/*      $NetBSD: locore.h,v 1.9 2015/10/17 19:29:48 nakayama Exp $      */

/*
 * Copyright (c) 1996-2002 Eduardo Horvath
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 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.
 *
 */

#undef  CURLWP
#undef  CPCB
#undef  FPLWP

#define CURLWP  (CPUINFO_VA + CI_CURLWP)
#define CPCB    (CPUINFO_VA + CI_CPCB)
#define FPLWP   (CPUINFO_VA + CI_FPLWP)

/* A few convenient abbreviations for trapframe fields. */
#define TF_G    TF_GLOBAL
#define TF_O    TF_OUT
#define TF_L    TF_LOCAL
#define TF_I    TF_IN

/* Let us use same syntax as C code */
#define Debugger()      ta      1; nop


/*
 * This macro will clear out a cache line before an explicit
 * access to that location.  It's mostly used to make certain
 * loads bypassing the D$ do not get stale D$ data.
 *
 * It uses a register with the address to clear and a temporary
 * which is destroyed.
 */
#ifdef DCACHE_BUG
#define DLFLUSH(a,t) \
        andn    a, 0x3f, t; \
        stxa    %g0, [ t ] ASI_DCACHE_TAG; \
        membar  #Sync
/* The following can be used if the pointer is 32-byte aligned */
#define DLFLUSH2(t) \
        stxa    %g0, [ t ] ASI_DCACHE_TAG; \
        membar  #Sync
#else
#define DLFLUSH(a,t)
#define DLFLUSH2(t)
#endif


/*
 * A handy macro for maintaining instrumentation counters.
 * Note that this clobbers %o0, %o1 and %o2.  Normal usage is
 * something like:
 *      foointr:
 *              TRAP_SETUP(...)         ! makes %o registers safe
 *              INCR(_C_LABEL(cnt)+V_FOO)       ! count a foo
 */
#define INCR(what) \
        sethi   %hi(what), %o0; \
        or      %o0, %lo(what), %o0; \
99:     \
        lduw    [%o0], %o1; \
        add     %o1, 1, %o2; \
        casa    [%o0] ASI_P, %o1, %o2; \
        cmp     %o1, %o2; \
        bne,pn  %icc, 99b; \
         nop

/*
 * A couple of handy macros to save and restore globals to/from
 * locals.  Since udivrem uses several globals, and it's called
 * from vsprintf, we need to do this before and after doing a printf.
 */
#define GLOBTOLOC \
        mov     %g1, %l1; \
        mov     %g2, %l2; \
        mov     %g3, %l3; \
        mov     %g4, %l4; \
        mov     %g5, %l5; \
        mov     %g6, %l6; \
        mov     %g7, %l7

#define LOCTOGLOB \
        mov     %l1, %g1; \
        mov     %l2, %g2; \
        mov     %l3, %g3; \
        mov     %l4, %g4; \
        mov     %l5, %g5; \
        mov     %l6, %g6; \
        mov     %l7, %g7

/* Load strings address into register; NOTE: hidden local label 99 */
#define LOAD_ASCIZ(reg, s)      \
        set     99f, reg ;      \
        .data ;                 \
99:     .asciz  s ;             \
        _ALIGN ;                \
        .text

/*
 * Handy stack conversion macros.
 * They correctly switch to requested stack type
 * regardless of the current stack.
 */

#define TO_STACK64(size)                                        \
        save    %sp, size, %sp;                                 \
        add     %sp, -BIAS, %o0; /* Convert to 64-bits */       \
        andcc   %sp, 1, %g0; /* 64-bit stack? */                \
        movz    %icc, %o0, %sp

#define TO_STACK32(size)                                        \
        save    %sp, size, %sp;                                 \
        add     %sp, +BIAS, %o0; /* Convert to 32-bits */       \
        andcc   %sp, 1, %g0; /* 64-bit stack? */                \
        movnz   %icc, %o0, %sp

#ifdef _LP64
#define STACKFRAME(size)        TO_STACK64(size)
#else
#define STACKFRAME(size)        TO_STACK32(size)
#endif

/*
 * Primitives
 */
#ifdef ENTRY
#undef ENTRY
#endif

#ifdef GPROF
        .globl  _mcount
#define ENTRY(x) \
        .globl _C_LABEL(x); .type _C_LABEL(x),@function; \
_C_LABEL(x): ; \
        .data; \
        .align 8; \
0:      .word 0; .word 0; \
        .text;  \
        save    %sp, -CC64FSZ, %sp; \
        sethi   %hi(0b), %o0; \
        call    _mcount; \
        or      %o0, %lo(0b), %o0; \
        restore
#else
#define ENTRY(x)        .globl _C_LABEL(x); .type _C_LABEL(x),@function; \
        _C_LABEL(x):
#endif
#define ALTENTRY(x)     .globl _C_LABEL(x); _C_LABEL(x):