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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <map>
#include <memory>
#include <utility>
#include <vector>
#include "common/common_types.h"
#include "common/logging/log.h"
#include "core/hle/config_mem.h"
#include "core/hle/kernel/memory.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/hle/result.h"
#include "core/hle/shared_page.h"
#include "core/memory.h"
#include "core/memory_setup.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Kernel {
static MemoryRegionInfo memory_regions[3];
/// Size of the APPLICATION, SYSTEM and BASE memory regions (respectively) for each sytem
/// memory configuration type.
static const u32 memory_region_sizes[8][3] = {
// Old 3DS layouts
{0x04000000, 0x02C00000, 0x01400000}, // 0
{ /* This appears to be unused. */ }, // 1
{0x06000000, 0x00C00000, 0x01400000}, // 2
{0x05000000, 0x01C00000, 0x01400000}, // 3
{0x04800000, 0x02400000, 0x01400000}, // 4
{0x02000000, 0x04C00000, 0x01400000}, // 5
// New 3DS layouts
{0x07C00000, 0x06400000, 0x02000000}, // 6
{0x0B200000, 0x02E00000, 0x02000000}, // 7
};
void MemoryInit(u32 mem_type) {
// TODO(yuriks): On the n3DS, all o3DS configurations (<=5) are forced to 6 instead.
ASSERT_MSG(mem_type <= 5, "New 3DS memory configuration aren't supported yet!");
ASSERT(mem_type != 1);
// The kernel allocation regions (APPLICATION, SYSTEM and BASE) are laid out in sequence, with
// the sizes specified in the memory_region_sizes table.
VAddr base = 0;
for (int i = 0; i < 3; ++i) {
memory_regions[i].base = base;
memory_regions[i].size = memory_region_sizes[mem_type][i];
memory_regions[i].linear_heap_memory = std::make_shared<std::vector<u8>>();
base += memory_regions[i].size;
}
// We must've allocated the entire FCRAM by the end
ASSERT(base == Memory::FCRAM_SIZE);
using ConfigMem::config_mem;
config_mem.app_mem_type = mem_type;
// app_mem_malloc does not always match the configured size for memory_region[0]: in case the
// n3DS type override is in effect it reports the size the game expects, not the real one.
config_mem.app_mem_alloc = memory_region_sizes[mem_type][0];
config_mem.sys_mem_alloc = memory_regions[1].size;
config_mem.base_mem_alloc = memory_regions[2].size;
}
void MemoryShutdown() {
for (auto& region : memory_regions) {
region.base = 0;
region.size = 0;
region.linear_heap_memory = nullptr;
}
}
MemoryRegionInfo* GetMemoryRegion(MemoryRegion region) {
switch (region) {
case MemoryRegion::APPLICATION:
return &memory_regions[0];
case MemoryRegion::SYSTEM:
return &memory_regions[1];
case MemoryRegion::BASE:
return &memory_regions[2];
default:
UNREACHABLE();
}
}
}
namespace Memory {
namespace {
struct MemoryArea {
u32 base;
u32 size;
const char* name;
};
// We don't declare the IO regions in here since its handled by other means.
static MemoryArea memory_areas[] = {
{SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE, "Shared Memory"}, // Shared memory
{VRAM_VADDR, VRAM_SIZE, "VRAM"}, // Video memory (VRAM)
{DSP_RAM_VADDR, DSP_RAM_SIZE, "DSP RAM"}, // DSP memory
{TLS_AREA_VADDR, TLS_AREA_SIZE, "TLS Area"}, // TLS memory
};
}
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();
}
auto cfg_mem_vma = address_space.MapBackingMemory(CONFIG_MEMORY_VADDR,
(u8*)&ConfigMem::config_mem, 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).MoveFrom();
address_space.Reprotect(shared_page_vma, VMAPermission::Read);
}
} // namespace
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