2002-02-08 Joel Sherrill <joel@OARcorp.com>

	* Merged r46kstub.c into RTEMS distribution without modification.
	I got the code from Franz Fischer <Franz.Fischer@franz-fischer.de>
	who had used this with an old version of RTEMS with the mips64orion
	port of RTEMS.  After adding this to the repository, I will tailor
	this to work with the RTEMS exception processing model and trim
	no longer needed parts.
	* ChangeLog, gdb_if.h, ioaddr.h, limits.h, Makefile, mips_opcode.h,
	r4600.h, r46kstub.c, r46kstub.ld, README, stubinit.S:

1 files changed, 295 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/mips/shared/gdbstub/mips_opcode.h b/c/src/lib/libbsp/mips/shared/gdbstub/mips_opcode.h
new file mode 100644
index 0000000000..59c1a06798
--- /dev/null
+++ b/c/src/lib/libbsp/mips/shared/gdbstub/mips_opcode.h
@@ -0,0 +1,295 @@
+/*-
+ * Copyright (c) 1992 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * from: @(#)mips_opcode.h	7.1 (Berkeley) 3/19/92
+ * via: mips_opcode.h,v 1.1 1994/03/10 16:15:10 (algorithmics)
+ */
+
+/*
+ * Define the instruction formats and opcode values for the
+ * MIPS instruction set.
+ */
+
+#ifndef _MIPS_OPCODE_H
+#define _MIPS_OPCODE_H
+
+/*
+ * Define the instruction formats.
+ */
+typedef union {
+    unsigned word;
+
+#ifdef MIPSEL
+    struct {
+	unsigned imm: 16;
+	unsigned rt: 5;
+	unsigned rs: 5;
+	unsigned op: 6;
+    } IType;
+
+    struct {
+	unsigned target: 26;
+	unsigned op: 6;
+    } JType;
+
+    struct {
+	unsigned func: 6;
+	unsigned shamt: 5;
+	unsigned rd: 5;
+	unsigned rt: 5;
+	unsigned rs: 5;
+	unsigned op: 6;
+    } RType;
+
+    struct {
+	unsigned func: 6;
+	unsigned fd: 5;
+	unsigned fs: 5;
+	unsigned ft: 5;
+	unsigned fmt: 4;
+	unsigned : 1;		/* always '1' */
+	unsigned op: 6;		/* always '0x11' */
+    } FRType;
+#else
+    struct {
+	unsigned op: 6;
+	unsigned rs: 5;
+	unsigned rt: 5;
+	unsigned imm: 16;
+    } IType;
+
+    struct {
+	unsigned op: 6;
+	unsigned target: 26;
+    } JType;
+
+    struct {
+	unsigned op: 6;
+	unsigned rs: 5;
+	unsigned rt: 5;
+	unsigned rd: 5;
+	unsigned shamt: 5;
+	unsigned func: 6;
+    } RType;
+
+    struct {
+	unsigned op: 6;		/* always '0x11' */
+	unsigned : 1;		/* always '1' */
+	unsigned fmt: 4;
+	unsigned func: 6;
+	unsigned ft: 5;
+	unsigned fs: 5;
+	unsigned fd: 5;
+    } FRType;
+#endif
+} InstFmt;
+
+/*
+ * Values for the 'op' field.
