30 lines
844 B
C
30 lines
844 B
C
#include "libultra_internal.h"
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#include "hardware.h"
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extern u32 osRomBase; // TODO: figure out why this is like this
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s32 osPiRawStartDma(s32 dir, u32 cart_addr, void *dram_addr, size_t size) {
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register int status;
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status = HW_REG(PI_STATUS_REG, u32);
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while (status & (PI_STATUS_BUSY | PI_STATUS_IOBUSY | PI_STATUS_ERROR)) {
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status = HW_REG(PI_STATUS_REG, u32);
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}
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HW_REG(PI_DRAM_ADDR_REG, void *) = (void *) osVirtualToPhysical(dram_addr);
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HW_REG(PI_CART_ADDR_REG, void *) = (void *) (((uintptr_t) osRomBase | cart_addr) & 0x1fffffff);
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switch (dir) {
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case 0:
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HW_REG(PI_WR_LEN_REG, u32) = size - 1;
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break;
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case 1:
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HW_REG(PI_RD_LEN_REG, u32) = size - 1;
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break;
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default:
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return -1;
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break;
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}
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return 0;
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}
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