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-rw-r--r--src/core/CMakeLists.txt1
-rw-r--r--src/core/hle/kernel/vm_manager.cpp7
-rw-r--r--src/core/hle/kernel/vm_manager.h5
-rw-r--r--src/core/memory.cpp86
-rw-r--r--src/core/memory_setup.h7
-rw-r--r--src/core/mmio.h34
6 files changed, 127 insertions, 13 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 861b711c7..edf5fcc44 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -250,6 +250,7 @@ set(HEADERS
tracer/citrace.h
memory.h
memory_setup.h
+ mmio.h
settings.h
system.h
)
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp
index 2610acf76..1e289f38a 100644
--- a/src/core/hle/kernel/vm_manager.cpp
+++ b/src/core/hle/kernel/vm_manager.cpp
@@ -8,6 +8,7 @@
#include "core/hle/kernel/vm_manager.h"
#include "core/memory_setup.h"
+#include "core/mmio.h"
namespace Kernel {
@@ -104,7 +105,7 @@ ResultVal<VMManager::VMAHandle> VMManager::MapBackingMemory(VAddr target, u8 * m
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
}
-ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u32 size, MemoryState state) {
+ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u32 size, MemoryState state, Memory::MMIORegionPointer mmio_handler) {
// This is the appropriately sized VMA that will turn into our allocation.
CASCADE_RESULT(VMAIter vma_handle, CarveVMA(target, size));
VirtualMemoryArea& final_vma = vma_handle->second;
@@ -114,6 +115,7 @@ ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u3
final_vma.permissions = VMAPermission::ReadWrite;
final_vma.meminfo_state = state;
final_vma.paddr = paddr;
+ final_vma.mmio_handler = mmio_handler;
UpdatePageTableForVMA(final_vma);
return MakeResult<VMAHandle>(MergeAdjacent(vma_handle));
@@ -330,8 +332,7 @@ void VMManager::UpdatePageTableForVMA(const VirtualMemoryArea& vma) {
Memory::MapMemoryRegion(vma.base, vma.size, vma.backing_memory);
break;
case VMAType::MMIO:
- // TODO(yuriks): Add support for MMIO handlers.
- Memory::MapIoRegion(vma.base, vma.size);
+ Memory::MapIoRegion(vma.base, vma.size, vma.mmio_handler);
break;
}
}
diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h
index 4e95f1f0c..91d40655b 100644
--- a/src/core/hle/kernel/vm_manager.h
+++ b/src/core/hle/kernel/vm_manager.h
@@ -11,6 +11,7 @@
#include "common/common_types.h"
#include "core/hle/result.h"
+#include "core/mmio.h"
namespace Kernel {
@@ -92,6 +93,7 @@ struct VirtualMemoryArea {
// Settings for type = MMIO
/// Physical address of the register area this VMA maps to.
PAddr paddr = 0;
+ Memory::MMIORegionPointer mmio_handler = nullptr;
/// Tests if this area can be merged to the right with `next`.
bool CanBeMergedWith(const VirtualMemoryArea& next) const;
@@ -168,8 +170,9 @@ public:
* @param paddr The physical address where the registers are present.
* @param size Size of the mapping.
* @param state MemoryState tag to attach to the VMA.
+ * @param mmio_handler The handler that will implement read and write for this MMIO region.
*/
- ResultVal<VMAHandle> MapMMIO(VAddr target, PAddr paddr, u32 size, MemoryState state);
+ ResultVal<VMAHandle> MapMMIO(VAddr target, PAddr paddr, u32 size, MemoryState state, Memory::MMIORegionPointer mmio_handler);
/// Unmaps a range of addresses, splitting VMAs as necessary.
ResultCode UnmapRange(VAddr target, u32 size);
diff --git a/src/core/memory.cpp b/src/core/memory.cpp
index fc79c3ee9..4753c63a7 100644
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@@ -13,6 +13,7 @@
#include "core/hle/kernel/process.h"
#include "core/memory.h"
#include "core/memory_setup.h"
+#include "core/mmio.h"
namespace Memory {
@@ -25,6 +26,12 @@ enum class PageType {
Special,
};
+struct SpecialRegion {
+ VAddr base;
+ u32 size;
+ MMIORegionPointer handler;
+};
+
/**
* A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely
* mimics the way a real CPU page table works, but instead is optimized for minimal decoding and
@@ -41,8 +48,13 @@ struct PageTable {
std::array<u8*, NUM_ENTRIES> pointers;
/**
+ * Contains MMIO handlers that back memory regions whose entries in the `attribute` array is of type `Special`.
+ */
+ std::vector<SpecialRegion> special_regions;
+
+ /**
* Array of fine grained page attributes. If it is set to any value other than `Memory`, then
- * the corresponding entry in `pointer` MUST be set to null.
+ * the corresponding entry in `pointers` MUST be set to null.
*/
std::array<PageType, NUM_ENTRIES> attributes;
};
@@ -80,10 +92,12 @@ void MapMemoryRegion(VAddr base, u32 size, u8* target) {
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, target, PageType::Memory);
}
-void MapIoRegion(VAddr base, u32 size) {
+void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler) {
ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: %08X", size);
ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: %08X", base);
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Special);
+
+ current_page_table->special_regions.emplace_back(SpecialRegion{base, size, mmio_handler});
}
void UnmapRegion(VAddr base, u32 size) {
@@ -92,6 +106,22 @@ void UnmapRegion(VAddr base, u32 size) {
MapPages(base / PAGE_SIZE, size / PAGE_SIZE, nullptr, PageType::Unmapped);
}
+/**
+ * This function should only be called for virtual addreses with attribute `PageType::Special`.
