mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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110 lines
4 KiB
C++
110 lines
4 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <exosphere.hpp>
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#include "fatal_device_page_table.hpp"
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namespace ams::secmon::fatal {
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namespace {
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constexpr inline auto Port = sdmmc::Port_SdCard0;
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ALWAYS_INLINE u8 *GetSdCardWorkBuffer() {
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return MemoryRegionVirtualDramSdmmcMappedData.GetPointer<u8>() + MemoryRegionVirtualDramSdmmcMappedData.GetSize() - mmu::PageSize;
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}
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ALWAYS_INLINE u8 *GetSdCardDmaBuffer() {
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return MemoryRegionVirtualDramSdmmcMappedData.GetPointer<u8>();
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}
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constexpr inline size_t SdCardDmaBufferSize = MemoryRegionVirtualDramSdmmcMappedData.GetSize() - mmu::PageSize;
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constexpr inline size_t SdCardDmaBufferSectors = SdCardDmaBufferSize / sdmmc::SectorSize;
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static_assert(util::IsAligned(SdCardDmaBufferSize, sdmmc::SectorSize));
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}
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Result InitializeSdCard() {
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/* Map main memory for the sdmmc device. */
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InitializeDevicePageTableForSdmmc1();
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/* Initialize sdmmc library. */
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sdmmc::Initialize(Port);
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sdmmc::SetSdCardWorkBuffer(Port, GetSdCardWorkBuffer(), sdmmc::SdCardWorkBufferSize);
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//sdmmc::Deactivate(Port);
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R_TRY(sdmmc::Activate(Port));
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return ResultSuccess();
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}
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Result CheckSdCardConnection(sdmmc::SpeedMode *out_sm, sdmmc::BusWidth *out_bw) {
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return sdmmc::CheckSdCardConnection(out_sm, out_bw, Port);
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}
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Result ReadSdCard(void *dst, size_t size, size_t sector_index, size_t sector_count) {
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/* Validate that our buffer is valid. */
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AMS_ASSERT(size >= sector_count * sdmmc::SectorSize);
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AMS_UNUSED(size);
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/* Repeatedly read sectors. */
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u8 *dst_u8 = static_cast<u8 *>(dst);
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void * const dma_buffer = GetSdCardDmaBuffer();
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while (sector_count > 0) {
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/* Read sectors into the DMA buffer. */
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const size_t cur_sectors = std::min(sector_count, SdCardDmaBufferSectors);
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const size_t cur_size = cur_sectors * sdmmc::SectorSize;
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R_TRY(sdmmc::Read(dma_buffer, cur_size, Port, sector_index, cur_sectors));
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/* Copy data from the DMA buffer to the output. */
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std::memcpy(dst_u8, dma_buffer, cur_size);
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/* Advance. */
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dst_u8 += cur_size;
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sector_index += cur_sectors;
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sector_count -= cur_sectors;
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}
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return ResultSuccess();
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}
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Result WriteSdCard(size_t sector_index, size_t sector_count, const void *src, size_t size) {
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/* Validate that our buffer is valid. */
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AMS_ASSERT(size >= sector_count * sdmmc::SectorSize);
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AMS_UNUSED(size);
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/* Repeatedly read sectors. */
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const u8 *src_u8 = static_cast<const u8 *>(src);
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void * const dma_buffer = GetSdCardDmaBuffer();
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while (sector_count > 0) {
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/* Copy sectors into the DMA buffer. */
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const size_t cur_sectors = std::min(sector_count, SdCardDmaBufferSectors);
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const size_t cur_size = cur_sectors * sdmmc::SectorSize;
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std::memcpy(dma_buffer, src_u8, cur_size);
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/* Write sectors to the sd card. */
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R_TRY(sdmmc::Write(Port, sector_index, cur_sectors, dma_buffer, cur_size));
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/* Advance. */
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src_u8 += cur_size;
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sector_index += cur_sectors;
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sector_count -= cur_sectors;
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}
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return ResultSuccess();
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}
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}
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