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Merge pull request #1726 from MerryMage/read-write-region
AudioCore: CurrentRegion() -> ReadRegion(), WriteRegion()
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commit
73624b4721
@ -38,10 +38,10 @@ void Init() {
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/// Add DSP address spaces to Process's address space.
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void AddAddressSpace(Kernel::VMManager& address_space) {
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auto r0_vma = address_space.MapBackingMemory(DSP::HLE::region0_base, reinterpret_cast<u8*>(&DSP::HLE::g_region0), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
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auto r0_vma = address_space.MapBackingMemory(DSP::HLE::region0_base, reinterpret_cast<u8*>(&DSP::HLE::g_regions[0]), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
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address_space.Reprotect(r0_vma, Kernel::VMAPermission::ReadWrite);
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auto r1_vma = address_space.MapBackingMemory(DSP::HLE::region1_base, reinterpret_cast<u8*>(&DSP::HLE::g_region1), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
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auto r1_vma = address_space.MapBackingMemory(DSP::HLE::region1_base, reinterpret_cast<u8*>(&DSP::HLE::g_regions[1]), sizeof(DSP::HLE::SharedMemory), Kernel::MemoryState::IO).MoveFrom();
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address_space.Reprotect(r1_vma, Kernel::VMAPermission::ReadWrite);
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}
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@ -8,8 +8,32 @@
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namespace DSP {
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namespace HLE {
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SharedMemory g_region0;
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SharedMemory g_region1;
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std::array<SharedMemory, 2> g_regions;
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static size_t CurrentRegionIndex() {
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// The region with the higher frame counter is chosen unless there is wraparound.
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// This function only returns a 0 or 1.
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if (g_regions[0].frame_counter == 0xFFFFu && g_regions[1].frame_counter != 0xFFFEu) {
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// Wraparound has occured.
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return 1;
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}
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if (g_regions[1].frame_counter == 0xFFFFu && g_regions[0].frame_counter != 0xFFFEu) {
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// Wraparound has occured.
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return 0;
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}
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return (g_regions[0].frame_counter > g_regions[1].frame_counter) ? 0 : 1;
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}
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static SharedMemory& ReadRegion() {
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return g_regions[CurrentRegionIndex()];
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}
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static SharedMemory& WriteRegion() {
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return g_regions[1 - CurrentRegionIndex()];
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}
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void Init() {
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DSP::HLE::ResetPipes();
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@ -22,21 +46,5 @@ bool Tick() {
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return true;
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}
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SharedMemory& CurrentRegion() {
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// The region with the higher frame counter is chosen unless there is wraparound.
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if (g_region0.frame_counter == 0xFFFFu && g_region1.frame_counter != 0xFFFEu) {
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// Wraparound has occured.
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return g_region1;
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}
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if (g_region1.frame_counter == 0xFFFFu && g_region0.frame_counter != 0xFFFEu) {
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// Wraparound has occured.
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return g_region0;
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}
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return (g_region0.frame_counter > g_region1.frame_counter) ? g_region0 : g_region1;
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}
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} // namespace HLE
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} // namespace DSP
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@ -4,6 +4,7 @@
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#pragma once
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#include <array>
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#include <cstddef>
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#include <type_traits>
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@ -30,10 +31,9 @@ namespace HLE {
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struct SharedMemory;
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constexpr VAddr region0_base = 0x1FF50000;
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extern SharedMemory g_region0;
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constexpr VAddr region1_base = 0x1FF70000;
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extern SharedMemory g_region1;
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extern std::array<SharedMemory, 2> g_regions;
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/**
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* The DSP is native 16-bit. The DSP also appears to be big-endian. When reading 32-bit numbers from
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@ -535,8 +535,5 @@ void Shutdown();
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*/
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bool Tick();
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/// Returns a mutable reference to the current region. Current region is selected based on the frame counter.
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SharedMemory& CurrentRegion();
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} // namespace HLE
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} // namespace DSP
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