--- /dev/null
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
+<HTML>
+<HEAD>
+ <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1">
+ <TITLE></TITLE>
+ <META NAME="GENERATOR" CONTENT="StarOffice/5.2 (Linux)">
+ <META NAME="AUTHOR" CONTENT=" ">
+ <META NAME="CREATED" CONTENT="20021129;9042700">
+ <META NAME="CHANGEDBY" CONTENT=" ">
+ <META NAME="CHANGED" CONTENT="20030121;16061100">
+</HEAD>
+<BODY>
+<H1>Example YAFFS Bootloader</H1>
+<H3>Licensing</H3>
+<P>The YAFFS bootloader is LGPL to facilitate integration into
+non-GPL code.</P>
+<H3>Software Modules</H3>
+<P>The software is designed in a modular fashion to facilitate
+integration and configuration.</P>
+<P>The software comprises the following main sections:</P>
+<UL>
+ <LI><P>yaffs_flashif.c NAND integration functions (to be completed
+ by integrator).</P>
+ <LI><P>nand_ecc.c: The ECC algorithms.</P>
+ <LI><P>yboot.c: Bootloader code to provide a file as a stream of
+ bytes in the bootloader.</P>
+</UL>
+<UL>
+ <LI><P>bootldtst.c: Test harness/example for bootloader.</P>
+</UL>
+<P>The bootloader does not implement YAFFS. Instead it is a simple
+set of routines which allows reading a file on a YAFFS device.</P>
+<P>The file must be in the root directory of the device (eg.
+"/boot/boot.bin") since the bootloader does not understand
+directories. This limitation simplifies the bootloader and speeds up
+the boot process.</P>
+<P>As shown here the bootloader is initialised, then provides the
+boot file as a stream of bytes. It is simple enough to provide the
+data in other formats.</P>
+<P>$Id: yaffs_boot.html,v 1.1 2003-01-21 03:34:12 charles Exp $</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+<P><BR><BR>
+</P>
+</BODY>
+</HTML>
\ No newline at end of file
--- /dev/null
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
+<HTML>
+<HEAD>
+ <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1">
+ <TITLE></TITLE>
+ <META NAME="GENERATOR" CONTENT="StarOffice/5.2 (Linux)">
+ <META NAME="AUTHOR" CONTENT=" ">
+ <META NAME="CREATED" CONTENT="20021129;9042700">
+ <META NAME="CHANGEDBY" CONTENT=" ">
+ <META NAME="CHANGED" CONTENT="20030121;16011900">
+</HEAD>
+<BODY>
+<H1>YAFFS Direct Interface (YDI)</H1>
+<H2>Now hear this!</H2>
+<P>YAFFS code is GPL. The YAFFS Direct Interface(YDI) is really
+intended to provide a direct interface to YAFFS in an embedded/RTOS
+environment. Using YAFFS in this way might violate GPL. Aleph One are
+looking at ways to make YAFFS licensing more flexible to support both
+GPL and YDI users. For further info, please contact Aleph One.</P>
+<H3>Purpose</H3>
+<P>The purpose of the YAFFS Direct Interface is to provide YAFFS to
+embedded/RTOS environments where full file system support is not
+available. Typically, therefore, YDI is intended for smaller embedded
+systems.</P>
+<H3>Software Modules</H3>
+<P>The software is designed in a modular fashion to facilitate
+integration and configuration.</P>
+<P>The software comprises the following main sections:</P>
+<UL>
+ <LI><P>yaffscfg.c Configuration. Set up various device features etc
+ and some OS integration (eg. locking function). Allows tuning.</P>
+ <LI><P>yaffsfs.c: File system interface functions (and associated
+ header file for inclusion in application code).
+ </P>
+ <LI><P>yaffs_flashif.c NAND integration functions (to be completed
+ by the integrator) This currently holds a second ramdisk for test
+ purposes.</P>
+ <LI><P>yaffs_guts.c: The file system algorithms for yaffs.</P>
+ <LI><P>nand_ecc.c: The ECC algorithms.</P>
+ <LI><P>yaffs_ramdisk.c: RAMdisk support code.</P>
+ <LI><P>yaffs_fileem.c: Flash emulation on a host file. This is for
+ testing purposes only.</P>
+ <LI><P>dtest.c: Test harness functions.</P>
+</UL>
+<P><BR><BR>
+</P>
+<H2>General Notes</H2>
+<H3>Licensing</H3>
+<P>The YAFFS file system is GPL.</P>
+<P>The YAFFS bootloader and header files are LGPL to allow
+incorporation of these into proprietary code.</P>
+<P>nand_ecc.c, copyright SJ Hill, is LGPL.</P>
+<H3>File names</H3>
+<P>Multiple partitions are defined by setting up the partition table
+in yaffscfg.c.</P>
+<P>The system has no concept of current directory, therefore all
+names and paths must be fully specified. eg. "/boot/xxx"</P>
+<P>Names are case sensitive.
+</P>
+<P>The divider between path elements is '/'. eg "/ram/dir/file".</P>
+<H3>Permissions and attributes</H3>
+<P>The following permissions are supported in mode: S_IREAD,
+S_IWRITE.</P>
+<P>The following opening modes are checked: O_RDONLY, O_WRONLY,
+O_RDWR, O_EXCL.</P>
+<P>Times are just flat 32-bit numbers. The meaning of these numbers
+is OS dependent and is defined by completing the funbctiuon
+yaffsfs_CurrentTime() in yaffscfg.c</P>
+<P>Attributes are stored as a 32-bit unsigned value. Some of these
+are reserved. Others are used transparently (and may be used for
+additional information by the application). Reserved are:</P>
+<UL>
+ <LI><P>S_IREAD, S_IWRITE.</P>
+ <LI><P>S_IFMT, the file type bit-field for S_IFREG, S_IFDIR and
+ S_IFLNK.</P>
+</UL>
+<P><BR><BR>
+</P>
+<H3>Threading</H3>
+<P>All yaffs routines are thread safe when called through the
+specified interface.</P>
+<P>All yaffs routines are controlled by a single locking
+mutex/semaphore by defining yaffsfs_Lock() and yaffsfs_Unlock() in
+yaffscfg.c.
+</P>
+<P>Thus, only one thread is able to execute yaffs functions at a
+time. Most yaffs functions execute quickly, so this generally not a
+limitation.</P>
+<H3>Compilation Configuration</H3>
+<P>Configuration is done in four places:
+</P>
+<UL>
+ <LI><P>yaffscfg.c: OS specific functions</P>
+ <LI><P>yaffscfg.h: Preferably only change YAFFSFS_N_HANDLES, the
+ number of files that can be simultaneously opened.</P>
+ <LI><P>yportenv.h: Preferably do not change this.</P>
+ <LI><P>Compile options. The valid compile options for the YAFFS
+ direct interface are:</P>
+ <LI><P>CONFIG_YAFFS_DIRECT must be enabled to use the direct
+ interface.</P>
+ <LI><P>CONFIG_YAFFS_SHORT_NAMES_IN_RAM define to enable short name
+ caching. This is suggested in cases unless RAM is very limited.</P>
+</UL>
+<H3>Device Configuration</H3>
+<P>The device configuration table is set up in yaffscfg.c and
+specifies what devices are in the system. The order is important
+since this is the order that is used when searching for
+files/directories and provides the "switch" mechanism to
+support multiple "mount points"</P>
+<P>The device configuration has the form:</P>
+<P STYLE="margin-left: 2cm"><FONT FACE="Courier, monospace">struct {
+<BR>const char *prefix;<BR>yaffs_Device *dev;<BR>};</FONT></P>
+<P>eg.</P>
+<P STYLE="margin-left: 2cm"><FONT FACE="Courier, monospace">{<BR>{"/ram",ramDevice},
+<BR>{"/boot",bootDevice},<BR>{"/flash",flashDevice},<BR>{NULL,NULL}<BR>}</FONT></P>
+<P>Note that multiple yaffs_Devices can share a single physical NAND
+device by "partitioning". Thus, for instance, /boot and
+/data may be on the same physical device, just with non-overlapping
+regions.</P>
+<P>Different properties may be attached to the different yaffs_Device
+entries. For example note that the RAM disk is set up with different
+NANDECC flags.</P>
+<H4>API Notes</H4>
+<P>int yaffs_open(const char *path, int oflag, int mode) ;</P>
+<P>Supported flags O_CREAT, O_EXCL, O_TRUNC, O_APPEND, O_RDONLY,
+O_RDWR, O_WRONLY.</P>
+<P>int yaffs_read(int fd, void *buf, unsigned int nbyte) ;</P>
+<P>int yaffs_write(int fd, const void *buf, unsigned int nbyte) ;</P>
+<P>int yaffs_close(int fd) ;</P>
+<P>off_t yaffs_lseek(int fd, off_t offset, int whence) ;</P>
+<P>int yaffs_unlink(const char *path) ;</P>
+<P>int yaffs_rename(const char *old, const char *new) ;</P>
+<P>int yaffs_stat(const char *path, struct stat *buf) ;</P>
+<P>int yaffs_lstat(const char *path, struct stat *buf) ;</P>
+<P>int yaffs_fstat(int fd, struct, struct stat *buf) ;</P>
+<P>int yaffs_chmod(const char *path, mode_t mode) ;</P>
+<P>int yaffs_fchmod(int fd, struct, mode_t mode) ;</P>
+<P>int yaffs_mkdir(const char *path, mode_t mode) ;</P>
+<P>int yaffs_rmdir(const char *path) ;</P>
+<P>yaffs_DIR *yaffs_opendir(const char *dirname) ;</P>
+<P>struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ;</P>
+<P>void yaffs_rewinddir(yaffs_DIR *dirp) ;</P>
+<P>int yaffs_closedir(yaffs_DIR *dirp) ;</P>
+<P>int yaffs_mount(const char *path) ;</P>
+<P>int yaffs_unmount(const char *path) ;</P>
+<P>int yaffs_symlink(const char *oldpath, const char *newpath);
+</P>
+<P>int yaffs_readlink(const char *path, char *buf, size_t bufsiz);
+</P>
+<P>int yaffs_link(const char *oldpath, const char *newpath);
+</P>
+<P>int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev);</P>
+<P>off_t yaffs_freespace(const char *path);</P>
+<H3><BR><BR>
+</H3>
+<P>$Id: yaffs_direct.html,v 1.1 2003-01-21 03:34:12 charles Exp $</P>
+<P><BR><BR>
+</P>
+</BODY>
+</HTML>
\ No newline at end of file
--- /dev/null
+# Makefile for YAFFS direct test
+#
+# Copyright (C) 2003 Aleph One Ltd.
+#
+# Created by Charles Manning <charles@aleph1.co.uk>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# NB Warning this Makefile does not include header dependencies.
