32 lines
871 B
C
32 lines
871 B
C
#include "global.h"
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//! Note that this is not the same as the original libultra
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//! osAiSetNextBuffer, see comments in the function
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s32 osAiSetNextBuffer(void* buf, size_t size) {
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static u8 D_80130500 = false;
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uintptr_t bufAdjusted = (uintptr_t)buf;
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s32 status;
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if (D_80130500) {
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bufAdjusted = (uintptr_t)buf - 0x2000;
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}
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if ((((uintptr_t)buf + size) & 0x1FFF) == 0) {
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D_80130500 = true;
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} else {
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D_80130500 = false;
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}
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// Originally a call to __osAiDeviceBusy
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status = HW_REG(AI_STATUS_REG, s32);
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if (status & AI_STATUS_AI_FULL) {
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return -1;
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}
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// OS_K0_TO_PHYSICAL replaces osVirtualToPhysical, this replacement
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// assumes that only KSEG0 addresses are given
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HW_REG(AI_DRAM_ADDR_REG, u32) = OS_K0_TO_PHYSICAL(bufAdjusted);
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HW_REG(AI_LEN_REG, u32) = size;
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return 0;
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}
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