NAND FLASH时序及建立分区表

平台:Redhat9.0 + S3C2440

编译环境: 2.6.18.2 + gcc-3.4.1

 

根据NAND FLASH的datasheet修改kernel对nand flash的访问,

在CPU主机为405M时,tacls,twrph0,twrph1的数值如下:

进入 arch/arm/mach-s3c2410/common-smdk.c

 

static struct s3c2410_platform_nand smdk_nand_info = {
    .tacls        = 15,        //default(for 300M) 20,

    .twrph0        = 45,        //default(for 300M) 60,

    .twrph1        = 15,        //default(for 300M) 20,

    .nr_sets    = ARRAY_SIZE(smdk_nand_sets),
    .sets        = smdk_nand_sets,
};


 

 

在128M的Nand Flash上建立分区表,

进入 arch/arm/mach-s3c2410/common-smdk.c

修改

 

static struct mtd_partition smdk_default_nand_part[] = {

        // U-boot 256K

        [0] = {
                .name = "uboot",
                .offset = 0,
                .size = SZ_256K,
        },
        // Kernel 2M - 256K

        [1] = {
                .name = "kernel",
                .offset = SZ_256K,
                .size = (SZ_2M - SZ_256K),
        },
        // rootfs 16M

        [2] = {
                .name = "rootfs",
                .offset = SZ_2M,
                .size = (16 * SZ_1M),
        },
        // app 16M

        [3] = {
                .name = "app",
                .offset = 18 * SZ_1M,
                .size = 16 * SZ_1M,
        },
        // other (127 - 34)M

        [4] = {
                .name = "other",
                .offset = 34 * SZ_1M,
                .size = (127 - 34) * SZ_1M,
        },
};