+#
+# $Id: Makefile,v 1.1 2003-01-21 03:32:17 charles Exp $
+
+CFLAGS = -Wall -DCONFIG_YAFFS_DIRECT -DCONFIG_YAFFS_SHORT_NAMES_IN_RAM -g
+#CFLAGS+= -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wmissing-declarations
+#CFLAGS+= -Wmissing-prototypes -Wredundant-decls -Wnested-externs -Winline
+
+
+DIRECTTESTOBJS = dtest.o nand_ecc.o yaffscfg.o yaffs_fileem.o yaffsfs.o yaffs_ramdisk.o yaffs_guts.o
+
+BOOTTESTOBJS = bootldtst.o yboot.o yaffs_fileem.o nand_ecc.o
+
+ALLOBJS = dtest.o nand_ecc.o yaffscfg.o yaffs_fileem.o yaffsfs.o yaffs_ramdisk.o bootldtst.o yboot.o
+
+SYMLINKS = devextras.h nand_ecc.c yaffs_guts.c yaffs_guts.h yaffsinterface.h yportenv.h
+
+all: directtest boottest
+
+$(ALLOBJS): %.o: %.c
+ gcc -c $(CFLAGS) $< -o $@
+
+$(SYMLINKS):
+ ln -s ../$@ $@
+
+directtest: $(SYMLINKS) $(DIRECTTESTOBJS)
+ gcc -o $@ $(DIRECTTESTOBJS)
+
+
+boottest: $(SYMLINKS) $(BOOTTESTOBJS)
+ gcc -o $@ $(BOOTTESTOBJS)
+
+
+clean:
+ rm -f $(ALLOBJS) core
--- /dev/null
+
+
+#include <stdio.h>
+
+#include "yaffs_guts.h"
+#include "yaffs_flashif.h"
+
+#include "yboot.h"
+
+
+unsigned yaffs_traceMask = 0xFFFFFFFF;
+
+static void InitDevice(yaffs_Device *dev)
+{
+ // Initialise the NAND device. This should agree with what is set in yaffscfg for /boot
+
+ // /boot
+ // Only some of these parameters are actually used.
+ dev->nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ dev->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ dev->startBlock = 1; // Can't use block 0
+ dev->endBlock = 127; // Last block in 2MB.
+ dev->useNANDECC = 0; // use YAFFS's ECC
+ dev->nShortOpCaches = 10; // Use caches
+ dev->genericDevice = (void *) 1; // Used to identify the device in fstat.
+ dev->writeChunkToNAND = yflash_WriteChunkToNAND;
+ dev->readChunkFromNAND = yflash_ReadChunkFromNAND;
+ dev->eraseBlockInNAND = yflash_EraseBlockInNAND;
+ dev->initialiseNAND = yflash_InitialiseNAND;
+}
+
+
+int main()
+{
+ int oId;
+
+ char ch;
+ int nBytes = 0;
+ int fsize;
+
+ yaffs_Device dev;
+
+ printf("Test boot code\n");
+
+ InitDevice(&dev);
+
+ oId = yaffsboot_InitFile(&dev,"yyfile",&fsize);
+
+ printf("ObjectId = %d, size is %d\n",oId,fsize);
+
+ if(oId < 0)
+ {
+ printf("File not found\n");
+ }
+ else
+ {
+ printf("dumping file as text\n\n");
+
+ nBytes = 0;
+
+ while(yaffsboot_ReadByte(&ch) >= 0)
+ {
+ printf("%c",ch);
+ nBytes++;
+ }
+
+ printf("\n\n%d bytes read\n",nBytes);
+ }
+
+
+
+
+}
--- /dev/null
+/*
+* Test code for the "direct" interface.
+*/
+
+
+#include <stdio.h>
+#include <string.h>
+
+#include "yaffsfs.h"
+
+char xx[600];
+
+void copy_in_a_file(char *yaffsName,char *inName)
+{
+ int inh,outh;
+ unsigned char buffer[100];
+ int ni,no;
+ inh = open(inName,O_RDONLY);
+ outh = yaffs_open(yaffsName, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
+
+ while((ni = read(inh,buffer,100)) > 0)
+ {
+ no = yaffs_write(outh,buffer,ni);
+ if(ni != no)
+ {
+ printf("problem writing yaffs file\n");
+ }
+
+ }
+
+ yaffs_close(outh);
+ close(inh);
+}
+
+
+
+
+
+void fill_disk(char *path,int nfiles)
+{
+ int h;
+ int n;
+ int result;
+
+ char str[50];
+
+ for(n = 0; n < nfiles; n++)
+ {
+ sprintf(str,"%s/%d",path,n);
+
+ h = yaffs_open(str, O_CREAT | O_RDWR | O_TRUNC, S_IREAD | S_IWRITE);
+
+ printf("writing file %s handle %d ",str, h);
+
+ while ((result = yaffs_write(h,xx,600)) == 600)
+ {
+ //printf(".");
+ }
+ result = yaffs_close(h);
+ printf(" close %d\n",result);
+ }
+}
+
+void fill_disk_and_delete(char *path, int nfiles, int ncycles)
+{
+ int i,j;
+ char str[50];
+ int result;
+
+ for(i = 0; i < ncycles; i++)
+ {
+ printf("@@@@@@@@@@@@@@ cycle %d\n",i);
+ fill_disk(path,nfiles);
+
+ for(j = 0; j < nfiles; j++)
+ {
+ sprintf(str,"%s/%d",path,j);
+ result = yaffs_unlink(str);
+ printf("unlinking file %s, result %d\n",str,result);
+ }
+ }
+}
+
+void dumpDirFollow(const char *dname)
+{
+ yaffs_DIR *d;
+ yaffs_dirent *de;
+ struct yaffs_stat s;
+ char str[100];
+
+ d = yaffs_opendir(dname);
+
+ if(!d)
+ {
+ printf("opendir failed\n");
+ }
+ else
+ {
+ while((de = yaffs_readdir(d)) != NULL)
+ {
+ sprintf(str,"%s/%s",dname,de->d_name);
+
+ yaffs_stat(str,&s);
+
+ printf("%s length %d mode %X ",de->d_name,s.st_size,s.st_mode);
+ switch(s.st_mode & S_IFMT)
+ {
+ case S_IFREG: printf("data file"); break;
+ case S_IFDIR: printf("directory"); break;
+ case S_IFLNK: printf("symlink -->");
+ if(yaffs_readlink(str,str,100) < 0)
+ printf("no alias");
+ else
+ printf("\"%s\"",str);
+ break;
+ default: printf("unknown"); break;
+ }
+
+ printf("\n");
+ }
+
+ yaffs_closedir(d);
+ }
+ printf("\n");
+
+ printf("Free space in %s is %d\n\n",dname,yaffs_freespace(dname));
+
+}
+void dumpDir(const char *dname)
+{
+ yaffs_DIR *d;
+ yaffs_dirent *de;
+ struct yaffs_stat s;
+ char str[100];
+
+ d = yaffs_opendir(dname);
+
+ if(!d)
+ {
+ printf("opendir failed\n");
+ }
+ else
+ {
+ while((de = yaffs_readdir(d)) != NULL)
+ {
+ sprintf(str,"%s/%s",dname,de->d_name);
+
+ yaffs_lstat(str,&s);
+
+ printf("%s length %d mode %X ",de->d_name,s.st_size,s.st_mode);
+ switch(s.st_mode & S_IFMT)
+ {
+ case S_IFREG: printf("data file"); break;
+ case S_IFDIR: printf("directory"); break;
+ case S_IFLNK: printf("symlink -->");
+ if(yaffs_readlink(str,str,100) < 0)
+ printf("no alias");
+ else
+ printf("\"%s\"",str);
+ break;
+ default: printf("unknown"); break;
+ }
+
+ printf("\n");
+ }
+
+ yaffs_closedir(d);
+ }
+ printf("\n");
+
+ printf("Free space in %s is %d\n\n",dname,yaffs_freespace(dname));
+
+}
+
+
+static void PermissionsCheck(const char *path, mode_t tmode, int tflags,int expectedResult)
+{
+ int fd;
+
+ if(yaffs_chmod(path,tmode)< 0) printf("chmod failed\n");
+
+ fd = yaffs_open(path,tflags,0);
+
+ if((fd >= 0) != (expectedResult > 0))
+ {
+ printf("Permissions check %x %x %d failed\n",tmode,tflags,expectedResult);
+ }
+ else
+ {
+ printf("Permissions check %x %x %d OK\n",tmode,tflags,expectedResult);
+ }
+
+
+ yaffs_close(fd);
+
+
+}
+
+int main(int argc, char *argv[])
+{
+
+ int f;
+ int r;
+ char buffer[20];
+
+ char str[100];
+
+ int h;
+ mode_t temp_mode;
+ struct yaffs_stat ystat;
+
+ yaffs_StartUp();
+
+ yaffs_mount("/boot");
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ f = yaffs_open("/boot/b1", O_RDONLY,0);
+
+ printf("open /boot/b1 readonly, f=%d\n",f);
+
+ f = yaffs_open("/boot/b1", O_CREAT,0);
+
+ printf("open /boot/b1 O_CREAT, f=%d\n",f);
+
+
+ r = yaffs_write(f,"hello",1);
+ printf("write %d attempted to write to a read-only file\n",r);
+
+ r = yaffs_close(f);
+
+ printf("close %d\n",r);
+
+ f = yaffs_open("/boot/b1", O_RDWR,0);
+
+ printf("open /boot/b1 O_RDWR,f=%d\n",f);
+
+
+ r = yaffs_write(f,"hello",2);
+ printf("write %d attempted to write to a writeable file\n",r);
+ r = yaffs_write(f,"world",3);
+ printf("write %d attempted to write to a writeable file\n",r);
+
+ r= yaffs_lseek(f,SEEK_END,0);
+ printf("seek end %d\n",r);
+ memset(buffer,0,20);
+ r = yaffs_read(f,buffer,10);
+ printf("read %d \"%s\"\n",r,buffer);
+ r= yaffs_lseek(f,SEEK_SET,0);
+ printf("seek set %d\n",r);
+ memset(buffer,0,20);
+ r = yaffs_read(f,buffer,10);
+ printf("read %d \"%s\"\n",r,buffer);
+ memset(buffer,0,20);
+ r = yaffs_read(f,buffer,10);
+ printf("read %d \"%s\"\n",r,buffer);
+
+
+ r = yaffs_close(f);
+
+ printf("close %d\n",r);
+
+ copy_in_a_file("/boot/yyfile","xxx");
+
+ // Create a file with a long name
+
+ copy_in_a_file("/boot/file with a long name","xxx");
+
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ // Check stat
+ r = yaffs_stat("/boot/file with a long name",&ystat);
+
+ // Check rename
+
+ r = yaffs_rename("/boot/file with a long name","/boot/r1");
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ // Check unlink
+ r = yaffs_unlink("/boot/r1");
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ // Check mkdir
+
+ r = yaffs_mkdir("/boot/directory1",0);
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+ printf("\nDirectory look-up of /boot/directory1\n");
+ dumpDir("/boot/directory1");
+
+ // add a file to the directory
+ copy_in_a_file("/boot/directory1/file with a long name","xxx");
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+ printf("\nDirectory look-up of /boot/directory1\n");
+ dumpDir("/boot/directory1");
+
+ // Attempt to delete directory (should fail)
+
+ r = yaffs_rmdir("/boot/directory1");
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+ printf("\nDirectory look-up of /boot/directory1\n");
+ dumpDir("/boot/directory1");
+
+ // Delete file first, then rmdir should work
+ r = yaffs_unlink("/boot/directory1/file with a long name");
+ r = yaffs_rmdir("/boot/directory1");
+
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+ printf("\nDirectory look-up of /boot/directory1\n");
+ dumpDir("/boot/directory1");
+
+#if 0
+ fill_disk_and_delete("/boot",20,20);
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+#endif
+
+ yaffs_symlink("yyfile","/boot/slink");
+
+ yaffs_readlink("/boot/slink",str,100);
+ printf("symlink alias is %s\n",str);
+
+
+
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+ printf("\nDirectory look-up of /boot (using stat instead of lstat)\n");
+ dumpDirFollow("/boot");
+ printf("\nDirectory look-up of /boot/directory1\n");
+ dumpDir("/boot/directory1");
+
+ h = yaffs_open("/boot/slink",O_RDWR,0);
+
+ printf("file length is %d\n",yaffs_lseek(h,0,SEEK_END));
+
+ yaffs_close(h);
+
+ yaffs_unlink("/boot/slink");
+
+
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ // Check chmod
+
+ yaffs_stat("/boot/yyfile",&ystat);
+ temp_mode = ystat.st_mode;
+
+ yaffs_chmod("/boot/yyfile",0x55555);
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ yaffs_chmod("/boot/yyfile",temp_mode);
+ printf("\nDirectory look-up of /boot\n");
+ dumpDir("/boot");
+
+ // Permission checks...
