+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2001
* Raymond Lo, lo@routefree.com
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
/*
*/
#include <common.h>
+#include <blk.h>
#include <command.h>
#include <ide.h>
#include <memalign.h>
+#include <asm/unaligned.h>
+#include <linux/compiler.h>
#include "part_dos.h"
+#include <part.h>
-#ifdef HAVE_BLOCK_DEVICE
+#ifdef CONFIG_HAVE_BLOCK_DEVICE
#define DOS_PART_DEFAULT_SECTOR 512
-/* Convert char[4] in little endian format to the host format integer
- */
-static inline unsigned int le32_to_int(unsigned char *le32)
-{
- return ((le32[3] << 24) +
- (le32[2] << 16) +
- (le32[1] << 8) +
- le32[0]
- );
-}
+/* should this be configurable? It looks like it's not very common at all
+ * to use large numbers of partitions */
+#define MAX_EXT_PARTS 256
static inline int is_extended(int part_type)
{
- return (part_type == 0x5 ||
- part_type == 0xf ||
- part_type == 0x85);
+ return (part_type == DOS_PART_TYPE_EXTENDED ||
+ part_type == DOS_PART_TYPE_EXTENDED_LBA ||
+ part_type == DOS_PART_TYPE_EXTENDED_LINUX);
}
-static inline int is_bootable(dos_partition_t *p)
+static int get_bootable(dos_partition_t *p)
{
- return p->boot_ind == 0x80;
+ int ret = 0;
+
+ if (p->sys_ind == 0xef)
+ ret |= PART_EFI_SYSTEM_PARTITION;
+ if (p->boot_ind == 0x80)
+ ret |= PART_BOOTABLE;
+ return ret;
}
static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
int part_num, unsigned int disksig)
{
- lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
- lbaint_t lba_size = le32_to_int (p->size4);
+ lbaint_t lba_start = ext_part_sector + get_unaligned_le32(p->start4);
+ lbaint_t lba_size = get_unaligned_le32(p->size4);
printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
"u\t%08x-%02x\t%02x%s%s\n",
part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
(is_extended(p->sys_ind) ? " Extd" : ""),
- (is_bootable(p) ? " Boot" : ""));
+ (get_bootable(p) ? " Boot" : ""));
}
static int test_block_type(unsigned char *buffer)
{
int slot;
struct dos_partition *p;
+ int part_count = 0;
if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
(buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
return (-1);
} /* no DOS Signature at all */
p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];
- for (slot = 0; slot < 3; slot++) {
- if (p->boot_ind != 0 && p->boot_ind != 0x80) {
- if (!slot &&
- (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
- "FAT", 3) == 0 ||
- strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
- "FAT32", 5) == 0)) {
- return DOS_PBR; /* is PBR */
- } else {
- return -1;
- }
- }
+
+ /* Check that the boot indicators are valid and count the partitions. */
+ for (slot = 0; slot < 4; ++slot, ++p) {
+ if (p->boot_ind != 0 && p->boot_ind != 0x80)
+ break;
+ if (p->sys_ind)
+ ++part_count;
}
- return DOS_MBR; /* Is MBR */
-}
+ /*
+ * If the partition table is invalid or empty,
+ * check if this is a DOS PBR
+ */
+ if (slot != 4 || !part_count) {
+ if (!strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
+ "FAT", 3) ||
+ !strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
+ "FAT32", 5))
+ return DOS_PBR; /* This is a DOS PBR and not an MBR */
+ }
+ if (slot == 4)
+ return DOS_MBR; /* This is an DOS MBR */
+
+ /* This is neither a DOS MBR nor a DOS PBR */
+ return -1;
+}
static int part_test_dos(struct blk_desc *dev_desc)
{
+#ifndef CONFIG_SPL_BUILD
+ ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr,
+ DIV_ROUND_UP(dev_desc->blksz, sizeof(legacy_mbr)));
+
+ if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
+ return -1;
+
+ if (test_block_type((unsigned char *)mbr) != DOS_MBR)
