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Diffstat (limited to 'src/core/hle/kernel/memory.cpp')
-rw-r--r-- | src/core/hle/kernel/memory.cpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/core/hle/kernel/memory.cpp b/src/core/hle/kernel/memory.cpp new file mode 100644 index 000000000..e4fc5f3c4 --- /dev/null +++ b/src/core/hle/kernel/memory.cpp @@ -0,0 +1,136 @@ +// 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 |