45d426a34e
mips32r2 and mips64r2 (and close relatives) processors. There presently is support for ADMtek ADM5120, A mips 4Kc in a malta board, the RB533 routerboard (based on IDT RC32434) and some preliminary support for sibtye/broadcom designs. Other hardware support will be forthcomcing. This port boots multiuser under gxemul emulating the malta board and also bootstraps on the hardware whose support is forthcoming... Oleksandr Tymoshenko, Wojciech Koszek, Warner Losh, Olivier Houchard, Randall Stewert and others that have contributed to the mips2 and/or mips2-jnpr perforce branches. Juniper contirbuted a generic mips port late in the life cycle of the misp2 branch. Warner Losh merged the mips2 and Juniper code bases, and others list above have worked for the past several months to get to multiuser. In addition, the mips2 work owe a debt to the trail blazing efforts of the original mips branch in perforce done by Juli Mallett.
442 lines
14 KiB
C
442 lines
14 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: src/sys/alpha/include/atomic.h,v 1.21.2.3 2005/10/06 18:12:05 jhb
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* $FreeBSD$
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*/
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#ifndef _MACHINE_ATOMIC_H_
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#define _MACHINE_ATOMIC_H_
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#ifndef _SYS_CDEFS_H_
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#error this file needs sys/cdefs.h as a prerequisite
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#endif
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static __inline void
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mips_sync(void)
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{
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__asm __volatile (".set noreorder\n\t"
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"sync\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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"nop\n\t"
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".set reorder\n"
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: : : "memory");
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}
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/*
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* Various simple arithmetic on memory which is atomic in the presence
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* of interrupts and SMP safe.
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*/
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void atomic_set_8(__volatile uint8_t *, uint8_t);
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void atomic_clear_8(__volatile uint8_t *, uint8_t);
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void atomic_add_8(__volatile uint8_t *, uint8_t);
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void atomic_subtract_8(__volatile uint8_t *, uint8_t);
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void atomic_set_16(__volatile uint16_t *, uint16_t);
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void atomic_clear_16(__volatile uint16_t *, uint16_t);
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void atomic_add_16(__volatile uint16_t *, uint16_t);
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void atomic_subtract_16(__volatile uint16_t *, uint16_t);
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static __inline void
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atomic_set_32(__volatile uint32_t *p, uint32_t v)
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{
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uint32_t temp;
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__asm __volatile (
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"1:\tll %0, %3\n\t" /* load old value */
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"or %0, %2, %0\n\t" /* calculate new value */
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"sc %0, %1\n\t" /* attempt to store */
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"beqz %0, 1b\n\t" /* spin if failed */
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: "=&r" (temp), "=m" (*p)
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: "r" (v), "m" (*p)
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: "memory");
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}
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static __inline void
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atomic_clear_32(__volatile uint32_t *p, uint32_t v)
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{
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uint32_t temp;
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v = ~v;
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__asm __volatile (
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"1:\tll %0, %3\n\t" /* load old value */
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"and %0, %2, %0\n\t" /* calculate new value */
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"sc %0, %1\n\t" /* attempt to store */
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"beqz %0, 1b\n\t" /* spin if failed */
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: "=&r" (temp), "=m" (*p)
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: "r" (v), "m" (*p)
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: "memory");
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}
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static __inline void
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atomic_add_32(__volatile uint32_t *p, uint32_t v)
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{
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uint32_t temp;
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__asm __volatile (
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"1:\tll %0, %3\n\t" /* load old value */
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"addu %0, %2, %0\n\t" /* calculate new value */
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"sc %0, %1\n\t" /* attempt to store */
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"beqz %0, 1b\n\t" /* spin if failed */
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: "=&r" (temp), "=m" (*p)
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: "r" (v), "m" (*p)
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: "memory");
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}
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static __inline void
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atomic_subtract_32(__volatile uint32_t *p, uint32_t v)
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{
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uint32_t temp;
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__asm __volatile (
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"1:\tll %0, %3\n\t" /* load old value */
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"subu %0, %2\n\t" /* calculate new value */
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"sc %0, %1\n\t" /* attempt to store */
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"beqz %0, 1b\n\t" /* spin if failed */
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: "=&r" (temp), "=m" (*p)
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: "r" (v), "m" (*p)
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: "memory");
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}
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static __inline uint32_t
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atomic_readandclear_32(__volatile uint32_t *addr)
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{
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uint32_t result,temp;
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__asm __volatile (
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"1:\tll %0,%3\n\t" /* load current value, asserting lock */
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"li %1,0\n\t" /* value to store */
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"sc %1,%2\n\t" /* attempt to store */
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"beqz %1, 1b\n\t" /* if the store failed, spin */