+ */
+#define OP_SPECIAL	000
+#define OP_REGIMM	001
+#define OP_J		002
+#define	OP_JAL		003
+#define OP_BEQ		004
+#define OP_BNE		005
+#define OP_BLEZ		006
+#define OP_BGTZ		007
+
+#define OP_ADDI		010
+#define OP_ADDIU	011
+#define OP_SLTI		012
+#define OP_SLTIU	013
+#define OP_ANDI		014
+#define OP_ORI		015
+#define OP_XORI		016
+#define OP_LUI		017
+
+#define OP_COP0		020
+#define OP_COP1		021
+#define OP_COP2		022
+#define OP_BEQL		024
+#define OP_BNEL		025
+#define OP_BLEZL	026
+#define OP_BGTZL	027
+
+#define OP_DADDI	030
+#define OP_DADDIU	031
+#define OP_LDL		032
+#define OP_LDR		033
+
+#define OP_LB		040
+#define OP_LH		041
+#define OP_LWL		042
+#define OP_LW		043
+#define OP_LBU		044
+#define OP_LHU		045
+#define OP_LWR		046
+#define OP_LWU		047
+
+#define OP_SB		050
+#define OP_SH		051
+#define OP_SWL		052
+#define OP_SW		053
+#define OP_SDL		054
+#define OP_SDR		055
+#define OP_SWR		056
+#define OP_CACHE	057
+
+#define OP_LL		060
+#define OP_LWC1		061
+#define OP_LWC2		062
+#define OP_LLD		064
+#define OP_LDC1		065
+#define OP_LDC2		066
+#define OP_LD		067
+
+#define OP_SC		070
+#define OP_SWC1		071
+#define OP_SWC2		072
+#define OP_SCD		074
+#define OP_SDC1		075
+#define OP_SDC2		076
+#define OP_SD		077
+
+/*
+ * Values for the 'func' field when 'op' == OP_SPECIAL.
+ */
+#define OP_SLL		000
+#define OP_SRL		002
+#define OP_SRA		003
+#define OP_SLLV		004
+#define OP_SRLV		006
+#define OP_SRAV		007
+
+#define OP_JR		010
+#define OP_JALR		011
+#define OP_SYSCALL	014
+#define OP_BREAK	015
+#define OP_SYNC		017
+
+#define OP_MFHI		020
+#define OP_MTHI		021
+#define OP_MFLO		022
+#define OP_MTLO		023
+#define OP_DSLLV	024
+#define OP_DSRLV	026
+#define OP_DSRAV	027
+
+#define OP_MULT		030
+#define OP_MULTU	031
+#define OP_DIV		032
+#define OP_DIVU		033
+#define OP_DMULT	034
+#define OP_DMULTU	035
+#define OP_DDIV		036
+#define OP_DDIVU	037
+
+#define OP_ADD		040
+#define OP_ADDU		041
+#define OP_SUB		042
+#define OP_SUBU		043
+#define OP_AND		044
+#define OP_OR		045
+#define OP_XOR		046
+#define OP_NOR		047
+
+#define OP_SLT		052
+#define OP_SLTU		053
+#define OP_DADD		054
+#define OP_DADDU	055
+#define OP_DSUB		056
+#define OP_DSUBU	057
+
+#define OP_TGE		060
+#define OP_TGEU		061
+#define OP_TLT		062
+#define OP_TLTU		063
+#define OP_TEQ		064
+#define OP_TNE		066
+
+#define OP_DSLL		070
+#define OP_DSRL		072
+#define OP_DSRA		073
+#define OP_DSLL32	074
+#define OP_DSRL32	076
+#define OP_DSRA32	077
+
+/*
+ * Values for the 'func' field when 'op' == OP_REGIMM.
+ */
+#define OP_BLTZ		000
+#define OP_BGEZ		001
+#define OP_BLTZL	002
+#define OP_BGEZL	003
+
+#define OP_TGEI		010
+#define OP_TGEIU	011
+#define OP_TLTI		012
+#define OP_TLTIU	013
+#define OP_TEQI		014
+#define OP_TNEI		016
+
+#define OP_BLTZAL	020
+#define OP_BGEZAL	021
+#define OP_BLTZALL	022
+#define OP_BGEZALL	023
+
+/*
+ * Values for the 'rs' field when 'op' == OP_COPz.
+ */
+#define OP_MF		000
+#define OP_DMF		001
+#define OP_CF		002
+#define OP_MT		004
+#define OP_DMT		005
+#define OP_CT		006
+#define OP_BC		010
+
+/*
+ * Values for the 'rt' field when 'op' == OP_COPz and 'rt' == OP_BC.
+ */
+#define COPz_BCF	0x00
+#define COPz_BCT	0x01
+#define COPz_BCFL	0x02
+#define COPz_BCTL	0x03
+
+/*
+ * Instructions with specal significance to debuggers.
+ */
+#define BREAK_INSTR	0x0000000d	/* instruction code for break */
+#define NOP_INSTR	0x00000000	/* instruction code for no-op */
+
+#endif  /* _MIPS_OPCODE_H */