1 files changed, 112 insertions, 0 deletions
diff --git a/src/libultra_code_O2/pfsinitpak.c b/src/libultra_code_O2/pfsinitpak.c
new file mode 100644
index 000000000..377c4f6a5
--- /dev/null
+++ b/src/libultra_code_O2/pfsinitpak.c
@@ -0,0 +1,112 @@
+#include "ultra64.h"
+#include "global.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 (0) {}
+
+    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;
+    }
+    ret = __osContRamWrite(pfs->queue, pfs->channel, 0, saveReg, 0);
+
+    return ret;
+}