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![Alexander Graf](/assets/img/avatar_default.png)
We have a pretty nice and generic interface to ask for a specific block device. However, that one is still based around the magic notion that we know the driver name. In order to be able to write fully generic disk access code, expose the currently internal list to other source files so that they can scan through all available block drivers. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
666 lines
15 KiB
C
666 lines
15 KiB
C
/*
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* (C) Copyright 2001
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <errno.h>
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#include <ide.h>
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#include <malloc.h>
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#include <part.h>
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#include <ubifs_uboot.h>
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#undef PART_DEBUG
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#ifdef PART_DEBUG
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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const struct block_drvr block_drvr[] = {
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#if defined(CONFIG_CMD_IDE)
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{ .name = "ide", .get_dev = ide_get_dev, },
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#endif
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#if defined(CONFIG_CMD_SATA)
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{.name = "sata", .get_dev = sata_get_dev, },
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#endif
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#if defined(CONFIG_CMD_SCSI)
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{ .name = "scsi", .get_dev = scsi_get_dev, },
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#endif
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#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
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{ .name = "usb", .get_dev = usb_stor_get_dev, },
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#endif
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#if defined(CONFIG_MMC)
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{
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.name = "mmc",
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.get_dev = mmc_get_dev,
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.select_hwpart = mmc_select_hwpart,
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},
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#endif
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#if defined(CONFIG_SYSTEMACE)
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{ .name = "ace", .get_dev = systemace_get_dev, },
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#endif
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#if defined(CONFIG_SANDBOX)
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{ .name = "host", .get_dev = host_get_dev, },
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#endif
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{ },
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};
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef HAVE_BLOCK_DEVICE
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static struct part_driver *part_driver_lookup_type(int part_type)
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{
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struct part_driver *drv =
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ll_entry_start(struct part_driver, part_driver);
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const int n_ents = ll_entry_count(struct part_driver, part_driver);
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struct part_driver *entry;
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for (entry = drv; entry != drv + n_ents; entry++) {
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if (part_type == entry->part_type)
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return entry;
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}
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/* Not found */
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return NULL;
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}
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static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
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{
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const struct block_drvr *drvr = block_drvr;
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struct blk_desc* (*reloc_get_dev)(int dev);
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int (*select_hwpart)(int dev_num, int hwpart);
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char *name;
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int ret;
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if (!ifname)
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return NULL;
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name = drvr->name;
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#ifdef CONFIG_NEEDS_MANUAL_RELOC
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name += gd->reloc_off;
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#endif
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while (drvr->name) {
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name = drvr->name;
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reloc_get_dev = drvr->get_dev;
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select_hwpart = drvr->select_hwpart;
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#ifdef CONFIG_NEEDS_MANUAL_RELOC
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name += gd->reloc_off;
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reloc_get_dev += gd->reloc_off;
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if (select_hwpart)
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select_hwpart += gd->reloc_off;
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#endif
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if (strncmp(ifname, name, strlen(name)) == 0) {
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struct blk_desc *dev_desc = reloc_get_dev(dev);
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if (!dev_desc)
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return NULL;
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if (hwpart == 0 && !select_hwpart)
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return dev_desc;
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if (!select_hwpart)
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return NULL;
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ret = select_hwpart(dev_desc->devnum, hwpart);
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if (ret < 0)
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return NULL;
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return dev_desc;
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}
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drvr++;
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}
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return NULL;
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}
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struct blk_desc *blk_get_dev(const char *ifname, int dev)
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{
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return get_dev_hwpart(ifname, dev, 0);
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}
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#else
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struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
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{
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return NULL;
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}
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struct blk_desc *blk_get_dev(const char *ifname, int dev)
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{
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return NULL;
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}
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#endif
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#ifdef HAVE_BLOCK_DEVICE
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/* ------------------------------------------------------------------------- */
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/*
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* reports device info to the user
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*/
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#ifdef CONFIG_LBA48
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typedef uint64_t lba512_t;
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#else
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typedef lbaint_t lba512_t;
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#endif
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/*
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* Overflowless variant of (block_count * mul_by / div_by)
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* when div_by > mul_by
