Atmosphere/libraries/libmesosphere/source/arch/arm/kern_generic_interrupt_controller.inc

198 lines
7 KiB
PHP
Raw Normal View History

/*
* 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 <mesosphere.hpp>
namespace ams::kern::arch::arm {
void KInterruptController::SetupInterruptLines(s32 core_id) const {
const size_t ITLines = (core_id == 0) ? 32 * ((this->gicd->typer & 0x1F) + 1) : NumLocalInterrupts;
for (size_t i = 0; i < ITLines / 32; i++) {
this->gicd->icenabler[i] = 0xFFFFFFFF;
this->gicd->icpendr[i] = 0xFFFFFFFF;
this->gicd->icactiver[i] = 0xFFFFFFFF;
this->gicd->igroupr[i] = 0;
}
for (size_t i = 0; i < ITLines; i++) {
this->gicd->ipriorityr.bytes[i] = 0xFF;
this->gicd->itargetsr.bytes[i] = 0x00;
}
for (size_t i = 0; i < ITLines / 16; i++) {
this->gicd->icfgr[i] = 0x00000000;
}
}
void KInterruptController::Initialize(s32 core_id) {
/* Setup pointers to ARM mmio. */
this->gicd = GetPointer<volatile GicDistributor>(KMemoryLayout::GetInterruptDistributorAddress());
this->gicc = GetPointer<volatile GicCpuInterface>(KMemoryLayout::GetInterruptCpuInterfaceAddress());
/* Clear CTLRs. */
this->gicc->ctlr = 0;
if (core_id == 0) {
this->gicd->ctlr = 0;
}
this->gicc->pmr = 0;
this->gicc->bpr = 7;
/* Setup all interrupt lines. */
SetupInterruptLines(core_id);
/* Set CTLRs. */
if (core_id == 0) {
this->gicd->ctlr = 1;
}
this->gicc->ctlr = 1;
/* Set the mask for this core. */
SetGicMask(core_id);
/* Set the priority level. */
SetPriorityLevel(PriorityLevel_Low);
}
void KInterruptController::Finalize(s32 core_id) {
/* Clear CTLRs. */
if (core_id == 0) {
this->gicd->ctlr = 0;
}
this->gicc->ctlr = 0;
/* Set the priority level. */
SetPriorityLevel(PriorityLevel_High);
/* Setup all interrupt lines. */
SetupInterruptLines(core_id);
this->gicd = nullptr;
this->gicc = nullptr;
}
2020-07-24 10:29:12 +00:00
void KInterruptController::SaveCoreLocal(LocalState *state) const {
/* Save isenabler. */
for (size_t i = 0; i < util::size(state->isenabler); ++i) {
constexpr size_t Offset = 0;
state->isenabler[i] = this->gicd->isenabler[i + Offset];
this->gicd->isenabler[i + Offset] = 0xFFFFFFFF;
}
/* Save ipriorityr. */
for (size_t i = 0; i < util::size(state->ipriorityr); ++i) {
constexpr size_t Offset = 0;
state->ipriorityr[i] = this->gicd->ipriorityr.words[i + Offset];
this->gicd->ipriorityr.words[i + Offset] = 0xFFFFFFFF;
}
/* Save itargetsr. */
for (size_t i = 0; i < util::size(state->itargetsr); ++i) {
constexpr size_t Offset = 0;
state->itargetsr[i] = this->gicd->itargetsr.words[i + Offset];
}
/* Save icfgr. */
for (size_t i = 0; i < util::size(state->icfgr); ++i) {
constexpr size_t Offset = 0;
state->icfgr[i] = this->gicd->icfgr[i + Offset];
}
}
void KInterruptController::SaveGlobal(GlobalState *state) const {
/* Save isenabler. */
for (size_t i = 0; i < util::size(state->isenabler); ++i) {
constexpr size_t Offset = util::size(LocalState{}.isenabler);
state->isenabler[i] = this->gicd->isenabler[i + Offset];
this->gicd->isenabler[i + Offset] = 0xFFFFFFFF;
}
/* Save ipriorityr. */
for (size_t i = 0; i < util::size(state->ipriorityr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.ipriorityr);
state->ipriorityr[i] = this->gicd->ipriorityr.words[i + Offset];
this->gicd->ipriorityr.words[i + Offset] = 0xFFFFFFFF;
}
/* Save itargetsr. */
for (size_t i = 0; i < util::size(state->itargetsr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.itargetsr);
state->itargetsr[i] = this->gicd->itargetsr.words[i + Offset];
}
/* Save icfgr. */
for (size_t i = 0; i < util::size(state->icfgr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.icfgr);
state->icfgr[i] = this->gicd->icfgr[i + Offset];
}
}
void KInterruptController::RestoreCoreLocal(const LocalState *state) const {
/* Restore ipriorityr. */
for (size_t i = 0; i < util::size(state->ipriorityr); ++i) {
constexpr size_t Offset = 0;
this->gicd->ipriorityr.words[i + Offset] = state->ipriorityr[i];
}
/* Restore itargetsr. */
for (size_t i = 0; i < util::size(state->itargetsr); ++i) {
constexpr size_t Offset = 0;
this->gicd->itargetsr.words[i + Offset] = state->itargetsr[i];
}
/* Restore icfgr. */
for (size_t i = 0; i < util::size(state->icfgr); ++i) {
constexpr size_t Offset = 0;
this->gicd->icfgr[i + Offset] = state->icfgr[i];
}
/* Restore isenabler. */
for (size_t i = 0; i < util::size(state->isenabler); ++i) {
constexpr size_t Offset = 0;
this->gicd->icenabler[i + Offset] = 0xFFFFFFFF;
this->gicd->isenabler[i + Offset] = state->isenabler[i];
}
}
void KInterruptController::RestoreGlobal(const GlobalState *state) const {
/* Restore ipriorityr. */
for (size_t i = 0; i < util::size(state->ipriorityr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.ipriorityr);
this->gicd->ipriorityr.words[i + Offset] = state->ipriorityr[i];
}
/* Restore itargetsr. */
for (size_t i = 0; i < util::size(state->itargetsr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.itargetsr);
this->gicd->itargetsr.words[i + Offset] = state->itargetsr[i];
}
/* Restore icfgr. */
for (size_t i = 0; i < util::size(state->icfgr); ++i) {
constexpr size_t Offset = util::size(LocalState{}.icfgr);
this->gicd->icfgr[i + Offset] = state->icfgr[i];
}
/* Restore isenabler. */
for (size_t i = 0; i < util::size(state->isenabler); ++i) {
constexpr size_t Offset = util::size(LocalState{}.isenabler);
this->gicd->icenabler[i + Offset] = 0xFFFFFFFF;
this->gicd->isenabler[i + Offset] = state->isenabler[i];
}
}
}