flash.c

来自「ecos实时嵌入式操作系统」· C语言 代码 · 共 1,912 行 · 第 1/5 页

        unsigned long erase_size;
        CYG_ADDRESS erase_start;
        // Erase everything except default RedBoot images, fis block, 
        // and config block.
        // First deal with the possible first part, before RedBoot images:
#if (CYGBLD_REDBOOT_FLASH_BOOT_OFFSET > CYGNUM_REDBOOT_FLASH_RESERVED_BASE)
        erase_start = (CYG_ADDRESS)flash_start + CYGNUM_REDBOOT_FLASH_RESERVED_BASE;
        erase_size =  (CYG_ADDRESS)flash_start + CYGBLD_REDBOOT_FLASH_BOOT_OFFSET;
        if ( erase_size > erase_start ) {
            erase_size -= erase_start;
            if ((stat = flash_erase((void *)erase_start, erase_size,
                                    (void **)&err_addr)) != 0) {
                diag_printf("   initialization failed at %p: %s\n",
                            err_addr, flash_errmsg(stat));
            }
        }
#endif
        // second deal with the larger part in the main:
        erase_start = redboot_flash_start; // high water of created images
        // Now the empty bits between the end of Redboot and the cfg and dir 
        // blocks. 
#if defined(CYGSEM_REDBOOT_FLASH_CONFIG) && !defined(CYGSEM_REDBOOT_FLASH_COMBINED_FIS_AND_CONFIG)
        if (fis_addr > cfg_base) {
          erase_size = (CYG_ADDRESS)cfg_base - erase_start; // the gap between HWM and config data
        } else {
          erase_size = (CYG_ADDRESS)fis_addr - erase_start; // the gap between HWM and fis data
        }
        if ((stat = flash_erase((void *)erase_start, erase_size,
                                (void **)&err_addr)) != 0) {
          diag_printf("   initialization failed %p: %s\n",
                 err_addr, flash_errmsg(stat));
        }
        erase_start += (erase_size + flash_block_size);
        if (fis_addr > cfg_base) {
          erase_size = (CYG_ADDRESS)fis_addr - erase_start; // the gap between config and fis data
        } else {
          erase_size = (CYG_ADDRESS)cfg_base - erase_start; // the gap between fis and config data
        }
        if ((stat = flash_erase((void *)erase_start, erase_size,
                                (void **)&err_addr)) != 0) {
          diag_printf("   initialization failed %p: %s\n",
                 err_addr, flash_errmsg(stat));
        }
        erase_start += (erase_size + flash_block_size);
#else  // !CYGSEM_REDBOOT_FLASH_CONFIG        
        erase_size = (CYG_ADDRESS)fis_addr - erase_start; // the gap between HWM and fis data
        if ((stat = flash_erase((void *)erase_start, erase_size,
                                (void **)&err_addr)) != 0) {
          diag_printf("   initialization failed %p: %s\n",
                 err_addr, flash_errmsg(stat));
        }
        erase_start += (erase_size + flash_block_size);          
#endif
        // Lastly, anything at the end
        erase_size = ((CYG_ADDRESS)flash_end - erase_start) + 1;
        if ((stat = flash_erase((void *)erase_start, erase_size,
                                (void **)&err_addr)) != 0) {
            diag_printf("   initialization failed at %p: %s\n",
                        err_addr, flash_errmsg(stat));
        }
    } else {
        diag_printf("    Warning: device contents not erased, some blocks may not be usable\n");
    }

    fis_update_directory();
}

static void
fis_list(int argc, char *argv[])
{
    struct fis_image_desc *img;
    int i;
    bool show_cksums = false;
    bool show_datalen = false;
    struct option_info opts[2];

