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authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/ppc-bdm.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
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diff --git a/gdb/ppc-bdm.c b/gdb/ppc-bdm.c
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+/* Remote target communications for the Macraigor Systems BDM Wiggler
+ talking to a Motorola PPC 8xx ADS board
+ 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 */
+
+/*#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 (name, from_tty)
+ 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 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 = ocd_wait ();
+
+ if (stop_reason)
+ {
+ target_status->value.sig = TARGET_SIGNAL_INT;
+ return inferior_pid;
+ }
+
+ 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_pid;
+}
+
+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 (regno)
+ 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 == MQ_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, &reglen);
+ }
+ }
+ 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, &reglen);
+#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 (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];
+
+ /* only attempt to write if it's a valid ppc 8xx register */
+ /* (need to avoid FP regs and MQ reg) */
+ if ((i != MQ_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 == MQ_REGNUM)
+ printf("don't write invalid reg %d (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_core_file_to_sym_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 ()
+{
+ init_bdm_ppc_ops() ;
+ add_target (&bdm_ppc_ops);
+}