flash大小选择和添加mtd的data分区 -- linux内核

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需要修改位置：

(1)/linux-2.6/arch/mips/rt2880/Kconfig

(2)/linux-2.6/drivers/mtd/maps/ralink-flash.h

(3)/linux-2.6/drivers/mtd/maps/ralink-spi.c

(4)/vendors/Ralink/RT5350/config/4M_32M_config.linux-2.6(make dep 后生成的config.h)

(1)添加menuconfig中选项

choiceprompt "Flash Size"default RT2880_FLASH_4Mconfig T2880_FLASH_2M        bool "2M"config RT2880_FLASH_4M        bool "4M"config RT2880_FLASH_8M        bool "8M"config RT2880_FLASH_16M        bool "16M"config RT2880_FLASH_32M        bool "32M"#select RT2880_FLASH_32Mendchoice#Data分区#注释部分不无效choiceprompt "Flash Data Size"default RT2880_FLASH_DATA_320KBconfig RT2880_FLASH_DATA_0KB        bool "none(0)KB"#config RT2880_FLASH_DATA_64KB#        bool "0x10000(64)KB"#config RT2880_FLASH_DATA_128KB#        bool "0x20000(128)KB"#config RT2880_FLASH_DATA_192KB#        bool "0x30000(192)KB"#config RT2880_FLASH_DATA_256KB#        bool "0x40000(256)KB"config RT2880_FLASH_DATA_320KB        bool "0x50000(320)KB"config RT2880_FLASH_DATA_384KB        bool "0x60000(384)KB"endchoiceconfig MTD_PHYSMAP_DATA_LEN       hex        default 0x0 if RT2880_FLASH_DATA_0KB       default 0x10000 if RT2880_FLASH_DATA_64KB       default 0x20000 if RT2880_FLASH_DATA_128KB       default 0x30000 if RT2880_FLASH_DATA_192KB       default 0x40000 if RT2880_FLASH_DATA_256KB       default 0x50000 if RT2880_FLASH_DATA_320KB       default 0x60000 if RT2880_FLASH_DATA_384KBchoice

(2)添加data分区大小，修改kernel分区大小。

#if defined (CONFIG_RT2880_FLASH_32M)#define MTD_BOOT_PART_SIZE0x40000#defineMTD_CONFIG_PART_SIZE0x20000#defineMTD_FACTORY_PART_SIZE0x20000#define MTD_DATA_PAPT_SIZE  CONFIG_MTD_PHYSMAP_DATA_LEN/**/#else#if defined (RECONFIG_PARTITION_SIZE)#if !defined (MTD_BOOT_PART_SIZE)#error "Please define MTD_BOOT_PART_SIZE"#endif#if !defined (MTD_CONFIG_PART_SIZE)#error "Please define MTD_CONFIG_PART_SIZE"#endif#if !defined (MTD_FACTORY_PART_SIZE)#error "Please define MTD_FACTORY_PART_SIZE"#endif#else#define MTD_BOOT_PART_SIZE0x30000#defineMTD_CONFIG_PART_SIZE0x10000#defineMTD_FACTORY_PART_SIZE0x10000#define MTD_DATA_PAPT_SIZE  CONFIG_MTD_PHYSMAP_DATA_LEN<span style="font-family: Arial, Helvetica, sans-serif;">/*添加data分区长度*/</span>#endif#endif#ifdef CONFIG_RT2880_ROOTFS_IN_FLASH#ifdef CONFIG_ROOTFS_IN_FLASH_NO_PADDING#define CONFIG_MTD_KERNEL_PART_SIZ 0#endif#define MTD_ROOTFS_PART_SIZEIMAGE1_SIZE - (MTD_BOOT_PART_SIZE + MTD_CONFIG_PART_SIZE \+ MTD_FACTORY_PART_SIZE + CONFIG_MTD_KERNEL_PART_SIZ  + MTD_DATA_PAPT_SIZE)#defineMTD_KERN_PART_SIZECONFIG_MTD_KERNEL_PART_SIZ//#defineMTD_KERN_PART_SIZE0x310000#else //CONFIG_RT2880_ROOTFS_IN_ROM#define MTD_KERN_PART_SIZEIMAGE1_SIZE - (MTD_BOOT_PART_SIZE + MTD_CONFIG_PART_SIZE \+ MTD_FACTORY_PART_SIZE + MTD_DATA_PAPT_SIZE)/*计算除去data分区长度后内存分区长度*///#defineMTD_KERN_PART_SIZE0x310000#endif

(3)定义data分区

static struct mtd_partition rt2880_partitions[] = {{                name:           "ALL",                size:           MTDPART_SIZ_FULL,                offset:         0,        },/* Put your own partition definitions here */        {                name:           "Bootloader",                size:           MTD_BOOT_PART_SIZE,                offset:         0,        }, {                name:           "Config",                size:           MTD_CONFIG_PART_SIZE,                offset:         MTDPART_OFS_APPEND        }, {                name:           "Factory",                size:           MTD_FACTORY_PART_SIZE,                offset:         MTDPART_OFS_APPEND#ifdef CONFIG_RT2880_ROOTFS_IN_FLASH        }, {                name:           "Kernel",                size:           MTD_KERN_PART_SIZE,                offset:         MTDPART_OFS_APPEND,        }, {                name:           "RootFS",                size:           MTD_ROOTFS_PART_SIZE,                offset:         MTDPART_OFS_APPEND,    #ifdef CONFIG_ROOTFS_IN_FLASH_NO_PADDING        }, {                name:           "Kernel_RootFS",                size:           MTD_KERN_PART_SIZE + MTD_ROOTFS_PART_SIZE,                offset:         MTD_BOOT_PART_SIZE + MTD_CONFIG_PART_SIZE + MTD_FACTORY_PART_SIZE,    #endif#else //CONFIG_RT2880_ROOTFS_IN_RAM        }, {                name:           "Kernel",                size:           MTD_KERN_PART_SIZE,                offset:         MTDPART_OFS_APPEND,#endif//CONFIG_RT2880_ROOTFS_IN_FLASH#ifdef CONFIG_DUAL_IMAGE        }, {                name:           "Kernel2",                size:           MTD_KERN2_PART_SIZE,                offset:         MTD_KERN2_PART_OFFSET,    #ifdef CONFIG_RT2880_ROOTFS_IN_FLASH        }, {                name:           "RootFS2",                size:           MTD_ROOTFS2_PART_SIZE,                offset:         MTD_ROOTFS2_PART_OFFSET,    #endif#endif//CONFIG_DUAL_IMAGE/*DATA分区添加部分*/}, {name:"Date", /* mtdblock5 */size:MTD_DATA_PAPT_SIZE, offset: MTDPART_OFS_APPEND,/*偏移量，data开头位置*/        }};

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