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authorAmlal El Mahrouss <amlal@nekernel.org>2025-05-29 10:51:53 +0200
committerGitHub <noreply@github.com>2025-05-29 10:51:53 +0200
commit5c0bb7ee7b1b0fee02cc179fb21f4c57a61d6c2d (patch)
treecb17577bcdc9714c97a84ce417a075117097f146 /dev/kernel/StorageKit/DmaPool.h
parentd608230b1350b064ceb01e6572519b108f6139b0 (diff)
parent3167f59dbb401d6a79b1524537e04218baf49ee3 (diff)
Merge pull request #32 from nekernel-org/dev
0.0.2e3
Diffstat (limited to 'dev/kernel/StorageKit/DmaPool.h')
-rw-r--r--dev/kernel/StorageKit/DmaPool.h92
1 files changed, 0 insertions, 92 deletions
diff --git a/dev/kernel/StorageKit/DmaPool.h b/dev/kernel/StorageKit/DmaPool.h
deleted file mode 100644
index a5d8c880..00000000
--- a/dev/kernel/StorageKit/DmaPool.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * Copyright (c) 2025 Amlal El Mahrouss. All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#pragma once
-
-#include <KernelKit/DebugOutput.h>
-
-#ifdef __NE_AMD64__
-#define NE_DMA_POOL_START (0x1000000)
-#define NE_DMA_POOL_SIZE (0x1000000)
-
-namespace Kernel {
-/// @brief DMA pool base pointer, here we're sure that AHCI or whatever tricky standard sees it.
-inline UInt8* kDmaPoolPtr = (UInt8*) NE_DMA_POOL_START;
-inline const UInt8* kDmaPoolEnd = (UInt8*) (NE_DMA_POOL_START + NE_DMA_POOL_SIZE);
-
-/***********************************************************************************/
-/// @brief allocate from the rtl_dma_alloc system.
-/// @param size the size of the chunk to allocate.
-/// @param align alignement of pointer.
-/***********************************************************************************/
-inline VoidPtr rtl_dma_alloc(SizeT size, SizeT align) {
- if (!size) {
- return nullptr;
- }
-
- UIntPtr addr = (UIntPtr) kDmaPoolPtr;
-
- /// here we just align the address according to a `align` variable, i'd rather be a power of two
- /// really.
- addr = (addr + (align - 1)) & ~(align - 1);
-
- if ((addr + size) >= reinterpret_cast<UIntPtr>(kDmaPoolEnd)) {
- kout << "DMA Pool is exhausted!\r";
-
- err_global_get() = kErrorDmaExhausted;
-
- return nullptr;
- }
-
- kDmaPoolPtr = (UInt8*) (addr + size);
- return (VoidPtr) addr;
-}
-
-/***********************************************************************************/
-/// @brief Free DMA pointer.
-/***********************************************************************************/
-inline Void rtl_dma_free(SizeT size) {
- if (!size) return;
-
- kDmaPoolPtr = (UInt8*) (kDmaPoolPtr - size);
-}
-
-/***********************************************************************************/
-/// @brief Flush DMA pointer.
-/***********************************************************************************/
-inline Void rtl_dma_flush(VoidPtr ptr, SizeT size_buffer) {
- if (ptr > (Void*) (NE_DMA_POOL_START + NE_DMA_POOL_SIZE)) {
- return;
- }
-
- if (!ptr) {
- return;
- }
-
- for (SizeT i = 0; i < size_buffer; ++i) {
- asm volatile("clflush (%0)" : : "r"((UInt8*) ptr + i) : "memory");
- }
-
- asm volatile("mfence" ::: "memory");
-}
-} // namespace Kernel
-#endif \ No newline at end of file