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/*

 * 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

 * @brief This file contains register window trap handlers.

 */

#ifndef KERN_sparc64_REGWIN_H_

#define KERN_sparc64_REGWIN_H_

#include <arch/stack.h>

#include <arch/arch.h>

#include <align.h>

#define TT_CLEAN_WINDOW         0x24

#define TT_SPILL_0_NORMAL       0x80    /* kernel spills */

#define TT_SPILL_1_NORMAL       0x84    /* userspace spills */

#define TT_SPILL_2_NORMAL       0x88    /* spills to userspace window buffer */

#define TT_SPILL_0_OTHER        0xa0    /* spills to userspace window buffer */

#define TT_FILL_0_NORMAL        0xc0    /* kernel fills */

#define TT_FILL_1_NORMAL        0xc4    /* userspace fills */

#define REGWIN_HANDLER_SIZE     128

#define CLEAN_WINDOW_HANDLER_SIZE   REGWIN_HANDLER_SIZE

#define SPILL_HANDLER_SIZE      REGWIN_HANDLER_SIZE

#define FILL_HANDLER_SIZE       REGWIN_HANDLER_SIZE

/* Window Save Area offsets. */

#define L0_OFFSET   0

#define L1_OFFSET   8

#define L2_OFFSET   16

#define L3_OFFSET   24

#define L4_OFFSET   32

#define L5_OFFSET   40

#define L6_OFFSET   48

#define L7_OFFSET   56

#define I0_OFFSET   64

#define I1_OFFSET   72

#define I2_OFFSET   80

#define I3_OFFSET   88

#define I4_OFFSET   96

#define I5_OFFSET   104

#define I6_OFFSET   112

#define I7_OFFSET   120

/* Uspace Window Buffer constants. */

#define UWB_SIZE    ((NWINDOWS - 1) * STACK_WINDOW_SAVE_AREA_SIZE)

#define UWB_ALIGNMENT   1024

#define UWB_ASIZE   ALIGN_UP(UWB_SIZE, UWB_ALIGNMENT)

#ifdef __ASM__

/*

 * Macro used by the nucleus and the primary context 0 during normal and other spills.

 */

.macro SPILL_NORMAL_HANDLER_KERNEL

    stx %l0, [%sp + STACK_BIAS + L0_OFFSET]

    stx %l1, [%sp + STACK_BIAS + L1_OFFSET]

    stx %l2, [%sp + STACK_BIAS + L2_OFFSET]

    stx %l3, [%sp + STACK_BIAS + L3_OFFSET]

    stx %l4, [%sp + STACK_BIAS + L4_OFFSET]

    stx %l5, [%sp + STACK_BIAS + L5_OFFSET]

    stx %l6, [%sp + STACK_BIAS + L6_OFFSET]

    stx %l7, [%sp + STACK_BIAS + L7_OFFSET]

    stx %i0, [%sp + STACK_BIAS + I0_OFFSET]

    stx %i1, [%sp + STACK_BIAS + I1_OFFSET]

    stx %i2, [%sp + STACK_BIAS + I2_OFFSET]

    stx %i3, [%sp + STACK_BIAS + I3_OFFSET]

    stx %i4, [%sp + STACK_BIAS + I4_OFFSET]

    stx %i5, [%sp + STACK_BIAS + I5_OFFSET]

    stx %i6, [%sp + STACK_BIAS + I6_OFFSET]

    stx %i7, [%sp + STACK_BIAS + I7_OFFSET]

    saved

    retry

.endm

/*

 * Macro used by the userspace during normal spills.

 */

.macro SPILL_NORMAL_HANDLER_USERSPACE

    wr %g0, ASI_AIUP, %asi

    stxa %l0, [%sp + STACK_BIAS + L0_OFFSET] %asi

    stxa %l1, [%sp + STACK_BIAS + L1_OFFSET] %asi

    stxa %l2, [%sp + STACK_BIAS + L2_OFFSET] %asi

    stxa %l3, [%sp + STACK_BIAS + L3_OFFSET] %asi

    stxa %l4, [%sp + STACK_BIAS + L4_OFFSET] %asi

    stxa %l5, [%sp + STACK_BIAS + L5_OFFSET] %asi

    stxa %l6, [%sp + STACK_BIAS + L6_OFFSET] %asi

    stxa %l7, [%sp + STACK_BIAS + L7_OFFSET] %asi

    stxa %i0, [%sp + STACK_BIAS + I0_OFFSET] %asi

    stxa %i1, [%sp + STACK_BIAS + I1_OFFSET] %asi

    stxa %i2, [%sp + STACK_BIAS + I2_OFFSET] %asi

    stxa %i3, [%sp + STACK_BIAS + I3_OFFSET] %asi

    stxa %i4, [%sp + STACK_BIAS + I4_OFFSET] %asi

    stxa %i5, [%sp + STACK_BIAS + I5_OFFSET] %asi

    stxa %i6, [%sp + STACK_BIAS + I6_OFFSET] %asi

    stxa %i7, [%sp + STACK_BIAS + I7_OFFSET] %asi

    saved

    retry

.endm

/*

 * Macro used to spill userspace window to userspace window buffer.

