2a32c6cea1
to the current pcb. Remove interrupt global defines; they use PCPU_REG now. Move ATOMIC_INC_INT here from exception.s, add ATOMIC_DEC_INT. Add a KASSERT macro for use in assembler.
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 2001 Jake Burkholder.
|
|
* 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.
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_ASMACROS_H_
|
|
#define _MACHINE_ASMACROS_H_
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/*
|
|
* Normal and alternate %g6 point to the pcb of the current process. Normal,
|
|
& alternate and interrupt %g7 point to per-cpu data.
|
|
*/
|
|
#define PCB_REG %g6
|
|
#define PCPU_REG %g7
|
|
|
|
/*
|
|
* Alternate %g5 points to a per-cpu panic stack, which is used as a last
|
|
* resort, and for temporarily saving alternate globals.
|
|
*/
|
|
#define ASP_REG %g5
|
|
|
|
/*
|
|
* MMU %g7 points to the user tsb.
|
|
*/
|
|
#define TSB_REG %g7
|
|
|
|
#ifdef LOCORE
|
|
|
|
/*
|
|
* Atomically decrement an integer in memory.
|
|
*/
|
|
#define ATOMIC_DEC_INT(r1, r2, r3) \
|
|
lduw [r1], r2 ; \
|
|
9: sub r2, 1, r3 ; \
|
|
casa [r1] ASI_N, r2, r3 ; \
|
|
cmp r2, r3 ; \
|
|
bne,pn %xcc, 9b ; \
|
|
mov r3, r2
|
|
|
|
/*
|
|
* Atomically increment an integer in memory.
|
|
*/
|
|
#define ATOMIC_INC_INT(r1, r2, r3) \
|
|
lduw [r1], r2 ; \
|
|
9: add r2, 1, r3 ; \
|
|
casa [r1] ASI_N, r2, r3 ; \
|
|
cmp r2, r3 ; \
|
|
bne,pn %xcc, 9b ; \
|
|
mov r3, r2
|
|
|
|
#define PCPU(member) %g7 + PC_ ## member
|
|
#define PCPU_ADDR(member, reg) add %g7, PC_ ## member, reg
|
|
|
|
#define DEBUGGER() ta %xcc, 1
|
|
|
|
#define PANIC(msg, r1) \
|
|
.sect .rodata ; \
|
|
9: .asciz msg ; \
|
|
.previous ; \
|
|
SET(9b, r1, %o0) ; \
|
|
call panic ; \
|
|
nop
|
|
|
|
#ifdef INVARIANTS
|
|
#define KASSERT(r1, msg) \
|
|
brnz r1, 8f ; \
|
|
nop ; \
|
|
PANIC(msg, r1) ; \
|
|
8:
|
|
#else
|
|
#define KASSERT(r1, msg)
|
|
#endif
|
|
|
|
#define PUTS(msg, r1) \
|
|
.sect .rodata ; \
|
|
9: .asciz msg ; \
|
|
.previous ; \
|
|
SET(9b, r1, %o0) ; \
|
|
call printf ; \
|
|
nop
|
|
|
|
/*
|
|
* If the kernel can be located above 4G, setx needs to be used to load
|
|
* symbol values, otherwise set is sufficient.
|
|
*/
|
|
#ifdef HIGH_KERNEL
|
|
#define SET(sym, tmp, dst) \
|
|
setx sym, tmp, dst
|
|
#else
|
|
#define SET(sym, tmp, dst) \
|
|
set sym, dst
|
|
#endif
|
|
|
|
#endif /* LOCORE */
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#define DATA(name) \
|
|
.data ; \
|
|
.globl name ; \
|
|
.type name, @object ; \
|
|
name ## :
|
|
|
|
#define EMPTY
|
|
|
|
#define ENTRY(name) \
|
|
.text ; \
|
|
.align 16 ; \
|
|
.globl name ; \
|
|
.type name, @function ; \
|
|
name ## :
|
|
|
|
#define END(name) \
|
|
.size name, . - name
|
|
|
|
#endif /* !_MACHINE_ASMACROS_H_ */
|