+ PermissionsCheck("/boot/yyfile",0, O_WRONLY,0);
+ PermissionsCheck("/boot/yyfile",0, O_RDONLY,0);
+ PermissionsCheck("/boot/yyfile",0, O_RDWR,0);
+
+ PermissionsCheck("/boot/yyfile",S_IREAD, O_WRONLY,0);
+ PermissionsCheck("/boot/yyfile",S_IREAD, O_RDONLY,1);
+ PermissionsCheck("/boot/yyfile",S_IREAD, O_RDWR,0);
+
+ PermissionsCheck("/boot/yyfile",S_IWRITE, O_WRONLY,1);
+ PermissionsCheck("/boot/yyfile",S_IWRITE, O_RDONLY,0);
+ PermissionsCheck("/boot/yyfile",S_IWRITE, O_RDWR,0);
+
+ PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_WRONLY,1);
+ PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_RDONLY,1);
+ PermissionsCheck("/boot/yyfile",S_IREAD | S_IWRITE, O_RDWR,1);
+
+ yaffs_chmod("/boot/yyfile",temp_mode);
+
+ //create a zero-length file and unlink it (test for scan bug)
+
+ h = yaffs_open("/boot/zlf",O_CREAT | O_TRUNC | O_RDWR,0);
+ yaffs_close(h);
+
+ yaffs_unlink("/boot/zlf");
+
+
+ yaffs_DumpDevStruct("/boot");
+
+ fill_disk_and_delete("/boot",20,20);
+
+ yaffs_DumpDevStruct("/boot");
+
+
+ return 0;
+
+}
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_ramdisk.c: yaffs ram disk component
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+// This provides a YAFFS nand emulation on a file.
+// THis is only intended as test code to test persistence etc.
+
+const char *yaffs_flashif_c_version = "$Id: yaffs_fileem.c,v 1.1 2003-01-21 03:32:17 charles Exp $";
+
+
+#include "yportenv.h"
+
+#include "yaffs_flashif.h"
+#include "yaffs_guts.h"
+#include "devextras.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+
+#define SIZE_IN_MB 16
+
+#define BLOCK_SIZE (32 * 528)
+#define BLOCKS_PER_MEG ((1024*1024)/(32 * 512))
+
+
+
+typedef struct
+{
+ __u8 data[528]; // Data + spare
+} yflash_Page;
+
+typedef struct
+{
+ yflash_Page page[32]; // The pages in the block
+
+} yflash_Block;
+
+
+
+typedef struct
+{
+ int handle;
+ int nBlocks;
+} yflash_Device;
+
+static yflash_Device filedisk;
+
+static int CheckInit(yaffs_Device *dev)
+{
+ static int initialised = 0;
+
+ int i;
+
+
+ int fSize;
+ int written;
+
+ yflash_Page p;
+
+ if(initialised)
+ {
+ return YAFFS_OK;
+ }
+
+ initialised = 1;
+
+
+ filedisk.nBlocks = (SIZE_IN_MB * 1024 * 1024)/(16 * 1024);
+
+ filedisk.handle = open("yaffsemfile", O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
+
+ if(filedisk.handle < 0)
+ {
+ perror("Failed to open yaffs emulation file");
+ return YAFFS_FAIL;
+ }
+
+
+ fSize = lseek(filedisk.handle,0,SEEK_END);
+
+ if(fSize < SIZE_IN_MB * 1024 * 1024)
+ {
+ printf("Creating yaffs emulation file\n");
+
+ lseek(filedisk.handle,0,SEEK_SET);
+
+ memset(&p,0xff,sizeof(yflash_Page));
+
+ for(i = 0; i < SIZE_IN_MB * 1024 * 1024; i+= 512)
+ {
+ written = write(filedisk.handle,&p,sizeof(yflash_Page));
+
+ if(written != sizeof(yflash_Page))
+ {
+ printf("Write failed\n");
+ return YAFFS_FAIL;
+ }
+ }
+ }
+
+ return 1;
+}
+
+int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
+{
+ int written;
+
+ CheckInit(dev);
+
+
+
+ if(data)
+ {
+ lseek(filedisk.handle,chunkInNAND * 528,SEEK_SET);
+ written = write(filedisk.handle,data,512);
+
+ if(written != 512) return YAFFS_FAIL;
+ }
+
+ if(spare)
+ {
+ lseek(filedisk.handle,chunkInNAND * 528 + 512,SEEK_SET);
+ written = write(filedisk.handle,spare,16);
+
+ if(written != 16) return YAFFS_FAIL;
+ }
+
+
+ return YAFFS_OK;
+
+}
+
+
+int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
+{
+ int nread;
+
+ CheckInit(dev);
+
+
+
+ if(data)
+ {
+ lseek(filedisk.handle,chunkInNAND * 528,SEEK_SET);
+ nread = read(filedisk.handle,data,512);
+
+ if(nread != 512) return YAFFS_FAIL;
+ }
+
+ if(spare)
+ {
+ lseek(filedisk.handle,chunkInNAND * 528 + 512,SEEK_SET);
+ nread= read(filedisk.handle,spare,16);
+
+ if(nread != 16) return YAFFS_FAIL;
+ }
+
+
+ return YAFFS_OK;
+
+}
+
+
+int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
+{
+
+ int i;
+
+ CheckInit(dev);
+
+ if(blockNumber < 0 || blockNumber >= filedisk.nBlocks)
+ {
+ T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber));
+ return YAFFS_FAIL;
+ }
+ else
+ {
+
+ yflash_Page pg;
+
+ memset(&pg,0xff,sizeof(yflash_Page));
+
+ lseek(filedisk.handle, blockNumber * 32 * 528, SEEK_SET);
+
+ for(i = 0; i < 32; i++)
+ {
+ write(filedisk.handle,&pg,528);
+ }
+ return YAFFS_OK;
+ }
+
+}
+
+int yflash_InitialiseNAND(yaffs_Device *dev)
+{
+ dev->useNANDECC = 1; // force on useNANDECC which gets faked.
+ // This saves us doing ECC checks.
+
+ return YAFFS_OK;
+}
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_ramdisk.c: yaffs ram disk component
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+// This provides a rma disk under yaffs.
+// NB this is not intended for NAND emulation.
+// Use this with dev->useNANDECC enabled, then ECC overheads are not required.
+
+const char *yaffs_flashif_c_version = "$Id: yaffs_flashif.c,v 1.1 2003-01-21 03:32:17 charles Exp $";
+
+
+#include "yportenv.h"
+
+#include "yaffs_flashif.h"
+#include "yaffs_guts.h"
+#include "devextras.h"
+
+
+#define SIZE_IN_MB 16
+
+#define BLOCK_SIZE (32 * 528)
+#define BLOCKS_PER_MEG ((1024*1024)/(32 * 512))
+
+
+
+typedef struct
+{
+ __u8 data[528]; // Data + spare
+} yflash_Page;
+
+typedef struct
+{
+ yflash_Page page[32]; // The pages in the block
+
+} yflash_Block;
+
+
+
+typedef struct
+{
+ yflash_Block **block;
+ int nBlocks;
+} yflash_Device;
+
+static yflash_Device ramdisk;
+
+static int CheckInit(yaffs_Device *dev)
+{
+ static int initialised = 0;
+
+ int i;
+ int fail = 0;
+ int nAllocated = 0;
+
+ if(initialised)
+ {
+ return YAFFS_OK;
+ }
+
+ initialised = 1;
+
+
+ ramdisk.nBlocks = (SIZE_IN_MB * 1024 * 1024)/(16 * 1024);
+
+ ramdisk.block = YMALLOC(sizeof(yflash_Block *) * ramdisk.nBlocks);
+
+ if(!ramdisk.block) return 0;
+
+ for(i=0; i <ramdisk.nBlocks; i++)
+ {
+ ramdisk.block[i] = NULL;
+ }
+
+ for(i=0; i <ramdisk.nBlocks && !fail; i++)
+ {
+ if((ramdisk.block[i] = YMALLOC(sizeof(yflash_Block))) == 0)
+ {
+ fail = 1;
+ }
+ else
+ {
+ yflash_EraseBlockInNAND(dev,i);
+ nAllocated++;
+ }
+ }
+
+ if(fail)
+ {
+ for(i = 0; i < nAllocated; i++)
+ {
+ YFREE(ramdisk.block[i]);
+ }
+ YFREE(ramdisk.block);
+
+ T(YAFFS_TRACE_ALWAYS,("Allocation failed, could only allocate %dMB of %dMB requested.\n",
+ nAllocated/64,ramdisk.nBlocks * YAFFS_BYTES_PER_BLOCK));
+ return 0;
+ }
+
+
+
+ return 1;
+}
+
+int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
+{
+ int blk;
+ int pg;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ if(data)
+ {
+ memcpy(ramdisk.block[blk]->page[pg].data,data,512);
+ }
+
+
+ if(spare)
+ {
+ memcpy(&ramdisk.block[blk]->page[pg].data[512],spare,16);
+ }
+
+ return YAFFS_OK;
+
+}
+
+
+int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
+{
+ int blk;
+ int pg;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ if(data)
+ {
+ memcpy(data,ramdisk.block[blk]->page[pg].data,512);
+ }
+
+
+ if(spare)
+ {
+ memcpy(spare,&ramdisk.block[blk]->page[pg].data[512],16);
+ if(dev->useNANDECC)
+ {
+ struct yaffs_NANDSpare *nsp = (struct yaffs_NANDSpare *)spare;
+ nsp->eccres1 = 0;
+ nsp->eccres2 = 0;
+ }
+ }
+
+ return YAFFS_OK;
+}
+
+
+int yflash_CheckChunkErased(yaffs_Device *dev,int chunkInNAND)
+{
+ int blk;
+ int pg;
+ int i;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ for(i = 0; i < 528; i++)
+ {
+ if(ramdisk.block[blk]->page[pg].data[i] != 0xFF)
+ {
+ return YAFFS_FAIL;
+ }
+ }
+
+ return YAFFS_OK;
+
+}
+
+int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
+{
+
+ CheckInit(dev);
+
+ if(blockNumber < 0 || blockNumber >= ramdisk.nBlocks)
+ {
+ T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber));
+ return YAFFS_FAIL;
+ }
+ else
+ {
+ memset(ramdisk.block[blockNumber],0xFF,sizeof(yflash_Block));
+ return YAFFS_OK;
+ }
+
+}
+
+int yflash_InitialiseNAND(yaffs_Device *dev)
+{
+ dev->useNANDECC = 1; // force on useNANDECC which gets faked.
