Shipwright/soh/src/libultra/io/contpfs.c

310 lines
8.4 KiB
C
Raw Normal View History

#include "ultra64.h"
#include "global.h"
s32 __osPfsInodeCacheChannel = -1;
u8 __osPfsInodeCacheBank = 250;
u16 __osSumcalc(u8* ptr, s32 length) {
s32 i;
u32 sum = 0;
u8* temp = ptr;
for (i = 0; i < length; i++) {
sum += *temp++;
}
return sum & 0xFFFF;
}
s32 __osIdCheckSum(u16* ptr, u16* checkSum, u16* idSum) {
u16 data = 0;
u32 i;
*checkSum = *idSum = 0;
for (i = 0; i < ((sizeof(__OSPackId) - sizeof(uintptr_t)) / sizeof(u8)); i += 2) {
data = *((u16*)((uintptr_t)ptr + i));
*checkSum += data;
*idSum += ~data;
}
return 0;
}
s32 __osRepairPackId(OSPfs* pfs, __OSPackId* badid, __OSPackId* newid) {
s32 ret = 0;
u8 temp[BLOCKSIZE];
u8 comp[BLOCKSIZE];
u8 mask = 0;
s32 i, j = 0;
u16 index[4];
newid->repaired = 0xFFFFFFFF;
newid->random = osGetCount();
newid->serialMid = badid->serialMid;
newid->serialLow = badid->serialLow;
if ((pfs->activebank != 0) && ((ret = __osPfsSelectBank(pfs, 0)) != 0)) {
return ret;
}
do {
if ((ret = __osPfsSelectBank(pfs, j)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, 0, temp)) != 0) {
return ret;
}
temp[0] = j | 0x80;
for (i = 1; i < BLOCKSIZE; i++) {
temp[i] = ~temp[i];
}
if ((ret = __osContRamWrite(pfs->queue, pfs->channel, 0, temp, 0)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, 0, comp)) != 0) {
return (ret);
}
for (i = 0; i < BLOCKSIZE; i++) {
if (comp[i] != temp[i]) {
break;
}
}
if (i != BLOCKSIZE) {
break;
}
if (j > 0) {
if ((ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, 0, temp)) != 0) {
return ret;
}
if (temp[0] != 0x80) {
break;
}
}
j++;
} while (j < PFS_MAX_BANKS);
if ((pfs->activebank != 0) && (ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
mask = (j > 0) ? 1 : 0;
newid->deviceid = (badid->deviceid & 0xFFFE) | mask;
newid->banks = j;
newid->version = badid->version;
__osIdCheckSum((u16*)newid, &newid->checksum, &newid->invertedChecksum);
index[0] = PFS_ID_0AREA;
index[1] = PFS_ID_1AREA;
index[2] = PFS_ID_2AREA;
index[3] = PFS_ID_3AREA;
for (i = 0; i < 4; i++) {
if ((ret = __osContRamWrite(pfs->queue, pfs->channel, index[i], (u8*)newid, PFS_FORCE)) != 0) {
return ret;
}
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, PFS_ID_0AREA, temp)) != 0) {
return ret;
}
for (i = 0; i < BLOCKSIZE; i++) {
if (temp[i] != *(u8*)((s32)newid + i)) {
return PFS_ERR_DEVICE;
}
}
return 0;
}
s32 __osCheckPackId(OSPfs* pfs, __OSPackId* check) {
u16 index[4];
s32 ret = 0;
u16 sum;
u16 idSum;
s32 i;
s32 j;
if ((pfs->activebank != 0) && (ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
index[0] = PFS_ID_0AREA;
index[1] = PFS_ID_1AREA;
index[2] = PFS_ID_2AREA;
index[3] = PFS_ID_3AREA;
for (i = 1; i < 4; i++) {
if ((ret = __osContRamRead(pfs->queue, pfs->channel, index[i], (u8*)check)) != 0) {
return ret;
}
__osIdCheckSum((u16*)check, &sum, &idSum);
if ((check->checksum == sum) && (check->invertedChecksum == idSum)) {
break;
}
}
if (i == 4) {
return PFS_ERR_ID_FATAL;
}
for (j = 0; j < 4; j++) {
if (j != i) {
if ((ret = __osContRamWrite(pfs->queue, pfs->channel, index[j], (u8*)check, PFS_FORCE)) != 0) {