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: "=&r"(result), "=&r"(temp), "=m" (*addr)
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: "m" (*addr)
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: "memory");
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return result;
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}
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static __inline uint32_t
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atomic_readandset_32(__volatile uint32_t *addr, uint32_t value)
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{
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uint32_t result,temp;
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__asm __volatile (
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"1:\tll %0,%3\n\t" /* load current value, asserting lock */
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"or %1,$0,%4\n\t"
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"sc %1,%2\n\t" /* attempt to store */
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"beqz %1, 1b\n\t" /* if the store failed, spin */
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: "=&r"(result), "=&r"(temp), "=m" (*addr)
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: "m" (*addr), "r" (value)
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: "memory");
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return result;
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}
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#define ATOMIC_ACQ_REL(NAME, WIDTH) \
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static __inline void \
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atomic_##NAME##_acq_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
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{ \
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atomic_##NAME##_##WIDTH(p, v); \
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mips_sync(); \
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} \
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\
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static __inline void \
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atomic_##NAME##_rel_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
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{ \
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mips_sync(); \
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atomic_##NAME##_##WIDTH(p, v); \
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}
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/* Variants of simple arithmetic with memory barriers. */
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ATOMIC_ACQ_REL(set, 8)
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ATOMIC_ACQ_REL(clear, 8)
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ATOMIC_ACQ_REL(add, 8)
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ATOMIC_ACQ_REL(subtract, 8)
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ATOMIC_ACQ_REL(set, 16)
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ATOMIC_ACQ_REL(clear, 16)
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ATOMIC_ACQ_REL(add, 16)
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ATOMIC_ACQ_REL(subtract, 16)
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ATOMIC_ACQ_REL(set, 32)
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ATOMIC_ACQ_REL(clear, 32)
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ATOMIC_ACQ_REL(add, 32)
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ATOMIC_ACQ_REL(subtract, 32)
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#if 0
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ATOMIC_ACQ_REL(set, 64)
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ATOMIC_ACQ_REL(clear, 64)
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ATOMIC_ACQ_REL(add, 64)
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ATOMIC_ACQ_REL(subtract, 64)
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#endif
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#undef ATOMIC_ACQ_REL
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/*
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* We assume that a = b will do atomic loads and stores.
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*/
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#define ATOMIC_STORE_LOAD(WIDTH) \
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static __inline uint##WIDTH##_t \
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atomic_load_acq_##WIDTH(__volatile uint##WIDTH##_t *p) \
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{ \
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uint##WIDTH##_t v; \
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\
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v = *p; \
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mips_sync(); \
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return (v); \
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} \
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\
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static __inline void \
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atomic_store_rel_##WIDTH(__volatile uint##WIDTH##_t *p, uint##WIDTH##_t v)\
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{ \
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mips_sync(); \
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*p = v; \
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}
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ATOMIC_STORE_LOAD(32)
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ATOMIC_STORE_LOAD(64)
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void atomic_store_64 (__volatile uint64_t *, uint64_t *);
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void atomic_load_64 (__volatile uint64_t *, uint64_t *);
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#undef ATOMIC_STORE_LOAD
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/*
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* Atomically compare the value stored at *p with cmpval and if the
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* two values are equal, update the value of *p with newval. Returns
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* zero if the compare failed, nonzero otherwise.
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*/
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static __inline uint32_t
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atomic_cmpset_32(__volatile uint32_t* p, uint32_t cmpval, uint32_t newval)
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{
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uint32_t ret;
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__asm __volatile (
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"1:\tll %0, %4\n\t" /* load old value */
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"bne %0, %2, 2f\n\t" /* compare */
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"move %0, %3\n\t" /* value to store */
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"sc %0, %1\n\t" /* attempt to store */
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"beqz %0, 1b\n\t" /* if it failed, spin */
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"j 3f\n\t"
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"2:\n\t"
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"li %0, 0\n\t"
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"3:\n"
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: "=&r" (ret), "=m" (*p)
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: "r" (cmpval), "r" (newval), "m" (*p)
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: "memory");
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return ret;
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}
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/*
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* Atomically compare the value stored at *p with cmpval and if the
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* two values are equal, update the value of *p with newval. Returns
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* zero if the compare failed, nonzero otherwise.
