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Diffstat (limited to 'gdb/ppc-bdm.c')
| -rw-r--r-- | gdb/ppc-bdm.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/gdb/ppc-bdm.c b/gdb/ppc-bdm.c new file mode 100644 index 0000000..6181298 --- /dev/null +++ b/gdb/ppc-bdm.c @@ -0,0 +1,260 @@ +/* Remote target communications for the Macraigor Systems BDM Wiggler + talking to a Motorola PPC 505. + Copyright 1996, 1997 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "gdbcore.h" +#include "gdb_string.h" +#include <fcntl.h> +#include "frame.h" +#include "inferior.h" +#include "bfd.h" +#include "symfile.h" +#include "target.h" +#include "wait.h" +#include "gdbcmd.h" +#include "objfiles.h" +#include "gdb-stabs.h" +#include <sys/types.h> +#include <signal.h> +#include "serial.h" +#include "ocd.h" + +static void bdm_ppc_open PARAMS ((char *name, int from_tty)); + +static int bdm_ppc_wait PARAMS ((int pid, + struct target_waitstatus *target_status)); + +static void bdm_ppc_fetch_registers PARAMS ((int regno)); + +static void bdm_ppc_store_registers PARAMS ((int regno)); + +extern struct target_ops bdm_ppc_ops; /* Forward decl */ + +/* Open a connection to a remote debugger. + NAME is the filename used for communication. */ + +static void +bdm_ppc_open (name, from_tty) + char *name; + int from_tty; +{ + wiggler_open (name, from_tty, WIGGLER_TARGET_MOTO_PPC, &bdm_ppc_ops); +} + +/* Wait until the remote machine stops, then return, + storing status in STATUS just as `wait' would. + Returns "pid" (though it's not clear what, if anything, that + means in the case of this target). */ + +static int +bdm_ppc_wait (pid, target_status) + int pid; + struct target_waitstatus *target_status; +{ + int stop_reason; + + target_status->kind = TARGET_WAITKIND_STOPPED; + + stop_reason = wiggler_wait (); + + if (stop_reason) + { + target_status->value.sig = TARGET_SIGNAL_INT; + return inferior_pid; + } + + target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */ + + { + unsigned long ecr, der; + + ecr = wiggler_read_bdm_register (148); /* Read the exception cause register */ + der = wiggler_read_bdm_register (149); /* Read the debug enables register */ + fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der); + } + + return inferior_pid; +} + +static int bdm_regmap[] = {BDM_REGMAP}; + +/* Read the remote registers into regs. + + The Wiggler uses the following codes to access the registers: + + 0 -> 1023 SPR 0 -> 1023 + 0 - SPR 0 - MQ + 1 - SPR 1 - XER + 8 - SPR 8 - LR + 9 - SPR 9 - CTR (known as cnt in GDB) + 26 - SPR 26 - SRR0 - pc + 1024 -> 2047 DCR 0 -> DCR 1023 (IBM PPC 4xx only) + 2048 -> 2079 R0 -> R31 + 2080 -> 2143 FP0 -> FP31 (64 bit regs) + 2144 CR (known as cnd in GDB) + 2145 FPCSR + 2146 MSR (known as ps in GDB) + */ + +static void +bdm_ppc_fetch_registers (regno) + int regno; +{ + int i; + unsigned char *regs; + int first_regno, last_regno; + int first_bdm_regno, last_bdm_regno; + int reglen; + + if (regno == -1) + { + first_regno = 0; + last_regno = NUM_REGS - 1; + + first_bdm_regno = 0; + last_bdm_regno = BDM_NUM_REGS - 1; + } + else + { + first_regno = regno; + last_regno = regno; + + first_bdm_regno = bdm_regmap [regno]; + last_bdm_regno = bdm_regmap [regno]; + } + + if (first_bdm_regno == -1) + { + supply_register (first_regno, NULL); + return; /* Unsupported register */ + } + + regs = wiggler_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len); + + for (i = first_regno; i <= last_regno; i++) + { + int bdm_regno, regoffset; + + bdm_regno = bdm_regmap [i]; + if (bdm_regno != -1) + { + regoffset = bdm_regno - first_bdm_regno; + + if (regoffset >= reglen / 4) + continue; + + supply_register (i, regs + 4 * regoffset); + } + else + supply_register (i, NULL); /* Unsupported register */ + } +} + +/* Store register REGNO, or all registers if REGNO == -1, from the contents + of REGISTERS. FIXME: ignores errors. */ + +static void +bdm_ppc_store_registers (regno) + int regno; +{ + int i; + int first_regno, last_regno; + int first_bdm_regno, last_bdm_regno; + + if (regno == -1) + { + first_regno = 0; + last_regno = NUM_REGS - 1; + + first_bdm_regno = 0; + last_bdm_regno = BDM_NUM_REGS - 1; + } + else + { + first_regno = regno; + last_regno = regno; + + first_bdm_regno = bdm_regmap [regno]; + last_bdm_regno = bdm_regmap [regno]; + } + + if (first_bdm_regno == -1) + return; /* Unsupported register */ + + for (i = first_regno; i <= last_regno; i++) + { + int bdm_regno; + + bdm_regno = bdm_regmap [i]; + + wiggler_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4); + } +} + +/* Define the target subroutine names */ + +struct target_ops bdm_ppc_ops = { + "wiggler", /* to_shortname */ + "", /* to_longname */ + "", /* to_doc */ + bdm_ppc_open, /* to_open */ + wiggler_close, /* to_close */ + NULL, /* to_attach */ + wiggler_detach, /* to_detach */ + wiggler_resume, /* to_resume */ + bdm_ppc_wait, /* to_wait */ + bdm_ppc_fetch_registers, /* to_fetch_registers */ + bdm_ppc_store_registers, /* to_store_registers */ + wiggler_prepare_to_store, /* to_prepare_to_store */ + wiggler_xfer_memory, /* to_xfer_memory */ + wiggler_files_info, /* to_files_info */ + memory_insert_breakpoint, /* to_insert_breakpoint */ + memory_remove_breakpoint, /* to_remove_breakpoint */ + NULL, /* to_terminal_init */ + NULL, /* to_terminal_inferior */ + NULL, /* to_terminal_ours_for_output */ + NULL, /* to_terminal_ours */ + NULL, /* to_terminal_info */ + wiggler_kill, /* to_kill */ + wiggler_load, /* to_load */ + NULL, /* to_lookup_symbol */ + wiggler_create_inferior, /* to_create_inferior */ + wiggler_mourn, /* to_mourn_inferior */ + 0, /* to_can_run */ + 0, /* to_notice_signals */ + wiggler_thread_alive, /* to_thread_alive */ + wiggler_stop, /* to_stop */ + process_stratum, /* to_stratum */ + NULL, /* to_next */ + 1, /* to_has_all_memory */ + 1, /* to_has_memory */ + 1, /* to_has_stack */ + 1, /* to_has_registers */ + 1, /* to_has_execution */ + NULL, /* sections */ + NULL, /* sections_end */ + OPS_MAGIC /* to_magic */ +}; + +void +_initialize_bdm_ppc () +{ + add_target (&bdm_ppc_ops); +} |