return ret;
}
}
}
return 0;
}
s32 __osGetId(OSPfs* pfs) {
u16 sum;
u16 isum;
u8 temp[BLOCKSIZE];
__OSPackId* id;
__OSPackId newid;
s32 ret;
if (pfs->activebank != 0) {
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)) == PFS_ERR_ID_FATAL) {
ret = __osRepairPackId(pfs, id, &newid);
if (ret) {
return ret;
}
id = &newid;
} else if (ret != 0) {
return ret;
}
}
if ((id->deviceid & 0x01) == 0) {
ret = __osRepairPackId(pfs, id, &newid);
if (ret) {
return ret;
}
id = &newid;
if ((id->deviceid & 0x01) == 0) {
return PFS_ERR_DEVICE;
}
}
bcopy(id, pfs->id, BLOCKSIZE);
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;
}
return 0;
}
s32 __osCheckId(OSPfs* pfs) {
u8 temp[BLOCKSIZE];
s32 ret;
if (pfs->activebank != 0) {
ret = __osPfsSelectBank(pfs, 0);
if (ret == PFS_ERR_NEW_PACK) {
ret = __osPfsSelectBank(pfs, 0);
}
if (ret != 0) {
return ret;
}
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, PFS_ID_0AREA, temp)) != 0) {
if (ret != PFS_ERR_NEW_PACK) {
return ret;
}
if ((ret = __osContRamRead(pfs->queue, pfs->channel, PFS_ID_0AREA, temp)) != 0) {
return ret;
}
}
if (bcmp(pfs->id, temp, BLOCKSIZE) != 0) {
return PFS_ERR_NEW_PACK;
}
return 0;
}
s32 __osPfsRWInode(OSPfs* pfs, __OSInode* inode, u8 flag, u8 bank) {
u8 sum;
s32 j;
s32 ret;
s32 offset;
u8* addr;
if (flag == PFS_READ && bank == __osPfsInodeCacheBank && (pfs->channel == __osPfsInodeCacheChannel)) {
bcopy(&__osPfsInodeCache, inode, sizeof(__OSInode));
return 0;
}
if ((pfs->activebank != 0) && (ret = __osPfsSelectBank(pfs, 0)) != 0) {
return ret;
}
offset = ((bank > 0) ? 1 : pfs->inodeStartPage);
if (flag == PFS_WRITE) {
inode->inodePage[0].inode_t.page =
__osSumcalc((u8*)(inode->inodePage + offset), (PFS_INODE_SIZE_PER_PAGE - offset) * 2);
}
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = (u8*)(((u8*)inode) + (j * BLOCKSIZE));
if (flag == PFS_WRITE) {
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->inode_table + (bank * PFS_ONE_PAGE) + j, addr, 0);
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->minode_table + (bank * PFS_ONE_PAGE) + j, addr, 0);
} else {
ret = __osContRamRead(pfs->queue, pfs->channel, pfs->inode_table + (bank * PFS_ONE_PAGE) + j, addr);
}
if (ret) {
return ret;
}
}
if (flag == PFS_READ) {
sum = __osSumcalc((u8*)(inode->inodePage + offset), (PFS_INODE_SIZE_PER_PAGE - offset) * 2);
if (sum != inode->inodePage[0].inode_t.page) {
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = (u8*)(((u8*)inode) + (j * BLOCKSIZE));
ret = __osContRamRead(pfs->queue, pfs->channel, pfs->minode_table + (bank * PFS_ONE_PAGE) + j, addr);
}
sum = __osSumcalc((u8*)(inode->inodePage + offset), (PFS_INODE_SIZE_PER_PAGE - offset) * 2);
if (sum != inode->inodePage[0].inode_t.page) {
return PFS_ERR_INCONSISTENT;
}
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = (u8*)(((u8*)inode) + (j * BLOCKSIZE));
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->inode_table + (bank * PFS_ONE_PAGE) + j, addr, 0);
}
}
}
__osPfsInodeCacheBank = bank;
bcopy(inode, &__osPfsInodeCache, sizeof(__OSInode));
__osPfsInodeCacheChannel = pfs->channel;
return 0;
}