/* 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.
extern struct target_ops bdm_ppc_ops; /* Forward decl */
\f
-/* 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) */
+\f
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;
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:
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)
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)
{
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++)
{
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);
+*/
}
}
\f
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 */
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