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#include "ultra64.h"
s32 osPfsInitPak(OSMesgQueue* queue, OSPfs* pfs, s32 channel) {
s32 ret;
u16 sum;
u16 isum;
u8 temp[BLOCKSIZE];
__OSPackId* id;
__OSPackId newid;
__osSiGetAccess();
ret = __osPfsGetStatus(queue, channel);
__osSiRelAccess();
if (ret != 0) {
return ret;
}
pfs->queue = queue;
pfs->channel = channel;
pfs->status = 0;
if ((ret = __osPfsCheckRamArea(pfs)) != 0) {
return ret;
}
if ((ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, PFS_ID_0AREA, temp)) != 0) {
return (ret);
}
__osIdCheckSum((u16*)temp, &sum, &isum);
id = (__OSPackId*)temp;
if ((id->checksum != sum) || (id->invertedChecksum != isum)) {
if ((ret = __osCheckPackId(pfs, id)) != 0) {
pfs->status |= PFS_ID_BROKEN;
return ret;
}
}
if ((id->deviceid & 0x01) == 0) {
ret = __osRepairPackId(pfs, id, &newid);
if (ret) {
if (ret == PFS_ERR_ID_FATAL) {
pfs->status |= PFS_ID_BROKEN;
}
return ret;
}
id = &newid;
if ((id->deviceid & 0x01) == 0) {
return PFS_ERR_DEVICE;
}
}
bcopy(id, pfs->id, BLOCKSIZE);
if (1) {}
pfs->version = id->version;
pfs->banks = id->banks;
pfs->inodeStartPage = 1 + DEF_DIR_PAGES + (2 * pfs->banks);
pfs->dir_size = DEF_DIR_PAGES * PFS_ONE_PAGE;
pfs->inode_table = 1 * PFS_ONE_PAGE;
pfs->minode_table = (1 + pfs->banks) * PFS_ONE_PAGE;
pfs->dir_table = pfs->minode_table + (pfs->banks * PFS_ONE_PAGE);
if ((ret = __osContRamRead(pfs->queue, pfs->channel, PFS_LABEL_AREA, pfs->label)) != 0) {
return ret;
}
ret = osPfsChecker(pfs);
pfs->status |= PFS_INITIALIZED;
return ret;
}
s32 __osPfsCheckRamArea(OSPfs* pfs) {
s32 i = 0;
s32 ret = 0;
u8 temp1[BLOCKSIZE];
u8 temp2[BLOCKSIZE];
u8 saveReg[BLOCKSIZE];
if ((ret = __osPfsSelectBank(pfs, PFS_ID_BANK_256K)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, 0, saveReg)) != 0) {
return ret;
}
for (i = 0; i < BLOCKSIZE; i++) {
temp1[i] = i;
}
if ((ret = __osContRamWrite(pfs->queue, pfs->channel, 0, temp1, 0)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, 0, temp2)) != 0) {
return ret;
}
if (bcmp(temp1, temp2, BLOCKSIZE) != 0) {
return PFS_ERR_DEVICE;
}
return __osContRamWrite(pfs->queue, pfs->channel, 0, saveReg, 0);
}
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