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*/
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static lba512_t lba512_muldiv(lba512_t block_count, lba512_t mul_by, lba512_t div_by)
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{
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lba512_t bc_quot, bc_rem;
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/* x * m / d == x / d * m + (x % d) * m / d */
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bc_quot = block_count / div_by;
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bc_rem = block_count - div_by * bc_quot;
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return bc_quot * mul_by + (bc_rem * mul_by) / div_by;
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}
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void dev_print (struct blk_desc *dev_desc)
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{
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lba512_t lba512; /* number of blocks if 512bytes block size */
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if (dev_desc->type == DEV_TYPE_UNKNOWN) {
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puts ("not available\n");
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return;
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}
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switch (dev_desc->if_type) {
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case IF_TYPE_SCSI:
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printf ("(%d:%d) Vendor: %s Prod.: %s Rev: %s\n",
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dev_desc->target,dev_desc->lun,
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dev_desc->vendor,
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dev_desc->product,
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dev_desc->revision);
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break;
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case IF_TYPE_ATAPI:
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case IF_TYPE_IDE:
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case IF_TYPE_SATA:
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printf ("Model: %s Firm: %s Ser#: %s\n",
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dev_desc->vendor,
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dev_desc->revision,
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dev_desc->product);
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break;
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case IF_TYPE_SD:
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case IF_TYPE_MMC:
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case IF_TYPE_USB:
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printf ("Vendor: %s Rev: %s Prod: %s\n",
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dev_desc->vendor,
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dev_desc->revision,
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dev_desc->product);
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break;
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case IF_TYPE_DOC:
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puts("device type DOC\n");
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return;
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case IF_TYPE_UNKNOWN:
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puts("device type unknown\n");
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return;
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default:
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printf("Unhandled device type: %i\n", dev_desc->if_type);
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return;
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}
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puts (" Type: ");
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if (dev_desc->removable)
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puts ("Removable ");
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switch (dev_desc->type & 0x1F) {
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case DEV_TYPE_HARDDISK:
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puts ("Hard Disk");
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break;
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case DEV_TYPE_CDROM:
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puts ("CD ROM");
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break;
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case DEV_TYPE_OPDISK:
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puts ("Optical Device");
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break;
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case DEV_TYPE_TAPE:
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puts ("Tape");
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break;
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default:
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printf ("# %02X #", dev_desc->type & 0x1F);
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break;
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}
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puts ("\n");
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if (dev_desc->lba > 0L && dev_desc->blksz > 0L) {
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ulong mb, mb_quot, mb_rem, gb, gb_quot, gb_rem;
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lbaint_t lba;
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lba = dev_desc->lba;
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lba512 = (lba * (dev_desc->blksz/512));
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/* round to 1 digit */
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/* 2048 = (1024 * 1024) / 512 MB */
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mb = lba512_muldiv(lba512, 10, 2048);
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mb_quot = mb / 10;
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mb_rem = mb - (10 * mb_quot);
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gb = mb / 1024;
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gb_quot = gb / 10;
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gb_rem = gb - (10 * gb_quot);
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#ifdef CONFIG_LBA48
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if (dev_desc->lba48)
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printf (" Supports 48-bit addressing\n");
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#endif
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#if defined(CONFIG_SYS_64BIT_LBA)
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printf (" Capacity: %ld.%ld MB = %ld.%ld GB (%Ld x %ld)\n",
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mb_quot, mb_rem,
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gb_quot, gb_rem,
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lba,
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dev_desc->blksz);
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#else
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printf (" Capacity: %ld.%ld MB = %ld.%ld GB (%ld x %ld)\n",
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mb_quot, mb_rem,
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gb_quot, gb_rem,
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(ulong)lba,
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dev_desc->blksz);
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#endif
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} else {
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puts (" Capacity: not available\n");
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}
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}
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#endif
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#ifdef HAVE_BLOCK_DEVICE
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void part_init(struct blk_desc *dev_desc)
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{
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struct part_driver *drv =
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ll_entry_start(struct part_driver, part_driver);
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const int n_ents = ll_entry_count(struct part_driver, part_driver);
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struct part_driver *entry;
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dev_desc->part_type = PART_TYPE_UNKNOWN;
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for (entry = drv; entry != drv + n_ents; entry++) {
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int ret;
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ret = entry->test(dev_desc);
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debug("%s: try '%s': ret=%d\n", __func__, entry->name, ret);
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if (!ret) {
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dev_desc->part_type = entry->part_type;
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break;
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}
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}
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}
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static void print_part_header(const char *type, struct blk_desc *dev_desc)