+ // This saves us doing ECC checks.
+
+ return YAFFS_OK;
+}
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_ramdisk.h: yaffs ram disk component
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * $Id: yaffs_flashif.h,v 1.1 2003-01-21 03:32:17 charles Exp $
+ */
+
+// This provides a rma disk under yaffs.
+// NB this is not intended for NAND emulation.
+// Use this with dev->useNANDECC enabled, then ECC overheads are not required.
+
+#ifndef __YAFFS_FLASH_H__
+#define __YAFFS_FLASH_H__
+
+
+#include "yaffs_guts.h"
+int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+int yflash_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare);
+int yflash_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare);
+int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+int yflash_InitialiseNAND(yaffs_Device *dev);
+
+#endif
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_ramdisk.c: yaffs ram disk component
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+// This provides a rma disk under yaffs.
+// NB this is not intended for NAND emulation.
+// Use this with dev->useNANDECC enabled, then ECC overheads are not required.
+
+const char *yaffs_ramdisk_c_version = "$Id: yaffs_ramdisk.c,v 1.1 2003-01-21 03:32:17 charles Exp $";
+
+
+#include "yportenv.h"
+
+#include "yaffs_ramdisk.h"
+#include "yaffs_guts.h"
+#include "devextras.h"
+
+
+#define SIZE_IN_MB 2
+
+#define BLOCK_SIZE (32 * 528)
+#define BLOCKS_PER_MEG ((1024*1024)/(32 * 512))
+
+
+
+typedef struct
+{
+ __u8 data[528]; // Data + spare
+} yramdisk_Page;
+
+typedef struct
+{
+ yramdisk_Page page[32]; // The pages in the block
+
+} yramdisk_Block;
+
+
+
+typedef struct
+{
+ yramdisk_Block **block;
+ int nBlocks;
+} yramdisk_Device;
+
+static yramdisk_Device ramdisk;
+
+static int CheckInit(yaffs_Device *dev)
+{
+ static int initialised = 0;
+
+ int i;
+ int fail = 0;
+ //int nBlocks;
+ int nAllocated = 0;
+
+ if(initialised)
+ {
+ return YAFFS_OK;
+ }
+
+ initialised = 1;
+
+
+ ramdisk.nBlocks = (SIZE_IN_MB * 1024 * 1024)/(16 * 1024);
+
+ ramdisk.block = YMALLOC(sizeof(yramdisk_Block *) * ramdisk.nBlocks);
+
+ if(!ramdisk.block) return 0;
+
+ for(i=0; i <ramdisk.nBlocks; i++)
+ {
+ ramdisk.block[i] = NULL;
+ }
+
+ for(i=0; i <ramdisk.nBlocks && !fail; i++)
+ {
+ if((ramdisk.block[i] = YMALLOC(sizeof(yramdisk_Block))) == 0)
+ {
+ fail = 1;
+ }
+ else
+ {
+ yramdisk_EraseBlockInNAND(dev,i);
+ nAllocated++;
+ }
+ }
+
+ if(fail)
+ {
+ for(i = 0; i < nAllocated; i++)
+ {
+ YFREE(ramdisk.block[i]);
+ }
+ YFREE(ramdisk.block);
+
+ T(YAFFS_TRACE_ALWAYS,("Allocation failed, could only allocate %dMB of %dMB requested.\n",
+ nAllocated/64,ramdisk.nBlocks * YAFFS_BYTES_PER_BLOCK));
+ return 0;
+ }
+
+
+ return 1;
+}
+
+int yramdisk_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
+{
+ int blk;
+ int pg;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ if(data)
+ {
+ memcpy(ramdisk.block[blk]->page[pg].data,data,512);
+ }
+
+
+ if(spare)
+ {
+ memcpy(&ramdisk.block[blk]->page[pg].data[512],spare,16);
+ }
+
+ return YAFFS_OK;
+
+}
+
+
+int yramdisk_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare)
+{
+ int blk;
+ int pg;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ if(data)
+ {
+ memcpy(data,ramdisk.block[blk]->page[pg].data,512);
+ }
+
+
+ if(spare)
+ {
+ memcpy(spare,&ramdisk.block[blk]->page[pg].data[512],16);
+ if(dev->useNANDECC)
+ {
+ struct yaffs_NANDSpare *nsp = (struct yaffs_NANDSpare *)spare;
+ nsp->eccres1 = 0;
+ nsp->eccres2 = 0;
+ }
+ }
+
+ return YAFFS_OK;
+}
+
+
+int yramdisk_CheckChunkErased(yaffs_Device *dev,int chunkInNAND)
+{
+ int blk;
+ int pg;
+ int i;
+
+
+ CheckInit(dev);
+
+ blk = chunkInNAND/32;
+ pg = chunkInNAND%32;
+
+
+ for(i = 0; i < 528; i++)
+ {
+ if(ramdisk.block[blk]->page[pg].data[i] != 0xFF)
+ {
+ return YAFFS_FAIL;
+ }
+ }
+
+ return YAFFS_OK;
+
+}
+
+int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
+{
+
+ CheckInit(dev);
+
+ if(blockNumber < 0 || blockNumber >= ramdisk.nBlocks)
+ {
+ T(YAFFS_TRACE_ALWAYS,("Attempt to erase non-existant block %d\n",blockNumber));
+ return YAFFS_FAIL;
+ }
+ else
+ {
+ memset(ramdisk.block[blockNumber],0xFF,sizeof(yramdisk_Block));
+ return YAFFS_OK;
+ }
+
+}
+
+int yramdisk_InitialiseNAND(yaffs_Device *dev)
+{
+ dev->useNANDECC = 1; // force on useNANDECC which gets faked.
+ // This saves us doing ECC checks.
+
+ return YAFFS_OK;
+}
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_ramdisk.h: yaffs ram disk component
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * $Id: yaffs_ramdisk.h,v 1.1 2003-01-21 03:32:17 charles Exp $
+ */
+
+// This provides a rma disk under yaffs.
+// NB this is not intended for NAND emulation.
+// Use this with dev->useNANDECC enabled, then ECC overheads are not required.
+
+#ifndef __YAFFS_RAMDISK_H__
+#define __YAFFS_RAMDISK_H__
+
+
+#include "yaffs_guts.h"
+int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+int yramdisk_WriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare);
+int yramdisk_ReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_Spare *spare);
+int yramdisk_EraseBlockInNAND(yaffs_Device *dev, int blockNumber);
+int yramdisk_InitialiseNAND(yaffs_Device *dev);
+
+#endif
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffscfg.c The configuration for the "direct" use of yaffs.
+ *
+ * This file is intended to be modified to your requirements.
+ * There is no need to redistribute this file.
+ */
+
+#include "yaffscfg.h"
+#include "yaffsfs.h"
+#include <errno.h>
+
+unsigned yaffs_traceMask = 0xFFFFFFFF;
+
+
+void yaffsfs_SetError(int err)
+{
+ //Do whatever to set error
+ errno = err;
+}
+
+void yaffsfs_Lock(void)
+{
+}
+
+void yaffsfs_Unlock(void)
+{
+}
+
+__u32 yaffsfs_CurrentTime(void)
+{
+ return 0;
+}
+
+void yaffsfs_LocalInitialisation(void)
+{
+ // Define locking semaphore.
+}
+
+// Configuration for:
+// /ram 2MB ramdisk
+// /boot 2MB boot disk (flash)
+// /flash 14MB flash disk (flash)
+// NB Though /boot and /flash occupy the same physical device they
+// are still disticnt "yaffs_Devices. You may think of these as "partitions"
+// using non-overlapping areas in the same device.
+//
+
+#include "yaffs_ramdisk.h"
+#include "yaffs_flashif.h"
+
+static yaffs_Device ramDev;
+static yaffs_Device bootDev;
+static yaffs_Device flashDev;
+
+static yaffsfs_DeviceConfiguration yaffsfs_config[] = {
+
+ { "/ram", &ramDev},
+ { "/boot", &bootDev},
+ { "/flash", &flashDev},
+ {(void *)0,(void *)0}
+};
+
+
+int yaffs_StartUp(void)
+{
+ // Stuff to configure YAFFS
+ // Stuff to initialise anything special (eg lock semaphore).
+ yaffsfs_LocalInitialisation();
+
+ // Set up devices
+
+ // /ram
+ ramDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ ramDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ ramDev.startBlock = 1; // Can't use block 0
+ ramDev.endBlock = 127; // Last block in 2MB.
+ ramDev.useNANDECC = 1;
+ ramDev.nShortOpCaches = 0; // Disable caching on this device.
+ ramDev.genericDevice = (void *) 0; // Used to identify the device in fstat.
+ ramDev.writeChunkToNAND = yramdisk_WriteChunkToNAND;
+ ramDev.readChunkFromNAND = yramdisk_ReadChunkFromNAND;
+ ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
+ ramDev.initialiseNAND = yramdisk_InitialiseNAND;
+
+ // /boot
+ bootDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ bootDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ bootDev.startBlock = 1; // Can't use block 0
+ bootDev.endBlock = 127; // Last block in 2MB.
+ bootDev.useNANDECC = 0; // use YAFFS's ECC
+ bootDev.nShortOpCaches = 10; // Use caches
+ bootDev.genericDevice = (void *) 1; // Used to identify the device in fstat.
+ bootDev.writeChunkToNAND = yflash_WriteChunkToNAND;
+ bootDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
+ bootDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
+ bootDev.initialiseNAND = yflash_InitialiseNAND;
+
+ // /flash
+ flashDev.nBytesPerChunk = YAFFS_BYTES_PER_CHUNK;
+ flashDev.nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK;
+ flashDev.startBlock = 128; // First block after 2MB
+ flashDev.endBlock = 1023; // Last block in 16MB
+ flashDev.useNANDECC = 0; // use YAFFS's ECC
+ flashDev.nShortOpCaches = 10; // Use caches
+ flashDev.genericDevice = (void *) 2; // Used to identify the device in fstat.
+ flashDev.writeChunkToNAND = yflash_WriteChunkToNAND;
+ flashDev.readChunkFromNAND = yflash_ReadChunkFromNAND;
+ flashDev.eraseBlockInNAND = yflash_EraseBlockInNAND;
+ flashDev.initialiseNAND = yflash_InitialiseNAND;
+
+ yaffs_initialise(yaffsfs_config);
+
+ return 0;
+}
+
+
+
+
--- /dev/null
+/*
+* Header file for using yaffs in an application via
+* a direct interface.
