initial 88k import; code by nivas and based on mach luna88k

1 files changed, 169 insertions, 0 deletions

diff --git a/sys/arch/mvme88k/include/db_machdep.h b/sys/arch/mvme88k/include/db_machdep.h
new file mode 100644
index 00000000000..c27653ab45f
--- /dev/null
+++ b/sys/arch/mvme88k/include/db_machdep.h
@@ -0,0 +1,169 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1993-1991 Carnegie Mellon University
+ * Copyright (c) 1991 OMRON Corporation
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+/*
+ * HISTORY
+ */
+
+/*
+ * Machine-dependent defined for the new kernel debugger
+ */
+
+#ifndef  _M88K_DB_MACHDEP_H_
+#define  _M88K_DB_MACHDEP_H_ 1
+
+#include <sys/types.h>
+#include <vm/vm_prot.h>
+#include <vm/vm_param.h>
+#include <vm/vm_inherit.h>
+#include <vm/lock.h>
+#include <machine/pcb.h>	/* m88100_saved_state */
+#include <machine/psl.h>
+#include <machine/trap.h>
+
+#define BKPT_SIZE        (4)                /* number of bytes in bkpt inst. */
+#define BKPT_INST       (0xF000D082U)             /* tb0, 0,r0, vector 132 */
+#define BKPT_SET(inst)  (BKPT_INST)
+
+/* Entry trap for the debugger - used for inline assembly breaks*/
+#define ENTRY_ASM       	"tb0 0, r0, 132"
+#define DDB_ENTRY_TRAP_NO	132
+
+typedef vm_offset_t   db_addr_t;
+typedef int           db_expr_t;
+typedef struct m88100_saved_state db_regs_t;
+db_regs_t	      ddb_regs;	/* register state */
+#define DDB_REGS      (&ddb_regs)
+
+/*
+ * the low two bits of sxip, snip, sfip have valid bits
+ * in them that need to masked to get the correct addresses
+ */
+
+#define m88k_pc(regs) \
+({ \
+    int ret; \
+ \
+    if (regs->sxip & 2) /* is valid */ \
+	ret = regs->sxip & ~3; \
+    else if (regs->snip & 2) \
+	ret = regs->snip & ~3; \
+    else if (regs->sfip & 2) \
+	ret = regs->sfip & ~3; \
+    /* we are in trouble - none of the program counters is valid */ \
+    ret;  \
+})
+
+/*
+ * This is an actual function due to the fact that the sxip
+ * or snip could be nooped out due to a jmp or rte
+ */
+#define PC_REGS(regs) (regs->sxip & 2) ? regs->sxip & ~3 : (regs->snip & 2 ? \
+				regs->snip & ~3 : regs->sfip & ~3)
+
+#define pC_REGS(regs) (regs->sxip & 2) ? regs->sxip : (regs->snip & 2 ? \
+				regs->snip : regs->sfip)
+extern int db_noisy;
+#define NOISY(x) if (db_noisy) x
+#define NOISY2(x) if (db_noisy >= 2) x
+#define NOISY3(x) if (db_noisy >= 3) x
+
+extern int quiet_db_read_bytes;
+
+/* These versions are not constantly doing SPL */
+#define	cnmaygetc	db_getc
+#define	cngetc		db_getc
+#define	cnputc		db_putc
+
+/* breakpoint/watchpoint foo */
+#define IS_BREAKPOINT_TRAP(type,code) ((type)==T_KDB_BREAK)
+#if defined(T_WATCHPOINT)
+#define IS_WATCHPOINT_TRAP(type,code) ((type)==T_KDB_WATCH)
+#else
+#define IS_WATCHPOINT_TRAP(type,code) 0
+#endif /* T_WATCHPOINT */
+
+/* we don't want coff support */
+#define DB_NO_COFF 1
+
+/* need software single step */
+#define SOFTWARE_SSTEP 1
+
+/*
+ * Debugger can get to any address space
+ */
+
+#define DB_ACCESS_LEVEL DB_ACCESS_ANY
+
+#define DB_VALID_KERN_ADDR(addr) (!badaddr((void*)(addr), 1))
+#define DB_VALID_ADDRESS(addr,user) \
+  (user ? db_check_user_addr(addr) : DB_VALID_KERN_ADDR(addr))
+
+/* instruction type checking - others are implemented in db_sstep.c */
+
+#define inst_trap_return(ins)  ((ins) == 0xf400fc00U)
+
+/* don't need to load symbols */
+#define DB_SYMBOLS_PRELOADED 1
+
+/* machine specific commands have been added to ddb */
+#define DB_MACHINE_COMMANDS 1
+/* inst_return(ins) - is the instruction a function call return.
+ * Not mutually exclusive with inst_branch. Should be a jmp r1. */
+#define inst_return(I) (((I)&0xfffffbffU) == 0xf400c001U ? TRUE : FALSE)
+
+#ifdef __GNUC__
+/*
+ * inst_call - function call predicate: is the instruction a function call.
+ * Could be either bsr or jsr
+ */
+#define inst_call(I) ({ unsigned i = (I); \
+	((((i) & 0xf8000000U) == 0xc8000000U || /*bsr*/ \
+          ((i) & 0xfffffbe0U) == 0xf400c800U)   /*jsr*/ \
+	? TRUE : FALSE) \
+;})
+
+/*
+ * This routine should return true for instructions that result in unconditonal
+ * transfers of the flow of control. (Unconditional Jumps, subroutine calls,
+ * subroutine returns, etc).
+ *
+ *  Trap and return from trap  should not  be listed here.
+ */
+#define inst_unconditional_flow_transfer(I) ({ unsigned i = (I); \
+    ((((i) & 0xf0000000U) == 0xc0000000U || /* br, bsr */ \
+      ((i) & 0xfffff3e0U) == 0xf400c000U)   /* jmp, jsr */ \
+     ? TRUE: FALSE) \
+;})
+
+/* Return true if the instruction has a delay slot.  */
+#define db_branch_is_delayed(I)	inst_delayed(I)
+
+#endif	/* __GNUC__ */
+
+#define	db_printf_enter	db_printing
+
+#endif	/* _M88K_DB_MACHDEP_H_ */