Atmosphere/stratosphere/boot/source/boot_pmc_wrapper.cpp
Michael Scire 609a302e16 os: implement waitable management.
This implements waitable management for Events (and
implements Events). It also refactors PM to use new
Event/Waitable semantics, and also adds STS_ASSERT
as a macro for asserting a boolean expression. The
rest of stratosphere has been refactored to use
STS_ASSERT whenever possible.
2019-12-07 12:41:28 -08:00

60 lines
1.9 KiB
C++

/*
* 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 "boot_pmc_wrapper.hpp"
namespace sts::boot {
namespace {
/* Convenience definitions. */
constexpr u32 SmcFunctionId_AtmosphereReadWriteRegister = 0xF0000002;
constexpr u32 PmcPhysStart = 0x7000E400;
constexpr u32 PmcPhysEnd = 0x7000EFFF;
/* Helpers. */
bool IsValidPmcAddress(u32 phys_addr) {
return (phys_addr & 3) == 0 && PmcPhysStart <= phys_addr && phys_addr <= PmcPhysEnd;
}
inline u32 SmcAtmosphereReadWriteRegister(u32 phys_addr, u32 value, u32 mask) {
SecmonArgs args;
args.X[0] = SmcFunctionId_AtmosphereReadWriteRegister;
args.X[1] = phys_addr;
args.X[2] = mask;
args.X[3] = value;
R_ASSERT(svcCallSecureMonitor(&args));
STS_ASSERT(args.X[0] == 0);
return static_cast<u32>(args.X[1]);
}
}
u32 ReadPmcRegister(u32 phys_addr) {
STS_ASSERT(IsValidPmcAddress(phys_addr));
return SmcAtmosphereReadWriteRegister(phys_addr, 0, 0);
}
void WritePmcRegister(u32 phys_addr, u32 value, u32 mask) {
STS_ASSERT(IsValidPmcAddress(phys_addr));
SmcAtmosphereReadWriteRegister(phys_addr, value, mask);
}
}