+*/
+
+
+#ifndef __YAFFSCFG_H__
+#define __YAFFSCFG_H__
+
+
+
+#include "yaffs_guts.h"
+
+#define YAFFSFS_N_HANDLES 200
+
+
+typedef struct {
+ const char *prefix;
+ yaffs_Device *dev;
+} yaffsfs_DeviceConfiguration;
+
+
+void yaffsfs_Lock(void);
+void yaffsfs_Unlock(void);
+
+__u32 yaffsfs_CurrentTime(void);
+
+void yaffsfs_SetError(int err);
+
+#endif
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffsfs.c The interface functions for using YAFFS via a "direct" interface.
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include "yaffsfs.h"
+#include "yaffs_guts.h"
+#include "yaffscfg.h"
+#include <string.h> // for memset
+#include "yportenv.h"
+
+#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+
+const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.1 2003-01-21 03:32:17 charles Exp $";
+
+// configurationList is the list of devices that are supported
+static yaffsfs_DeviceConfiguration *yaffsfs_configurationList;
+
+
+//
+// Directory search context
+//
+// NB this is an opaque structure.
+
+struct yaffsfs_ObjectListEntry
+{
+ int objectId;
+ struct yaffsfs_ObjectListEntry *next;
+};
+
+
+typedef struct
+{
+ __u32 magic;
+ yaffs_dirent de;
+ struct yaffsfs_ObjectListEntry *list;
+ char name[NAME_MAX+1];
+
+} yaffsfs_DirectorySearchContext;
+
+
+// Handle management.
+//
+
+typedef struct
+{
+ __u8 inUse:1; // this handle is in use
+ __u8 readOnly:1; // this handle is read only
+ __u8 append:1; // append only
+ __u8 exclusive:1; // exclusive
+ __u32 position; // current position in file
+ yaffs_Object *obj; // the object
+}yaffsfs_Handle;
+
+
+static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth);
+
+
+
+static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
+
+// yaffsfs_InitHandle
+/// Inilitalise handles on start-up.
+//
+static int yaffsfs_InitHandles(void)
+{
+ int i;
+ for(i = 0; i < YAFFSFS_N_HANDLES; i++)
+ {
+ yaffsfs_handle[i].inUse = 0;
+ yaffsfs_handle[i].obj = NULL;
+ }
+ return 0;
+}
+
+yaffsfs_Handle *yaffsfs_GetHandlePointer(int h)
+{
+ if(h < 0 || h >= YAFFSFS_N_HANDLES)
+ {
+ return NULL;
+ }
+
+ return &yaffsfs_handle[h];
+}
+
+yaffs_Object *yaffsfs_GetHandleObject(int handle)
+{
+ yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
+
+ if(h && h->inUse)
+ {
+ return h->obj;
+ }
+
+ return NULL;
+}
+
+
+//yaffsfs_GetHandle
+// Grab a handle (when opening a file)
+//
+
+static int yaffsfs_GetHandle(void)
+{
+ int i;
+ yaffsfs_Handle *h;
+
+ for(i = 0; i < YAFFSFS_N_HANDLES; i++)
+ {
+ h = yaffsfs_GetHandlePointer(i);
+ if(!h)
+ {
+ // todo bug: should never happen
+ }
+ if(!h->inUse)
+ {
+ memset(h,0,sizeof(yaffsfs_Handle));
+ h->inUse=1;
+ return i;
+ }
+ }
+ return -1;
+}
+
+// yaffs_PutHandle
+// Let go of a handle (when closing a file)
+//
+static int yaffsfs_PutHandle(int handle)
+{
+ yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
+
+ if(h)
+ {
+ h->inUse = 0;
+ h->obj = NULL;
+ }
+ return 0;
+}
+
+
+
+// Stuff to search for a directory from a path
+
+
+int yaffsfs_Match(char a, char b)
+{
+ // case sensitive
+ return (a == b);
+}
+
+// yaffsfs_FindDevice
+// yaffsfs_FindRoot
+// Scan the configuration list to find the root.
+static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath)
+{
+ yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList;
+ const char *leftOver;
+ const char *p;
+
+ while(cfg && cfg->prefix && cfg->dev)
+ {
+ leftOver = path;
+ p = cfg->prefix;
+ while(*p && *leftOver && yaffsfs_Match(*p,*leftOver))
+ {
+ p++;
+ leftOver++;
+ }
+ if(!*p)
+ {
+ // Matched prefix
+ *restOfPath = (char *)leftOver;
+ return cfg->dev;
+ }
+ cfg++;
+ }
+ return NULL;
+}
+
+static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath)
+{
+
+ yaffs_Device *dev;
+
+ dev= yaffsfs_FindDevice(path,restOfPath);
+ if(dev && dev->isMounted)
+ {
+ return dev->rootDir;
+ }
+ return NULL;
+}
+
+static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth)
+{
+
+ while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+ {
+ char *alias = obj->variant.symLinkVariant.alias;
+
+ if(*alias == '/')
+ {
+ // Starts with a /, need to scan from root up
+ obj = yaffsfs_FindObject(NULL,alias,symDepth++);
+ }
+ else
+ {
+ // Relative to here, so use the parent of the symlink as a start
+ obj = yaffsfs_FindObject(obj->parent,alias,symDepth++);
+ }
+ }
+ return obj;
+}
+
+
+// yaffsfs_FindDirectory
+// Parse a path to determine the directory and the name within the directory.
+//
+// eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
+static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth)
+{
+ yaffs_Object *dir;
+ char *restOfPath;
+ char str[YAFFS_MAX_NAME_LENGTH+1];
+ int i;
+
+ if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES)
+ {
+ return NULL;
+ }
+
+ if(startDir)
+ {
+ dir = startDir;
+ restOfPath = (char *)path;
+ }
+ else
+ {
+ dir = yaffsfs_FindRoot(path,&restOfPath);
+ }
+
+ while(dir)
+ {
+ // parse off /.
+ // curve ball: also throw away surplus '/'
+ // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
+ while(*restOfPath == '/')
+ {
+ restOfPath++; // get rid of '/'
+ }
+
+ *name = restOfPath;
+ i = 0;
+
+ while(*restOfPath && *restOfPath != '/')
+ {
+ if (i < YAFFS_MAX_NAME_LENGTH)
+ {
+ str[i] = *restOfPath;
+ str[i+1] = '\0';
+ i++;
+ }
+ restOfPath++;
+ }
+
+ if(!*restOfPath)
+ {
+ // got to the end of the string
+ return dir;
+ }
+ else
+ {
+ if(strcmp(str,".") == 0)
+ {
+ // Do nothing
+ }
+ else if(strcmp(str,"..") == 0)
+ {
+ dir = dir->parent;
+ }
+ else
+ {
+ dir = yaffs_FindObjectByName(dir,str);
+
+ while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+ {
+
+ dir = yaffsfs_FollowLink(dir,symDepth);
+
+ }
+
+ if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+ dir = NULL;
+ }
+ }
+ }
+ }
+ // directory did not exist.
+ return NULL;
+}
+
+static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth)
+{
+ return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth);
+}
+
+// yaffsfs_FindObject turns a path for an existing object into the object
+//
+static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth)
+{
+ yaffs_Object *dir;
+ char *name;
+
+ dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth);
+
+ if(dir && *name)
+ {
+ return yaffs_FindObjectByName(dir,name);
+ }
+
+ return dir;
+}
+
+
+
+int yaffs_open(const char *path, int oflag, int mode)
+{
+ yaffs_Object *obj = NULL;
+ yaffs_Object *dir = NULL;
+ char *name;
+ int handle = -1;
+ yaffsfs_Handle *h = NULL;
+ int alreadyOpen = 0;
+ int alreadyExclusive = 0;
+ int openDenied = 0;
+ int symDepth = 0;
+
+ int i;
+
+
+ // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR
+
+
+ yaffsfs_Lock();
+
+ handle = yaffsfs_GetHandle();
+
+ if(handle >= 0)
+ {
+
+ h = yaffsfs_GetHandlePointer(handle);
+
+
+ // try to find the exisiting object
+ obj = yaffsfs_FindObject(NULL,path,0);
+
+ if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+ {
+
+ obj = yaffsfs_FollowLink(obj,symDepth++);
+ }
+
+ if(obj)
+ {
+ // Check if the object is already in use
+ alreadyOpen = alreadyExclusive = 0;
+
+ for(i = 0; i <= YAFFSFS_N_HANDLES; i++)
+ {
+
+ if(i != handle &&
+ yaffsfs_handle[i].inUse &&
+ obj == yaffsfs_handle[i].obj)
+ {
+ alreadyOpen = 1;
+ if(yaffsfs_handle[i].exclusive)
+ {
+ alreadyExclusive = 1;
+ }
+ }
+ }
+
+ if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive)
+ {
+ openDenied = 1;
+ }
+
+ // Check file permissions
+ if( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY
+ !(obj->st_mode & S_IREAD))
+ {
+ openDenied = 1;
+ }
+
+ if( (oflag & O_RDWR) &&
+ !(obj->st_mode & S_IREAD))
+ {
+ openDenied = 1;
+ }
+
+ if( (oflag & (O_RDWR | O_WRONLY)) &&
+ !(obj->st_mode & S_IWRITE))
+ {
+ openDenied = 1;
+ }
+
+ }
+
+ else if((oflag & O_CREAT))
+ {
+ // Let's see if we can create this file
+ dir = yaffsfs_FindDirectory(NULL,path,&name,0);
+ obj = yaffs_MknodFile(dir,name,mode,0,0);
+ }
+
+ if(obj && !openDenied)
+ {
+ h->obj = obj;
+ h->inUse = 1;
+ h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1;
+ h->append = (oflag & O_APPEND) ? 1 : 0;
+ h->exclusive = (oflag & O_EXCL) ? 1 : 0;
+ h->position = 0;
+
+ obj->inUse++;
+ if((oflag & O_TRUNC) && !h->readOnly)
+ {
+ //todo truncate
+ yaffs_ResizeFile(obj,0);
+ }
+
+ }
+ else
+ {
+ yaffsfs_PutHandle(handle);
+ yaffsfs_SetError(-EACCESS);
+ handle = -1;
+ }
+
+ }
+
+ yaffsfs_Unlock();
+
+ return handle;
+}
+
