169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
/*-
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* Copyright (c) 2001 Jake Burkholder.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_ASMACROS_H_
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#define _MACHINE_ASMACROS_H_
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#ifdef _KERNEL
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/*
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* Normal and alternate %g6 point to the pcb of the current process. Normal,
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& alternate and interrupt %g7 point to per-cpu data.
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*/
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#define PCB_REG %g6
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#define PCPU_REG %g7
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/*
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* Alternate %g5 points to a per-cpu panic stack, which is used as a last
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* resort, and for temporarily saving alternate globals.
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*/
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#define ASP_REG %g5
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#ifdef LOCORE
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/*
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* Atomically decrement an integer in memory.
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*/
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#define ATOMIC_DEC_INT(r1, r2, r3) \
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lduw [r1], r2 ; \
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9: sub r2, 1, r3 ; \
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casa [r1] ASI_N, r2, r3 ; \
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cmp r2, r3 ; \
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bne,pn %icc, 9b ; \
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mov r3, r2
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/*
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* Atomically increment an integer in memory.
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*/
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#define ATOMIC_INC_INT(r1, r2, r3) \
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lduw [r1], r2 ; \
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9: add r2, 1, r3 ; \
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casa [r1] ASI_N, r2, r3 ; \
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cmp r2, r3 ; \
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bne,pn %icc, 9b ; \
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mov r3, r2
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/*
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* Atomically clear a number of bits of an integer in memory.
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*/
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#define ATOMIC_CLEAR_INT(r1, r2, r3, bits) \
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lduw [r1], r2 ; \
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9: andn r2, bits, r3 ; \
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casa [r1] ASI_N, r2, r3 ; \
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cmp r2, r3 ; \
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bne,pn %icc, 9b ; \
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mov r3, r2
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#define PCPU(member) PCPU_REG + PC_ ## member
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#define PCPU_ADDR(member, reg) \
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add PCPU_REG, PC_ ## member, reg
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#define DEBUGGER() \
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ta %xcc, 1
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#define PANIC(msg, r1) \
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.sect .rodata ; \
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9: .asciz msg ; \
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.previous ; \
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SET(9b, r1, %o0) ; \
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call panic ; \
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nop
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#ifdef INVARIANTS
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#define KASSERT(r1, msg) \
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brnz r1, 8f ; \
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nop ; \
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PANIC(msg, r1) ; \
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8:
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#else
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#define KASSERT(r1, msg)
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#endif
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#define PUTS(msg, r1) \
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.sect .rodata ; \
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9: .asciz msg ; \
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.previous ; \
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SET(9b, r1, %o0) ; \
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call printf ; \
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nop
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/*
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* If the kernel can be located above 4G, setx needs to be used to load
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* symbol values, otherwise set is sufficient.
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*/
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#ifdef HIGH_KERNEL
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#define SET(sym, tmp, dst) \
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setx sym, tmp, dst
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#else
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#define SET(sym, tmp, dst) \
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set sym, dst
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#endif
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#define _ALIGN_DATA .align 8
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#ifdef GPROF
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#define _ALIGN_TEXT .align 32
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#else
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#define _ALIGN_TEXT .align 16
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#endif
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#define DATA(name) \
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.data ; \
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_ALIGN_DATA ; \
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.globl name ; \
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.type name, @object ; \
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name:
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#define EMPTY
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/*
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* Define a function entry point.
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*
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* The compiler produces #function for the .type pseudo-op, but the '#'
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* character has special meaning in cpp macros, so we use @function like
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* other architectures. The assembler seems to accept both.
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* The assembler also accepts a .proc pseudo-op, which is used by the
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* peep hole optimizer, whose argument is the type code of the return
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* value. Since this is difficult to predict and its expected that
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* assembler code is already optimized, we leave it out.
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*/
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#define ENTRY(name) \
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.text ; \
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_ALIGN_TEXT ; \
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.globl name ; \
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.type name, @function ; \
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name:
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#define END(name) \
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.size name, . - name
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#endif /* LOCORE */
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#endif /* _KERNEL */
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#endif /* !_MACHINE_ASMACROS_H_ */
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