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{
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#if defined(CONFIG_MAC_PARTITION) || \
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defined(CONFIG_DOS_PARTITION) || \
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defined(CONFIG_ISO_PARTITION) || \
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defined(CONFIG_AMIGA_PARTITION) || \
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defined(CONFIG_EFI_PARTITION)
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puts ("\nPartition Map for ");
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switch (dev_desc->if_type) {
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case IF_TYPE_IDE:
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puts ("IDE");
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break;
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case IF_TYPE_SATA:
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puts ("SATA");
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break;
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case IF_TYPE_SCSI:
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puts ("SCSI");
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break;
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case IF_TYPE_ATAPI:
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puts ("ATAPI");
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break;
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case IF_TYPE_USB:
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puts ("USB");
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break;
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case IF_TYPE_DOC:
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puts ("DOC");
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break;
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case IF_TYPE_MMC:
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puts ("MMC");
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break;
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case IF_TYPE_HOST:
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puts("HOST");
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break;
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default:
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puts ("UNKNOWN");
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break;
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}
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printf (" device %d -- Partition Type: %s\n\n",
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dev_desc->devnum, type);
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#endif /* any CONFIG_..._PARTITION */
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}
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void part_print(struct blk_desc *dev_desc)
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{
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struct part_driver *drv;
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drv = part_driver_lookup_type(dev_desc->part_type);
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if (!drv) {
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printf("## Unknown partition table type %x\n",
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dev_desc->part_type);
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return;
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}
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PRINTF("## Testing for valid %s partition ##\n", drv->name);
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print_part_header(drv->name, dev_desc);
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if (drv->print)
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drv->print(dev_desc);
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}
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#endif /* HAVE_BLOCK_DEVICE */
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int part_get_info(struct blk_desc *dev_desc, int part,
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disk_partition_t *info)
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{
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#ifdef HAVE_BLOCK_DEVICE
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struct part_driver *drv;
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#ifdef CONFIG_PARTITION_UUIDS
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/* The common case is no UUID support */
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info->uuid[0] = 0;
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#endif
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#ifdef CONFIG_PARTITION_TYPE_GUID
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info->type_guid[0] = 0;
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#endif
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drv = part_driver_lookup_type(dev_desc->part_type);
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if (!drv) {
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debug("## Unknown partition table type %x\n",
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dev_desc->part_type);
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return -EPROTONOSUPPORT;
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}
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if (!drv->get_info) {
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PRINTF("## Driver %s does not have the get_info() method\n");
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return -ENOSYS;
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}
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if (drv->get_info(dev_desc, part, info) == 0) {
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PRINTF("## Valid %s partition found ##\n", drv->name);
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return 0;
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}
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#endif /* HAVE_BLOCK_DEVICE */
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return -1;
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}
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int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
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struct blk_desc **dev_desc)
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{
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char *ep;
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char *dup_str = NULL;
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const char *dev_str, *hwpart_str;
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int dev, hwpart;
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hwpart_str = strchr(dev_hwpart_str, '.');
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if (hwpart_str) {
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dup_str = strdup(dev_hwpart_str);
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dup_str[hwpart_str - dev_hwpart_str] = 0;
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dev_str = dup_str;
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hwpart_str++;
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} else {
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dev_str = dev_hwpart_str;
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hwpart = 0;
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}
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dev = simple_strtoul(dev_str, &ep, 16);
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if (*ep) {
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printf("** Bad device specification %s %s **\n",
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ifname, dev_str);
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dev = -1;
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goto cleanup;
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}
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if (hwpart_str) {
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hwpart = simple_strtoul(hwpart_str, &ep, 16);
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if (*ep) {
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printf("** Bad HW partition specification %s %s **\n",
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ifname, hwpart_str);
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dev = -1;
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goto cleanup;
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}
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}
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*dev_desc = get_dev_hwpart(ifname, dev, hwpart);
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if (!(*dev_desc) || ((*dev_desc)->type == DEV_TYPE_UNKNOWN)) {
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printf("** Bad device %s %s **\n", ifname, dev_hwpart_str);
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dev = -1;
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goto cleanup;
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}
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#ifdef HAVE_BLOCK_DEVICE
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/*
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* Updates the partition table for the specified hw partition.
