ioptrap.h

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#ifndef __IOPTRAP_H__
#define __IOPTRAP_H__
 
#include <types.h>
#include <irx.h>
 
/* IDT_R3000_20.pdf 3-11 table 3.5 */
typedef enum {
    EXCEPTION_Int, /* note you can't really work with this one. */
    EXCEPTION_Mod,
    EXCEPTION_TLBL,
    EXCEPTION_TLBS,
    EXCEPTION_AdEL,
    EXCEPTION_AdES,
    EXCEPTION_IBE,
    EXCEPTION_DBE,
    EXCEPTION_Syscall,
    EXCEPTION_Bp,
    EXCEPTION_RI,
    EXCEPTION_CpU,
    EXCEPTION_Ov,
    EXCEPTION_RESERVED13,
    EXCEPTION_RESERVED14 /* would be FPE, but that's not going to happen on the IOP */
} exception_type_t;
 
typedef struct exception_frame
{
    u32 epc;
    u32 cause;
    u32 badvaddr;
    u32 sr;
    u32 regs[32];
    u32 hi;
    u32 lo;
    u32 dcic;
} exception_frame_t;
 
/* Beware: the handler will be run in a 'bad' state. Consider you are
   on interrupt mode, so, only i* functions. */
typedef void (*trap_exception_handler_t)(exception_type_t type, exception_frame_t *ex);
 
#define DCIC_WR (1 << 27)
#define DCIC_RD (1 << 26)
#define DCIC_DA (1 << 25)
#define DCIC_PC (1 << 24)
 
extern const char *get_exception_name(exception_type_t type);
 
/* Will act as a setjmp. Returns 0 to say it was the first call,
   otherwise, returns the exception number. (note that you'll never
   get any interrupt...) Note that using this will completely disable
   user defined exception handlers. */
extern exception_type_t dbg_setjmp();
 
/* Will return the old handler. */
extern trap_exception_handler_t set_exception_handler(exception_type_t type, trap_exception_handler_t handler);
extern trap_exception_handler_t get_exception_handler(exception_type_t type);
 
/* Breakpoint stuff. */
extern void set_dba(u32 v);
extern void set_dbam(u32 v);
extern void set_dcic(u32 v);
extern u32 get_dba();
extern u32 get_dbam();
extern u32 get_dcic();
 
#define ioptrap_IMPORTS_start DECLARE_IMPORT_TABLE(ioptrap, 1, 1)
#define ioptrap_IMPORTS_end   END_IMPORT_TABLE
 
#define I_get_exception_name    DECLARE_IMPORT(4, get_exception_name)
#define I_dbg_setjmp            DECLARE_IMPORT(5, dbg_setjmp)
#define I_set_exception_handler DECLARE_IMPORT(6, set_exception_handler)
#define I_get_exception_handler DECLARE_IMPORT(7, get_exception_handler)
#define I_set_dba               DECLARE_IMPORT(8, set_dba)
#define I_set_dbam              DECLARE_IMPORT(9, set_dbam)
#define I_set_dcic              DECLARE_IMPORT(10, set_dcic)
#define I_get_dba               DECLARE_IMPORT(11, get_dba)
#define I_get_dbam              DECLARE_IMPORT(12, get_dbam)
#define I_get_dcic              DECLARE_IMPORT(13, get_dcic)
 
#endif /* __IOPTRAP_H__ */