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Kernel/Memory: Changed GetPhysicalPointer so that it doesn't go through the current process' page table to obtain a pointer.

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This commit is contained in:
Subv 2017-07-21 22:22:59 -05:00
parent 23ad87098d
commit 71281c2114
4 changed files with 69 additions and 30 deletions
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65
src/core/memory.cpp
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@ -4,10 +4,12 @@
#include <array>
#include <cstring>
#include "audio_core/audio_core.h"
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/hle/kernel/memory.h"
#include "core/hle/kernel/process.h"
#include "core/memory.h"
#include "core/memory_setup.h"
@ -16,6 +18,9 @@
namespace Memory {
static std::array<u8, Memory::VRAM_SIZE> vram;
static std::array<u8, Memory::N3DS_EXTRA_RAM_SIZE> n3ds_extra_ram;
PageTable* current_page_table = nullptr;
std::array<u8*, PAGE_TABLE_NUM_ENTRIES>* GetCurrentPageTablePointers() {
@ -236,9 +241,63 @@ std::string ReadCString(VAddr vaddr, std::size_t max_length) {
}
u8* GetPhysicalPointer(PAddr address) {
// TODO(Subv): This call should not go through the application's memory mapping.
boost::optional<VAddr> vaddr = PhysicalToVirtualAddress(address);
return vaddr ? GetPointer(*vaddr) : nullptr;
struct MemoryArea {
PAddr paddr_base;
u32 size;
};
static constexpr MemoryArea memory_areas[] = {
{VRAM_PADDR, VRAM_SIZE},
{IO_AREA_PADDR, IO_AREA_SIZE},
{DSP_RAM_PADDR, DSP_RAM_SIZE},
{FCRAM_PADDR, FCRAM_N3DS_SIZE},
{N3DS_EXTRA_RAM_PADDR, N3DS_EXTRA_RAM_SIZE},
};
const auto area =
std::find_if(std::begin(memory_areas), std::end(memory_areas), [&](const auto& area) {
return address >= area.paddr_base && address < area.paddr_base + area.size;
});
if (area == std::end(memory_areas)) {
LOG_ERROR(HW_Memory, "unknown GetPhysicalPointer @ 0x%08X", address);
return nullptr;
}
if (area->paddr_base == IO_AREA_PADDR) {
LOG_ERROR(HW_Memory, "MMIO mappings are not supported yet. phys_addr=0x%08X", address);
return nullptr;
}
u32 offset_into_region = address - area->paddr_base;
u8* target_pointer = nullptr;
switch (area->paddr_base) {
case VRAM_PADDR:
target_pointer = vram.data() + offset_into_region;
break;
case DSP_RAM_PADDR:
target_pointer = AudioCore::GetDspMemory().data() + offset_into_region;
break;
case FCRAM_PADDR:
for (const auto& region : Kernel::memory_regions) {
if (offset_into_region >= region.base &&
offset_into_region < region.base + region.size) {
target_pointer =
region.linear_heap_memory->data() + offset_into_region - region.base;
break;
}
}
ASSERT_MSG(target_pointer != nullptr, "Invalid FCRAM address");
break;
case N3DS_EXTRA_RAM_PADDR:
target_pointer = n3ds_extra_ram.data() + offset_into_region;
break;
default:
UNREACHABLE();
}
return target_pointer;
}
void RasterizerMarkRegionCached(PAddr start, u32 size, int count_delta) {