arch/riscv: Add include/arch/barrier.h
mb() is used in src/arch/riscv/ and src/mainboard/emulation/*-riscv/. It is currently provided by atomic.h, but I think it fits better into barrier.h. The "fence" instruction represents a full memory fence, as opposed to variants such as "fence r, rw" which represent a partial fence. An operating system might want to use precisely the right fence, but coreboot doesn't need this level of performance at the cost of simplicity. Change-Id: I8d33ef32ad31e8fda38f6a5183210e7bd6c65815 Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-on: https://review.coreboot.org/15830 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
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/*
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* This file is part of the coreboot project.
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*
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* Copyright 2014 Google Inc.
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* Copyright 2016 Jonathan Neuschäfer <j.neuschaefer@gmx.net>
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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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*/
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#ifndef __ARCH_BARRIER_H_
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#define __ARCH_BARRIER_H__
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static inline void mb(void) { asm volatile("fence"); }
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static inline void rmb(void) { asm volatile("fence"); }
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static inline void wmb(void) { asm volatile("fence"); }
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#endif /* __ARCH_BARRIER_H__ */
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@ -36,7 +36,6 @@
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typedef struct { int lock; } spinlock_t;
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#define SPINLOCK_INIT {0}
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#define mb() __sync_synchronize()
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#define atomic_set(ptr, val) (*(volatile typeof(*(ptr)) *)(ptr) = val)
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#define atomic_read(ptr) (*(volatile typeof(*(ptr)) *)(ptr))
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* GNU General Public License for more details.
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*/
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#include <vm.h>
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#include <arch/barrier.h>
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#include <arch/encoding.h>
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#include <atomic.h>
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#include <stdint.h>
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#include <console/console.h>
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#include <stdint.h>
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#include <vm.h>
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pte_t* root_page_table;
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@ -25,11 +25,12 @@
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* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#include <spike_util.h>
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#include <arch/barrier.h>
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#include <arch/errno.h>
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#include <atomic.h>
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#include <string.h>
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#include <console/console.h>
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#include <spike_util.h>
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#include <string.h>
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uintptr_t translate_address(uintptr_t vAddr) {
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// TODO: implement the page table translation algorithm
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@ -26,6 +26,7 @@
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*/
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#include <spike_util.h>
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#include <arch/barrier.h>
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#include <arch/errno.h>
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#include <atomic.h>
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#include <string.h>
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