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[yaffs2.git] / direct / yaffscfg.c

diff --git a/direct/yaffscfg.c b/direct/yaffscfg.c
new file mode 100644 (file)
index 0000000..42c9dd2
--- /dev/null
+++ b/direct/yaffscfg.c
@@ -0,0 +1,122 @@
+/*
+ * 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 = 512;
+       ramDev.nChunksPerBlock = 32;
+       ramDev.nReservedBlocks = 2; // Set this smaller for RAM
+       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.writeChunkWithTagsToNAND = yramdisk_WriteChunkWithTagsToNAND;
+       ramDev.readChunkWithTagsFromNAND = yramdisk_ReadChunkWithTagsFromNAND;
+       ramDev.eraseBlockInNAND = yramdisk_EraseBlockInNAND;
+       ramDev.initialiseNAND = yramdisk_InitialiseNAND;
+
+       // /boot
+       bootDev.nBytesPerChunk = 612;
+       bootDev.nChunksPerBlock = 32;
+       bootDev.nReservedBlocks = 5;
+       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 =  512;
+       flashDev.nChunksPerBlock = 32;
+       flashDev.nReservedBlocks = 5;
+       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;
+}
+
+
+
+