#ifdef CYGHWR_REDBOOT_ARM_FLASH_SIB
    // FIXME: this is somewhat half-baked
    extern void arm_fis_list(void);
    arm_fis_list();
    return;
#endif

    init_opts(&opts[0], 'd', false, OPTION_ARG_TYPE_FLG, 
              (void **)&show_datalen, (bool *)0, "display data length");
#ifdef CYGSEM_REDBOOT_FIS_CRC_CHECK
    init_opts(&opts[1], 'c', false, OPTION_ARG_TYPE_FLG, 
              (void **)&show_cksums, (bool *)0, "display checksums");
    i = 2;
#else
    i = 1;
#endif
    if (!scan_opts(argc, argv, 2, opts, i, 0, 0, ""))
    {
        return;
    }
    img = (struct fis_image_desc *) fis_addr;
    // Let diag_printf do the formatting in both cases, rather than counting
    // cols by hand....
    diag_printf("%-16s  %-10s  %-10s  %-10s  %-s\n",
                "Name","FLASH addr",
                show_cksums ? "Checksum" : "Mem addr",
                show_datalen ? "Datalen" : "Length",
                "Entry point" );
    for (i = 0;  i < fisdir_size/sizeof(*img);  i++, img++) {
        if (img->name[0] != (unsigned char)0xFF) {
            diag_printf("%-16s  0x%08lX  0x%08lX  0x%08lX  0x%08lX\n", img->name, 
                        img->flash_base, 
#ifdef CYGSEM_REDBOOT_FIS_CRC_CHECK
                        show_cksums ? img->file_cksum : img->mem_base, 
                        show_datalen ? img->data_length : img->size, 
#else
                        img->mem_base, 
                        img->size, 
#endif
                        img->entry_point);
        }
    }
}

static void
fis_free(int argc, char *argv[])
{
    unsigned long *fis_ptr, *fis_end;
    unsigned long *area_start;

    // Do not search the area reserved for pre-RedBoot systems:
    fis_ptr = (unsigned long *)((CYG_ADDRESS)flash_start + CYGNUM_REDBOOT_FLASH_RESERVED_BASE);
    fis_end = (unsigned long *)(CYG_ADDRESS)flash_end;
    area_start = fis_ptr;
    while (fis_ptr < fis_end) {
        if (*fis_ptr != (unsigned long)0xFFFFFFFF) {
            if (area_start != fis_ptr) {
                // Assume that this is something
                diag_printf("  0x%08lX .. 0x%08lX\n",
                            (CYG_ADDRESS)area_start, (CYG_ADDRESS)fis_ptr);
            }
            // Find next blank block
            area_start = fis_ptr;
            while (area_start < fis_end) {
                if (*area_start == (unsigned long)0xFFFFFFFF) {
                    break;
                }
                area_start += flash_block_size / sizeof(CYG_ADDRESS);
            }
            fis_ptr = area_start;
        } else {
            fis_ptr += flash_block_size / sizeof(CYG_ADDRESS);
        }
    }
    if (area_start != fis_ptr) {
        diag_printf("  0x%08lX .. 0x%08lX\n", 
                    (CYG_ADDRESS)area_start, (CYG_ADDRESS)fis_ptr);
    }
}

// Find the first unused area of flash which is long enough
static bool
fis_find_free(CYG_ADDRESS *addr, unsigned long length)
{
    unsigned long *fis_ptr, *fis_end;
    unsigned long *area_start;

    // Do not search the area reserved for pre-RedBoot systems:
    fis_ptr = (unsigned long *)((CYG_ADDRESS)flash_start + CYGNUM_REDBOOT_FLASH_RESERVED_BASE);
    fis_end = (unsigned long *)(CYG_ADDRESS)flash_end;
    area_start = fis_ptr;
    while (fis_ptr < fis_end) {
        if (*fis_ptr != (unsigned long)0xFFFFFFFF) {
            if (area_start != fis_ptr) {
                // Assume that this is something
                if ((fis_ptr-area_start) >= (length/sizeof(unsigned))) {
                    *addr = (CYG_ADDRESS)area_start;
                    return true;
                }
            }
            // Find next blank block
            area_start = fis_ptr;
            while (area_start < fis_end) {
                if (*area_start == (unsigned long)0xFFFFFFFF) {
                    break;
                }
                area_start += flash_block_size / sizeof(CYG_ADDRESS);
            }
            fis_ptr = area_start;
        } else {
            fis_ptr += flash_block_size / sizeof(CYG_ADDRESS);
        }
    }
    if (area_start != fis_ptr) {
        if ((fis_ptr-area_start) >= (length/sizeof(unsigned))) {
            *addr = (CYG_ADDRESS)area_start;
            return true;
        }
    }
    return false;
}