+int yaffs_close(int fd)
+{
+ yaffsfs_Handle *h = NULL;
+ int retVal = 0;
+
+ yaffsfs_Lock();
+
+ h = yaffsfs_GetHandlePointer(fd);
+
+ if(h && h->inUse)
+ {
+ // clean up
+ yaffs_FlushFile(h->obj,1);
+ h->obj->inUse--;
+ if(h->obj->inUse <= 0 && h->obj->unlinked)
+ {
+ yaffs_DeleteFile(h->obj);
+ }
+ yaffsfs_PutHandle(fd);
+ retVal = 0;
+ }
+ else
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ retVal = -1;
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+}
+
+int yaffs_read(int fd, void *buf, unsigned int nbyte)
+{
+ yaffsfs_Handle *h = NULL;
+ yaffs_Object *obj = NULL;
+ int pos = 0;
+ int nRead = -1;
+ int maxRead;
+
+ yaffsfs_Lock();
+ h = yaffsfs_GetHandlePointer(fd);
+ obj = yaffsfs_GetHandleObject(fd);
+
+ if(!h || !obj)
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+ else if( h && obj)
+ {
+ pos= h->position;
+ if(yaffs_GetObjectFileLength(obj) > pos)
+ {
+ maxRead = yaffs_GetObjectFileLength(obj) - pos;
+ }
+ else
+ {
+ maxRead = 0;
+ }
+
+ if(nbyte > maxRead)
+ {
+ nbyte = maxRead;
+ }
+
+
+ if(nbyte > 0)
+ {
+ nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte);
+ if(nRead >= 0)
+ {
+ h->position = pos + nRead;
+ }
+ else
+ {
+ //todo error
+ }
+ }
+ else
+ {
+ //todo error
+ }
+
+ }
+
+ yaffsfs_Unlock();
+
+
+ return (nRead >= 0) ? nRead : -1;
+
+}
+
+int yaffs_write(int fd, const void *buf, unsigned int nbyte)
+{
+ yaffsfs_Handle *h = NULL;
+ yaffs_Object *obj = NULL;
+ int pos = 0;
+ int nWritten = -1;
+
+ yaffsfs_Lock();
+ h = yaffsfs_GetHandlePointer(fd);
+ obj = yaffsfs_GetHandleObject(fd);
+
+ if(!h || !obj)
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+ else if( h && obj && h->readOnly)
+ {
+ // todo error
+ }
+ else if( h && obj)
+ {
+ if(h->append)
+ {
+ pos = yaffs_GetObjectFileLength(obj);
+ }
+ else
+ {
+ pos = h->position;
+ }
+
+ nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte);
+
+ if(nWritten >= 0)
+ {
+ h->position = pos + nWritten;
+ }
+ else
+ {
+ //todo error
+ }
+
+ }
+
+ yaffsfs_Unlock();
+
+
+ return (nWritten >= 0) ? nWritten : -1;
+
+}
+
+off_t yaffs_lseek(int fd, off_t offset, int whence)
+{
+ yaffsfs_Handle *h = NULL;
+ yaffs_Object *obj = NULL;
+ int pos = -1;
+ int fSize = -1;
+
+ yaffsfs_Lock();
+ h = yaffsfs_GetHandlePointer(fd);
+ obj = yaffsfs_GetHandleObject(fd);
+
+ if(!h || !obj)
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+ else if(whence == SEEK_SET)
+ {
+ if(offset >= 0)
+ {
+ pos = offset;
+ }
+ }
+ else if(whence == SEEK_CUR)
+ {
+ if( (h->position + offset) >= 0)
+ {
+ pos = (h->position + offset);
+ }
+ }
+ else if(whence == SEEK_END)
+ {
+ fSize = yaffs_GetObjectFileLength(obj);
+ if(fSize >= 0 && (fSize + offset) >= 0)
+ {
+ pos = fSize + offset;
+ }
+ }
+
+ if(pos >= 0)
+ {
+ h->position = pos;
+ }
+ else
+ {
+ // todo error
+ }
+
+
+ yaffsfs_Unlock();
+
+ return pos;
+}
+
+
+int yaffsfs_DoUnlink(const char *path,int isDirectory)
+{
+ yaffs_Object *dir = NULL;
+ yaffs_Object *obj = NULL;
+ char *name;
+ int result = YAFFS_FAIL;
+
+ yaffsfs_Lock();
+
+ obj = yaffsfs_FindObject(NULL,path,0);
+ dir = yaffsfs_FindDirectory(NULL,path,&name,0);
+ if(!dir)
+ {
+ yaffsfs_SetError(-ENOTDIR);
+ }
+ else if(!obj)
+ {
+ yaffsfs_SetError(-ENOENT);
+ }
+ else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+ yaffsfs_SetError(-EISDIR);
+ }
+ else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+ yaffsfs_SetError(-ENOTDIR);
+ }
+ else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+ yaffsfs_SetError(-ENOTDIR);
+ }
+ else
+ {
+ result = yaffs_Unlink(dir,name);
+
+ if(result == YAFFS_FAIL && isDirectory)
+ {
+ yaffsfs_SetError(-ENOTEMPTY);
+ }
+ }
+
+ yaffsfs_Unlock();
+
+ // todo error
+
+ return (result == YAFFS_FAIL) ? -1 : 0;
+}
+int yaffs_rmdir(const char *path)
+{
+ return yaffsfs_DoUnlink(path,1);
+}
+
+int yaffs_unlink(const char *path)
+{
+ return yaffsfs_DoUnlink(path,0);
+}
+
+int yaffs_rename(const char *oldPath, const char *newPath)
+{
+ yaffs_Object *olddir = NULL;
+ yaffs_Object *newdir = NULL;
+ char *oldname;
+ char *newname;
+ int result= YAFFS_FAIL;
+
+ yaffsfs_Lock();
+
+ olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0);
+ newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0);
+
+ if(!olddir || !newdir)
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+ else if(olddir->myDev != newdir->myDev)
+ {
+ // oops must be on same device
+ // todo error
+ yaffsfs_SetError(-EXDEV);
+ }
+ else
+ {
+ result = yaffs_RenameObject(olddir,oldname,newdir,newname);
+ }
+
+ yaffsfs_Unlock();
+
+ return (result == YAFFS_FAIL) ? -1 : 0;
+}
+
+
+static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf)
+{
+ int retVal = -1;
+
+ if(obj)
+ {
+ obj = yaffs_GetEquivalentObject(obj);
+ }
+
+ if(obj && buf)
+ {
+ buf->st_dev = (int)obj->myDev->genericDevice;
+ buf->st_ino = obj->objectId;
+ buf->st_mode = obj->st_mode & ~S_IFMT; // clear out file type bits
+
+ if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+ buf->st_mode |= S_IFDIR;
+ }
+ else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
+ {
+ buf->st_mode |= S_IFLNK;
+ }
+ else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
+ {
+ buf->st_mode |= S_IFREG;
+ }
+
+ buf->st_nlink = yaffs_GetObjectLinkCount(obj);
+ buf->st_uid = 0;
+ buf->st_gid = 0;;
+ buf->st_rdev = obj->st_rdev;
+ buf->st_size = yaffs_GetObjectFileLength(obj);
+ buf->st_blksize = YAFFS_BYTES_PER_CHUNK;
+ buf->st_blocks = (buf->st_size + YAFFS_BYTES_PER_CHUNK -1)/YAFFS_BYTES_PER_CHUNK;
+ buf->st_atime = obj->st_atime;
+ buf->st_ctime = obj->st_ctime;
+ buf->st_mtime = obj->st_mtime;
+ retVal = 0;
+ }
+ return retVal;
+}
+
+static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat)
+{
+ yaffs_Object *obj;
+
+ int retVal = -1;
+
+ yaffsfs_Lock();
+ obj = yaffsfs_FindObject(NULL,path,0);
+
+ if(!doLStat && obj)
+ {
+ obj = yaffsfs_FollowLink(obj,0);
+ }
+
+ if(obj)
+ {
+ retVal = yaffsfs_DoStat(obj,buf);
+ }
+ else
+ {
+ // todo error not found
+ yaffsfs_SetError(-ENOENT);
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+
+}
+
+int yaffs_stat(const char *path, struct yaffs_stat *buf)
+{
+ return yaffsfs_DoStatOrLStat(path,buf,0);
+}
+
+int yaffs_lstat(const char *path, struct yaffs_stat *buf)
+{
+ return yaffsfs_DoStatOrLStat(path,buf,1);
+}
+
+int yaffs_fstat(int fd, struct yaffs_stat *buf)
+{
+ yaffs_Object *obj;
+
+ int retVal = -1;
+
+ yaffsfs_Lock();
+ obj = yaffsfs_GetHandleObject(fd);
+
+ if(obj)
+ {
+ retVal = yaffsfs_DoStat(obj,buf);
+ }
+ else
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+}
+
+static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode)
+{
+ int result;
+
+ if(obj)
+ {
+ obj = yaffs_GetEquivalentObject(obj);
+ }
+
+ if(obj)
+ {
+ obj->st_mode = mode;
+ obj->dirty = 1;
+ result = yaffs_FlushFile(obj,0);
+ }
+
+ return result == YAFFS_OK ? 0 : -1;
+}
+
+
+int yaffs_chmod(const char *path, mode_t mode)
+{
+ yaffs_Object *obj;
+
+ int retVal = -1;
+
+ yaffsfs_Lock();
+ obj = yaffsfs_FindObject(NULL,path,0);
+
+ if(obj)
+ {
+ retVal = yaffsfs_DoChMod(obj,mode);
+ }
+ else
+ {
+ // todo error not found
+ yaffsfs_SetError(-ENOENT);
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+
+}
+
+
+int yaffs_fchmod(int fd, mode_t mode)
+{
+ yaffs_Object *obj;
+
+ int retVal = -1;
+
+ yaffsfs_Lock();
+ obj = yaffsfs_GetHandleObject(fd);
+
+ if(obj)
+ {
+ retVal = yaffsfs_DoChMod(obj,mode);
+ }
+ else
+ {
+ // bad handle
+ yaffsfs_SetError(-EBADF);
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+}
+
+
+int yaffs_mkdir(const char *path, mode_t mode)
+{
+ yaffs_Object *parent = NULL;
+ yaffs_Object *dir;
+ char *name;
+ int retVal= -1;
+
+ yaffsfs_Lock();
+ parent = yaffsfs_FindDirectory(NULL,path,&name,0);
+ dir = yaffs_MknodDirectory(parent,name,mode,0,0);
+ if(dir)
+ {
+ retVal = 0;
+ }
+ else
+ {
+ yaffsfs_SetError(-ENOSPC); // just assume no space for now
+ retVal = -1;
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+}
+
+int yaffs_mount(const char *path)
+{
+ int retVal=-1;
+ int result=YAFFS_FAIL;
+ yaffs_Device *dev=NULL;
+ char *dummy;
+
+ yaffsfs_Lock();
+ dev = yaffsfs_FindDevice(path,&dummy);
+ if(dev)
+ {
+ if(!dev->isMounted)
+ {
+ result = yaffs_GutsInitialise(dev);
+ if(result == YAFFS_FAIL)
+ {
+ // todo error - mount failed
+ yaffsfs_SetError(-ENOMEM);
+ }
+ retVal = result ? 0 : -1;
+
+ }
+ else
+ {
+ //todo error - already mounted.