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*/
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static __inline uint32_t
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atomic_cmpset_acq_32(__volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
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{
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int retval;
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retval = atomic_cmpset_32(p, cmpval, newval);
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mips_sync();
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return (retval);
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}
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static __inline uint32_t
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atomic_cmpset_rel_32(__volatile uint32_t *p, uint32_t cmpval, uint32_t newval)
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{
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mips_sync();
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return (atomic_cmpset_32(p, cmpval, newval));
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}
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/*
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* Atomically add the value of v to the integer pointed to by p and return
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* the previous value of *p.
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*/
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static __inline uint32_t
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atomic_fetchadd_32(__volatile uint32_t *p, uint32_t v)
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{
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uint32_t value, temp;
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__asm __volatile (
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"1:\tll %0, %1\n\t" /* load old value */
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"addu %2, %3, %0\n\t" /* calculate new value */
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"sc %2, %1\n\t" /* attempt to store */
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"beqz %2, 1b\n\t" /* spin if failed */
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: "=&r" (value), "=m" (*p), "=r" (temp)
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: "r" (v), "m" (*p));
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return (value);
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}
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/* Operations on chars. */
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#define atomic_set_char atomic_set_8
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#define atomic_set_acq_char atomic_set_acq_8
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#define atomic_set_rel_char atomic_set_rel_8
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#define atomic_clear_char atomic_clear_8
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#define atomic_clear_acq_char atomic_clear_acq_8
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#define atomic_clear_rel_char atomic_clear_rel_8
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#define atomic_add_char atomic_add_8
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#define atomic_add_acq_char atomic_add_acq_8
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#define atomic_add_rel_char atomic_add_rel_8
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#define atomic_subtract_char atomic_subtract_8
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#define atomic_subtract_acq_char atomic_subtract_acq_8
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#define atomic_subtract_rel_char atomic_subtract_rel_8
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/* Operations on shorts. */
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#define atomic_set_short atomic_set_16
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#define atomic_set_acq_short atomic_set_acq_16
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#define atomic_set_rel_short atomic_set_rel_16
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#define atomic_clear_short atomic_clear_16
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#define atomic_clear_acq_short atomic_clear_acq_16
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#define atomic_clear_rel_short atomic_clear_rel_16
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#define atomic_add_short atomic_add_16
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#define atomic_add_acq_short atomic_add_acq_16
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#define atomic_add_rel_short atomic_add_rel_16
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#define atomic_subtract_short atomic_subtract_16
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#define atomic_subtract_acq_short atomic_subtract_acq_16
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#define atomic_subtract_rel_short atomic_subtract_rel_16
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/* Operations on ints. */
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#define atomic_set_int atomic_set_32
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#define atomic_set_acq_int atomic_set_acq_32
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#define atomic_set_rel_int atomic_set_rel_32
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#define atomic_clear_int atomic_clear_32
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#define atomic_clear_acq_int atomic_clear_acq_32
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#define atomic_clear_rel_int atomic_clear_rel_32
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#define atomic_add_int atomic_add_32
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#define atomic_add_acq_int atomic_add_acq_32
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#define atomic_add_rel_int atomic_add_rel_32
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#define atomic_subtract_int atomic_subtract_32
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#define atomic_subtract_acq_int atomic_subtract_acq_32
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#define atomic_subtract_rel_int atomic_subtract_rel_32
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#define atomic_cmpset_int atomic_cmpset_32
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#define atomic_cmpset_acq_int atomic_cmpset_acq_32
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#define atomic_cmpset_rel_int atomic_cmpset_rel_32
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#define atomic_load_acq_int atomic_load_acq_32
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#define atomic_store_rel_int atomic_store_rel_32
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#define atomic_readandclear_int atomic_readandclear_32
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#define atomic_readandset_int atomic_readandset_32
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#define atomic_fetchadd_int atomic_fetchadd_32
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#ifdef __mips64
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/* Operations on longs. */
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#define atomic_set_long atomic_set_64
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#define atomic_set_acq_long atomic_set_acq_64
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#define atomic_set_rel_long atomic_set_rel_64
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#define atomic_clear_long atomic_clear_64
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#define atomic_clear_acq_long atomic_clear_acq_64
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#define atomic_clear_rel_long atomic_clear_rel_64
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#define atomic_add_long atomic_add_64
