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Atmosphere/libraries/libexosphere/source/flow/flow_api.cpp
2020-06-14 22:07:45 -07:00

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/*
* Copyright (c) 2018-2020 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 <exosphere.hpp>
namespace ams::flow {
namespace {
struct FlowControllerRegisterOffset {
u16 cpu_csr;
u16 halt_cpu_events;
u16 cc4_core_ctrl;
};
constinit uintptr_t g_register_address = secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress();
constexpr const FlowControllerRegisterOffset FlowControllerRegisterOffsets[] = {
{ FLOW_CTLR_CPU0_CSR, FLOW_CTLR_HALT_CPU0_EVENTS, FLOW_CTLR_CC4_CORE0_CTRL, },
{ FLOW_CTLR_CPU1_CSR, FLOW_CTLR_HALT_CPU1_EVENTS, FLOW_CTLR_CC4_CORE1_CTRL, },
{ FLOW_CTLR_CPU2_CSR, FLOW_CTLR_HALT_CPU2_EVENTS, FLOW_CTLR_CC4_CORE2_CTRL, },
{ FLOW_CTLR_CPU3_CSR, FLOW_CTLR_HALT_CPU3_EVENTS, FLOW_CTLR_CC4_CORE3_CTRL, },
};
}
void SetRegisterAddress(uintptr_t address) {
g_register_address = address;
}
void ResetCpuRegisters(int core) {
AMS_ASSUME(core >= 0);
const auto &offsets = FlowControllerRegisterOffsets[core];
reg::Write(g_register_address + offsets.cpu_csr, 0);
reg::Write(g_register_address + offsets.halt_cpu_events, 0);
}
}