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[Memory] Add DSP RAM

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wheremyfoodat 2022-10-10 22:55:55 +03:00
parent c34011326e
commit f858107dd0
2 changed files with 26 additions and 1 deletions
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14
include/memory.hpp
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@ -34,7 +34,9 @@ namespace VirtualAddrs {
// Start of TLS for first thread. Next thread's storage will be at TLSBase + 0x1000, and so on
TLSBase = 0xFF400000,
TLSSize = 0x1000
TLSSize = 0x1000,
DSPMemStart = 0x1FF00000
};
}
@ -86,6 +88,8 @@ namespace KernelMemoryTypes {
class Memory {
u8* fcram;
u8* dspRam;
u64& cpuTicks; // Reference to the CPU tick counter
using SharedMemoryBlock = KernelMemoryTypes::SharedMemoryBlock;
@ -110,6 +114,10 @@ class Memory {
static constexpr u32 FCRAM_PAGE_COUNT = FCRAM_SIZE / pageSize;
static constexpr u32 FCRAM_APPLICATION_PAGE_COUNT = FCRAM_APPLICATION_SIZE / pageSize;
static constexpr u32 DSP_RAM_SIZE = 512_KB;
static constexpr u32 DSP_CODE_MEMORY_OFFSET = 0_KB;
static constexpr u32 DSP_DATA_MEMORY_OFFSET = 256_KB;
std::bitset<FCRAM_PAGE_COUNT> usedFCRAMPages;
std::optional<u32> findPaddr(u32 size);
u64 timeSince3DSEpoch();
@ -178,4 +186,8 @@ public:
std::optional<NCCH> loadedCXI = std::nullopt;
// File handle for reading the loaded ncch
IOFile CXIFile;
u8* getDSPMem() { return dspRam; }
u8* getDSPDataMem() { return &dspRam[DSP_DATA_MEMORY_OFFSET]; }
u8* getDSPCodeMem() { return &dspRam[DSP_CODE_MEMORY_OFFSET]; }
};

13
src/core/memory.cpp
View file

@ -8,6 +8,8 @@ using namespace KernelMemoryTypes;
Memory::Memory(u64& cpuTicks) : cpuTicks(cpuTicks) {
fcram = new uint8_t[FCRAM_SIZE]();
dspRam = new uint8_t[DSP_RAM_SIZE]();
readTable.resize(totalPageCount, 0);
writeTable.resize(totalPageCount, 0);
memoryInfo.reserve(32); // Pre-allocate some room for memory allocation info to avoid dynamic allocs
@ -49,6 +51,17 @@ void Memory::reset() {
Helpers::panic("Failed to reserve memory for shared memory block");
}
}
// Map DSP RAM as R/W at [0x1FF00000, 0x1FF7FFFF]
constexpr u32 dspRamPages = DSP_RAM_SIZE / pageSize; // Number of DSP RAM pages
constexpr u32 initialPage = VirtualAddrs::DSPMemStart / pageSize; // First page of DSP RAM in the virtual address space
for (u32 i = 0; i < dspRamPages; i++) {
auto pointer = uintptr_t(&dspRam[i * pageSize]);
readTable[i + initialPage] = pointer;
writeTable[i + initialPage] = pointer;
}
}
u8 Memory::read8(u32 vaddr) {