Maneesh Gupta
99 righe
3.1 KiB
C++
99 righe
3.1 KiB
C++
/*
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Copyright (c) 2015-2017 Advanced Micro Devices, Inc. All rights reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include <hc.hpp>
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#include <grid_launch.h>
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#include <hc_math.hpp>
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#include "device_util.h"
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#include "hip/hcc_detail/device_functions.h"
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#include "hip/hip_runtime.h"
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#include <atomic>
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//=================================================================================================
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/*
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Implementation of malloc and free device functions.
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This is the best place to put them because the device
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global variables need to be initialized at the start.
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*/
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__device__ char gpuHeap[SIZE_OF_HEAP];
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__device__ uint32_t gpuFlags[NUM_PAGES];
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__device__ void* __hip_hc_malloc(size_t size) {
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char* heap = (char*)gpuHeap;
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if (size > SIZE_OF_HEAP) {
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return (void*)nullptr;
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}
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uint32_t totalThreads =
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blockDim.x * gridDim.x * blockDim.y * gridDim.y * blockDim.z * gridDim.z;
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uint32_t currentWorkItem = threadIdx.x + blockDim.x * blockIdx.x;
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uint32_t numHeapsPerWorkItem = NUM_PAGES / totalThreads;
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uint32_t heapSizePerWorkItem = SIZE_OF_HEAP / totalThreads;
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uint32_t stride = size / SIZE_OF_PAGE;
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uint32_t start = numHeapsPerWorkItem * currentWorkItem;
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uint32_t k = 0;
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while (gpuFlags[k] > 0) {
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k++;
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}
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for (uint32_t i = 0; i < stride - 1; i++) {
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gpuFlags[i + start + k] = 1;
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}
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gpuFlags[start + stride - 1 + k] = 2;
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void* ptr = (void*)(heap + heapSizePerWorkItem * currentWorkItem + k * SIZE_OF_PAGE);
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return ptr;
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}
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__device__ void* __hip_hc_free(void* ptr) {
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if (ptr == nullptr) {
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return nullptr;
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}
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uint32_t offsetByte = (uint64_t)ptr - (uint64_t)gpuHeap;
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uint32_t offsetPage = offsetByte / SIZE_OF_PAGE;
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while (gpuFlags[offsetPage] != 0) {
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if (gpuFlags[offsetPage] == 2) {
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gpuFlags[offsetPage] = 0;
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offsetPage++;
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break;
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} else {
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gpuFlags[offsetPage] = 0;
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offsetPage++;
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}
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}
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return nullptr;
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}
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// abort
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__device__ void abort() { return hc::abort(); }
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__host__ void* __get_dynamicgroupbaseptr() { return nullptr; }
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