; + resp_read.data_L = htonl(resp_read.data_L); + if(gdb_write(&resp_read,sizeof(resp_read)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 6"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + break; + case JTAG_COMMAND_BLOCK_WRITE: + if(length < sizeof(JTAGProxyBlockWriteMessage)-8) + { + ProtocolClean(length,JTAG_PROXY_PROTOCOL_ERROR); + return; + } + if(!(buf = (char*)malloc(8+length))) + { + ProtocolClean(length,JTAG_PROXY_OUT_OF_MEMORY); + return; + } + msg_bwrite = (JTAGProxyBlockWriteMessage*)buf; + if(gdb_read(&buf[8],length) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 5"); + close(gdb_fd); + gdb_fd = 0; + } + free(buf); + return; + } + msg_bwrite->address = ntohl(msg_bwrite->address); + msg_bwrite->nRegisters = ntohl(msg_bwrite->nRegisters); + for(i=0;inRegisters;i++) + { + int t_err = 0; + + msg_bwrite->data[i] = ntohl(msg_bwrite->data[i]); + t_err = DebugSetRegister(msg_bwrite->address + 4 * i,msg_bwrite->data[i]); + err = err ? err : t_err; + } + resp_bwrite.status = htonl(err); + free(buf); + buf = NULL; + msg_bwrite = NULL; + if(gdb_write(&resp_bwrite,sizeof(resp_bwrite)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 4"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + break; + case JTAG_COMMAND_BLOCK_READ: + if(length != sizeof(msg_bread) - 8) + { + ProtocolClean(length,JTAG_PROXY_PROTOCOL_ERROR); + return; + } + buf = (char*)&msg_bread; + if(gdb_read(&buf[8],length) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 5"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + msg_bread.address = ntohl(msg_bread.address); + msg_bread.nRegisters = ntohl(msg_bread.nRegisters); + len = sizeof(JTAGProxyBlockReadResponse) + 4*(msg_bread.nRegisters-1); + if(!(buf = (char*)malloc(len))) + { + ProtocolClean(0,JTAG_PROXY_OUT_OF_MEMORY); + return; + } + resp_bread = (JTAGProxyBlockReadResponse*)buf; + for(i=0;idata[i]); + resp_bread->data[i] = htonl(resp_bread->data[i]); + err = err ? err : t_err; + } + resp_bread->status = htonl(err); + resp_bread->nRegisters = htonl(msg_bread.nRegisters); + if(gdb_write(resp_bread,len) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 6"); + close(gdb_fd); + gdb_fd = 0; + } + free(buf); + return; + } + free(buf); + buf = NULL; + resp_bread = NULL; + break; + case JTAG_COMMAND_CHAIN: + if(length != sizeof(msg_chain) - 8) + { + ProtocolClean(length,JTAG_PROXY_PROTOCOL_ERROR); + return; + } + buf = (char*)&msg_chain; + if(gdb_read(&buf[8],sizeof(msg_chain)-8) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 7"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + msg_chain.chain = htonl(msg_chain.chain); + err = DebugSetChain(msg_chain.chain); + resp_chain.status = htonl(err); + if(gdb_write(&resp_chain,sizeof(resp_chain)) < 0) + { + if(gdb_fd) + { + perror("gdb socket - 8"); + close(gdb_fd); + gdb_fd = 0; + } + return; + } + break; + default: + ProtocolClean(length,JTAG_PROXY_COMMAND_NOT_IMPLEMENTED); + break; + } +} + +void ProtocolClean(int length,int32_t err) +{ + char buf[4096]; + + err = htonl(err); + if((gdb_read(buf,length) < 0) || + ((gdb_write(&err,sizeof(err)) < 0) && gdb_fd)) + { + perror("gdb socket - 9"); + close(gdb_fd); + gdb_fd = 0; + } +} + +static int gdb_write(const void* buf,int len) +{ + int n, log_n = 0; + const char* w_buf = (const char*)buf; + const uint32_t* log_buf = (const uint32_t*)buf; + struct pollfd block; + + while(len) { + if((n = write(gdb_fd,w_buf,len)) < 0) { + switch(errno) { + case EWOULDBLOCK: /* or EAGAIN */ + /* We've been called on a descriptor marked + for nonblocking I/O. We better simulate + blocking behavior. */ + block.fd = gdb_fd; + block.events = POLLOUT; + block.revents = 0; + poll(&block,1,-1); + continue; + case EINTR: + continue; + case EPIPE: + close(gdb_fd); + gdb_fd = 0; + return -1; + default: + return -1; + } + } + else { + len -= n; + w_buf += n; + if ( config.debug.vapi_id ) + for ( log_n += n; log_n >= 4; log_n -= 4, ++ log_buf ) + vapi_write_log_file( VAPI_COMMAND_SEND, config.debug.vapi_id, ntohl(*log_buf) ); + } + } + return 0; +} + +static int gdb_read(void* buf,int len) +{ + int n, log_n = 0; + char* r_buf = (char*)buf; + uint32_t* log_buf = (uint32_t*)buf; + struct pollfd block; + + while(len) { + if((n = read(gdb_fd,r_buf,len)) < 0) { + switch(errno) { + case EWOULDBLOCK: /* or EAGAIN */ + /* We've been called on a descriptor marked + for nonblocking I/O. We better simulate + blocking behavior. */ + block.fd = gdb_fd; + block.events = POLLIN; + block.revents = 0; + poll(&block,1,-1); + continue; + case EINTR: + continue; + default: + return -1; + } + } + else if(n == 0) { + close(gdb_fd); + gdb_fd = 0; + return -1; + } + else { + len -= n; + r_buf += n; + if ( config.debug.vapi_id ) + for ( log_n += n; log_n >= 4; log_n -= 4, ++ log_buf ) + vapi_write_log_file( VAPI_COMMAND_REQUEST, config.debug.vapi_id, ntohl(*log_buf) ); + } + } + return 0; +} + +void gdbcomm_init (void) +{ + serverPort = config.debug.server_port; + if((server_fd = GetServerSocket("or1ksim","tcp",serverPort))) + PRINTF("JTAG Proxy server started on port %d\n",serverPort); + else + PRINTF("Cannot start JTAG proxy server on port %d\n", serverPort); +}
gdbcomm.c Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: debug_unit.h =================================================================== --- debug_unit.h (nonexistent) +++ debug_unit.h (revision 1765) @@ -0,0 +1,122 @@ +/* debug_unit.h -- Simulation of Or1k debug unit + Copyright (C) 2001 Chris Ziomkowski, chris@asics.ws + +This file is part of OpenRISC 1000 Architectural Simulator. + +This program is free software; 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 2 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 +MERCHANTABILITY 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; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +typedef enum { + JTAG_CHAIN_GLOBAL = 0, + JTAG_CHAIN_DEBUG_UNIT = 1, + JTAG_CHAIN_TEST = 2, + JTAG_CHAIN_TRACE = 3, + JTAG_CHAIN_DEVELOPMENT = 4, + JTAG_CHAIN_WISHBONE = 5, + JTAG_CHAIN_BLOCK1 = 6, + JTAG_CHAIN_BLOCK2 = 7, + JTAG_CHAIN_OPTIONAL0 = 8, + JTAG_CHAIN_OPTIONAL1 = 9, + JTAG_CHAIN_OPTIONAL2 = 10, + JTAG_CHAIN_OPTIONAL3 = 11, + JTAG_CHAIN_OPTIONAL4 = 12, + JTAG_CHAIN_OPTIONAL5 = 13, + JTAG_CHAIN_OPTIONAL6 = 14, + JTAG_CHAIN_OPTIONAL7 = 15, +} DebugScanChainIDs; + + +typedef struct { + unsigned int DCR_hit; + unsigned int watchpoint; +} DebugUnit; + +typedef enum { + DebugInstructionFetch = 1, + DebugLoadAddress = 2, + DebugStoreAddress = 3, + DebugLoadData = 4, + DebugStoreData = 5, +} DebugUnitAction; + + +/* Debug registers and their bits */ +typedef struct { + unsigned long moder; + unsigned long tsel; + unsigned long qsel; + unsigned long ssel; + unsigned long riscop; + unsigned long recwp[11]; + unsigned long recbp; +} DevelopmentInterface; + +typedef enum { + DEVELOPINT_MODER = 0, + DEVELOPINT_TSEL = 1, + DEVELOPINT_QSEL = 2, + DEVELOPINT_SSEL = 3, + DEVELOPINT_RISCOP = 4, + DEVELOPINT_RECWP0 = 16, + DEVELOPINT_RECWP1 = 17, + DEVELOPINT_RECWP2 = 18, + DEVELOPINT_RECWP3 = 19, + DEVELOPINT_RECWP4 = 