+ return -1;
+
+ if (dev_desc->sig_type == SIG_TYPE_NONE &&
+ mbr->unique_mbr_signature != 0) {
+ dev_desc->sig_type = SIG_TYPE_MBR;
+ dev_desc->mbr_sig = mbr->unique_mbr_signature;
+ }
+#else
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
if (test_block_type(buffer) != DOS_MBR)
return -1;
+#endif
return 0;
}
dos_partition_t *pt;
int i;
+ /* set a maximum recursion level */
+ if (part_num > MAX_EXT_PARTS)
+ {
+ printf("** Nested DOS partitions detected, stopping **\n");
+ return;
+ }
+
if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
printf ("** Can't read partition table on %d:" LBAFU " **\n",
dev_desc->devnum, ext_part_sector);
}
if (!ext_part_sector)
- disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
+ disksig = get_unaligned_le32(&buffer[DOS_PART_DISKSIG_OFFSET]);
/* Print all primary/logical partitions */
pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
for (i = 0; i < 4; i++, pt++) {
if (is_extended (pt->sys_ind)) {
lbaint_t lba_start
- = le32_to_int (pt->start4) + relative;
+ = get_unaligned_le32 (pt->start4) + relative;
print_partition_extended(dev_desc, lba_start,
ext_part_sector == 0 ? lba_start : relative,
static int part_get_info_extended(struct blk_desc *dev_desc,
lbaint_t ext_part_sector, lbaint_t relative,
int part_num, int which_part,
- disk_partition_t *info, unsigned int disksig)
+ struct disk_partition *info, uint disksig)
{
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
dos_partition_t *pt;
int i;
int dos_type;
+ /* set a maximum recursion level */
+ if (part_num > MAX_EXT_PARTS)
+ {
+ printf("** Nested DOS partitions detected, stopping **\n");
+ return -1;
+ }
+
if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
printf ("** Can't read partition table on %d:" LBAFU " **\n",
dev_desc->devnum, ext_part_sector);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
if (!ext_part_sector)
- disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
+ disksig = get_unaligned_le32(&buffer[DOS_PART_DISKSIG_OFFSET]);
#endif
/* Print all primary/logical partitions */
if (((pt->boot_ind & ~0x80) == 0) &&
(pt->sys_ind != 0) &&
(part_num == which_part) &&
- (is_extended(pt->sys_ind) == 0)) {
+ (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) {
info->blksz = DOS_PART_DEFAULT_SECTOR;
info->start = (lbaint_t)(ext_part_sector +
- le32_to_int(pt->start4));
- info->size = (lbaint_t)le32_to_int(pt->size4);
+ get_unaligned_le32(pt->start4));
+ info->size = (lbaint_t)get_unaligned_le32(pt->size4);
part_set_generic_name(dev_desc, part_num,
(char *)info->name);
/* sprintf(info->type, "%d, pt->sys_ind); */
strcpy((char *)info->type, "U-Boot");
- info->bootable = is_bootable(pt);
+ info->bootable = get_bootable(pt);
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
sprintf(info->uuid, "%08x-%02x", disksig, part_num);
#endif
+ info->sys_ind = pt->sys_ind;
return 0;
}
for (i = 0; i < 4; i++, pt++) {
if (is_extended (pt->sys_ind)) {
lbaint_t lba_start
- = le32_to_int (pt->start4) + relative;
+ = get_unaligned_le32 (pt->start4) + relative;
return part_get_info_extended(dev_desc, lba_start,
ext_part_sector == 0 ? lba_start : relative,
return -1;
}
-void part_print_dos(struct blk_desc *dev_desc)
+static void __maybe_unused part_print_dos(struct blk_desc *dev_desc)
{
printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
print_partition_extended(dev_desc, 0, 0, 1, 0);
}
-int part_get_info_dos(struct blk_desc *dev_desc, int part,
- disk_partition_t *info)
+static int __maybe_unused part_get_info_dos(struct blk_desc *dev_desc, int part,
+ struct disk_partition *info)
{
