Annotation of wikisrc/tutorials/using_the_nand_emulator_and_chfs.mdwn, revision 1.1

1.1     ! riz         1: Emulating a NAND flash device
        !             2: -----------------------------
        !             3: 
        !             4: A quick rundown on how to get started using the NAND flash emulator
        !             5: in the NetBSD kernel:
        !             6: 
        !             7: First, build a kernel with:
        !             8: 
        !             9:        pseudo-device nandemulator
        !            10:        flash* at flashbus?
        !            11:        nand* at nandbus?
        !            12: 
        !            13: I created a new kernel config called "NAND" (on amd64):
        !            14: 
        !            15:        include "arch/amd64/conf/GENERIC"
        !            16:        pseudo-device nandemulator
        !            17:        flash* at flashbus?
        !            18:        nand* at nandbus?
        !            19: 
        !            20: Note that at the present time, all the parameters of the NAND emulator are
        !            21: hardcoded, so to change anything you'll need to edit
        !            22: sys/dev/nand/nandemulator.c .
        !            23: 
        !            24: Build and install the kernel, and boot from it.  You'll notice the following
        !            25: items appear:
        !            26: 
        !            27:        nandemulator0: NAND emulator
        !            28:        nand0 at nandemulator0: ONFI NAND Flash
        !            29:        nand0: vendor: NETBSD, model: NANDEMULATOR
        !            30:        nand0: page size: 2048 bytes, spare size: 64 bytes, block size: 131072 bytes
        !            31:        nand0: LUN size: 256 blocks, LUNs: 1, total storage size: 32 MB
        !            32:        flash0 at nand0: NAND flash partition size 32 MB, offset 0
        !            33:        flash0: erase size 128 KB, page size 2048 bytes, write size 2048 bytes
        !            34: 
        !            35: You can then mount a chfs file system on the emulated flash device.  The
        !            36: file system is created on the first mount:
        !            37: 
        !            38:        # mount_chfs /dev/flash0 /mnt
        !            39:        # ls -l /mnt
        !            40:        # cp /netbsd /mnt
        !            41:        # ls -l /mnt
        !            42:        total 29216
        !            43:        -rwxr-xr-x  1 root  wheel  14958233 Oct 13 16:29 netbsd
        !            44:        # umount /mnt
        !            45:        # mount_chfs /dev/flash0 /mnt
        !            46:        # ls -l /mnt   
        !            47:        total 29216
        !            48:        -rwxr-xr-x  1 root  wheel  14958233 Oct 13 16:29 netbsd
        !            49:        # ls -l /mnt
        !            50:        total 29216
        !            51:        -rwxr-xr-x  1 root  wheel  14958233 Oct 13 16:29 netbsd
        !            52:        # md5 /mnt/netbsd /netbsd
        !            53:        MD5 (/mnt/netbsd) = 79184fe311657261e1744d77206716c8
        !            54:        MD5 (/netbsd) = 79184fe311657261e1744d77206716c8
        !            55:        # umount /mnt
        !            56: 

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