static void
fis_create(int argc, char *argv[])
{
    int i, stat;
    unsigned long length, img_size;
    CYG_ADDRESS mem_addr, exec_addr, flash_addr, entry_addr;
    char *name;
    bool mem_addr_set = false;
    bool exec_addr_set = false;
    bool entry_addr_set = false;
    bool flash_addr_set = false;
    bool length_set = false;
    bool img_size_set = false;
    bool no_copy = false;
    void *err_addr;
    struct fis_image_desc *img = NULL;
    bool defaults_assumed;
    struct option_info opts[7];
    bool prog_ok = true;

    init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM, 
              (void **)&mem_addr, (bool *)&mem_addr_set, "memory base address");
    init_opts(&opts[1], 'r', true, OPTION_ARG_TYPE_NUM, 
              (void **)&exec_addr, (bool *)&exec_addr_set, "ram base address");
    init_opts(&opts[2], 'e', true, OPTION_ARG_TYPE_NUM, 
              (void **)&entry_addr, (bool *)&entry_addr_set, "entry point address");
    init_opts(&opts[3], 'f', true, OPTION_ARG_TYPE_NUM, 
              (void **)&flash_addr, (bool *)&flash_addr_set, "FLASH memory base address");
    init_opts(&opts[4], 'l', true, OPTION_ARG_TYPE_NUM, 
              (void **)&length, (bool *)&length_set, "image length [in FLASH]");
    init_opts(&opts[5], 's', true, OPTION_ARG_TYPE_NUM, 
              (void **)&img_size, (bool *)&img_size_set, "image size [actual data]");
    init_opts(&opts[6], 'n', false, OPTION_ARG_TYPE_FLG, 
              (void **)&no_copy, (bool *)0, "don't copy from RAM to FLASH, just update directory");
    if (!scan_opts(argc, argv, 2, opts, 7, (void *)&name, OPTION_ARG_TYPE_STR, "file name"))
    {
        fis_usage("invalid arguments");
        return;
    }

    memcpy(fis_work_block, fis_addr, fisdir_size);
    defaults_assumed = false;
    if (name) {
        // Search existing files to acquire defaults for params not specified:
        img = fis_lookup(name, NULL);
        if (img) {
            // Found it, so get image size from there
            if (!length_set) {
                length_set = true;
                length = img->size;
                defaults_assumed = true;
            }
        }
    }
    if (!mem_addr_set && (load_address >= (CYG_ADDRESS)ram_start) &&
	(load_address_end) < (CYG_ADDRESS)ram_end) {
	mem_addr = load_address;
	mem_addr_set = true;
        defaults_assumed = true;
        // Get entry address from loader, unless overridden
        if (!entry_addr_set)
            entry_addr = entry_address;
	if (!length_set) {
	    length = load_address_end - load_address;
	    length_set = true;
	} else if (defaults_assumed && !img_size_set) {
	    /* We got length from the FIS table, so the size of the
	       actual loaded image becomes img_size */
	    img_size = load_address_end - load_address;
	    img_size_set = true;
	}
    }
    // Get the remaining fall-back values from the fis
    if (img) {
        if (!exec_addr_set) {
            // Preserve "normal" behaviour
            exec_addr_set = true;
            exec_addr = flash_addr_set ? flash_addr : mem_addr;
        }
        if (!flash_addr_set) {
            flash_addr_set = true;
            flash_addr = img->flash_base;
            defaults_assumed = true;
        }
    }

