慢慢欣赏linux MTD flash

最新推荐文章于 2023-08-02 12:03:54 发布

原创最新推荐文章于 2023-08-02 12:03:54 发布 · 208 阅读

0 ·

CC 4.0 BY-SA版权

linux内核专栏收录该内容

270 篇文章

订阅专栏

本文详细解析了H720X设备中闪存的初始化过程，包括内存映射、简单映射初始化、CFI探针使用、分区定义及MTD分区添加等关键步骤，为理解嵌入式系统中闪存管理提供了深入视角。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

static int __init h720x_mtd_init(void)
   h720x_map.virt = ioremap(h720x_map.phys, h720x_map.size);
   simple_map_init(&h720x_map);
   mymtd = do_map_probe("cfi_probe", &h720x_map);
                                           /\
                                           ||
                                           \/
                               static struct map_info h720x_map = {
                                   .name =       "H720X",
                                   .bankwidth =   4,
                                   .size =       H720X_FLASH_SIZE,
                                   .phys =       H720X_FLASH_PHYS,
                               };
   mtd_parts = h720x_partitions;
                   /\
                   ||
                   \/
                   static struct mtd_partition h720x_partitions[] = {
                           {
                                   .name = "ArMon",
                                   .size = 0x00080000,
                                   .offset = 0,
                                   .mask_flags = MTD_WRITEABLE
                           },{
                                   .name = "Env",
                                   .size = 0x00040000,
                                   .offset = 0x00080000,
                                   .mask_flags = MTD_WRITEABLE
                           },{
                                   .name = "Kernel",
                                   .size = 0x00180000,
                                   .offset = 0x000c0000,
                                   .mask_flags = MTD_WRITEABLE
                           },{
                                   .name = "Ramdisk",
                                   .size = 0x00400000,
                                   .offset = 0x00240000,
                                   .mask_flags = MTD_WRITEABLE
                           },{
                                   .name = "jffs2",
                                   .size = MTDPART_SIZ_FULL,
                                   .offset = MTDPART_OFS_APPEND
                           }
                   };
   add_mtd_partitions(mymtd, mtd_parts, nr_mtd_parts);
   iounmap((void *)h720x_map.virt);