/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
Copyright 1994, 1995 Free Software Foundation, Inc.
This file is part of GDB.
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 "defs.h"
#include "gdbcore.h"
#include "breakpoint.h"
#include "target.h"
#include "serial.h"
#include <sys/types.h>
#include <sys/time.h>
#if defined(__GO32__) || defined(WIN32)
#undef HAVE_SOCKETS
#else
#define HAVE_SOCKETS
#endif
#ifdef HAVE_SOCKETS
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
extern struct target_ops sparclite_ops; /* Forward decl */
extern struct target_ops remote_ops;
static char *remote_target_name = NULL;
static serial_t remote_desc = NULL;
static int serial_flag;
#ifdef HAVE_SOCKETS
static int udp_fd = -1;
#endif
static serial_t open_tty PARAMS ((char *name));
static int send_resp PARAMS ((serial_t desc, char c));
static void close_tty PARAMS ((int ignore));
#ifdef HAVE_SOCKETS
static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout));
static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len));
#endif
static void sparclite_open PARAMS ((char *name, int from_tty));
static void sparclite_close PARAMS ((int quitting));
static void download PARAMS ((char *target_name, char *args, int from_tty,
void (*write_routine) (bfd *from_bfd,
asection *from_sec,
file_ptr from_addr,
bfd_vma to_addr, int len),
void (*start_routine) (bfd_vma entry)));
static void sparclite_serial_start PARAMS ((bfd_vma entry));
static void sparclite_serial_write PARAMS ((bfd *from_bfd, asection *from_sec,
file_ptr from_addr,
bfd_vma to_addr, int len));
#ifdef HAVE_SOCKETS
static unsigned short calc_checksum PARAMS ((unsigned char *buffer,
int count));
static void sparclite_udp_start PARAMS ((bfd_vma entry));
static void sparclite_udp_write PARAMS ((bfd *from_bfd, asection *from_sec,
file_ptr from_addr, bfd_vma to_addr,
int len));
#endif
static void sparclite_download PARAMS ((char *filename, int from_tty));
#define DDA2_SUP_ASI 0xb000000
#define DDA1_SUP_ASI 0xb0000
#define DDA2_ASI_MASK 0xff000000
#define DDA1_ASI_MASK 0xff0000
#define DIA2_SUP_MODE 0x8000
#define DIA1_SUP_MODE 0x4000
#define DDA2_ENABLE 0x100
#define DDA1_ENABLE 0x80
#define DIA2_ENABLE 0x40
#define DIA1_ENABLE 0x20
#define DSINGLE_STEP 0x10
#define DDV_TYPE_MASK 0xc
#define DDV_TYPE_LOAD 0x0
#define DDV_TYPE_STORE 0x4
#define DDV_TYPE_ACCESS 0x8
#define DDV_TYPE_ALWAYS 0xc
#define DDV_COND 0x2
#define DDV_MASK 0x1
int
sparclite_insert_watchpoint (addr, len, type)
CORE_ADDR addr;
int len;
int type;
{
CORE_ADDR dcr;
dcr = read_register (DCR_REGNUM);
if (!(dcr & DDA1_ENABLE))
{
write_register (DDA1_REGNUM, addr);
dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
if (type == 1)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
}
else if (type == 0)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
}
else
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_ACCESS);
}
write_register (DCR_REGNUM, dcr);
}
else if (!(dcr & DDA2_ENABLE))
{
write_register (DDA2_REGNUM, addr);
dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
if (type == 1)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
}
else if (type == 0)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
}
else
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_ACCESS);
}
write_register (DCR_REGNUM, dcr);
}
else
return -1;
return 0;
}
int
sparclite_remove_watchpoint (addr, len, type)
CORE_ADDR addr;
int len;
int type;
{
CORE_ADDR dcr, dda1, dda2;
dcr = read_register (DCR_REGNUM);
dda1 = read_register (DDA1_REGNUM);
dda2 = read_register (DDA2_REGNUM);
if ((dcr & DDA1_ENABLE) && addr == dda1)
write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
else if ((dcr & DDA2_ENABLE) && addr == dda2)
write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
else
return -1;
return 0;
}
int
sparclite_insert_hw_breakpoint (addr, len)
CORE_ADDR addr;
int len;
{
CORE_ADDR dcr;
dcr = read_register (DCR_REGNUM);
if (!(dcr & DIA1_ENABLE))
{
write_register (DIA1_REGNUM, addr);
write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
}
else if (!(dcr & DIA2_ENABLE))
{
write_register (DIA2_REGNUM, addr);
write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