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#define atomic_add_acq_long atomic_add_acq_64
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#define atomic_add_rel_long atomic_add_rel_64
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#define atomic_subtract_long atomic_subtract_64
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#define atomic_subtract_acq_long atomic_subtract_acq_64
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#define atomic_subtract_rel_long atomic_subtract_rel_64
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#define atomic_cmpset_long atomic_cmpset_64
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#define atomic_cmpset_acq_long atomic_cmpset_acq_64
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#define atomic_cmpset_rel_long atomic_cmpset_rel_64
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#define atomic_load_acq_long atomic_load_acq_64
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#define atomic_store_rel_long atomic_store_rel_64
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#define atomic_fetchadd_long atomic_fetchadd_64
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#define atomic_readandclear_long atomic_readandclear_64
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/* Operations on pointers. */
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#define atomic_set_ptr atomic_set_64
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#define atomic_set_acq_ptr atomic_set_acq_64
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#define atomic_set_rel_ptr atomic_set_rel_64
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#define atomic_clear_ptr atomic_clear_64
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#define atomic_clear_acq_ptr atomic_clear_acq_64
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#define atomic_clear_rel_ptr atomic_clear_rel_64
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#define atomic_add_ptr atomic_add_64
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#define atomic_add_acq_ptr atomic_add_acq_64
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#define atomic_add_rel_ptr atomic_add_rel_64
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#define atomic_subtract_ptr atomic_subtract_64
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#define atomic_subtract_acq_ptr atomic_subtract_acq_64
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#define atomic_subtract_rel_ptr atomic_subtract_rel_64
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#define atomic_cmpset_ptr atomic_cmpset_64
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#define atomic_cmpset_acq_ptr atomic_cmpset_acq_64
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#define atomic_cmpset_rel_ptr atomic_cmpset_rel_64
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#define atomic_load_acq_ptr atomic_load_acq_64
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#define atomic_store_rel_ptr atomic_store_rel_64
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#define atomic_readandclear_ptr atomic_readandclear_64
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#else /* __mips64 */
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/* Operations on longs. */
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#define atomic_set_long atomic_set_32
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#define atomic_set_acq_long atomic_set_acq_32
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#define atomic_set_rel_long atomic_set_rel_32
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#define atomic_clear_long atomic_clear_32
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#define atomic_clear_acq_long atomic_clear_acq_32
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#define atomic_clear_rel_long atomic_clear_rel_32
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#define atomic_add_long(p, v) \
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atomic_add_32((volatile u_int *)(p), (u_int)(v))
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#define atomic_add_acq_long atomic_add_acq_32
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#define atomic_add_rel_long atomic_add_rel_32
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#define atomic_subtract_long(p, v) \
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atomic_subtract_32((volatile u_int *)(p), (u_int)(v))
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#define atomic_subtract_acq_long atomic_subtract_acq_32
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#define atomic_subtract_rel_long atomic_subtract_rel_32
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#define atomic_cmpset_long atomic_cmpset_32
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#define atomic_cmpset_acq_long(p, cmpval, newval) \
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atomic_cmpset_acq_32((volatile u_int *)(p), \
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(u_int)(cmpval), (u_int)(newval))
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#define atomic_cmpset_rel_long(p, cmpval, newval) \
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atomic_cmpset_rel_32((volatile u_int *)(p), \
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(u_int)(cmpval), (u_int)(newval))
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#define atomic_load_acq_long atomic_load_acq_32
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#define atomic_store_rel_long atomic_store_rel_32
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#define atomic_fetchadd_long(p, v) \
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atomic_fetchadd_32((volatile u_int *)(p), (u_int)(v))
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#define atomic_readandclear_long atomic_readandclear_32
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/* Operations on pointers. */
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#define atomic_set_ptr atomic_set_32
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#define atomic_set_acq_ptr atomic_set_acq_32
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#define atomic_set_rel_ptr atomic_set_rel_32
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#define atomic_clear_ptr atomic_clear_32
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#define atomic_clear_acq_ptr atomic_clear_acq_32
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#define atomic_clear_rel_ptr atomic_clear_rel_32
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#define atomic_add_ptr atomic_add_32
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#define atomic_add_acq_ptr atomic_add_acq_32
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#define atomic_add_rel_ptr atomic_add_rel_32
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#define atomic_subtract_ptr atomic_subtract_32
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#define atomic_subtract_acq_ptr atomic_subtract_acq_32
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#define atomic_subtract_rel_ptr atomic_subtract_rel_32
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#define atomic_cmpset_ptr atomic_cmpset_32
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#define atomic_cmpset_acq_ptr atomic_cmpset_acq_32
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#define atomic_cmpset_rel_ptr atomic_cmpset_rel_32
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#define atomic_load_acq_ptr atomic_load_acq_32
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#define atomic_store_rel_ptr atomic_store_rel_32
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#define atomic_readandclear_ptr atomic_readandclear_32
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#endif /* __mips64 */
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#endif /* ! _MACHINE_ATOMIC_H_ */
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