1 /* $OpenBSD: db_machdep.h,v 1.25 2014/03/16 20:31:46 guenther Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.13 1996/04/29 20:50:08 leo Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1992 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 /* 31 * Machine-dependent defines for new kernel debugger. 32 */ 33 #ifndef _POWERPC_DB_MACHDEP_H_ 34 #define _POWERPC_DB_MACHDEP_H_ 35 36 #include <sys/types.h> 37 #include <uvm/uvm_param.h> 38 #include <machine/trap.h> 39 40 typedef vaddr_t db_addr_t; /* address - unsigned */ 41 typedef long db_expr_t; /* expression - signed */ 42 struct powerpc_saved_state { 43 struct trapframe tf; 44 }; 45 typedef struct powerpc_saved_state db_regs_t; 46 extern db_regs_t ddb_regs; /* register state */ 47 #define DDB_REGS (&ddb_regs) 48 49 #define PC_REGS(regs) ((regs)->tf.srr0) 50 #define SET_PC_REGS(regs, value) PC_REGS(regs) = (value) 51 52 #define BKPT_INST 0x7C810808 /* breakpoint instruction */ 53 54 #define BKPT_SIZE (4) /* size of breakpoint inst */ 55 #define BKPT_SET(inst) (BKPT_INST) 56 57 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf.srr0 -= 4) 58 59 #define SR_SINGLESTEP 0x8000 60 #define db_clear_single_step(regs) ((regs)->tf.srr1 &= ~SR_SINGLESTEP) 61 #define db_set_single_step(regs) ((regs)->tf.srr1 |= SR_SINGLESTEP) 62 63 #define T_BREAKPOINT 0xffff 64 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT) 65 66 #ifdef T_WATCHPOINT 67 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) 68 #else 69 #define IS_WATCHPOINT_TRAP(type, code) 0 70 #endif 71 72 #define M_RTS 0xfc0007fe 73 #define I_RTS 0x4c000020 74 #define M_BC 0xfc000000 75 #define I_BC 0x40000000 76 #define M_B 0xfc000000 77 #define I_B 0x50000000 78 #define M_RFI 0xfc0007fe 79 #define I_RFI 0x4c000064 80 81 #define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI) 82 #define inst_return(ins) (((ins)&M_RTS) == I_RTS) 83 #define inst_call(ins) (((ins)&M_BC ) == I_BC || \ 84 ((ins)&M_B ) == I_B ) 85 86 #ifdef _KERNEL 87 88 int db_enter_ddb(void); 89 void db_startcpu(int); 90 void db_stopcpu(int); 91 void ppc_ipi_db(struct cpu_info *); 92 93 void kdb_kintr(void *); 94 int kdb_trap(int, void *); 95 void db_save_regs(struct trapframe *frame); 96 void ddb_trap(void); 97 db_expr_t db_dumpframe(u_int32_t pframe, int (*pr)(const char *, ...)); 98 99 extern struct mutex ddb_mp_mutex; 100 101 #define DDB_STATE_NOT_RUNNING 0 102 #define DDB_STATE_RUNNING 1 103 #define DDB_STATE_EXITING 2 104 105 #endif /* _KERNEL */ 106 107 #endif /* _POWERPC_DB_MACHDEP_H_ */ 108