diff options
Diffstat (limited to 'src/core')
| -rw-r--r-- | src/core/memory.cpp | 130 | ||||
| -rw-r--r-- | src/core/memory.h | 15 |
2 files changed, 77 insertions, 68 deletions
diff --git a/src/core/memory.cpp b/src/core/memory.cpp index fb824d710..8c3489ed3 100644 --- a/src/core/memory.cpp +++ b/src/core/memory.cpp @@ -225,6 +225,69 @@ struct Memory::Impl { return string; } + void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) { + if (vaddr == 0) { + return; + } + + // Iterate over a contiguous CPU address space, which corresponds to the specified GPU + // address space, marking the region as un/cached. The region is marked un/cached at a + // granularity of CPU pages, hence why we iterate on a CPU page basis (note: GPU page size + // is different). This assumes the specified GPU address region is contiguous as well. + + u64 num_pages = ((vaddr + size - 1) >> PAGE_BITS) - (vaddr >> PAGE_BITS) + 1; + for (unsigned i = 0; i < num_pages; ++i, vaddr += PAGE_SIZE) { + Common::PageType& page_type = current_page_table->attributes[vaddr >> PAGE_BITS]; + + if (cached) { + // Switch page type to cached if now cached + switch (page_type) { + case Common::PageType::Unmapped: + // It is not necessary for a process to have this region mapped into its address + // space, for example, a system module need not have a VRAM mapping. + break; + case Common::PageType::Memory: + page_type = Common::PageType::RasterizerCachedMemory; + current_page_table->pointers[vaddr >> PAGE_BITS] = nullptr; + break; + case Common::PageType::RasterizerCachedMemory: + // There can be more than one GPU region mapped per CPU region, so it's common + // that this area is already marked as cached. + break; + default: + UNREACHABLE(); + } + } else { + // Switch page type to uncached if now uncached + switch (page_type) { + case Common::PageType::Unmapped: + // It is not necessary for a process to have this region mapped into its address + // space, for example, a system module need not have a VRAM mapping. + break; + case Common::PageType::Memory: + // There can be more than one GPU region mapped per CPU region, so it's common + // that this area is already unmarked as cached. + break; + case Common::PageType::RasterizerCachedMemory: { + u8* pointer = GetPointerFromVMA(vaddr & ~PAGE_MASK); + if (pointer == nullptr) { + // It's possible that this function has been called while updating the + // pagetable after unmapping a VMA. In that case the underlying VMA will no + // longer exist, and we should just leave the pagetable entry blank. + page_type = Common::PageType::Unmapped; + } else { + page_type = Common::PageType::Memory; + current_page_table->pointers[vaddr >> PAGE_BITS] = pointer; + } + break; + } + default: + UNREACHABLE(); + } + } + } + } + /** * Maps a region of pages as a specific type. * @@ -318,6 +381,10 @@ std::string Memory::ReadCString(VAddr vaddr, std::size_t max_length) { return impl->ReadCString(vaddr, max_length); } +void Memory::RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) { + impl->RasterizerMarkRegionCached(vaddr, size, cached); +} + void SetCurrentPageTable(Kernel::Process& process) { current_page_table = &process.VMManager().page_table; @@ -334,69 +401,6 @@ bool IsKernelVirtualAddress(const VAddr vaddr) { return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END; } -void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached) { - if (vaddr == 0) { - return; - } - - // Iterate over a contiguous CPU address space, which corresponds to the specified GPU address - // space, marking the region as un/cached. The region is marked un/cached at a granularity of - // CPU pages, hence why we iterate on a CPU page basis (note: GPU page size is different). This - // assumes the specified GPU address region is contiguous as well. - - u64 num_pages = ((vaddr + size - 1) >> PAGE_BITS) - (vaddr >> PAGE_BITS) + 1; - for (unsigned i = 0; i < num_pages; ++i, vaddr += PAGE_SIZE) { - Common::PageType& page_type = current_page_table->attributes[vaddr >> PAGE_BITS]; - - if (cached) { - // Switch page type to cached if now cached - switch (page_type) { - case Common::PageType::Unmapped: - // It is not necessary for a process to have this region mapped into its address - // space, for example, a system module need not have a VRAM mapping. - break; - case Common::PageType::Memory: - page_type = Common::PageType::RasterizerCachedMemory; - current_page_table->pointers[vaddr >> PAGE_BITS] = nullptr; - break; - case Common::PageType::RasterizerCachedMemory: - // There can be more than one GPU region mapped per CPU region, so it's common that - // this area is already marked as cached. - break; - default: - UNREACHABLE(); - } - } else { - // Switch page type to uncached if now uncached - switch (page_type) { - case Common::PageType::Unmapped: - // It is not necessary for a process to have this region mapped into its address - // space, for example, a system module need not have a VRAM mapping. - break; - case Common::PageType::Memory: - // There can be more than one GPU region mapped per CPU region, so it's common that - // this area is already unmarked as cached. - break; - case Common::PageType::RasterizerCachedMemory: { - u8* pointer = GetPointerFromVMA(vaddr & ~PAGE_MASK); - if (pointer == nullptr) { - // It's possible that this function has been called while updating the pagetable - // after unmapping a VMA. In that case the underlying VMA will no longer exist, - // and we should just leave the pagetable entry blank. - page_type = Common::PageType::Unmapped; - } else { - page_type = Common::PageType::Memory; - current_page_table->pointers[vaddr >> PAGE_BITS] = pointer; - } - break; - } - default: - UNREACHABLE(); - } - } - } -} - u8 Read8(const VAddr addr) { return Read<u8>(addr); } diff --git a/src/core/memory.h b/src/core/memory.h index 47765c8a0..7cd348b49 100644 --- a/src/core/memory.h +++ b/src/core/memory.h @@ -169,6 +169,16 @@ public: */ std::string ReadCString(VAddr vaddr, std::size_t max_length); + /** + * Marks each page within the specified address range as cached or uncached. + * + * @param vaddr The virtual address indicating the start of the address range. + * @param size The size of the address range in bytes. + * @param cached Whether or not any pages within the address range should be + * marked as cached or uncached. + */ + void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached); + private: struct Impl; std::unique_ptr<Impl> impl; @@ -199,9 +209,4 @@ void WriteBlock(VAddr dest_addr, const void* src_buffer, std::size_t size); void ZeroBlock(const Kernel::Process& process, VAddr dest_addr, std::size_t size); void CopyBlock(VAddr dest_addr, VAddr src_addr, std::size_t size); -/** - * Mark each page touching the region as cached. - */ -void RasterizerMarkRegionCached(VAddr vaddr, u64 size, bool cached); - } // namespace Memory |