+ yaffsfs_SetError(-EBUSY);
+ }
+ }
+ else
+ {
+ // todo error - no device
+ yaffsfs_SetError(-ENODEV);
+ }
+ yaffsfs_Unlock();
+ return retVal;
+
+}
+
+int yaffs_unmount(const char *path)
+{
+ int retVal=-1;
+ yaffs_Device *dev=NULL;
+ char *dummy;
+
+ yaffsfs_Lock();
+ dev = yaffsfs_FindDevice(path,&dummy);
+ if(dev)
+ {
+ if(dev->isMounted)
+ {
+ int i;
+ int inUse;
+ for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++)
+ {
+ if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev)
+ {
+ inUse = 1; // the device is in use, can't unmount
+ }
+ }
+
+ if(!inUse)
+ {
+ yaffs_Deinitialise(dev);
+
+ retVal = 0;
+ }
+ else
+ {
+ // todo error can't unmount as files are open
+ yaffsfs_SetError(-EBUSY);
+ }
+
+ }
+ else
+ {
+ //todo error - not mounted.
+ yaffsfs_SetError(-EINVAL);
+
+ }
+ }
+ else
+ {
+ // todo error - no device
+ yaffsfs_SetError(-ENODEV);
+ }
+ yaffsfs_Unlock();
+ return retVal;
+
+}
+
+off_t yaffs_freespace(const char *path)
+{
+ off_t retVal=-1;
+ yaffs_Device *dev=NULL;
+ char *dummy;
+
+ yaffsfs_Lock();
+ dev = yaffsfs_FindDevice(path,&dummy);
+ if(dev)
+ {
+ retVal = yaffs_GetNumberOfFreeChunks(dev);
+ retVal *= YAFFS_BYTES_PER_CHUNK;
+
+ }
+ else
+ {
+ yaffsfs_SetError(-EINVAL);
+ }
+
+ yaffsfs_Unlock();
+ return retVal;
+}
+
+void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList)
+{
+
+ yaffsfs_DeviceConfiguration *cfg;
+
+ yaffsfs_configurationList = cfgList;
+
+ yaffsfs_InitHandles();
+
+ cfg = yaffsfs_configurationList;
+
+ while(cfg && cfg->prefix && cfg->dev)
+ {
+ cfg->dev->isMounted = 0;
+ cfg++;
+ }
+
+
+}
+
+
+//
+// Directory search stuff.
+
+yaffs_DIR *yaffs_opendir(const char *dirname)
+{
+ yaffs_DIR *dir = NULL;
+ yaffs_Object *obj = NULL;
+ yaffsfs_DirectorySearchContext *dsc = NULL;
+
+ yaffsfs_Lock();
+
+ obj = yaffsfs_FindObject(NULL,dirname,0);
+
+ if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+
+ dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));
+ dir = (yaffs_DIR *)dsc;
+ if(dsc)
+ {
+ dsc->magic = YAFFS_MAGIC;
+ dsc->list = NULL;
+ memset(dsc->name,0,NAME_MAX+1);
+ strncpy(dsc->name,dirname,NAME_MAX);
+ }
+
+ }
+
+ yaffsfs_Unlock();
+
+ return dir;
+}
+
+struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp)
+{
+ yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
+ struct yaffs_dirent *retVal = NULL;
+ struct list_head *i;
+ yaffs_Object *entry = NULL;
+ int offset;
+ yaffs_Object *obj = NULL;
+ struct yaffsfs_ObjectListEntry *list = NULL;
+ int inList = 0;
+
+ yaffsfs_Lock();
+
+ offset = -1;
+
+ if(dsc && dsc->magic == YAFFS_MAGIC)
+ {
+ yaffsfs_SetError(0);
+
+ obj = yaffsfs_FindObject(NULL,dsc->name,0);
+
+ if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
+ {
+
+ list_for_each(i,&obj->variant.directoryVariant.children)
+ {
+ offset++;
+ entry = (i) ? list_entry(i, yaffs_Object,siblings) : NULL;
+
+ if(entry)
+ {
+ list = dsc->list;
+ inList = 0;
+ while(list && !inList)
+ {
+ if(list->objectId == entry->objectId)
+ {
+ inList = 1;
+ }
+ list = list->next;
+ }
+
+ if(!inList) goto foundNew;
+ }
+
+ }
+
+ foundNew:
+
+ if(!inList && entry)
+ {
+ //This is the entry we're going to return;
+ struct yaffsfs_ObjectListEntry *le;
+
+ le = YMALLOC(sizeof(struct yaffsfs_ObjectListEntry));
+
+ if(le)
+ {
+ le->next = dsc->list;
+ le->objectId = entry->objectId;
+ dsc->list = le;
+
+ dsc->de.d_ino = yaffs_GetEquivalentObject(entry)->objectId;
+ dsc->de.d_off = offset;
+ yaffs_GetObjectName(entry,dsc->de.d_name,NAME_MAX+1);
+ dsc->de.d_reclen = sizeof(struct yaffs_dirent);
+
+ retVal = &dsc->de;
+ }
+
+ }
+ }
+
+ }
+ else
+ {
+ yaffsfs_SetError(-EBADF);
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+
+}
+
+void yaffsfs_ListClear(yaffsfs_DirectorySearchContext *dsc)
+{
+
+ struct yaffsfs_ObjectListEntry *le;
+
+ if(dsc && dsc->magic == YAFFS_MAGIC)
+ {
+ while(dsc->list)
+ {
+ le = dsc->list;
+ dsc->list = dsc->list->next;
+ YFREE(le);
+ }
+ }
+
+}
+
+void yaffs_rewinddir(yaffs_DIR *dirp)
+{
+ yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
+
+ yaffsfs_Lock();
+ yaffsfs_ListClear(dsc);
+ yaffsfs_Unlock();
+}
+
+
+int yaffs_closedir(yaffs_DIR *dirp)
+{
+ yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
+
+ yaffsfs_Lock();
+ yaffsfs_ListClear(dsc);
+ dsc->magic = 0;
+ YFREE(dsc);
+ yaffsfs_Unlock();
+ return 0;
+}
+
+
+
+int yaffs_symlink(const char *oldpath, const char *newpath)
+{
+ yaffs_Object *parent = NULL;
+ yaffs_Object *obj;
+ char *name;
+ int retVal= -1;
+ int mode = 0; // ignore for now
+
+ yaffsfs_Lock();
+ parent = yaffsfs_FindDirectory(NULL,newpath,&name,0);
+ obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath);
+ if(obj)
+ {
+ retVal = 0;
+ }
+ else
+ {
+ yaffsfs_SetError(-ENOSPC); // just assume no space for now
+ retVal = -1;
+ }
+
+ yaffsfs_Unlock();
+
+ return retVal;
+
+}
+
+int yaffs_readlink(const char *path, char *buf, int bufsiz)
+{
+ yaffs_Object *obj = NULL;
+ int retVal;
+
+
+ yaffsfs_Lock();
+
+ obj = yaffsfs_FindObject(NULL,path,0);
+
+ if(!obj)
+ {
+ yaffsfs_SetError(-ENOENT);
+ retVal = -1;
+ }
+ else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK)
+ {
+ yaffsfs_SetError(-EINVAL);
+ retVal = -1;
+ }
+ else
+ {
+ char *alias = obj->variant.symLinkVariant.alias;
+ memset(buf,0,bufsiz);
+ strncpy(buf,alias,bufsiz - 1);
+ retVal = 0;
+ }
+ yaffsfs_Unlock();
+ return retVal;
+}
+
+int yaffs_link(const char *oldpath, const char *newpath);
+int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev);
+
+int yaffs_DumpDevStruct(const char *path)
+{
+ char *rest;
+
+ yaffs_Object *obj = yaffsfs_FindRoot(path,&rest);
+
+ if(obj)
+ {
+ yaffs_Device *dev = obj->myDev;
+
+ printf("\n"
+ "nPageWrites.......... %d\n"
+ "nPageReads........... %d\n"
+ "nBlockErasures....... %d\n"
+ "nGCCopies............ %d\n"
+ "garbageCollections... %d\n"
+ "passiveGarbageColl'ns %d\n"
+ "\n",
+ dev->nPageWrites,
+ dev->nPageReads,
+ dev->nBlockErasures,
+ dev->nGCCopies,
+ dev->garbageCollections,
+ dev->passiveGarbageCollections
+ );
+ }
+}
+
--- /dev/null
+/*
+* Header file for using yaffs in an application via
+* a direct interface.
+*/
+
+
+#ifndef __YAFFSFS_H__
+#define __YAFFSFS_H__
+
+#include "yaffscfg.h"
+#include "yportenv.h"
+
+
+//typedef long off_t;
+//typedef long dev_t;
+//typedef unsigned long mode_t;
+
+
+#ifndef NAME_MAX
+#define NAME_MAX 256
+#endif
+
+#ifndef O_RDONLY
+#define O_RDONLY 00
+#endif
+
+#ifndef O_WRONLY
+#define O_WRONLY 01
+#endif
+
+#ifndef O_RDWR
+#define O_RDWR 02
+#endif
+
+#ifndef O_CREAT
+#define O_CREAT 0100
+#endif
+
+#ifndef O_EXCL
+#define O_EXCL 0200
+#endif
+
+#ifndef O_TRUNC
+#define O_TRUNC 01000
+#endif
+
+#ifndef O_APPEND
+#define O_APPEND 02000
+#endif
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR 1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END 2
+#endif
+
+#ifndef EBUSY
+#define EBUSY 16
+#endif
+
+#ifndef ENODEV
+#define ENODEV 19
+#endif
+
+#ifndef EINVAL
+#define EINVAL 22
+#endif
+
+#ifndef EBADF
+#define EBADF 9
+#endif
+
+#ifndef EACCESS
+#define EACCESS 13
+#endif
+
+#ifndef EXDEV
+#define EXDEV 18
+#endif
+
+#ifndef ENOENT
+#define ENOENT 2
+#endif
+
+#ifndef ENOSPC
+#define ENOSPC 28
+#endif
+
+#ifndef ENOTEMPTY
+#define ENOTEMPTY 39
+#endif
+
+#ifndef ENOMEM
+#define ENOMEM 12
+#endif
+
+#ifndef ENOTDIR
+#define ENOTDIR 20
+#endif
+
+#ifndef EISDIR
+#define EISDIR 21
+#endif
+
+
+// Mode flags
+
+#ifndef S_IFMT
+#define S_IFMT 0170000
+#endif
+
+#ifndef S_IFLNK
+#define S_IFLNK 0120000
+#endif
+
+#ifndef S_IFDIR
+#define S_IFDIR 0040000
+#endif
+
+#ifndef S_IFREG
+#define S_IFREG 0100000
+#endif
+
+#ifndef S_IREAD
+#define S_READ 0000400
+#endif
+
+#ifndef S_IWRITE
+#define S_IWRITE 0000200
+#endif
+
+
+
+
+struct yaffs_dirent{
+ long d_ino; /* inode number */
+ off_t d_off; /* offset to this dirent */
+ unsigned short d_reclen; /* length of this d_name */
+ char d_name [NAME_MAX+1]; /* file name (null-terminated) */
+};
+
+typedef struct yaffs_dirent yaffs_dirent;
+
+
+typedef struct __opaque yaffs_DIR;
+
+
+struct yaffs_stat{
+ int st_dev; /* device */
+ int st_ino; /* inode */
+ mode_t st_mode; /* protection */
+ int st_nlink; /* number of hard links */
+ int st_uid; /* user ID of owner */
+ int st_gid; /* group ID of owner */
+ unsigned st_rdev; /* device type (if inode device) */
+ off_t st_size; /* total size, in bytes */
+ unsigned long st_blksize; /* blocksize for filesystem I/O */
+ unsigned long st_blocks; /* number of blocks allocated */
+ unsigned long st_atime; /* time of last access */
+ unsigned long st_mtime; /* time of last modification */
+ unsigned long st_ctime; /* time of last change */
+};
+
+int yaffs_open(const char *path, int oflag, int mode) ;
+int yaffs_read(int fd, void *buf, unsigned int nbyte) ;
+int yaffs_write(int fd, const void *buf, unsigned int nbyte) ;
+int yaffs_close(int fd) ;
+off_t yaffs_lseek(int fd, off_t offset, int whence) ;
+
+int yaffs_unlink(const char *path) ;
+int yaffs_rename(const char *oldPath, const char *newPath) ;
+
+int yaffs_stat(const char *path, struct yaffs_stat *buf) ;
+int yaffs_lstat(const char *path, struct yaffs_stat *buf) ;
+int yaffs_fstat(int fd, struct yaffs_stat *buf) ;
+
+int yaffs_chmod(const char *path, mode_t mode);
+int yaffs_fchmod(int fd, mode_t mode);
+
+int yaffs_mkdir(const char *path, mode_t mode) ;
+int yaffs_rmdir(const char *path) ;
+
+yaffs_DIR *yaffs_opendir(const char *dirname) ;
+struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp) ;
+void yaffs_rewinddir(yaffs_DIR *dirp) ;
+int yaffs_closedir(yaffs_DIR *dirp) ;
+
+int yaffs_mount(const char *path) ;
+int yaffs_unmount(const char *path) ;
+
+int yaffs_symlink(const char *oldpath, const char *newpath);
+int yaffs_readlink(const char *path, char *buf, int bufsiz);
+
+int yaffs_link(const char *oldpath, const char *newpath);
+int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev);
+
+off_t yaffs_freespace(const char *path);
+
+void yaffs_initialise(yaffsfs_DeviceConfiguration *configList);
+
+int yaffs_StartUp(void);
+
+#endif
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yboot: A yaffs bootloader.
