metalsvm/arch/x86/include/asm/svm.h

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/*
* Copyright 2011 Stefan Lankes, Chair for Operating Systems,
* RWTH Aachen University
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file is part of MetalSVM.
*/
#ifndef __ARCH_SVM_H__
#define __ARCH_SVM_H__
#include <metalsvm/stddef.h>
#include <asm/page.h>
#ifdef CONFIG_ROCKCREEK
#include <asm/RCCE_lib.h>
#endif
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#ifdef __cplusplus
extern "C" {
#endif
#ifdef CONFIG_ROCKCREEK
//#define SVM_WB
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#define SVM_STRONG (1 << 0)
#define SVM_LAZYRELEASE (1 << 1)
#define SVM_L2 (1 << 4)
#define SVM_STRONG_L2 SVM_STRONG|SVM_L2
#define SVM_LAZYRELEASE_L2 SVM_LAZYRELEASE|SVM_L2
/** @brief Init routine of the SVM subsystem
*
* @return
* - 0 on success
* - -ENOMEM not enough memory
*/
int svm_init(void);
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/** @brief Memory allocator of the SVM subsystem.
*
* Like RCCE function, belongs svmmalloc to the synchronous
* function.
*
* @return Pointer to the new memory range
*/
void* svm_malloc(size_t size, uint32_t flags);
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/** @brief Frees memory, which is managed by the SVM subsystem
*
* Like RCCE function, belongs svmfree to the synchronous function.
*/
void svm_free(void* addr, size_t size);
int svm_barrier(uint32_t flags);
/** @brief Request for exlusive access
*
* @return
* - 0 on success
*/
int svm_access_request(size_t addr);
/** @brief Allocate n shared pages
*
* @param n number of requested pages
* @return physical address of the shared pages
*/
size_t shmalloc(uint32_t n);
int svm_alloc_page(size_t addr, page_table_t* pgt);
/** @brief emit page to core ue
*
* @return
* - 0 on success
*/
int svm_emit_page(size_t addr, int ue);
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#ifdef CONFIG_ROCKCREEK
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/* @brief invalidate the cache entries for all SVM regions
*/
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#ifndef SVM_WB
static inline void svm_invalidate(void)
{
asm volatile ( ".byte 0x0f; .byte 0x0a;\n" ); // CL1FLUSHMB
}
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#else
void svm_invalidate(void);
#endif
/* @brief flushs the cache for all SVM regions
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*/
#ifndef SVM_WB
static inline void svm_flush(size_t unused)
{
// need to write to another line to make sure the write combine buffer gets flushed
*(volatile int *)RCCE_fool_write_combine_buffer = 1;
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}
#else
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void svm_flush(size_t addr);
#endif
#endif
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/* @brief dumps the some performance counters (e.g. numbers of page migrations)
*
* @retrun
* - 0 on success
*/
int svm_statistics(void);
#endif
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#ifdef __cplusplus
}
#endif
#endif