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/*

 *   FILE: i960.h

 * AUTHOR: kma

 *  DESCR: generic definitions of i960 data structures

 */

#ifndef I960_H

#define I960_H

#ident "$Id: i960.h,v 1.1 2005-12-20 11:35:39 jcastillo Exp $"

#ifdef __ASSEMBLY__

/*

 * register saving/restoring code. used by both syscall and interrupt handlers

 */

#define current SYMBOL_NAME(current_set)

#define SAVE_ALL(freereg) \

        ldconst 64, freereg; \

        addo    freereg, sp, sp;        \

        stq     g0, -64(sp);    \

        stq     g4, -48(sp);    \

        stq     g8, -32(sp);    \

        stq     g12, -16(sp)

#define RESTORE_ALL(freereg) \

        ldq     -16(sp), g12;   \

        ldq     -32(sp), g8;    \

        ldq     -48(sp), g4;    \

        ldq     -64(sp), g0;    \

        ldconst 64, freereg;    \

        subo    freereg, sp, sp

#else

typedef unsigned long reg_t;

static inline unsigned long get_ipl(void)

{

        unsigned long retval;

        __asm__ __volatile__("modpc     0, 0, %0" : "=r" (retval));

        return ( (retval >> 16) & 0x1f);

}

static inline unsigned long get_pc(void)

{

        unsigned long retval;

        __asm__ __volatile__("modpc     0, 0, %0" : "=r" (retval));

        return retval;

}

/*

 * Interrupt record. Every interrupt handler has one located at fp-16.

 * We'll ultimately use the saved PC to determine whether we interrupted

 * supervisor or user mode.

 */

typedef struct {

        reg_t           ir_pc;

        reg_t           ir_ac;

        unsigned char   ir_vec; /* vector number of interrupt; only low-order

                                   byte is meaningful */

} irec_t;

typedef void(*isr_t)(irec_t*);

typedef struct {

        reg_t   i_pending_pris;         /* priorities w/ pending intrs */

        reg_t   i_pending_ints[8];      /* pending interrupts */

        isr_t   i_vectors[248];         /* pointers to handlers */

} itab_t;

#endif

#endif