}
else
return -1;
return 0;
}
int
sparclite_remove_hw_breakpoint (addr, shadow)
CORE_ADDR addr;
int shadow;
{
CORE_ADDR dcr, dia1, dia2;
dcr = read_register (DCR_REGNUM);
dia1 = read_register (DIA1_REGNUM);
dia2 = read_register (DIA2_REGNUM);
if ((dcr & DIA1_ENABLE) && addr == dia1)
write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
else if ((dcr & DIA2_ENABLE) && addr == dia2)
write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
else
return -1;
return 0;
}
int
sparclite_check_watch_resources (type, cnt, ot)
int type;
int cnt;
int ot;
{
if (type == bp_hardware_breakpoint)
if (TARGET_HW_BREAK_LIMIT == 0)
return 0;
else if (cnt <= TARGET_HW_BREAK_LIMIT)
return 1;
else
if (TARGET_HW_WATCH_LIMIT == 0)
return 0;
else if (ot)
return -1;
else if (cnt <= TARGET_HW_WATCH_LIMIT)
return 1;
return -1;
}
CORE_ADDR
sparclite_stopped_data_address ()
{
CORE_ADDR dsr, dda1, dda2;
dsr = read_register (DSR_REGNUM);
dda1 = read_register (DDA1_REGNUM);
dda2 = read_register (DDA2_REGNUM);
if (dsr & 0x10)
return dda1;
else if (dsr & 0x20)
return dda2;
else
return 0;
}
static serial_t
open_tty (name)
char *name;
{
serial_t desc;
desc = SERIAL_OPEN (name);
if (!desc)
perror_with_name (name);
if (baud_rate != -1)
{
if (SERIAL_SETBAUDRATE (desc, baud_rate))
{
SERIAL_CLOSE (desc);
perror_with_name (name);
}
}
SERIAL_RAW (desc);
SERIAL_FLUSH_INPUT (desc);
return desc;
}
static int
send_resp (desc, c)
serial_t desc;
char c;
{
int i;
SERIAL_WRITE (desc, &c, 1);
i = SERIAL_READCHAR (desc, 2);
if (i >= 0)
return i;
switch (i)
{
case SERIAL_ERROR:
perror_with_name ("Remote communication error");
case SERIAL_TIMEOUT:
error ("Remote timeout");
case SERIAL_EOF:
error ("Remote connection closed");
}
}
static void
close_tty (ignore)
int ignore;
{
if (!remote_desc)
return;
SERIAL_CLOSE (remote_desc);
remote_desc = NULL;
}
#ifdef HAVE_SOCKETS
static int
recv_udp_buf (fd, buf, len, timeout)
int fd, len;
unsigned char *buf;
int timeout;
{
int cc;
fd_set readfds;
FD_ZERO (&readfds);
FD_SET (fd, &readfds);
if (timeout >= 0)
{
struct timeval timebuf;
timebuf.tv_sec = timeout;
timebuf.tv_usec = 0;
cc = select (fd + 1, &readfds, 0, 0, &timebuf);
}
else
cc = select (fd + 1, &readfds, 0, 0, 0);
if (cc == 0)
return 0;
if (cc != 1)
perror_with_name ("recv_udp_buf: Bad return value from select:");
cc = recv (fd, buf, len, 0);
if (cc < 0)
perror_with_name ("Got an error from recv: ");
}
static int
send_udp_buf (fd, buf, len)
int fd, len;
unsigned char *buf;
{
int cc;
cc = send (fd, buf, len, 0);
if (cc == len)
return;
if (cc < 0)
perror_with_name ("Got an error from send: ");
error ("Short count in send: tried %d, sent %d\n", len, cc);
}
#endif /* __GO32__ */
static void
sparclite_open (name, from_tty)
char *name;
int from_tty;
{
struct cleanup *old_chain;
int c;
char *p;
if (!name)
error ("You need to specify what device or hostname is associated with the SparcLite board.");
target_preopen (from_tty);
unpush_target (&sparclite_ops);
if (remote_target_name)
free (remote_target_name);
remote_target_name = strsave (name);
/* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
mean either a serial port on a terminal server, or the IP address of a
SPARClite demo board. If there's no colon, then it pretty much has to be
a local device (except for DOS... grrmble) */
p = strchr (name, ' ');
if (p)
{
*p++ = '\000';
while ((*p != '\000') && isspace (*p)) p++;
if (strncmp (name, "serial", strlen (name)) == 0)
serial_flag = 1;
else if (strncmp (name, "udp", strlen (name)) == 0)
serial_flag = 0;
else
error ("Must specify either `serial' or `udp'.");
}
else
{
p = name;
if (!strchr (name, ':'))
serial_flag = 1; /* No colon is unambiguous (local device) */
else
error ("Usage: target sparclite serial /dev/ttyb\n\
or: target sparclite udp host");
}
if (serial_flag)
{
remote_desc = open_tty (p);
old_chain = make_cleanup (close_tty, 0);
c = send_resp (remote_desc, 0x00);
if (c != 0xaa)
error ("Unknown response (0x%x) from SparcLite. Try resetting the board.",
c);
c = send_resp (remote_desc, 0x55);
if (c != 0x55)
error ("Sparclite appears to be ill.");
}
else
{
#ifdef HAVE_SOCKETS
struct hostent *he;
struct sockaddr_in sockaddr;
