source: mainline/kernel/arch/sparc64/include/trap/trap_table.h@ 2277e03

/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup sparc64interrupt
 * @{
 */
/** @file
 */

#ifndef KERN_sparc64_TRAP_TABLE_H_
#define KERN_sparc64_TRAP_TABLE_H_

#include <arch/stack.h>

#define TRAP_TABLE_ENTRY_COUNT  1024
#define TRAP_TABLE_ENTRY_SIZE   32
#define TRAP_TABLE_SIZE         (TRAP_TABLE_ENTRY_COUNT * TRAP_TABLE_ENTRY_SIZE)

/*
 * The following needs to be in sync with the definition of the istate
 * structure. The one STACK_ITEM_SIZE is counted for space holding the 7th
 * argument to syscall_handler (i.e. syscall number) and the other
 * STACK_ITEM_SIZE is counted because of the required alignment.
 */
#define PREEMPTIBLE_HANDLER_STACK_FRAME_SIZE \
    (STACK_WINDOW_SAVE_AREA_SIZE + STACK_ARG_SAVE_AREA_SIZE + \
    (2 * STACK_ITEM_SIZE) + (12 * 8))
#define SAVED_TSTATE    -(1 * 8)
#define SAVED_TPC       -(2 * 8)
#define SAVED_TNPC      -(3 * 8)        /* <-- istate_t begins here */
#define SAVED_Y         -(4 * 8)
#define SAVED_I0        -(5 * 8)
#define SAVED_I1        -(6 * 8)
#define SAVED_I2        -(7 * 8)
#define SAVED_I3        -(8 * 8)
#define SAVED_I4        -(9 * 8)
#define SAVED_I5        -(10 * 8)
#define SAVED_I6        -(11 * 8)
#define SAVED_I7        -(12 * 8)

#ifndef __ASM__

#include <typedefs.h>

struct trap_table_entry {
        uint8_t octets[TRAP_TABLE_ENTRY_SIZE];
} __attribute__ ((packed));

typedef struct trap_table_entry trap_table_entry_t;

extern trap_table_entry_t trap_table[TRAP_TABLE_ENTRY_COUNT];
extern trap_table_entry_t trap_table_save[TRAP_TABLE_ENTRY_COUNT];
#endif /* !__ASM__ */

#ifdef __ASM__
.macro SAVE_GLOBALS
        mov %g1, %l1
        mov %g2, %l2
        mov %g3, %l3
        mov %g4, %l4
        mov %g5, %l5
        mov %g6, %l6
        mov %g7, %l7
.endm

.macro RESTORE_GLOBALS
        mov %l1, %g1
        mov %l2, %g2
        mov %l3, %g3
        mov %l4, %g4
        mov %l5, %g5
        mov %l6, %g6
        mov %l7, %g7
.endm

.macro PREEMPTIBLE_HANDLER f
        sethi %hi(\f), %g1
        ba %xcc, preemptible_handler
        or %g1, %lo(\f), %g1
.endm

#endif /* __ASM__ */

#endif

/** @}
 */