/* Remote target communications for the Macraigor Systems BDM Wiggler talking to a Motorola PPC 8xx ADS board Copyright 1996, 1997, 1998, 1999, 2000, 2001 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 #include "frame.h" #include "inferior.h" #include "bfd.h" #include "symfile.h" #include "target.h" #include "gdbcmd.h" #include "objfiles.h" #include "gdb-stabs.h" #include #include "serial.h" #include "ocd.h" #include "ppc-tdep.h" #include "regcache.h" static void bdm_ppc_open (char *name, int from_tty); static ptid_t bdm_ppc_wait (ptid_t ptid, struct target_waitstatus *target_status); static void bdm_ppc_fetch_registers (int regno); static void bdm_ppc_store_registers (int regno); extern struct target_ops bdm_ppc_ops; /* Forward decl */ /*#define BDM_NUM_REGS 71 */ #define BDM_NUM_REGS 24 #define BDM_REGMAP \ 2048, 2049, 2050, 2051, 2052, 2053, 2054, 2055, /* r0-r7 */ \ 2056, 2057, 2058, 2059, 2060, 2061, 2062, 2063, /* r8-r15 */ \ 2064, 2065, 2066, 2067, 2068, 2069, 2070, 2071, /* r16-r23 */ \ 2072, 2073, 2074, 2075, 2076, 2077, 2078, 2079, /* r24-r31 */ \ \ 2080, 2082, 2084, 2086, 2088, 2090, 2092, 2094, /* fp0->fp8 */ \ 2096, 2098, 2100, 2102, 2104, 2106, 2108, 2110, /* fp0->fp8 */ \ 2112, 2114, 2116, 2118, 2120, 2122, 2124, 2126, /* fp0->fp8 */ \ 2128, 2130, 2132, 2134, 2136, 2138, 2140, 2142, /* fp0->fp8 */ \ \ 26, /* pc (SRR0 (SPR 26)) */ \ 2146, /* ps (MSR) */ \ 2144, /* cnd (CR) */ \ 8, /* lr (SPR 8) */ \ 9, /* cnt (CTR (SPR 9)) */ \ 1, /* xer (SPR 1) */ \ 0, /* mq (SPR 0) */ char nowatchdog[4] = {0xff, 0xff, 0xff, 0x88}; /* Open a connection to a remote debugger. NAME is the filename used for communication. */ static void bdm_ppc_open (char *name, int from_tty) { CORE_ADDR watchdogaddr = 0xff000004; ocd_open (name, from_tty, OCD_TARGET_MOTO_PPC, &bdm_ppc_ops); /* We want interrupts to drop us into debugging mode. */ /* Modify the DER register to accomplish this. */ ocd_write_bdm_register (149, 0x20024000); /* Disable watchdog timer on the board */ ocd_write_bytes (watchdogaddr, nowatchdog, 4); } /* 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 ptid_t bdm_ppc_wait (ptid_t ptid, struct target_waitstatus *target_status) { int stop_reason; target_status->kind = TARGET_WAITKIND_STOPPED; stop_reason = ocd_wait (); if (stop_reason) { target_status->value.sig = TARGET_SIGNAL_INT; return inferior_ptid; } target_status->value.sig = TARGET_SIGNAL_TRAP; /* XXX for now */ #if 0 { unsigned long ecr, der; ecr = ocd_read_bdm_register (148); /* Read the exception cause register */ der = ocd_read_bdm_register (149); /* Read the debug enables register */ fprintf_unfiltered (gdb_stdout, "ecr = 0x%x, der = 0x%x\n", ecr, der); } #endif return inferior_ptid; } static int bdm_regmap[] = {BDM_REGMAP}; /* Read the remote registers into regs. Fetch register REGNO, or all registers if REGNO == -1 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) (IBM PPC 5xx only) 2144 CR (known as cnd in GDB) 2145 FPCSR 2146 MSR (known as ps in GDB) */ static void bdm_ppc_fetch_registers (int regno) { int i; unsigned char *regs, *beginregs, *endregs, *almostregs; unsigned char midregs[32]; unsigned char mqreg[1]; int first_regno, last_regno; int first_bdm_regno, last_bdm_regno; int reglen, beginreglen, endreglen; #if 1 for (i = 0; i < (FPLAST_REGNUM - FP0_REGNUM + 1); i++) { midregs[i] = -1; } mqreg[0] = -1; #endif 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 */ } #if 1 /* Can't ask for floating point regs on ppc 8xx, also need to avoid asking for the mq register. */ if (first_regno == last_regno) /* only want one reg */ { /* printf("Asking for register %d\n", first_regno); */ /* if asking for an invalid register */ if ((first_regno == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) || (first_regno == gdbarch_tdep (current_gdbarch)->fpscr_regnum) || ((first_regno >= FP0_REGNUM) && (first_regno <= FPLAST_REGNUM))) { /* printf("invalid reg request!