unsigned char buffer[100];
int cc;
/* Setup the socket. Must be raw UDP. */
he = gethostbyname (p);
if (!he)
error ("No such host %s.", p);
udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
old_chain = make_cleanup (close, udp_fd);
sockaddr.sin_family = PF_INET;
sockaddr.sin_port = htons(7000);
memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
if (connect (udp_fd, &sockaddr, sizeof(sockaddr)))
perror_with_name ("Connect failed");
buffer[0] = 0x5;
buffer[1] = 0;
send_udp_buf (udp_fd, buffer, 2); /* Request version */
cc = recv_udp_buf (udp_fd, buffer, sizeof(buffer), 5); /* Get response */
if (cc == 0)
error ("SPARClite isn't responding.");
if (cc < 3)
error ("SPARClite appears to be ill.");
#else
error ("UDP downloading is not supported for DOS hosts.");
#endif /* __GO32__ */
}
printf_unfiltered ("[SPARClite appears to be alive]\n");
push_target (&sparclite_ops);
discard_cleanups (old_chain);
return;
}
static void
sparclite_close (quitting)
int quitting;
{
if (serial_flag)
close_tty (0);
#ifdef HAVE_SOCKETS
else
if (udp_fd != -1)
close (udp_fd);
#endif
}
#define LOAD_ADDRESS 0x40000000
static void
download (target_name, args, from_tty, write_routine, start_routine)
char *target_name;
char *args;
int from_tty;
void (*write_routine)();
void (*start_routine)();
{
struct cleanup *old_chain;
asection *section;
bfd *pbfd;
bfd_vma entry;
int i;
#define WRITESIZE 1024
char *filename;
int quiet;
int nostart;
quiet = 0;
nostart = 0;
filename = NULL;
while (*args != '\000')
{
char *arg;
while (isspace (*args)) args++;
arg = args;
while ((*args != '\000') && !isspace (*args)) args++;
if (*args != '\000')
*args++ = '\000';
if (*arg != '-')
filename = arg;
else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
quiet = 1;
else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
nostart = 1;
else
error ("unknown option `%s'", arg);
}
if (!filename)
filename = get_exec_file (1);
pbfd = bfd_openr (filename, gnutarget);
if (pbfd == NULL)
{
perror_with_name (filename);
return;
}
old_chain = make_cleanup (bfd_close, pbfd);
if (!bfd_check_format (pbfd, bfd_object))
error ("\"%s\" is not an object file: %s", filename,
bfd_errmsg (bfd_get_error ()));
for (section = pbfd->sections; section; section = section->next)
{
if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
{
bfd_vma section_address;
bfd_size_type section_size;
file_ptr fptr;
section_address = bfd_get_section_vma (pbfd, section);
/* Adjust sections from a.out files, since they don't
carry their addresses with. */
if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
section_address += LOAD_ADDRESS;
section_size = bfd_get_section_size_before_reloc (section);
if (!quiet)
printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
bfd_get_section_name (pbfd, section),
section_address,
section_size);
fptr = 0;
while (section_size > 0)
{
int count;
static char inds[] = "|/-\\";
static int k = 0;
QUIT;
count = min (section_size, WRITESIZE);
write_routine (pbfd, section, fptr, section_address, count);
if (!quiet)
{
printf_unfiltered ("\r%c", inds[k++ % 4]);
gdb_flush (gdb_stdout);
}
section_address += count;
fptr += count;
section_size -= count;
}
}
}
if (!nostart)
{
entry = bfd_get_start_address (pbfd);
if (!quiet)
printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
start_routine (entry);
}
do_cleanups (old_chain);
}
static void
sparclite_serial_start (entry)
bfd_vma entry;
{
char buffer[5];
int i;
buffer[0] = 0x03;
store_unsigned_integer (buffer + 1, 4, entry);
SERIAL_WRITE (remote_desc, buffer, 1 + 4);
i = SERIAL_READCHAR (remote_desc, 2);
if (i != 0x55)
error ("Can't start SparcLite. Error code %d\n", i);
}
static void
sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
bfd *from_bfd;
asection *from_sec;
file_ptr from_addr;
bfd_vma to_addr;
int len;
{
char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
unsigned char checksum;
int i;
store_unsigned_integer (buffer, 4, to_addr); /* Address */
store_unsigned_integer (buffer + 4, 4, len); /* Length */
bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
checksum = 0;
for (i = 0; i < len; i++)
checksum += buffer[8 + i];
i = send_resp (remote_desc, 0x01);
