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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
*
* $FreeBSD$
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#define _ASM
#define _LOCORE
#include <sys/cpuvar_defs.h>
#include <sys/dtrace.h>
#include <machine/asm.h>
#include <machine/cpu.h>
#include <machine/cpuregs.h>
#include <machine/regnum.h>
#include "assym.s"
.set noreorder # Noreorder is default style!
/*
* Primitives
*/
.text
/*
void dtrace_membar_producer(void)
*/
LEAF(dtrace_membar_producer)
j ra
nop
END(dtrace_membar_producer)
/*
void dtrace_membar_consumer(void)
*/
LEAF(dtrace_membar_consumer)
j ra
nop
END(dtrace_membar_consumer)
/*
dtrace_icookie_t dtrace_interrupt_disable(void)
*/
LEAF(dtrace_interrupt_disable)
mfc0 t0, MIPS_COP_0_STATUS
move v0, t0
and v0, v0, MIPS_SR_INT_IE
and t0, t0, ~MIPS_SR_INT_IE
mtc0 t0, MIPS_COP_0_STATUS
j ra
nop
END(dtrace_interrupt_disable)
/*
void dtrace_interrupt_enable(dtrace_icookie_t cookie)
*/
LEAF(dtrace_interrupt_enable)
mfc0 t0, MIPS_COP_0_STATUS
beqz a0, not_enabled
or t0, t0, MIPS_SR_INT_IE
mtc0 t0, MIPS_COP_0_STATUS
not_enabled:
j ra
nop
END(dtrace_interrupt_enable)
/*
uint32_t dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new)
*/
LEAF(dtrace_cas32)
1:
move t1, a2
ll t0, 0(a0)
bne t0, a1, 2f
nop
sc t1, 0(a0)
beqz t1, 1b
nop
2: move v0, t0
j ra
nop
END(dtrace_cas32)
/*
void *
dtrace_casptr(void *target, void *cmp, void *new)
*/
LEAF(dtrace_casptr)
1:
move t1, a2
PTR_LL t0, 0(a0)
bne t0, a1, 2f
nop
PTR_SC t1, 0(a0)
beqz t1, 1b
nop
2: move v0, t0
j ra
nop
END(dtrace_casptr)
/*
uintptr_t
dtrace_fulword(void *addr)
*/
LEAF(dtrace_fulword)
END(dtrace_fulword)
/*
uint8_t
dtrace_fuword8_nocheck(void *addr)
*/
LEAF(dtrace_fuword8_nocheck)
lbu v0, 0(a0)
j ra
nop
END(dtrace_fuword8_nocheck)
/*
uint16_t
dtrace_fuword16_nocheck(void *addr)
*/
LEAF(dtrace_fuword16_nocheck)
lhu v0, 0(a0)
j ra
nop
END(dtrace_fuword16_nocheck)
/*
uint32_t
dtrace_fuword32_nocheck(void *addr)
*/
LEAF(dtrace_fuword32_nocheck)
lw v0, 0(a0)
j ra
nop
END(dtrace_fuword32_nocheck)
/*
uint64_t
dtrace_fuword64_nocheck(void *addr)
*/
LEAF(dtrace_fuword64_nocheck)
#if defined(__mips_n64) || defined(__mips_n32)
ld v0, 0(a0)
#else
lw v1,4(a0)
lw v0,0(a0)
#endif
j ra
nop
END(dtrace_fuword64_nocheck)
/*
XXX: unoptimized
void
dtrace_copy(uintptr_t src, uintptr_t dest, size_t size)
*/
LEAF(dtrace_copy)
1:
beqz a2, 2f
nop
lbu t0, 0(a0)
sb t0, 0(a1)
PTR_ADDU a0, a0, 1
PTR_ADDU a1, a1, 1
INT_SUBU a2, a2, 1
j 1b
nop
2:
j ra
nop
END(dtrace_copy)
/*
XXX: Unoptimized. Check for flags on page boundaries only(?)
void
dtrace_copystr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
*/
LEAF(dtrace_copystr)
1:
lbu t0, 0(a0)
sb t0, 0(a1)
PTR_ADDU a0, a0, 1
PTR_ADDU a1, a1, 1
INT_SUBU a2, a2, 1
beqz t0, 2f
nop
lhu t1, (a3)
and t1, t1, CPU_DTRACE_BADADDR
bnez t1, 2f
nop
bnez a2, 1b
nop
2:
j ra
nop
END(dtrace_copystr)
/*
uintptr_t
dtrace_caller(int aframes)
*/
LEAF(dtrace_caller)
li v0, -1
j ra
nop
END(dtrace_caller)
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