Atmosphere/stratosphere/libstratosphere/source/dd/dd_io_mappings.cpp

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/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
namespace ams::dd {
uintptr_t QueryIoMapping(uintptr_t phys_addr, size_t size) {
u64 virtual_addr;
const u64 aligned_addr = util::AlignDown(phys_addr, 0x1000);
const size_t offset = phys_addr - aligned_addr;
const u64 aligned_size = size + offset;
R_TRY_CATCH(svcQueryIoMapping(&virtual_addr, aligned_addr, aligned_size)) {
/* Official software handles this by returning 0. */
R_CATCH(svc::ResultNotFound) { return 0; }
} R_END_TRY_CATCH_WITH_ASSERT;
return static_cast<uintptr_t>(virtual_addr + offset);
}
namespace {
inline u32 ReadWriteRegisterImpl(uintptr_t phys_addr, u32 value, u32 mask) {
u32 out_value;
R_ASSERT(svcReadWriteRegister(&out_value, phys_addr, mask, value));
return out_value;
}
}
u32 ReadRegister(uintptr_t phys_addr) {
return ReadWriteRegisterImpl(phys_addr, 0, 0);
}
void WriteRegister(uintptr_t phys_addr, u32 value) {
ReadWriteRegisterImpl(phys_addr, value, ~u32());
}
u32 ReadWriteRegister(uintptr_t phys_addr, u32 value, u32 mask) {
return ReadWriteRegisterImpl(phys_addr, value, mask);
}
}