/* * 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 #include #ifdef CONFIG_ROCKCREEK #include #endif #ifdef __cplusplus extern "C" { #endif #ifdef CONFIG_ROCKCREEK //#define SVM_WB #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); /** @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); /** @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); #ifdef CONFIG_ROCKCREEK /* @brief invalidate the cache entries for all SVM regions */ #ifndef SVM_WB static inline void svm_invalidate(void) { asm volatile ( ".byte 0x0f; .byte 0x0a;\n" ); // CL1FLUSHMB } #else void svm_invalidate(void); #endif /* @brief flushs the cache for all SVM regions */ #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; } #else void svm_flush(size_t addr); #endif #endif /* @brief dumps the some performance counters (e.g. numbers of page migrations) * * @retrun * - 0 on success */ int svm_statistics(void); #endif #ifdef __cplusplus } #endif #endif