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* Does not need to be done for hwpart 0 since it is default and
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* already loaded.
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*/
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if(hwpart != 0)
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part_init(*dev_desc);
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#endif
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cleanup:
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free(dup_str);
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return dev;
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}
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#define PART_UNSPECIFIED -2
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#define PART_AUTO -1
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#define MAX_SEARCH_PARTITIONS 16
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int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
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struct blk_desc **dev_desc,
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disk_partition_t *info, int allow_whole_dev)
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{
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int ret = -1;
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const char *part_str;
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char *dup_str = NULL;
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const char *dev_str;
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int dev;
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char *ep;
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int p;
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int part;
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disk_partition_t tmpinfo;
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#ifdef CONFIG_SANDBOX
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/*
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* Special-case a pseudo block device "hostfs", to allow access to the
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* host's own filesystem.
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*/
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if (0 == strcmp(ifname, "hostfs")) {
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*dev_desc = NULL;
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info->start = 0;
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info->size = 0;
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info->blksz = 0;
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info->bootable = 0;
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strcpy((char *)info->type, BOOT_PART_TYPE);
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strcpy((char *)info->name, "Sandbox host");
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#ifdef CONFIG_PARTITION_UUIDS
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info->uuid[0] = 0;
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#endif
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#ifdef CONFIG_PARTITION_TYPE_GUID
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info->type_guid[0] = 0;
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#endif
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return 0;
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}
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#endif
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#ifdef CONFIG_CMD_UBIFS
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/*
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* Special-case ubi, ubi goes through a mtd, rathen then through
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* a regular block device.
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*/
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if (0 == strcmp(ifname, "ubi")) {
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if (!ubifs_is_mounted()) {
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printf("UBIFS not mounted, use ubifsmount to mount volume first!\n");
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return -1;
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}
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*dev_desc = NULL;
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memset(info, 0, sizeof(*info));
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strcpy((char *)info->type, BOOT_PART_TYPE);
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strcpy((char *)info->name, "UBI");
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#ifdef CONFIG_PARTITION_UUIDS
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info->uuid[0] = 0;
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#endif
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return 0;
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}
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#endif
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/* If no dev_part_str, use bootdevice environment variable */
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if (!dev_part_str || !strlen(dev_part_str) ||
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!strcmp(dev_part_str, "-"))
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dev_part_str = getenv("bootdevice");
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/* If still no dev_part_str, it's an error */
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if (!dev_part_str) {
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printf("** No device specified **\n");
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goto cleanup;
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}
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/* Separate device and partition ID specification */
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part_str = strchr(dev_part_str, ':');
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if (part_str) {
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dup_str = strdup(dev_part_str);
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dup_str[part_str - dev_part_str] = 0;
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dev_str = dup_str;
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part_str++;
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} else {
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dev_str = dev_part_str;
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}
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/* Look up the device */
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dev = blk_get_device_by_str(ifname, dev_str, dev_desc);
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if (dev < 0)
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|
goto cleanup;
|
|
|
|
/* Convert partition ID string to number */
|
|
if (!part_str || !*part_str) {
|
|
part = PART_UNSPECIFIED;
|
|
} else if (!strcmp(part_str, "auto")) {
|
|
part = PART_AUTO;
|
|
} else {
|
|
/* Something specified -> use exactly that */
|
|
part = (int)simple_strtoul(part_str, &ep, 16);
|
|
/*
|
|
* Less than whole string converted,
|
|
* or request for whole device, but caller requires partition.