if (i != 0x5a)
error ("Bad response from load command (0x%x)", i);
SERIAL_WRITE (remote_desc, buffer, 4 + 4 + len);
i = SERIAL_READCHAR (remote_desc, 2);
if (i < 0)
error ("I/O error in serial code. Return code %d\n", i);
if (i != checksum)
error ("Bad checksum from load command (0x%x)", i);
}
#ifdef HAVE_SOCKETS
static unsigned short
calc_checksum (buffer, count)
unsigned char *buffer;
int count;
{
unsigned short checksum;
checksum = 0;
for (; count > 0; count -= 2, buffer += 2)
checksum += (*buffer << 8) | *(buffer + 1);
if (count != 0)
checksum += *buffer << 8;
return checksum;
}
static void
sparclite_udp_start (entry)
bfd_vma entry;
{
unsigned char buffer[6];
int i;
buffer[0] = 0x3;
buffer[1] = 0;
buffer[2] = entry >> 24;
buffer[3] = entry >> 16;
buffer[4] = entry >> 8;
buffer[5] = entry;
send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
i = recv_udp_buf (udp_fd, buffer, sizeof(buffer), -1); /* Get response */
if (i < 1 || buffer[0] != 0x55)
error ("Failed to take start address.");
}
static void
sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len)
bfd *from_bfd;
asection *from_sec;
file_ptr from_addr;
bfd_vma to_addr;
int len;
{
unsigned char buffer[2000];
unsigned short checksum;
static int pkt_num = 0;
static unsigned long old_addr = -1;
int i;
while (1)
{
if (to_addr != old_addr)
{
buffer[0] = 0x1; /* Load command */
buffer[1] = 0x1; /* Loading address */
buffer[2] = to_addr >> 24;
buffer[3] = to_addr >> 16;
buffer[4] = to_addr >> 8;
buffer[5] = to_addr;
checksum = 0;
for (i = 0; i < 6; i++)
checksum += buffer[i];
checksum &= 0xff;
send_udp_buf (udp_fd, buffer, 6);
i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
if (i < 1)
error ("Got back short checksum for load addr.");
if (checksum != buffer[0])
error ("Got back bad checksum for load addr.");
pkt_num = 0; /* Load addr resets packet seq # */
old_addr = to_addr;
}
bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
len);
checksum = calc_checksum (buffer + 6, len);
buffer[0] = 0x1; /* Load command */
buffer[1] = 0x2; /* Loading data */
buffer[2] = pkt_num >> 8;
buffer[3] = pkt_num;
buffer[4] = checksum >> 8;
buffer[5] = checksum;
send_udp_buf (udp_fd, buffer, len + 6);
i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
if (i == 0)
{
fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
continue;
}
if (buffer[0] != 0xff)
error ("Got back bad response for load data.");
old_addr += len;
pkt_num++;
return;
}
}
#endif /* __GO32__ */
static void
sparclite_download (filename, from_tty)
char *filename;
int from_tty;
{
if (!serial_flag)
#ifdef HAVE_SOCKETS
download (remote_target_name, filename, from_tty, sparclite_udp_write,
sparclite_udp_start);
#else
abort (); /* sparclite_open should prevent this! */
#endif
else
download (remote_target_name, filename, from_tty, sparclite_serial_write,
sparclite_serial_start);
}
/* Define the target subroutine names */
static struct target_ops sparclite_ops =
{
"sparclite", /* to_shortname */
"SPARClite remote target", /* to_longname */
"Use a remote SPARClite target board via a serial line, using a gdb-specific protocol.\n\
Specify the serial device it is connected to (e.g. /dev/ttya).", /* to_doc */
sparclite_open, /* to_open */
sparclite_close, /* to_close */
0, /* to_attach */
0, /* to_detach */
0, /* to_resume */
0, /* to_wait */
0, /* to_fetch_registers */
0, /* to_store_registers */
0, /* to_prepare_to_store */
0, /* to_xfer_memory */
0, /* to_files_info */
0, /* to_insert_breakpoint */
0, /* to_remove_breakpoint */
0, /* to_terminal_init */
0, /* to_terminal_inferior */
0, /* to_terminal_ours_for_output */
0, /* to_terminal_ours */
0, /* to_terminal_info */
0, /* to_kill */
sparclite_download, /* to_load */
0, /* to_lookup_symbol */
0, /* to_create_inferior */
0, /* to_mourn_inferior */
0, /* to_can_run */
0, /* to_notice_signals */
0, /* to_stop */
download_stratum, /* to_stratum */
0, /* to_next */
0, /* to_has_all_memory */
0, /* to_has_memory */
0, /* to_has_stack */
0, /* to_has_registers */
0, /* to_has_execution */
0, /* sections */
0, /* sections_end */
OPS_MAGIC /* to_magic */
};
void
_initialize_sparcl_tdep ()
{
add_target (&sparclite_ops);
}