20, + DEVELOPINT_RECWP5 = 21, + DEVELOPINT_RECWP6 = 22, + DEVELOPINT_RECWP7 = 23, + DEVELOPINT_RECWP8 = 24, + DEVELOPINT_RECWP9 = 25, + DEVELOPINT_RECWP10 = 26, + DEVELOPINT_RECBP0 = 27, +} DevelopmentInterfaceAddressSpace; + +#define RISCOP_STALL 0x00000001 +#define RISCOP_RESET 0x00000002 + +/* Resets the debug unit */ +void du_reset(void); + +/* do cycle-related initialisation (watchpoints etc.) */ +void du_clock(void); + +/* set cpu_stalled flag */ +void set_stall_state (int state); + +/* Whether debug unit should ignore exception */ +int debug_ignore_exception (unsigned long except); + +/* Gets development interface register */ +int get_devint_reg(unsigned int addr, uint32_t *data); + +/* Sets development interface register */ +int set_devint_reg(unsigned int addr, uint32_t data); + +/* Reads from bus address */ +int debug_get_mem(oraddr_t address, uorreg_t *data); + +/* Writes to bus address */ +int debug_set_mem(oraddr_t address, uorreg_t data); + +int DebugGetRegister(oraddr_t address, uorreg_t *data); + +int DebugSetRegister(oraddr_t address, uorreg_t data); + +int DebugSetChain(int chain); + +#ifdef DEBUGMOD_OFF +#define CheckDebugUnit(x,y) 0 +#else +int CheckDebugUnit(DebugUnitAction, unsigned long); +#endif
debug_unit.h Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: gdbcomm.h =================================================================== --- gdbcomm.h (nonexistent) +++ gdbcomm.h (revision 1765) @@ -0,0 +1,37 @@ +/* gdbcomm.h -- Communication routines for gdb + Copyright (C) 2001 by Marko Mlinar, markom@opencores.org + Code copied from toplevel.c + + This file is part of OpenRISC 1000 Architectural Simulator. + + This program is free software; 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 2 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 + MERCHANTABILITY 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; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "gdb.h" +#include +#include +typedef enum { + false = 0, + true = 1, +} Boolean; + +void HandleServerSocket(Boolean); +void JTAGRequest(void); +void GDBRequest(void); +void ProtocolClean(int,int32_t); +void BlockJTAG(void); +int GetServerSocket(const char* name,const char* proto,int port); + +void gdbcomm_init (void);
gdbcomm.h Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: Makefile.in =================================================================== --- Makefile.in (nonexistent) +++ Makefile.in (revision 1765) @@ -0,0 +1,332 @@ +# Makefile.in generated by automake 1.6.3 from Makefile.am. +# @configure_input@ + +# Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 +# Free Software Foundation, Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +# Makefile -- Makefile for peripherals simulation +# Copyright (C) 1999 Damjan Lampret, lampret@opencores.org +# +# This file is part of OpenRISC 1000 Architectural Simulator. +# +# This program is free software; 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 2 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 +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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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 2 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 + MERCHANTABILITY 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; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifndef GDB_H +#define GDB_H + +#include + +#define DEBUG_SLOWDOWN (1) + +enum enum_errors /* modified CZ 24/05/01 */ +{ + /* Codes > 0 are for system errors */ + + ERR_NONE = 0, + ERR_CRC = -1, + ERR_MEM = -2, + JTAG_PROXY_INVALID_COMMAND = -3, + JTAG_PROXY_SERVER_TERMINATED = -4, + JTAG_PROXY_NO_CONNECTION = -5, + JTAG_PROXY_PROTOCOL_ERROR = -6, + JTAG_PROXY_COMMAND_NOT_IMPLEMENTED = -7, + JTAG_PROXY_INVALID_CHAIN = -8, + JTAG_PROXY_INVALID_ADDRESS = -9, + JTAG_PROXY_ACCESS_EXCEPTION = -10, /* Write to ROM */ + JTAG_PROXY_INVALID_LENGTH = -11, + JTAG_PROXY_OUT_OF_MEMORY = -12, +}; + +/* This is repeated from gdb tm-or1k.h There needs to be + a better mechanism for tracking this, but I don't see + an easy way to share files between modules. */ + +typedef enum { + JTAG_COMMAND_READ = 1, + JTAG_COMMAND_WRITE = 2, + JTAG_COMMAND_BLOCK_READ = 3, + JTAG_COMMAND_BLOCK_WRITE = 4, + JTAG_COMMAND_CHAIN = 5, +} JTAG_proxy_protocol_commands; + +/* Each transmit structure must begin with an integer + which specifies the type of command. Information + after this is variable. Make sure to have all information + aligned properly. If we stick with 32 bit integers, it + should be portable onto every platform. These structures + will be transmitted across the network in network byte + order. +*/ + +typedef struct { + uint32_t command; + uint32_t length; + uint32_t address; + uint32_t data_H; + uint32_t data_L; +} JTAGProxyWriteMessage; + +typedef struct { + uint32_t command; + uint32_t length; + uint32_t address; +} JTAGProxyReadMessage; + +typedef struct { + uint32_t command; + uint32_t length; + uint32_t address; + int32_t nRegisters; + uint32_t data[1]; +} JTAGProxyBlockWriteMessage; + +typedef struct { + uint32_t command; + uint32_t length; + uint32_t address; + int32_t nRegisters; +} JTAGProxyBlockReadMessage; + +typedef struct { + uint32_t command; + uint32_t length; + uint32_t chain; +} JTAGProxyChainMessage; + +/* The responses are messages specific, however convention + states the first word should be an error code. Again, + sticking with 32 bit integers should provide maximum + portability. */ + +typedef struct { + int32_t status; +} JTAGProxyWriteResponse; + +typedef struct { + int32_t status; + uint32_t data_H; + uint32_t data_L; +} JTAGProxyReadResponse; + +typedef struct { + int32_t status; +} JTAGProxyBlockWriteResponse; + +typedef struct { + int32_t status; + int32_t nRegisters; + uint32_t data[1]; + /* uint32_t data[nRegisters-1] still unread */ +} JTAGProxyBlockReadResponse; + +typedef struct { + int32_t status; +} JTAGProxyChainResponse; + +#endif /* GDB_H */
gdb.h Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: Makefile.am =================================================================== --- Makefile.am (nonexistent) +++ Makefile.am (revision 1765) @@ -0,0 +1,22 @@ +# Makefile -- Makefile for peripherals simulation +# Copyright (C) 1999 Damjan Lampret, lampret@opencores.org +# +# This file is part of OpenRISC 1000 Architectural Simulator. +# +# This program is free software; 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 2 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 +# MERCHANTABILITY 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; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# + +noinst_LIBRARIES = libdebug.a +libdebug_a_SOURCES = debug_unit.c debug_unit.h gdbcomm.c gdbcomm.h
Makefile.am Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property Index: . =================================================================== --- . (nonexistent) +++ . (revision 1765)
. Property changes : Added: svn:ignore ## -0,0 +1,2 ## +Makefile +.deps

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