|
|
*/
|
|
if (*ep || (part == 0 && !allow_whole_dev)) {
|
|
printf("** Bad partition specification %s %s **\n",
|
|
ifname, dev_part_str);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* No partition table on device,
|
|
* or user requested partition 0 (entire device).
|
|
*/
|
|
if (((*dev_desc)->part_type == PART_TYPE_UNKNOWN) ||
|
|
(part == 0)) {
|
|
if (!(*dev_desc)->lba) {
|
|
printf("** Bad device size - %s %s **\n", ifname,
|
|
dev_str);
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* If user specified a partition ID other than 0,
|
|
* or the calling command only accepts partitions,
|
|
* it's an error.
|
|
*/
|
|
if ((part > 0) || (!allow_whole_dev)) {
|
|
printf("** No partition table - %s %s **\n", ifname,
|
|
dev_str);
|
|
goto cleanup;
|
|
}
|
|
|
|
(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
|
|
|
|
info->start = 0;
|
|
info->size = (*dev_desc)->lba;
|
|
info->blksz = (*dev_desc)->blksz;
|
|
info->bootable = 0;
|
|
strcpy((char *)info->type, BOOT_PART_TYPE);
|
|
strcpy((char *)info->name, "Whole Disk");
|
|
#ifdef CONFIG_PARTITION_UUIDS
|
|
info->uuid[0] = 0;
|
|
#endif
|
|
#ifdef CONFIG_PARTITION_TYPE_GUID
|
|
info->type_guid[0] = 0;
|
|
#endif
|
|
|
|
ret = 0;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* Now there's known to be a partition table,
|
|
* not specifying a partition means to pick partition 1.
|
|
*/
|
|
if (part == PART_UNSPECIFIED)
|
|
part = 1;
|
|
|
|
/*
|
|
* If user didn't specify a partition number, or did specify something
|
|
* other than "auto", use that partition number directly.
|
|
*/
|
|
if (part != PART_AUTO) {
|
|
ret = part_get_info(*dev_desc, part, info);
|
|
if (ret) {
|
|
printf("** Invalid partition %d **\n", part);
|
|
goto cleanup;
|
|
}
|
|
} else {
|
|
/*
|
|
* Find the first bootable partition.
|
|
* If none are bootable, fall back to the first valid partition.
|
|
*/
|
|
part = 0;
|
|
for (p = 1; p <= MAX_SEARCH_PARTITIONS; p++) {
|
|
ret = part_get_info(*dev_desc, p, info);
|
|
if (ret)
|
|
continue;
|
|
|
|
/*
|
|
* First valid partition, or new better partition?
|
|
* If so, save partition ID.
|
|
*/
|
|
if (!part || info->bootable)
|
|
part = p;
|
|
|
|
/* Best possible partition? Stop searching. */
|
|
if (info->bootable)
|
|
break;
|
|
|
|
/*
|
|
* We now need to search further for best possible.
|
|
* If we what we just queried was the best so far,
|
|
* save the info since we over-write it next loop.
|
|
*/
|
|
if (part == p)
|
|
tmpinfo = *info;
|
|
}
|
|
/* If we found any acceptable partition */
|
|
if (part) {
|
|
/*
|
|
* If we searched all possible partition IDs,
|
|
* return the first valid partition we found.
|
|
*/
|
|
if (p == MAX_SEARCH_PARTITIONS + 1)
|
|
*info = tmpinfo;
|
|
} else {
|
|
printf("** No valid partitions found **\n");
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
if (strncmp((char *)info->type, BOOT_PART_TYPE, sizeof(info->type)) != 0) {
|
|
printf("** Invalid partition type \"%.32s\""
|
|
" (expect \"" BOOT_PART_TYPE "\")\n",
|
|
info->type);
|
|
ret = -1;
|
|
goto cleanup;
|
|
}
|
|
|
|
(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
|
|
|
|
ret = part;
|
|
goto cleanup;
|
|
|
|
cleanup:
|
|
free(dup_str);
|
|
return ret;
|
|
}
|