From 2549d2b38572740e9ce0ec4f517f5b8357ea51e0 Mon Sep 17 00:00:00 2001 From: Geoffrey Noer Date: Mon, 11 Aug 1997 23:40:26 +0000 Subject: Mon Aug 11 16:22:36 1997 Geoffrey Noer * ocd.c (ocd_insert_breakpoint, ocd_remove_breakpoint): macro BDM_BREAKPOINT already has braces around it, remove erroneous ones. * ser-ocd.c (ocd_write): conditionalize on _WIN32 instead of __CYGWIN32__ * config/powerpc/tm-ppc-eabi.h: remove BDM_NUM_REGS, BDM_REGMAP * ppc-bdm.c: move BDM_NUM_REGS, BDM_REGMAP here from tm.h file, fill in doc fields of bdm_ppc_ops. (bdm_ppc_fetch_registers): don't ask for invalid registers such as the MQ or floating point regs not present on ppc 8xx boards (bdm_ppc_store_registers): don't write those same invalid registers * config/i386/cygwin32.mh: stop including ocd.o ser-ocd.o * config/powerpc/ppc-eabi.mt: * config/powerpc/ppcle-eabi.mt: * config/powerpc/ppc-sim.mt: * config/powerpc/ppcle-sim.mt: include ser-ocd.o --- gdb/ppc-bdm.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 95 insertions(+), 9 deletions(-) (limited to 'gdb/ppc-bdm.c') diff --git a/gdb/ppc-bdm.c b/gdb/ppc-bdm.c index dcc2690..5ca012f 100644 --- a/gdb/ppc-bdm.c +++ b/gdb/ppc-bdm.c @@ -1,5 +1,5 @@ /* Remote target communications for the Macraigor Systems BDM Wiggler - talking to a Motorola PPC 505. + talking to a Motorola PPC 8xx ADS board Copyright 1996, 1997 Free Software Foundation, Inc. This file is part of GDB. @@ -47,11 +47,34 @@ 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. */ +/*#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; @@ -107,6 +130,7 @@ bdm_ppc_wait (pid, target_status) 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: @@ -118,7 +142,7 @@ static int bdm_regmap[] = {BDM_REGMAP}; 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) + 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) @@ -129,10 +153,20 @@ bdm_ppc_fetch_registers (regno) int regno; { int i; - unsigned char *regs; + 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; + 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) { @@ -157,7 +191,44 @@ bdm_ppc_fetch_registers (regno) 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, ®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++) { @@ -215,7 +286,19 @@ bdm_ppc_store_registers (regno) bdm_regno = bdm_regmap [i]; - ocd_write_bdm_registers (bdm_regno, registers + REGISTER_BYTE (i), 4); + /* 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); +*/ } } @@ -223,8 +306,11 @@ bdm_ppc_store_registers (regno) struct target_ops bdm_ppc_ops = { "ocd", /* to_shortname */ - "", /* to_longname */ - "", /* to_doc */ + "Remote target with On-Chip Debugging", /* to_longname */ + "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_open, /* to_open */ ocd_close, /* to_close */ NULL, /* to_attach */ -- cgit v1.1