diff options
Diffstat (limited to 'sys/cddl/dev/dtrace/mips/dtrace_asm.S')
| -rw-r--r-- | sys/cddl/dev/dtrace/mips/dtrace_asm.S | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/sys/cddl/dev/dtrace/mips/dtrace_asm.S b/sys/cddl/dev/dtrace/mips/dtrace_asm.S new file mode 100644 index 000000000000..b40336c0f114 --- /dev/null +++ b/sys/cddl/dev/dtrace/mips/dtrace_asm.S @@ -0,0 +1,234 @@ +/* + * 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> + + .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) |