 * It can be either triggered from preemptible_handler doing SAVE

 * at (TL=1) or from normal kernel code doing SAVE when OTHERWIN>0

 * at (TL=0).

 */

.macro SPILL_TO_USPACE_WINDOW_BUFFER

    stx %l0, [%g7 + L0_OFFSET] 

    stx %l1, [%g7 + L1_OFFSET]

    stx %l2, [%g7 + L2_OFFSET]

    stx %l3, [%g7 + L3_OFFSET]

    stx %l4, [%g7 + L4_OFFSET]

    stx %l5, [%g7 + L5_OFFSET]

    stx %l6, [%g7 + L6_OFFSET]

    stx %l7, [%g7 + L7_OFFSET]

    stx %i0, [%g7 + I0_OFFSET]

    stx %i1, [%g7 + I1_OFFSET]

    stx %i2, [%g7 + I2_OFFSET]

    stx %i3, [%g7 + I3_OFFSET]

    stx %i4, [%g7 + I4_OFFSET]

    stx %i5, [%g7 + I5_OFFSET]

    stx %i6, [%g7 + I6_OFFSET]

    stx %i7, [%g7 + I7_OFFSET]

    add %g7, STACK_WINDOW_SAVE_AREA_SIZE, %g7

    saved

    retry

.endm

/*

 * Macro used by the nucleus and the primary context 0 during normal fills.

 */

.macro FILL_NORMAL_HANDLER_KERNEL

    ldx [%sp + STACK_BIAS + L0_OFFSET], %l0

    ldx [%sp + STACK_BIAS + L1_OFFSET], %l1

    ldx [%sp + STACK_BIAS + L2_OFFSET], %l2

    ldx [%sp + STACK_BIAS + L3_OFFSET], %l3

    ldx [%sp + STACK_BIAS + L4_OFFSET], %l4

    ldx [%sp + STACK_BIAS + L5_OFFSET], %l5

    ldx [%sp + STACK_BIAS + L6_OFFSET], %l6

    ldx [%sp + STACK_BIAS + L7_OFFSET], %l7

    ldx [%sp + STACK_BIAS + I0_OFFSET], %i0

    ldx [%sp + STACK_BIAS + I1_OFFSET], %i1

    ldx [%sp + STACK_BIAS + I2_OFFSET], %i2

    ldx [%sp + STACK_BIAS + I3_OFFSET], %i3

    ldx [%sp + STACK_BIAS + I4_OFFSET], %i4

    ldx [%sp + STACK_BIAS + I5_OFFSET], %i5

    ldx [%sp + STACK_BIAS + I6_OFFSET], %i6

    ldx [%sp + STACK_BIAS + I7_OFFSET], %i7

    restored

    retry

.endm

/*

 * Macro used by the userspace during normal fills.

 */

.macro FILL_NORMAL_HANDLER_USERSPACE

    wr %g0, ASI_AIUP, %asi

    ldxa [%sp + STACK_BIAS + L0_OFFSET] %asi, %l0

    ldxa [%sp + STACK_BIAS + L1_OFFSET] %asi, %l1

    ldxa [%sp + STACK_BIAS + L2_OFFSET] %asi, %l2

    ldxa [%sp + STACK_BIAS + L3_OFFSET] %asi, %l3

    ldxa [%sp + STACK_BIAS + L4_OFFSET] %asi, %l4

    ldxa [%sp + STACK_BIAS + L5_OFFSET] %asi, %l5

    ldxa [%sp + STACK_BIAS + L6_OFFSET] %asi, %l6

    ldxa [%sp + STACK_BIAS + L7_OFFSET] %asi, %l7

    ldxa [%sp + STACK_BIAS + I0_OFFSET] %asi, %i0

    ldxa [%sp + STACK_BIAS + I1_OFFSET] %asi, %i1

    ldxa [%sp + STACK_BIAS + I2_OFFSET] %asi, %i2

    ldxa [%sp + STACK_BIAS + I3_OFFSET] %asi, %i3

    ldxa [%sp + STACK_BIAS + I4_OFFSET] %asi, %i4

    ldxa [%sp + STACK_BIAS + I5_OFFSET] %asi, %i5

    ldxa [%sp + STACK_BIAS + I6_OFFSET] %asi, %i6

    ldxa [%sp + STACK_BIAS + I7_OFFSET] %asi, %i7

    restored

    retry

.endm

.macro CLEAN_WINDOW_HANDLER

    rdpr %cleanwin, %l0

    add %l0, 1, %l0

    wrpr %l0, 0, %cleanwin

    mov %r0, %l0

    mov %r0, %l1

    mov %r0, %l2

    mov %r0, %l3

    mov %r0, %l4

    mov %r0, %l5

    mov %r0, %l6

    mov %r0, %l7

    mov %r0, %o0

    mov %r0, %o1

    mov %r0, %o2

    mov %r0, %o3

    mov %r0, %o4

    mov %r0, %o5

    mov %r0, %o6

    mov %r0, %o7

    retry

.endm

#endif /* __ASM__ */

#endif

/** @}

 */