48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
#include <memory>
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#include "recomp.h"
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#include "../portultra/ultra64.h"
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extern std::unique_ptr<uint8_t[]> rom;
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extern size_t rom_size;
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extern "C" void osCartRomInit_recomp(uint8_t* restrict rdram, recomp_context* restrict ctx) {
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;
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}
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extern "C" void osCreatePiManager_recomp(uint8_t* restrict rdram, recomp_context* restrict ctx) {
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;
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}
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constexpr uint32_t rom_base = 0xB0000000;
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extern "C" void osPiStartDma_recomp(uint8_t* restrict rdram, recomp_context* restrict ctx) {
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uint32_t mb = ctx->r4;
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uint32_t pri = ctx->r5;
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uint32_t direction = ctx->r6;
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uint32_t devAddr = ctx->r7;
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uint32_t dramAddr = MEM_W(0x10, ctx->r29);
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uint32_t size = MEM_W(0x14, ctx->r29);
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uint32_t mq_ = MEM_W(0x18, ctx->r29);
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OSMesgQueue* mq = TO_PTR(OSMesgQueue, mq_);
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printf("[pi] DMA from 0x%08X into 0x%08X of size 0x%08X\n", devAddr, dramAddr, size);
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// TODO asynchronous transfer (will require preemption in the scheduler)
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// TODO this won't handle unaligned DMA
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memcpy(rdram + (dramAddr & 0x3FFFFFF), rom.get() + (devAddr | rom_base) - rom_base, size);
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// Send a message to the mq to indicate that the transfer completed
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osSendMesg(rdram, mq_, 0, OS_MESG_NOBLOCK);
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}
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extern "C" void osEPiStartDma_recomp(uint8_t* restrict rdram, recomp_context* restrict ctx) {
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;
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}
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extern "C" void osPiGetStatus_recomp(uint8_t * restrict rdram, recomp_context * restrict ctx) {
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ctx->r2 = 0;
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}
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extern "C" void osPiRawStartDma_recomp(uint8_t * restrict rdram, recomp_context * restrict ctx) {
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;
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} |