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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Portions Copyright 2012,2013 Justin Hibbits <jhibbits@freebsd.org>
*
* $FreeBSD$
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "assym.s"
#define _ASM
#include <sys/cpuvar_defs.h>
#include <sys/dtrace.h>
#include <machine/asm.h>
/*
#include <machine/cpu.h>
*/
/*
* Primitives
*/
.text
/*
void dtrace_membar_producer(void)
*/
ASENTRY_NOPROF(dtrace_membar_producer)
blr
END(dtrace_membar_producer)
/*
void dtrace_membar_consumer(void)
*/
ASENTRY_NOPROF(dtrace_membar_consumer)
blr
END(dtrace_membar_consumer)
/*
dtrace_icookie_t dtrace_interrupt_disable(void)
*/
ASENTRY_NOPROF(dtrace_interrupt_disable)
mfmsr %r3
andi. %r0,%r3,~PSL_EE@l
mtmsr %r0
blr
END(dtrace_interrupt_disable)
/*
void dtrace_interrupt_enable(dtrace_icookie_t cookie)
*/
ASENTRY_NOPROF(dtrace_interrupt_enable)
mtmsr %r3
blr
END(dtrace_interrupt_enable)
/*
uint32_t dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new)
*/
ASENTRY_NOPROF(dtrace_cas32)
1:
lwarx %r0,0,%r3
cmpw %r4,%r0
bne 2f
stwcx. %r5,0,%r3
bne 1b
2: mr %r3,%r0
blr
END(dtrace_cas32)
/*
void *
dtrace_casptr(void *target, void *cmp, void *new)
*/
ASENTRY_NOPROF(dtrace_casptr)
1:
lwarx %r0,0,%r3
cmpw %r4,%r0
bne 2f
stwcx. %r5,0,%r3
bne 1b
2: mr %r3,%r0
blr
END(dtrace_casptr)
/*
uintptr_t
dtrace_fulword(void *addr)
*/
ASENTRY_NOPROF(dtrace_fulword)
END(dtrace_fulword)
/*
XXX: unoptimized
void
dtrace_copy(uintptr_t src, uintptr_t dest, size_t size)
*/
ASENTRY_NOPROF(dtrace_copy)
addme %r7,%r3
addme %r8,%r4
1:
lbzu %r3,1(%r7)
stbu %r3,1(%r8)
addme %r5,%r5
beq 2f
2:
blr
END(dtrace_copy)
/*
void
dtrace_copystr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
*/
ASENTRY_NOPROF(dtrace_copystr)
addme %r7,%r3
addme %r8,%r4
1:
lbzu %r3,1(%r7)
stbu %r3,1(%r8)
addme %r5,%r5
beq 2f
or %r3,%r3,%r3
beq 2f
andi. %r0,%r5,0x0fff
beq 2f
lwz %r0,0(%r6)
andi. %r0,%r0,CPU_DTRACE_BADADDR
beq 1b
2:
blr
END(dtrace_copystr)
/*
void dtrace_invop_init(void)
*/
ASENTRY_NOPROF(dtrace_invop_init)
/* XXX: impement it properly -- implement dtrace_invop_start */
li %r0,0
li %r3,dtrace_invop_jump_addr@l
addis %r3,%r3,dtrace_invop_jump_addr@ha
stw %r0,0(%r3)
blr
END(dtrace_invop_init)
/*
void dtrace_invop_uninit(void)
*/
ASENTRY_NOPROF(dtrace_invop_uninit)
li %r0,0
li %r3,dtrace_invop_jump_addr@l
addis %r3,%r3,dtrace_invop_jump_addr@ha
stw %r0,0(%r3)
blr
END(dtrace_invop_uninit)
/*
* The panic() and cmn_err() functions invoke vpanic() as a common entry point
* into the panic code implemented in panicsys(). vpanic() is responsible
* for passing through the format string and arguments, and constructing a
* regs structure on the stack into which it saves the current register
* values. If we are not dying due to a fatal trap, these registers will
* then be preserved in panicbuf as the current processor state. Before
* invoking panicsys(), vpanic() activates the first panic trigger (see
* common/os/panic.c) and switches to the panic_stack if successful. Note that
* DTrace takes a slightly different panic path if it must panic from probe
* context. Instead of calling panic, it calls into dtrace_vpanic(), which
* sets up the initial stack as vpanic does, calls dtrace_panic_trigger(), and
* branches back into vpanic().
*/
/*
void
vpanic(const char *format, va_list alist)
*/
ASENTRY_NOPROF(vpanic) /* Initial stack layout: */
vpanic_common:
blr
END(vpanic)
/*
void
dtrace_vpanic(const char *format, va_list alist)
*/
ASENTRY_NOPROF(dtrace_vpanic) /* Initial stack layout: */
#if 0
bl dtrace_panic_trigger /* %eax = dtrace_panic_trigger() */
#endif
b vpanic_common
END(dtrace_vpanic)
/*
uintptr_t
dtrace_caller(int aframes)
*/
ASENTRY_NOPROF(dtrace_caller)
li %r3, -1
blr
END(dtrace_caller)
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