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kern: remove target-firmware logic for kernel loader

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This commit is contained in:
Michael Scire 2020-12-29 12:21:41 -08:00
parent 0c9cb830f7
commit 8bfda27e0e
5 changed files with 153 additions and 98 deletions
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5
libraries/libmesosphere/include/mesosphere/arch/arm64/init/kern_k_init_page_table.hpp
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@ -690,12 +690,7 @@ namespace ams::kern::arch::arm64::init {
}
ALWAYS_INLINE void InitializeFromState(uintptr_t state_val) {
if (kern::GetTargetFirmware() >= ams::TargetFirmware_10_0_0) {
m_state = *reinterpret_cast<State *>(state_val);
} else {
m_state.next_address = state_val;
m_state.free_bitmap = 0;
}
}
ALWAYS_INLINE void GetFinalState(State *out) {

25
mesosphere/kernel_ldr/source/board/nintendo/nx/kern_init_loader_board_setup.cpp Normal file
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@ -0,0 +1,25 @@
/*
* 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>
#include "../../../kern_init_loader_board_setup.hpp"
namespace ams::kern::init::loader {
void PerformBoardSpecificSetup() {
/* ... */
}
}

95
mesosphere/kernel_ldr/source/kern_init_loader.cpp
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@ -14,7 +14,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
#include "kern_init_loader_asm.hpp"
#include "kern_init_loader_board_setup.hpp"
/* Necessary for calculating kernelldr size/base for initial identity mapping */
extern "C" {
@ -71,22 +71,6 @@ namespace ams::kern::init::loader {
cpu::InvalidateEntireTlb();
}
#ifdef ATMOSPHERE_BOARD_NINTENDO_NX
ALWAYS_INLINE bool ShouldPerformCpuSpecificSetup() {
/* Perform cpu-specific setup only on < 10.0.0. */
return kern::GetTargetFirmware() < ams::TargetFirmware_10_0_0;
}
#else
consteval ALWAYS_INLINE bool ShouldPerformCpuSpecificSetup() {
/* Always perform cpu-specific setup. */
return true;
}
#endif
void SetupInitialIdentityMapping(KInitialPageTable &ttbr1_table, uintptr_t base_address, uintptr_t kernel_size, uintptr_t page_table_region, size_t page_table_region_size, KInitialPageTable::IPageAllocator &allocator) {
/* Make a new page table for TTBR0_EL1. */
KInitialPageTable ttbr0_table(allocator.Allocate());
@ -116,72 +100,8 @@ namespace ams::kern::init::loader {
cpu::MemoryAccessIndirectionRegisterAccessor(MairValue).Store();
cpu::TranslationControlRegisterAccessor(TcrValue).Store();
/* Perform cpu-specific setup if needed. */
if (ShouldPerformCpuSpecificSetup()) {
SavedRegisterState saved_registers;
SaveRegistersToTpidrEl1(&saved_registers);
ON_SCOPE_EXIT { VerifyAndClearTpidrEl1(&saved_registers); };
/* Main ID specific setup. */
cpu::MainIdRegisterAccessor midr_el1;
if (midr_el1.GetImplementer() == cpu::MainIdRegisterAccessor::Implementer::ArmLimited) {
/* ARM limited specific setup. */
const auto cpu_primary_part = midr_el1.GetPrimaryPartNumber();
const auto cpu_variant = midr_el1.GetVariant();
const auto cpu_revision = midr_el1.GetRevision();
if (cpu_primary_part == cpu::MainIdRegisterAccessor::PrimaryPartNumber::CortexA57) {
/* Cortex-A57 specific setup. */
/* Non-cacheable load forwarding enabled. */
u64 cpuactlr_value = 0x1000000;
/* Enable the processor to receive instruction cache and TLB maintenance */
/* operations broadcast from other processors in the cluster; */
/* set the L2 load/store data prefetch distance to 8 requests; */
/* set the L2 instruction fetch prefetch distance to 3 requests. */
u64 cpuectlr_value = 0x1B00000040;
/* Disable load-pass DMB on certain hardware variants. */
if (cpu_variant == 0 || (cpu_variant == 1 && cpu_revision <= 1)) {
cpuactlr_value |= 0x800000000000000;
}
/* Set actlr and ectlr. */
if (cpu::GetCpuActlrEl1() != cpuactlr_value) {
cpu::SetCpuActlrEl1(cpuactlr_value);
}
if (cpu::GetCpuEctlrEl1() != cpuectlr_value) {
cpu::SetCpuEctlrEl1(cpuectlr_value);
}
} else if (cpu_primary_part == cpu::MainIdRegisterAccessor::PrimaryPartNumber::CortexA53) {
/* Cortex-A53 specific setup. */
/* Set L1 data prefetch control to allow 5 outstanding prefetches; */
/* enable device split throttle; */
/* set the number of independent data prefetch streams to 2; */
/* disable transient and no-read-allocate hints for loads; */
/* set write streaming no-allocate threshold so the 128th consecutive streaming */
/* cache line does not allocate in the L1 or L2 cache. */
u64 cpuactlr_value = 0x90CA000;
/* Enable hardware management of data coherency with other cores in the cluster. */
u64 cpuectlr_value = 0x40;
/* If supported, enable data cache clean as data cache clean/invalidate. */
if (cpu_variant != 0 || (cpu_variant == 0 && cpu_revision > 2)) {
cpuactlr_value |= 0x100000000000;
}
/* Set actlr and ectlr. */
if (cpu::GetCpuActlrEl1() != cpuactlr_value) {
cpu::SetCpuActlrEl1(cpuactlr_value);
}
if (cpu::GetCpuEctlrEl1() != cpuectlr_value) {
cpu::SetCpuEctlrEl1(cpuectlr_value);
}
}
}
}
/* Perform board-specific setup. */
PerformBoardSpecificSetup();
/* Ensure that the entire cache is flushed. */
EnsureEntireDataCacheFlushed();
@ -300,10 +220,9 @@ namespace ams::kern::init::loader {
ttbr1_table.Map(virtual_base_address + ro_offset, ro_end_offset - ro_offset, base_address + ro_offset, KernelRwDataAttribute, g_initial_page_allocator);
ttbr1_table.Map(virtual_base_address + rw_offset, bss_end_offset - rw_offset, base_address + rw_offset, KernelRwDataAttribute, g_initial_page_allocator);
/* On 10.0.0+, Physically randomize the kernel region. */
if (kern::GetTargetFirmware() >= ams::TargetFirmware_10_0_0) {
/* Physically randomize the kernel region. */
/* NOTE: Nintendo does this only on 10.0.0+ */
ttbr1_table.PhysicallyRandomize(virtual_base_address + rx_offset, bss_end_offset - rx_offset, true);
}
/* Clear kernel .bss. */
std::memset(GetVoidPointer(virtual_base_address + bss_offset), 0, bss_end_offset - bss_offset);
@ -330,11 +249,7 @@ namespace ams::kern::init::loader {
uintptr_t GetFinalPageAllocatorState() {
g_initial_page_allocator.GetFinalState(std::addressof(g_final_page_allocator_state));
if (kern::GetTargetFirmware() >= ams::TargetFirmware_10_0_0) {
return reinterpret_cast<uintptr_t>(std::addressof(g_final_page_allocator_state));
} else {
return g_final_page_allocator_state.next_address;
}
}
}

