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Kernel: Map special regions according to ExHeader

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This replaces the hardcoded VRAM/DSP mappings with ones made based on
the ExHeader ARM11 Kernel caps list. While this has no visible effect
for most applications (since they use a standard set of mappings) it
does improve support for system modules and n3DS exclusives.
This commit is contained in:
Yuri Kunde Schlesner 2017-05-05 23:11:06 -07:00
parent b4a93cfdde
commit f18d454eb6
5 changed files with 105 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

117
src/core/hle/kernel/memory.cpp
View file

@ -2,11 +2,13 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cinttypes>
#include <map>
#include <memory>
#include <utility>
#include <vector>
#include "audio_core/audio_core.h"
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "core/hle/config_mem.h"
@ -92,57 +94,96 @@ MemoryRegionInfo* GetMemoryRegion(MemoryRegion region) {
UNREACHABLE();
}
}
}
namespace Memory {
std::array<u8, Memory::VRAM_SIZE> vram;
std::array<u8, Memory::N3DS_EXTRA_RAM_SIZE> n3ds_extra_ram;
namespace {
void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping) {
using namespace Memory;
struct MemoryArea {
u32 base;
u32 size;
const char* name;
};
struct MemoryArea {
VAddr vaddr_base;
PAddr paddr_base;
u32 size;
};
// We don't declare the IO regions in here since its handled by other means.
static MemoryArea memory_areas[] = {
{VRAM_VADDR, VRAM_SIZE, "VRAM"}, // Video memory (VRAM)
};
}
// The order of entries in this array is important. The VRAM and IO VAddr ranges overlap, and
// VRAM must be tried first.
static constexpr MemoryArea memory_areas[] = {
{VRAM_VADDR, VRAM_PADDR, VRAM_SIZE},
{IO_AREA_VADDR, IO_AREA_PADDR, IO_AREA_SIZE},
{DSP_RAM_VADDR, DSP_RAM_PADDR, DSP_RAM_SIZE},
{N3DS_EXTRA_RAM_VADDR, N3DS_EXTRA_RAM_PADDR, N3DS_EXTRA_RAM_SIZE - 0x20000},
};
void Init() {
InitMemoryMap();
LOG_DEBUG(HW_Memory, "initialized OK");
}
void InitLegacyAddressSpace(Kernel::VMManager& address_space) {
using namespace Kernel;
for (MemoryArea& area : memory_areas) {
auto block = std::make_shared<std::vector<u8>>(area.size);
address_space
.MapMemoryBlock(area.base, std::move(block), 0, area.size, MemoryState::Private)
.Unwrap();
VAddr mapping_limit = mapping.address + mapping.size;
if (mapping_limit < mapping.address) {
LOG_CRITICAL(Loader, "Mapping size overflowed: address=0x%08" PRIX32 " size=0x%" PRIX32,
mapping.address, mapping.size);
return;
}
auto area =
std::find_if(std::begin(memory_areas), std::end(memory_areas), [&](const auto& area) {
return mapping.address >= area.vaddr_base &&
mapping_limit <= area.vaddr_base + area.size;
});
if (area == std::end(memory_areas)) {
LOG_ERROR(Loader, "Unhandled special mapping: address=0x%08" PRIX32 " size=0x%" PRIX32
" read_only=%d unk_flag=%d",
mapping.address, mapping.size, mapping.read_only, mapping.unk_flag);
return;
}
u32 offset_into_region = mapping.address - area->vaddr_base;
if (area->paddr_base == IO_AREA_PADDR) {
LOG_ERROR(Loader, "MMIO mappings are not supported yet. phys_addr=0x%08" PRIX32,
area->paddr_base + offset_into_region);
return;
}
// TODO(yuriks): Use GetPhysicalPointer when that becomes independent of the virtual
// mappings.
u8* target_pointer = nullptr;
switch (area->paddr_base) {
case VRAM_PADDR:
target_pointer = vram.data();
break;
case DSP_RAM_PADDR:
target_pointer = AudioCore::GetDspMemory().data();
break;
case N3DS_EXTRA_RAM_PADDR:
target_pointer = n3ds_extra_ram.data();
break;
default:
UNREACHABLE();
}
// TODO(yuriks): This flag seems to have some other effect, but it's unknown what
MemoryState memory_state = mapping.unk_flag ? MemoryState::Static : MemoryState::IO;
auto vma = address_space
.MapBackingMemory(mapping.address, target_pointer + offset_into_region,
mapping.size, memory_state)
.MoveFrom();
address_space.Reprotect(vma,
mapping.read_only ? VMAPermission::Read : VMAPermission::ReadWrite);
}
void MapSharedPages(VMManager& address_space) {
auto cfg_mem_vma = address_space
.MapBackingMemory(CONFIG_MEMORY_VADDR, (u8*)&ConfigMem::config_mem,
CONFIG_MEMORY_SIZE, MemoryState::Shared)
.MapBackingMemory(Memory::CONFIG_MEMORY_VADDR,
reinterpret_cast<u8*>(&ConfigMem::config_mem),
Memory::CONFIG_MEMORY_SIZE, MemoryState::Shared)
.MoveFrom();
address_space.Reprotect(cfg_mem_vma, VMAPermission::Read);
auto shared_page_vma = address_space
.MapBackingMemory(SHARED_PAGE_VADDR, (u8*)&SharedPage::shared_page,
SHARED_PAGE_SIZE, MemoryState::Shared)
.MapBackingMemory(Memory::SHARED_PAGE_VADDR,
reinterpret_cast<u8*>(&SharedPage::shared_page),
Memory::SHARED_PAGE_SIZE, MemoryState::Shared)
.MoveFrom();
address_space.Reprotect(shared_page_vma, VMAPermission::Read);
auto& dsp_ram = AudioCore::GetDspMemory();
auto dsp_vma = address_space
.MapBackingMemory(DSP_RAM_VADDR, dsp_ram.data(), dsp_ram.size(),
Kernel::MemoryState::IO)
.MoveFrom();
address_space.Reprotect(dsp_vma, Kernel::VMAPermission::ReadWrite);
}
} // namespace
} // namespace Kernel

