| /* 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 <fcntl.h> |
| #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 <sys/types.h> |
| #include "serial.h" |
| #include "ocd.h" |
| #include "ppc-tdep.h" |
| #include "regcache.h" |
| #include "gdb_assert.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) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
| 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) |
| { |
| regcache_raw_supply (current_regcache, first_regno, NULL); |
| return; /* Unsupported register */ |
| } |
| |
| /* FIXME: jimb/2004-05-04: I'm not sure how to adapt this code to |
| processors that lack floating point registers, and I don't have |
| have the equipment to test it. So we'll leave that case for the |
| next person who encounters it. */ |
| gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
| |
| #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)->ppc_fpscr_regnum) |
| || ((first_regno >= tdep->ppc_fp0_regnum) |
| && (first_regno < tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| { |
| /* printf("invalid reg request!\n"); */ |
| regcache_raw_supply (current_regcache, first_regno, NULL); |
| return; /* Unsupported register */ |
| } |
| else |
| { |
| regs = ocd_read_bdm_registers (first_bdm_regno, |
| last_bdm_regno, ®len); |
| } |
| } |
| else |
| internal_error (__FILE__, __LINE__, |
| _("ppc_bdm_fetch_registers: " |
| "'all registers' case not implemented")); |
| |
| #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; |
| |
| regcache_raw_supply (current_regcache, i, regs + 4 * regoffset); |
| } |
| else |
| regcache_raw_supply (current_regcache, 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) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
| 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 */ |
| |
| /* FIXME: jimb/2004-05-04: I'm not sure how to adapt this code to |
| processors that lack floating point registers, and I don't have |
| have the equipment to test it. So we'll leave that case for the |
| next person who encounters it. */ |
| gdb_assert (ppc_floating_point_unit_p (current_gdbarch)); |
| |
| 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 < tdep->ppc_fp0_regnum) |
| || (i >= tdep->ppc_fp0_regnum + ppc_num_fprs))) |
| { |
| /* printf("write valid reg %d\n", bdm_regno); */ |
| ocd_write_bdm_registers (bdm_regno, deprecated_registers + DEPRECATED_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_detach = ocd_detach; |
| bdm_ppc_ops.to_resume = ocd_resume; |
| bdm_ppc_ops.to_wait = bdm_ppc_wait; |
| 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.deprecated_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_kill = ocd_kill; |
| bdm_ppc_ops.to_load = ocd_load; |
| bdm_ppc_ops.to_create_inferior = ocd_create_inferior; |
| bdm_ppc_ops.to_mourn_inferior = ocd_mourn; |
| bdm_ppc_ops.to_thread_alive = ocd_thread_alive; |
| bdm_ppc_ops.to_stop = ocd_stop; |
| bdm_ppc_ops.to_stratum = process_stratum; |
| 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_magic = OPS_MAGIC; |
| } /* init_bdm_ppc_ops */ |
| |
| extern initialize_file_ftype _initialize_bdm_ppc; /* -Wmissing-prototypes */ |
| |
| void |
| _initialize_bdm_ppc (void) |
| { |
| init_bdm_ppc_ops (); |
| add_target (&bdm_ppc_ops); |
| } |