mirror of https://github.com/pmret/papermario.git
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
#include "PR/controller.h"
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#include "PR/osint.h"
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#include "PR/siint.h"
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s32 __osPfsLastChannel = -1;
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s32 __osContRamRead(OSMesgQueue *mq, int channel, u16 address, u8 *buffer) {
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s32 ret;
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u8* ptr;
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s32 i;
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int retry = 2;
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__osSiGetAccess();
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do {
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ptr = (u8 *)(&__osPfsPifRam);
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if (__osContLastCmd != CONT_CMD_READ_MEMPACK || __osPfsLastChannel != channel) {
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__osContLastCmd = CONT_CMD_READ_MEMPACK;
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__osPfsLastChannel = channel;
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for (i = 0; i < channel; i++) {
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*ptr++ = 0;
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}
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__osPfsPifRam.pifstatus = CONT_CMD_EXE;
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((__OSContRamReadFormat *)ptr)->dummy = 0xff;
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((__OSContRamReadFormat *)ptr)->txsize = 3;
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((__OSContRamReadFormat *)ptr)->rxsize = 33;
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((__OSContRamReadFormat *)ptr)->cmd = CONT_CMD_READ_MEMPACK;
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((__OSContRamReadFormat *)ptr)->datacrc = 0xff;
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ptr[sizeof(__OSContRamReadFormat)] = CONT_CMD_END;
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} else {
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ptr += channel;
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}
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((__OSContRamReadFormat *)ptr)->addrh = address >> 3;
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((__OSContRamReadFormat *)ptr)->addrl = (address << 5) | __osContAddressCrc(address) ;
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__osSiRawStartDma(OS_WRITE, &__osPfsPifRam);
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osRecvMesg(mq, NULL, OS_MESG_BLOCK);
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__osSiRawStartDma(OS_READ, &__osPfsPifRam);
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osRecvMesg(mq, NULL, OS_MESG_BLOCK);
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ret = (((__OSContRamReadFormat *)ptr)->rxsize & 0xC0) >> 4;
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if (ret == 0) {
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if (__osContDataCrc(((__OSContRamReadFormat *)ptr)->data) != ((__OSContRamReadFormat *)ptr)->datacrc) {
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ret = __osPfsGetStatus(mq, channel);
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if (ret != 0) {
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break;
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} else {
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ret = PFS_ERR_CONTRFAIL;
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}
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} else {
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bcopy(((__OSContRamReadFormat *)ptr)->data, buffer, BLOCKSIZE);
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}
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} else {
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ret = PFS_ERR_NOPACK;
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}
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} while (ret == PFS_ERR_CONTRFAIL && retry-- >= 0);
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__osSiRelAccess();
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return ret;
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}
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