10
src/core/hle/kernel/memory.h
View file

@ -23,11 +23,7 @@ struct MemoryRegionInfo {
void MemoryInit(u32 mem_type);
void MemoryShutdown();
MemoryRegionInfo* GetMemoryRegion(MemoryRegion region);
}
namespace Memory {
void Init();
void InitLegacyAddressSpace(Kernel::VMManager& address_space);
} // namespace
void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping);
void MapSharedPages(VMManager& address_space);
} // namespace Kernel

23
src/core/hle/kernel/process.cpp
View file

@ -35,7 +35,6 @@ SharedPtr<Process> Process::Create(SharedPtr<CodeSet> code_set) {
process->codeset = std::move(code_set);
process->flags.raw = 0;
process->flags.memory_region.Assign(MemoryRegion::APPLICATION);
Memory::InitLegacyAddressSpace(process->vm_manager);
return process;
}
@ -78,8 +77,15 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
AddressMapping mapping;
mapping.address = descriptor << 12;
mapping.size = (end_desc << 12) - mapping.address;
mapping.writable = (descriptor & (1 << 20)) != 0;
VAddr end_address = end_desc << 12;
if (mapping.address < end_address) {
mapping.size = end_address - mapping.address;
} else {
mapping.size = 0;
}
mapping.read_only = (descriptor & (1 << 20)) != 0;
mapping.unk_flag = (end_desc & (1 << 20)) != 0;
address_mappings.push_back(mapping);
@ -88,8 +94,10 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
AddressMapping mapping;
mapping.address = descriptor << 12;
mapping.size = Memory::PAGE_SIZE;
mapping.writable = true; // TODO: Not sure if correct
mapping.read_only = false;
mapping.unk_flag = false;
address_mappings.push_back(mapping);
} else if ((type & 0xFE0) == 0xFC0) { // 0x01FF
// Kernel version
kernel_version = descriptor & 0xFFFF;
@ -131,6 +139,12 @@ void Process::Run(s32 main_thread_priority, u32 stack_size) {
misc_memory_used += stack_size;
memory_region->used += stack_size;
// Map special address mappings
MapSharedPages(vm_manager);
for (const auto& mapping : address_mappings) {
HandleSpecialMapping(vm_manager, mapping);
}
vm_manager.LogLayout(Log::Level::Debug);
Kernel::SetupMainThread(codeset->entrypoint, main_thread_priority);
}
@ -138,6 +152,7 @@ void Process::Run(s32 main_thread_priority, u32 stack_size) {
VAddr Process::GetLinearHeapAreaAddress() const {
return kernel_version < 0x22C ? Memory::LINEAR_HEAP_VADDR : Memory::NEW_LINEAR_HEAP_VADDR;
}
VAddr Process::GetLinearHeapBase() const {
return GetLinearHeapAreaAddress() + memory_region->base;
}

2
src/core/hle/kernel/process.h
View file

@ -20,7 +20,7 @@ struct AddressMapping {
// Address and size must be page-aligned
VAddr address;
u32 size;
bool writable;
bool read_only;
bool unk_flag;
};