ref: d0ab3a0dd8f6355b3603d0fb04043a9ae867639b
dir: /libnandfs/init.c/
#include "logfsos.h" #include "logfs.h" #include "nandfs.h" #include "local.h" uchar _nandfsvalidtags[] = { LogfsTnone, LogfsTboot, LogfsTlog, LogfsTdata, }; int _nandfsvalidtagscount = nelem(_nandfsvalidtags); static int l2(long n) { int i; for (i = 0; i < 32; i++) if ((1 << i) >= n) return i; return 0; } char * nandfsinit(void *magic, long rawsize, long rawblocksize, char *(*read)(void *magic, void *buf, long nbytes, ulong offset), char *(*write)(void *magic, void *buf, long nbytes, ulong offset), char *(*erase)(void *magic, long blockaddr), char *(*sync)(void *magic), LogfsLowLevel **llp) { Nandfs *nandfs; nandfs = nandfsrealloc(nil, sizeof(*nandfs)); if (nandfs == nil) return Enomem; if (rawblocksize % NandfsFullSize) return "unsupported block size"; if (rawsize % rawblocksize) return "size not multiple of block size"; nandfs->read = read; nandfs->write = write; nandfs->erase = erase; nandfs->sync = sync; nandfs->magic = magic; nandfs->limitblock = rawsize / rawblocksize; //print("rawsize %ld\n", rawsize); //print("rawblocksize %ld\n", rawblocksize); //print("limitblock %ld\n", nandfs->limitblock); nandfs->rawblocksize = rawblocksize; /* fill in upper interface */ nandfs->ll.pathbits = NandfsPathBits; nandfs->ll.blocks = 0; nandfs->ll.l2pagesize = NandfsL2PageSize; nandfs->ll.l2pagesperblock = l2(rawblocksize / NandfsFullSize); nandfs->ll.open = (LOGFSOPENFN *)nandfsopen; nandfs->ll.getblocktag = (LOGFSGETBLOCKTAGFN *)nandfsgettag; nandfs->ll.setblocktag = (LOGFSSETBLOCKTAGFN *)nandfssettag; nandfs->ll.getblockpath = (LOGFSGETBLOCKPATHFN *)nandfsgetpath; nandfs->ll.setblockpath = (LOGFSSETBLOCKPATHFN *)nandfssetpath; nandfs->ll.getblockpartialformatstatus = (LOGFSGETBLOCKPARTIALFORMATSTATUSFN *)nandfsgetblockpartialformatstatus; nandfs->ll.findfreeblock = (LOGFSFINDFREEBLOCKFN *)nandfsfindfreeblock; nandfs->ll.readpagerange = (LOGFSREADPAGERANGEFN *)nandfsreadpagerange; nandfs->ll.writepage = (LOGFSWRITEPAGEFN *)nandfswritepage; nandfs->ll.readblock = (LOGFSREADBLOCKFN *)nandfsreadblock; nandfs->ll.writeblock = (LOGFSWRITEBLOCKFN *)nandfswriteblock; nandfs->ll.eraseblock = (LOGFSERASEBLOCKFN *)nandfseraseblock; nandfs->ll.formatblock = (LOGFSFORMATBLOCKFN *)nandfsformatblock; nandfs->ll.reformatblock = (LOGFSREFORMATBLOCKFN *)nandfsreformatblock; nandfs->ll.markblockbad = (LOGFSMARKBLOCKBADFN *)nandfsmarkblockbad; nandfs->ll.getbaseblock = (LOGFSGETBASEBLOCKFN *)nandfsgetbaseblock; nandfs->ll.getblocksize = (LOGFSGETBLOCKSIZEFN *)nandfsgetblocksize; nandfs->ll.calcrawaddress = (LOGFSCALCRAWADDRESSFN *)nandfscalcrawaddress; nandfs->ll.getblockstatus = (LOGFSGETBLOCKSTATUSFN *)nandfsgetblockstatus; nandfs->ll.calcformat = (LOGFSCALCFORMATFN *)nandfscalcformat; nandfs->ll.getopenstatus = (LOGFSGETOPENSTATUSFN *)nandfsgetopenstatus; nandfs->ll.free = (LOGFSFREEFN *)nandfsfree; nandfs->ll.sync = (LOGFSSYNCFN *)nandfssync; *llp = (LogfsLowLevel *)nandfs; return nil; } void nandfsfree(Nandfs *nandfs) { if (nandfs) { nandfsfreemem(nandfs->blockdata); nandfsfreemem(nandfs); } } void nandfssetmagic(Nandfs *nandfs, void *magic) { nandfs->magic = magic; } char * nandfssync(Nandfs *nandfs) { return (*nandfs->sync)(nandfs->magic); }