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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/armreg.h>
#include <machine/asm.h>
#include "assym.s"
/*
void dtrace_membar_producer(void)
*/
ENTRY(dtrace_membar_producer)
RET
END(dtrace_membar_producer)
/*
void dtrace_membar_consumer(void)
*/
ENTRY(dtrace_membar_consumer)
RET
END(dtrace_membar_consumer)
/*
dtrace_icookie_t dtrace_interrupt_disable(void)
*/
ENTRY(dtrace_interrupt_disable)
msr daifset, #2
RET
END(dtrace_interrupt_disable)
/*
void dtrace_interrupt_enable(dtrace_icookie_t cookie)
*/
ENTRY(dtrace_interrupt_enable)
msr daifclr, #2
RET
END(dtrace_interrupt_enable)
/*
uint8_t
dtrace_fuword8_nocheck(void *addr)
*/
ENTRY(dtrace_fuword8_nocheck)
ldrb w0, [x0]
RET
END(dtrace_fuword8_nocheck)
/*
uint16_t
dtrace_fuword16_nocheck(void *addr)
*/
ENTRY(dtrace_fuword16_nocheck)
ldrh w0, [x0]
RET
END(dtrace_fuword16_nocheck)
/*
uint32_t
dtrace_fuword32_nocheck(void *addr)
*/
ENTRY(dtrace_fuword32_nocheck)
ldr w0, [x0]
RET
END(dtrace_fuword32_nocheck)
/*
uint64_t
dtrace_fuword64_nocheck(void *addr)
*/
ENTRY(dtrace_fuword64_nocheck)
ldr x0, [x0]
RET
END(dtrace_fuword64_nocheck)
/*
void
dtrace_copy(uintptr_t uaddr, uintptr_t kaddr, size_t size)
*/
ENTRY(dtrace_copy)
cbz x2, 2f /* If len == 0 then skip loop */
1:
ldrb w4, [x0], #1 /* Load from uaddr */
strb w4, [x1], #1 /* Store in kaddr */
sub x2, x2, #1 /* len-- */
cbnz x2, 1b
2:
RET
END(dtrace_copy)
/*
void
dtrace_copystr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
XXX: Check for flags?
*/
ENTRY(dtrace_copystr)
cbz x2, 2f /* If len == 0 then skip loop */
1: ldrb w4, [x0], #1 /* Load from uaddr */
strb w4, [x1], #1 /* Store in kaddr */
cbz w4, 2f /* If == 0 then break */
sub x2, x2, #1 /* len-- */
cbnz x2, 1b
2:
RET
END(dtrace_copystr)
/*
uintptr_t
dtrace_caller(int aframes)
*/
ENTRY(dtrace_caller)
mov x0, #-1
RET
END(dtrace_caller)
/*
uint32_t
dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new)
*/
ENTRY(dtrace_cas32)
1: ldxr w3, [x0] /* Load target */
cmp w3, w1 /* Check if *target == cmp */
bne 2f /* No, return */
stxr w12, w2, [x0] /* Store new to target */
cbnz w12, 1b /* Try again if store not succeed */
2: mov w0, w3 /* Return the value loaded from target */
RET
END(dtrace_cas32)
/*
void *
dtrace_casptr(volatile void *target, volatile void *cmp, volatile void *new)
*/
ENTRY(dtrace_casptr)
1: ldxr x3, [x0] /* Load target */
cmp x3, x1 /* Check if *target == cmp */
bne 2f /* No, return */
stxr w12, x2, [x0] /* Store new to target */
cbnz w12, 1b /* Try again if store not succeed */
2: mov x0, x3 /* Return the value loaded from target */
RET
END(dtrace_casptr)
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