Atmosphere/stratosphere/boot/source/boot_power_utils.cpp
SciresM 3bc2d79384
PRODINFO: Revamp blanking/write disallow policy. (#913)
* exo/fusee: hookup new prodinfo settings

* fusee: new scheme doesn't need FLAGS_DEFAULT

* fusee: fix c/p errors

* ams.mitm: completely revamp prodinfo backup mechanism

* ams.mitm: Implement revamped blanking/write policy

* strat: make early boot more debuggable

* exo: condense flag logic
2020-04-22 16:22:14 -07:00

78 lines
2.7 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 "boot_power_utils.hpp"
#include "fusee-primary_bin.h"
namespace ams::boot {
namespace {
/* Convenience definitions. */
constexpr uintptr_t IramBase = 0x40000000ull;
constexpr uintptr_t IramPayloadBase = 0x40010000ull;
constexpr size_t IramSize = 0x40000;
constexpr size_t IramPayloadMaxSize = 0x2E000;
/* Globals. */
alignas(os::MemoryPageSize) u8 g_work_page[os::MemoryPageSize];
/* Helpers. */
void ClearIram() {
/* Make page FFs. */
std::memset(g_work_page, 0xFF, sizeof(g_work_page));
/* Overwrite all of IRAM with FFs. */
for (size_t ofs = 0; ofs < IramSize; ofs += sizeof(g_work_page)) {
exosphere::CopyToIram(IramBase + ofs, g_work_page, sizeof(g_work_page));
}
}
void DoRebootToPayload(ams::FatalErrorContext *ctx) {
/* Ensure clean IRAM state. */
ClearIram();
/* Copy in payload. */
for (size_t ofs = 0; ofs < fusee_primary_bin_size; ofs += sizeof(g_work_page)) {
std::memcpy(g_work_page, &fusee_primary_bin[ofs], std::min(static_cast<size_t>(fusee_primary_bin_size - ofs), sizeof(g_work_page)));
exosphere::CopyToIram(IramPayloadBase + ofs, g_work_page, sizeof(g_work_page));
}
/* Copy in fatal error context, if relevant. */
if (ctx != nullptr) {
std::memset(g_work_page, 0xCC, sizeof(g_work_page));
std::memcpy(g_work_page, ctx, sizeof(*ctx));
exosphere::CopyToIram(IramPayloadBase + IramPayloadMaxSize, g_work_page, sizeof(g_work_page));
}
exosphere::ForceRebootToIramPayload();
}
}
void RebootSystem() {
DoRebootToPayload(nullptr);
}
void SetInitialRebootPayload() {
::ams::SetInitialRebootPayload(fusee_primary_bin, fusee_primary_bin_size);
}
void RebootForFatalError(ams::FatalErrorContext *ctx) {
DoRebootToPayload(ctx);
}
}