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <string.h>
+#include <stdio.h>
+#include "yaffs_guts.h"
+
+const char *yboot_c_version="$Id: yboot.c,v 1.1 2003-01-21 03:32:17 charles Exp $";
+
+
+#define MAX_FILE_SIZE 4000000
+#define MAX_CHUNKS (MAX_FILE_SIZE/YAFFS_BYTES_PER_CHUNK + 1)
+
+static int chunkLocations[MAX_CHUNKS];
+
+
+// External functions for ECC on data
+void nand_calculate_ecc (const unsigned char*dat, unsigned char*ecc_code);
+int nand_correct_data (unsigned char*dat, unsigned char*read_ecc, unsigned char*calc_ecc);
+
+static const char yaffs_countBits[256] =
+{
+0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
+1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
+1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+1,2,2,3,2,3,3,4,2,3,3,4,3,4,4,5,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+2,3,3,4,3,4,4,5,3,4,4,5,4,5,5,6,
+3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+3,4,4,5,4,5,5,6,4,5,5,6,5,6,6,7,
+4,5,5,6,5,6,6,7,5,6,6,7,6,7,7,8
+};
+
+
+static void spareToTags(yaffs_Spare *spare, yaffs_Tags *tag)
+{
+ unsigned char *bytes = (char *)tag;
+ bytes[0] = spare->tagByte0;
+ bytes[1] = spare->tagByte1;
+ bytes[2] = spare->tagByte2;
+ bytes[3] = spare->tagByte3;
+ bytes[4] = spare->tagByte4;
+ bytes[5] = spare->tagByte5;
+ bytes[6] = spare->tagByte6;
+ bytes[7] = spare->tagByte7;
+}
+
+
+
+// yboot_ScanForFile finds
+static int yaffsboot_ScanForFile(yaffs_Device *dev, const char *fileName)
+{
+ int pg;
+ int blk;
+ yaffs_ObjectHeader data;
+ yaffs_Spare spare;
+ yaffs_Tags tags;
+
+
+ if (!fileName)
+ {
+ //printf("NULL filename\n");
+ return -1;
+ }
+
+
+
+ //printf("Searching block range %d to %d for %s\n", dev->startBlock, dev->endBlock, fileName);
+
+ for (blk = dev->startBlock; blk < dev->endBlock; blk++)
+ {
+
+ for (pg = 0; pg < YAFFS_CHUNKS_PER_BLOCK; pg++)
+ {
+ dev->readChunkFromNAND(dev, (blk*YAFFS_CHUNKS_PER_BLOCK) + pg, (__u8 *)&data, (yaffs_Spare *)&spare);
+ if (yaffs_countBits[spare.blockStatus] >=7 && // block OK
+ yaffs_countBits[spare.pageStatus] >= 7) // page ok
+ {
+ spareToTags(&spare, &tags);
+
+ if ( tags.chunkId == 0 && // it's a header
+ data.parentObjectId == YAFFS_OBJECTID_ROOT && // it's in the root
+ strcmp(data.name, fileName) == 0 // name matches
+ )
+ {
+ //printf("%s found at chunk %x objectId is %x\n", fileName, blk* YAFFS_PAGES_PER_BLOCK + pg, tag.objectId);
+
+ return tags.objectId;
+ }
+ }
+ }
+ }
+ // Sad day... not found.
+ // printf("%s not found\n",filename);
+ return -1;
+}
+
+
+
+static unsigned char bufferData[YAFFS_BYTES_PER_CHUNK];
+static int bufferPos = 0;
+static int bufferChunk = 0;
+static int bufferInitialised = 0;
+static int bufferLength = 0;
+
+static yaffs_Device *bufferDevice;
+
+static int chunkEnd = -1;
+static int topChunk = -1;
+static int fileSize = -1;
+
+int yaffsboot_InitFile(yaffs_Device *dev, const char *fileName,int *loadedFileSize)
+{
+
+ yaffs_Spare spare;
+ yaffs_Tags tags;
+ int fileObjId;
+ int i;
+
+ int blk;
+ int pg;
+ int missing;
+ int chunksMissing = 0;
+
+ bufferDevice = dev;
+
+ fileObjId = yaffsboot_ScanForFile(dev,fileName);
+
+ if(fileObjId < 0)
+ {
+ return -1;
+ }
+
+
+
+ //printf("Gathering chunks...\n");
+
+ for (i = 0; i < MAX_CHUNKS; i++)
+ {
+ chunkLocations[i] = -1;
+ }
+
+
+ for (blk = dev->startBlock; blk <= dev->endBlock; blk++)
+ {
+ for (pg = 0; pg < YAFFS_CHUNKS_PER_BLOCK; pg++)
+ {
+ dev->readChunkFromNAND(dev, blk * YAFFS_CHUNKS_PER_BLOCK + pg, NULL, &spare);
+ if (yaffs_countBits[spare.blockStatus] >= 7 &&
+ yaffs_countBits[spare.pageStatus] >= 7)
+ {
+ spareToTags(&spare, &tags);
+
+ if (tags.objectId == fileObjId && tags.chunkId > 0)
+ {
+
+ if(tags.chunkId >= MAX_CHUNKS)
+ {
+ printf("Chunk %d out of bounds (max is %d)\n",tags.chunkId, MAX_CHUNKS - 1);
+ return -1;
+ }
+
+ chunkLocations[tags.chunkId] = (blk*32) + pg;
+
+ chunkEnd = (tags.chunkId -1) * YAFFS_BYTES_PER_CHUNK + tags.byteCount;
+
+ if(chunkEnd > fileSize) fileSize = chunkEnd;
+
+ if(tags.chunkId > topChunk) topChunk = tags.chunkId;
+ }
+ }
+ }
+ }
+
+
+ for (missing= 0, i= 1; i<= topChunk; i++)
+ {
+ if (chunkLocations[i] < 0)
+ {
+ //printf("chunk %x missing\n",i);
+ chunksMissing++;
+ }
+ }
+
+ *loadedFileSize = fileSize;
+
+ return fileObjId;
+}
+
+
+
+int yaffsboot_Reinitialise(void)
+{
+ bufferInitialised = 0;
+ return 0;
+}
+
+
+int yaffsboot_ReadByte(unsigned char *bPtr)
+{
+ if(!bufferInitialised)
+ {
+ //printf("Read buffer initialisation\n");
+ bufferInitialised = 1;
+ bufferChunk = 0;
+ bufferLength = 0;
+ bufferPos = -1;
+ }
+
+ if(bufferPos < 0)
+ {
+ bufferChunk++;
+ if(bufferChunk> topChunk)
+ {
+ printf("Chunk %d past end of file\r\n",bufferChunk);
+
+ return -1;
+ }
+
+ if (chunkLocations[bufferChunk] < 0)
+ {
+ printf("No chunk %d, zero page\n",bufferChunk);
+ memset(bufferData,0,YAFFS_BYTES_PER_CHUNK);
+ bufferLength = YAFFS_BYTES_PER_CHUNK;
+ }
+ else
+ {
+ yaffs_Spare localSpare;
+ yaffs_Tags tags;
+ __u8 calcEcc[3];
+
+ bufferDevice->readChunkFromNAND(bufferDevice, chunkLocations[bufferChunk], bufferData, &localSpare);
+
+ spareToTags(&localSpare, &tags);
+
+ if(0 && bufferChunk <topChunk)
+ {
+ bufferLength = YAFFS_BYTES_PER_CHUNK;
+ }
+ else
+ {
+ bufferLength = tags.byteCount;
+ }
+
+ //printf("Read chunk %d, size %d bytes\n",bufferChunk,bufferLength);
+
+ nand_calculate_ecc(bufferData,calcEcc);
+ nand_correct_data (bufferData,localSpare.ecc1, calcEcc);
+ nand_calculate_ecc(&bufferData[256],calcEcc);
+ nand_correct_data (&bufferData[256],localSpare.ecc2, calcEcc);
+ }
+
+ bufferPos = 0;
+
+ if(bufferLength <= bufferPos)
+ {
+ return -1;
+ }
+ }
+
+ *bPtr = bufferData[bufferPos];
+ bufferPos++;
+ if(bufferPos >= bufferLength)
+ {
+ //printf("End of page %d at byte %d\r\n",bufferChunk,bufferLength);
+ bufferPos = -1;
+ }
+ return 0;
+}
+
+
+
+
--- /dev/null
+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yboot.h: Interface to yaffs boot file reading code
+ *
+ * Copyright (C) 2002 Aleph One Ltd.
+ *
+ * Created by Charles Manning <charles@aleph1.co.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 2.1 as
+ * published by the Free Software Foundation.
+ *
+ *
+ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
+ *
+ * $Id: yboot.h,v 1.1 2003-01-21 03:32:17 charles Exp $
+ */
+
+ #ifndef __YBOOT_H__
+#define __YBOOT_H__
+
+int yaffsboot_InitFile(yaffs_Device *dev, const char *fileName, int *loadedFileSize);
+
+int yaffsboot_Reinitialise(void);
+
+int yaffsboot_ReadByte(unsigned char *bPtr);
+#endif
+
projects / yaffs / .git / commitdiff