    if ((!no_copy && !mem_addr_set) || (no_copy && !flash_addr_set) ||
        !length_set || !name) {
        fis_usage("required parameter missing");
        return;
    }
    if (!img_size_set) {
        img_size = length;
    }
    // 'length' is size of FLASH image, 'img_size' is actual data size
    // Round up length to FLASH block size
#ifndef CYGPKG_HAL_MIPS // FIXME: compiler is b0rken
    length = ((length + flash_block_size - 1) / flash_block_size) * flash_block_size;
    if (length < img_size) {
        diag_printf("Invalid FLASH image size/length combination\n");
        return;
    }
#endif
    if (flash_addr_set &&
        ((stat = flash_verify_addr((void *)flash_addr)) ||
         (stat = flash_verify_addr((void *)(flash_addr+img_size-1))))) {
        _show_invalid_flash_address(flash_addr, stat);
        return;
    }
    if (flash_addr_set && flash_addr & (flash_block_size-1)) {
        diag_printf("Invalid FLASH address: %p\n", (void *)flash_addr);
        diag_printf("   must be 0x%x aligned\n", flash_block_size);
        return;
    }
    if (strlen(name) >= sizeof(img->name)) {
        diag_printf("Name is too long, must be less than %d chars\n", (int)sizeof(img->name));
        return;
    }
    if (!no_copy) {
        if ((mem_addr < (CYG_ADDRESS)ram_start) ||
            ((mem_addr+img_size) >= (CYG_ADDRESS)ram_end)) {
            diag_printf("** WARNING: RAM address: %p may be invalid\n", (void *)mem_addr);
            diag_printf("   valid range is %p-%p\n", (void *)ram_start, (void *)ram_end);
        }
        if (!flash_addr_set && !fis_find_free(&flash_addr, length)) {
            diag_printf("Can't locate %lx(%ld) bytes free in FLASH\n", length, length);
            return;
        }
    }
    // First, see if the image by this name has agreable properties
    if (img) {
        if (flash_addr_set && (img->flash_base != flash_addr)) {
            diag_printf("Image found, but flash address (%p)\n"
                        "             is incorrect (present image location %p)\n",
                        flash_addr, img->flash_base);
            
            return;
        }
        if (img->size != length) {
            diag_printf("Image found, but length (0x%lx, necessitating image size 0x%lx)\n"
                        "             is incorrect (present image size 0x%lx)\n",
                        img_size, length, img->size);
            return;
        }
        if (!verify_action("An image named '%s' exists", name)) {
            return;
        } else {                
            if (defaults_assumed) {
                if (no_copy &&
                    !verify_action("* CAUTION * about to program '%s'\n            at %p..%p from %p", 
                                   name, (void *)flash_addr, (void *)(flash_addr+img_size-1),
                                   (void *)mem_addr)) {
                    return;  // The guy gave up
                }
            }
        }
    } else {
        // If not image by that name, try and find an empty slot
        img = (struct fis_image_desc *)fis_work_block;
        for (i = 0;  i < fisdir_size/sizeof(*img);  i++, img++) {
            if (img->name[0] == (unsigned char)0xFF) {
                break;
            }
        }
    }
    if (!no_copy) {
        // Safety check - make sure the address range is not within the code we're running
        if (flash_code_overlaps((void *)flash_addr, (void *)(flash_addr+img_size-1))) {
            diag_printf("Can't program this region - contains code in use!\n");
            return;
        }
        if (prog_ok) {
            // Erase area to be programmed
            if ((stat = flash_erase((void *)flash_addr, length, (void **)&err_addr)) != 0) {
                diag_printf("Can't erase region at %p: %s\n", err_addr, flash_errmsg(stat));
                prog_ok = false;
            }
        }
        if (prog_ok) {
            // Now program it
            if ((stat = flash_program((void *)flash_addr, (void *)mem_addr, img_size, (void **)&err_addr)) != 0) {
                diag_printf("Can't program region at %p: %s\n", err_addr, flash_errmsg(stat));
                prog_ok = false;
            }
        }