mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-26 22:02:15 +00:00
46 lines
2 KiB
C++
46 lines
2 KiB
C++
/*
|
|
* 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>
|
|
#include "warmboot_clkrst.hpp"
|
|
|
|
namespace ams::warmboot {
|
|
|
|
namespace {
|
|
|
|
constexpr inline const uintptr_t CLKRST = secmon::MemoryRegionPhysicalDeviceClkRst.GetAddress();
|
|
constexpr inline const uintptr_t PMC = secmon::MemoryRegionPhysicalDevicePmc.GetAddress();
|
|
constexpr inline const uintptr_t TIMER = secmon::MemoryRegionPhysicalDeviceTimer.GetAddress();
|
|
|
|
}
|
|
|
|
void ConfigureOscillators() {
|
|
/* Enable the crystal oscillator, and copy the drive strength from pmc. */
|
|
const auto xofs = reg::GetValue(PMC + APBDEV_PMC_OSC_EDPD_OVER, PMC_REG_BITS_MASK(OSC_EDPD_OVER_XOFS));
|
|
|
|
reg::ReadWrite(CLKRST + CLK_RST_CONTROLLER_OSC_CTRL, CLK_RST_REG_BITS_ENUM (OSC_CTRL_XOE, ENABLE),
|
|
CLK_RST_REG_BITS_VALUE(OSC_CTRL_XOFS, xofs));
|
|
|
|
/* Configure CLK_M_DIVISOR to 2. */
|
|
reg::Write(CLKRST + CLK_RST_CONTROLLER_SPARE_REG0, CLK_RST_REG_BITS_ENUM(SPARE_REG0_CLK_M_DIVISOR, CLK_M_DIVISOR2));
|
|
reg::Read(CLKRST + CLK_RST_CONTROLLER_SPARE_REG0);
|
|
|
|
/* Restore TIMERUS config to 19.2 MHz. */
|
|
reg::Write(TIMER + TIMERUS_USEC_CFG, TIMER_REG_BITS_VALUE(USEC_CFG_USEC_DIVIDEND, 5 - 1),
|
|
TIMER_REG_BITS_VALUE(USEC_CFG_USEC_DIVISOR, 96 - 1));
|
|
|
|
}
|
|
|
|
}
|