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https://github.com/Atmosphere-NX/Atmosphere.git
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77 lines
2.7 KiB
C++
77 lines
2.7 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 "../secmon_error.hpp"
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#include "../secmon_page_mapper.hpp"
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#include "secmon_smc_memory_access.hpp"
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namespace ams::secmon::smc {
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namespace {
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enum IramCopyType {
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IramCopyType_FromIramToDram = 0,
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IramCopyType_FromDramToIram = 1,
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IramCopyType_Count,
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};
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struct IramCopyOption {
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using CopyType = util::BitPack32::Field<0, 1, IramCopyType>;
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};
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}
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/* This is an atmosphere extension smc. */
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SmcResult SmcIramCopy(SmcArguments &args) {
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/* Decode arguments. */
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const uintptr_t dram_address = args.r[1];
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const uintptr_t iram_address = args.r[2];
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const size_t size = args.r[3];
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const util::BitPack32 option = { static_cast<u32>(args.r[4]) };
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const auto copy_type = option.Get<IramCopyOption::CopyType>();
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/* Validate arguments. */
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SMC_R_UNLESS(copy_type < IramCopyType_Count, InvalidArgument);
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{
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/* Map the pages. */
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AtmosphereUserPageMapper dram_mapper(dram_address);
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AtmosphereIramPageMapper iram_mapper(iram_address);
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SMC_R_UNLESS(dram_mapper.Map(), InvalidArgument);
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SMC_R_UNLESS(iram_mapper.Map(), InvalidArgument);
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/* Get the ranges we're copying. */
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const void * const src = (copy_type == IramCopyType_FromIramToDram) ? iram_mapper.GetPointerTo(iram_address, size) : dram_mapper.GetPointerTo(dram_address, size);
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void * const dst = (copy_type == IramCopyType_FromIramToDram) ? dram_mapper.GetPointerTo(dram_address, size) : iram_mapper.GetPointerTo(iram_address, size);
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SMC_R_UNLESS(src != nullptr, InvalidArgument);
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SMC_R_UNLESS(dst != nullptr, InvalidArgument);
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/* Copy the data. */
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std::memcpy(dst, src, size);
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}
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return SmcResult::Success;
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}
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SmcResult SmcWriteAddress(SmcArguments &args) {
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/* NOTE: This smc was deprecated in Atmosphère 0.13.0. */
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AMS_UNUSED(args);
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return SmcResult::NotSupported;
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}
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}
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