+ */
+static MMIORegionPointer GetMMIOHandler(VAddr vaddr) {
+ for (const auto& region : current_page_table->special_regions) {
+ if (vaddr >= region.base && vaddr < (region.base + region.size)) {
+ return region.handler;
+ }
+ }
+ ASSERT_MSG(false, "Mapped IO page without a handler @ %08X", vaddr);
+ return nullptr; // Should never happen
+}
+
+template<typename T>
+T ReadMMIO(MMIORegionPointer mmio_handler, VAddr addr);
+
template <typename T>
T Read(const VAddr vaddr) {
const u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
@@ -108,14 +138,17 @@ T Read(const VAddr vaddr) {
return 0;
case PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ %08X", vaddr);
+ break;
case PageType::Special:
- LOG_ERROR(HW_Memory, "I/O reads aren't implemented yet @ %08X", vaddr);
- return 0;
+ return ReadMMIO<T>(GetMMIOHandler(vaddr), vaddr);
default:
UNREACHABLE();
}
}
+template<typename T>
+void WriteMMIO(MMIORegionPointer mmio_handler, VAddr addr, const T data);
+
template <typename T>
void Write(const VAddr vaddr, const T data) {
u8* page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
@@ -131,9 +164,10 @@ void Write(const VAddr vaddr, const T data) {
return;
case PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ %08X", vaddr);
+ break;
case PageType::Special:
- LOG_ERROR(HW_Memory, "I/O writes aren't implemented yet @ %08X", vaddr);
- return;
+ WriteMMIO<T>(GetMMIOHandler(vaddr), vaddr, data);
+ break;
default:
UNREACHABLE();
}
@@ -191,6 +225,46 @@ void WriteBlock(const VAddr addr, const u8* data, const size_t size) {
}
}
+template<>
+u8 ReadMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr) {
+ return mmio_handler->Read8(addr);
+}
+
+template<>
+u16 ReadMMIO<u16>(MMIORegionPointer mmio_handler, VAddr addr) {
+ return mmio_handler->Read16(addr);
+}
+
+template<>
+u32 ReadMMIO<u32>(MMIORegionPointer mmio_handler, VAddr addr) {
+ return mmio_handler->Read32(addr);
+}
+
+template<>
+u64 ReadMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr) {
+ return mmio_handler->Read64(addr);
+}
+
+template<>
+void WriteMMIO<u8>(MMIORegionPointer mmio_handler, VAddr addr, const u8 data) {
+ mmio_handler->Write8(addr, data);
+}
+
+template<>
+void WriteMMIO<u16>(MMIORegionPointer mmio_handler, VAddr addr, const u16 data) {
+ mmio_handler->Write16(addr, data);
+}
+
+template<>
+void WriteMMIO<u32>(MMIORegionPointer mmio_handler, VAddr addr, const u32 data) {
+ mmio_handler->Write32(addr, data);
+}
+
+template<>
+void WriteMMIO<u64>(MMIORegionPointer mmio_handler, VAddr addr, const u64 data) {
+ mmio_handler->Write64(addr, data);
+}
+
PAddr VirtualToPhysicalAddress(const VAddr addr) {
if (addr == 0) {
return 0;
diff --git a/src/core/memory_setup.h b/src/core/memory_setup.h
index 84ff30120..05f70a1fe 100644
--- a/src/core/memory_setup.h
+++ b/src/core/memory_setup.h
@@ -23,10 +23,11 @@ void MapMemoryRegion(VAddr base, u32 size, u8* target);
/**
* Maps a region of the emulated process address space as a IO region.
- * @note Currently this can only be used to mark a region as being IO, since actual memory-mapped
- * IO isn't yet supported.
+ * @param base The address to start mapping at. Must be page-aligned.
+ * @param size The amount of bytes to map. Must be page-aligned.
+ * @param mmio_handler The handler that backs the mapping.
*/
-void MapIoRegion(VAddr base, u32 size);
+void MapIoRegion(VAddr base, u32 size, MMIORegionPointer mmio_handler);
void UnmapRegion(VAddr base, u32 size);
diff --git a/src/core/mmio.h b/src/core/mmio.h
new file mode 100644
index 000000000..06b555e98
--- /dev/null
+++ b/src/core/mmio.h
@@ -0,0 +1,34 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+
+#include "common/common_types.h"
+
+namespace Memory {
+
+/**
+ * Represents a device with memory mapped IO.
+ * A device may be mapped to multiple regions of memory.
+ */
+class MMIORegion {
+public:
+ virtual ~MMIORegion() = default;
+
+ virtual u8 Read8(VAddr addr) = 0;
+ virtual u16 Read16(VAddr addr) = 0;
+ virtual u32 Read32(VAddr addr) = 0;
+ virtual u64 Read64(VAddr addr) = 0;
+
+ virtual void Write8(VAddr addr, u8 data) = 0;
+ virtual void Write16(VAddr addr, u16 data) = 0;
+ virtual void Write32(VAddr addr, u32 data) = 0;
+ virtual void Write64(VAddr addr, u64 data) = 0;
+};
+
+using MMIORegionPointer = std::shared_ptr<MMIORegion>;
+
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 09:52:11 +0100