93
mesosphere/kernel_ldr/source/kern_init_loader_board_default_setup.arch.arm64.cpp Normal file
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@ -0,0 +1,93 @@
/*
* 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>
#include "kern_init_loader_asm.hpp"
#include "kern_init_loader_board_setup.hpp"
namespace ams::kern::init::loader {
void PerformDefaultAarch64SpecificSetup() {
SavedRegisterState saved_registers;
SaveRegistersToTpidrEl1(std::addressof(saved_registers));
ON_SCOPE_EXIT { VerifyAndClearTpidrEl1(std::addressof(saved_registers)); };
/* Main ID specific setup. */
cpu::MainIdRegisterAccessor midr_el1;
if (midr_el1.GetImplementer() == cpu::MainIdRegisterAccessor::Implementer::ArmLimited) {
/* ARM limited specific setup. */
const auto cpu_primary_part = midr_el1.GetPrimaryPartNumber();
const auto cpu_variant = midr_el1.GetVariant();
const auto cpu_revision = midr_el1.GetRevision();
if (cpu_primary_part == cpu::MainIdRegisterAccessor::PrimaryPartNumber::CortexA57) {
/* Cortex-A57 specific setup. */
/* Non-cacheable load forwarding enabled. */
u64 cpuactlr_value = 0x1000000;
/* Enable the processor to receive instruction cache and TLB maintenance */
/* operations broadcast from other processors in the cluster; */
/* set the L2 load/store data prefetch distance to 8 requests; */
/* set the L2 instruction fetch prefetch distance to 3 requests. */
u64 cpuectlr_value = 0x1B00000040;
/* Disable load-pass DMB on certain hardware variants. */
if (cpu_variant == 0 || (cpu_variant == 1 && cpu_revision <= 1)) {
cpuactlr_value |= 0x800000000000000;
}
/* Set actlr and ectlr. */
if (cpu::GetCpuActlrEl1() != cpuactlr_value) {
cpu::SetCpuActlrEl1(cpuactlr_value);
}
if (cpu::GetCpuEctlrEl1() != cpuectlr_value) {
cpu::SetCpuEctlrEl1(cpuectlr_value);
}
} else if (cpu_primary_part == cpu::MainIdRegisterAccessor::PrimaryPartNumber::CortexA53) {
/* Cortex-A53 specific setup. */
/* Set L1 data prefetch control to allow 5 outstanding prefetches; */
/* enable device split throttle; */
/* set the number of independent data prefetch streams to 2; */
/* disable transient and no-read-allocate hints for loads; */
/* set write streaming no-allocate threshold so the 128th consecutive streaming */
/* cache line does not allocate in the L1 or L2 cache. */
u64 cpuactlr_value = 0x90CA000;
/* Enable hardware management of data coherency with other cores in the cluster. */
u64 cpuectlr_value = 0x40;
/* If supported, enable data cache clean as data cache clean/invalidate. */
if (cpu_variant != 0 || (cpu_variant == 0 && cpu_revision > 2)) {
cpuactlr_value |= 0x100000000000;
}
/* Set actlr and ectlr. */
if (cpu::GetCpuActlrEl1() != cpuactlr_value) {
cpu::SetCpuActlrEl1(cpuactlr_value);
}
if (cpu::GetCpuEctlrEl1() != cpuectlr_value) {
cpu::SetCpuEctlrEl1(cpuectlr_value);
}
}
}
}
/* This is a default implementation, which should be overridden in a source file in board/ */
WEAK_SYMBOL void PerformBoardSpecificSetup() {
return PerformDefaultAarch64SpecificSetup();
}
}

27
mesosphere/kernel_ldr/source/kern_init_loader_board_setup.hpp Normal file
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@ -0,0 +1,27 @@
/*
* 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/>.
*/
#pragma once
#include <mesosphere.hpp>
namespace ams::kern::init::loader {
#if defined(ATMOSPHERE_ARCH_ARM64)
void PerformDefaultAarch64SpecificSetup();
#endif
void PerformBoardSpecificSetup();
}