\n"); */ supply_register (first_regno, NULL); return; /* Unsupported register */ } else { regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len); } } else /* want all regs */ { /* printf("Asking for registers %d to %d\n", first_regno, last_regno); */ beginregs = ocd_read_bdm_registers (first_bdm_regno, FP0_REGNUM - 1, &beginreglen); endregs = (strcat (midregs, ocd_read_bdm_registers (FPLAST_REGNUM + 1, last_bdm_regno - 1, &endreglen))); almostregs = (strcat (beginregs, endregs)); regs = (strcat (almostregs, mqreg)); reglen = beginreglen + 32 + endreglen + 1; } #endif #if 0 regs = ocd_read_bdm_registers (first_bdm_regno, last_bdm_regno, ®len); #endif 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 (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]; /* only attempt to write if it's a valid ppc 8xx register */ /* (need to avoid FP regs and MQ reg) */ if ((i != gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) && (i != gdbarch_tdep (current_gdbarch)->ppc_fpscr_regnum) && ((i < FP0_REGNUM) || (i > FPLAST_REGNUM))) { /* printf("write valid reg %d\n", bdm_regno); */ ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4); } /* else if (i == gdbarch_tdep (current_gdbarch)->ppc_mq_regnum) printf("don't write invalid reg %d (PPC_MQ_REGNUM)\n", bdm_regno); else printf("don't write invalid reg %d\n", bdm_regno); */ } } /* Define the target subroutine names */ struct target_ops bdm_ppc_ops; static void init_bdm_ppc_ops (void) { bdm_ppc_ops.to_shortname = "ocd"; bdm_ppc_ops.to_longname = "Remote target with On-Chip Debugging"; bdm_ppc_ops.to_doc = "Use a remote target with On-Chip Debugging. To use a target box;\n\ specify the serial device it is connected to (e.g. /dev/ttya). To use\n\ a wiggler, specify wiggler and then the port it is connected to\n\ (e.g. wiggler lpt1)."; /* to_doc */ bdm_ppc_ops.to_open = bdm_ppc_open; bdm_ppc_ops.to_close = ocd_close; bdm_ppc_ops.to_attach = NULL; bdm_ppc_ops.to_post_attach = NULL; bdm_ppc_ops.to_require_attach = NULL; bdm_ppc_ops.to_detach = ocd_detach; bdm_ppc_ops.to_require_detach = NULL; bdm_ppc_ops.to_resume = ocd_resume; bdm_ppc_ops.to_wait = bdm_ppc_wait; bdm_ppc_ops.to_post_wait = NULL; bdm_ppc_ops.to_fetch_registers = bdm_ppc_fetch_registers; bdm_ppc_ops.to_store_registers = bdm_ppc_store_registers; bdm_ppc_ops.to_prepare_to_store = ocd_prepare_to_store; bdm_ppc_ops.to_xfer_memory = ocd_xfer_memory; bdm_ppc_ops.to_files_info = ocd_files_info; bdm_ppc_ops.to_insert_breakpoint = ocd_insert_breakpoint; bdm_ppc_ops.to_remove_breakpoint = ocd_remove_breakpoint; bdm_ppc_ops.to_terminal_init = NULL; bdm_ppc_ops.to_terminal_inferior = NULL; bdm_ppc_ops.to_terminal_ours_for_output = NULL; bdm_ppc_ops.to_terminal_ours = NULL; bdm_ppc_ops.to_terminal_info = NULL; bdm_ppc_ops.to_kill = ocd_kill; bdm_ppc_ops.to_load = ocd_load; bdm_ppc_ops.to_lookup_symbol = NULL; bdm_ppc_ops.to_create_inferior = ocd_create_inferior; bdm_ppc_ops.to_post_startup_inferior = NULL; bdm_ppc_ops.to_acknowledge_created_inferior = NULL; bdm_ppc_ops.to_clone_and_follow_inferior = NULL; bdm_ppc_ops.to_post_follow_inferior_by_clone = NULL; bdm_ppc_ops.to_insert_fork_catchpoint = NULL; bdm_ppc_ops.to_remove_fork_catchpoint = NULL; bdm_ppc_ops.to_insert_vfork_catchpoint = NULL; bdm_ppc_ops.to_remove_vfork_catchpoint = NULL; bdm_ppc_ops.to_has_forked = NULL; bdm_ppc_ops.to_has_vforked = NULL; bdm_ppc_ops.to_can_follow_vfork_prior_to_exec = NULL; bdm_ppc_ops.to_post_follow_vfork = NULL; bdm_ppc_ops.to_insert_exec_catchpoint = NULL; bdm_ppc_ops.to_remove_exec_catchpoint = NULL; bdm_ppc_ops.to_has_execd = NULL; bdm_ppc_ops.to_reported_exec_events_per_exec_call = NULL; bdm_ppc_ops.to_has_exited = NULL; bdm_ppc_ops.to_mourn_inferior = ocd_mourn; bdm_ppc_ops.to_can_run = 0; bdm_ppc_ops.to_notice_signals = 0; bdm_ppc_ops.to_thread_alive = ocd_thread_alive; bdm_ppc_ops.to_stop = ocd_stop; bdm_ppc_ops.to_pid_to_exec_file = NULL; bdm_ppc_ops.to_stratum = process_stratum; bdm_ppc_ops.DONT_USE = NULL; bdm_ppc_ops.to_has_all_memory = 1; bdm_ppc_ops.to_has_memory = 1; bdm_ppc_ops.to_has_stack = 1; bdm_ppc_ops.to_has_registers = 1; bdm_ppc_ops.to_has_execution = 1; bdm_ppc_ops.to_sections = NULL; bdm_ppc_ops.to_sections_end = NULL; bdm_ppc_ops.to_magic = OPS_MAGIC; } /* init_bdm_ppc_ops */ void _initialize_bdm_ppc (void) { init_bdm_ppc_ops (); add_target (&bdm_ppc_ops); }