return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
}
return test_block_type(buf) == DOS_MBR ? 0 : -1;
}
-int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
+#if CONFIG_IS_ENABLED(CMD_MBR)
+static void lba_to_chs(lbaint_t lba, unsigned char *rc, unsigned char *rh,
+ unsigned char *rs)
+{
+ unsigned int c, h, s;
+ /* use fixed CHS geometry */
+ unsigned int sectpertrack = 63;
+ unsigned int heads = 255;
+
+ c = (lba + 1) / sectpertrack / heads;
+ h = (lba + 1) / sectpertrack - c * heads;
+ s = (lba + 1) - (c * heads + h) * sectpertrack;
+
+ if (c > 1023) {
+ c = 1023;
+ h = 254;
+ s = 63;
+ }
+
+ *rc = c & 0xff;
+ *rh = h;
+ *rs = s + ((c & 0x300) >> 2);
+}
+
+static void mbr_fill_pt_entry(dos_partition_t *pt, lbaint_t start,
+ lbaint_t relative, lbaint_t size, uchar sys_ind, bool bootable)
+{
+ pt->boot_ind = bootable ? 0x80 : 0x00;
+ pt->sys_ind = sys_ind;
+ lba_to_chs(start, &pt->cyl, &pt->head, &pt->sector);
+ lba_to_chs(start + size - 1, &pt->end_cyl, &pt->end_head, &pt->end_sector);
+ put_unaligned_le32(relative, &pt->start4);
+ put_unaligned_le32(size, &pt->size4);
+}
+
+int write_mbr_partitions(struct blk_desc *dev,
+ struct disk_partition *p, int count, unsigned int disksig)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev->blksz);
+ lbaint_t ext_part_start = 0, ext_part_size = 0, ext_part_sect = 0;
+ dos_partition_t *pt;
+ int i;
+
+ memset(buffer, 0, dev->blksz);
+ buffer[DOS_PART_MAGIC_OFFSET] = 0x55;
+ buffer[DOS_PART_MAGIC_OFFSET + 1] = 0xaa;
+ put_unaligned_le32(disksig, &buffer[DOS_PART_DISKSIG_OFFSET]);
+ pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
+
+ /* create all primary partitions */
+ for (i = 0; i < 4 && i < count; i++, pt++) {
+ mbr_fill_pt_entry(pt, p[i].start, p[i].start, p[i].size,
+ p[i].sys_ind, p[i].bootable);
+ if (is_extended(p[i].sys_ind)) {
+ ext_part_start = p[i].start;
+ ext_part_size = p[i].size;
+ ext_part_sect = p[i].start;
+ }
+ }
+
+ if (i < count && !ext_part_start) {
+ printf("%s: extended partition is needed for more than 4 partitions\n",
+ __func__);
+ return -1;
+ }
+
+ /* write MBR */
+ if (blk_dwrite(dev, 0, 1, buffer) != 1) {
+ printf("%s: failed writing 'MBR' (1 blks at 0x0)\n",
+ __func__);
+ return -1;
+ }
+
+ /* create extended volumes */
+ for (; i < count; i++) {
+ lbaint_t next_ebr = 0;
+
+ memset(buffer, 0, dev->blksz);
+ buffer[DOS_PART_MAGIC_OFFSET] = 0x55;
+ buffer[DOS_PART_MAGIC_OFFSET + 1] = 0xaa;
+ pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
+
+ mbr_fill_pt_entry(pt, p[i].start, p[i].start - ext_part_sect,
+ p[i].size, p[i].sys_ind, p[i].bootable);
+
+ if (i + 1 < count) {
+ pt++;
+ next_ebr = p[i].start + p[i].size;
+ mbr_fill_pt_entry(pt, next_ebr,
+ next_ebr - ext_part_start,
+ p[i+1].start + p[i+1].size - next_ebr,
+ DOS_PART_TYPE_EXTENDED, 0);
+ }
+
+ /* write EBR */
+ if (blk_dwrite(dev, ext_part_sect, 1, buffer) != 1) {
+ printf("%s: failed writing 'EBR' (1 blks at 0x%lx)\n",
+ __func__, ext_part_sect);
+ return -1;
+ }
+ ext_part_sect = next_ebr;
+ }
+
+ /* Update the partition table entries*/
+ part_init(dev);
+
+ return 0;
+}
+
+int layout_mbr_partitions(struct disk_partition *p, int count,
+ lbaint_t total_sectors)
+{
+ struct disk_partition *ext = NULL;
+ int i, j;
+ lbaint_t ext_vol_start;
+
+ /* calculate primary partitions start and size if needed */
+ if (!p[0].start)
+ p[0].start = DOS_PART_DEFAULT_GAP;
+ for (i = 0; i < 4 && i < count; i++) {
+ if (!p[i].start)
+ p[i].start = p[i - 1].start + p[i - 1].size;
+ if (!p[i].size) {
+ lbaint_t end = total_sectors;
+ lbaint_t allocated = 0;
+
+ for (j = i + 1; j < 4 && j < count; j++) {
+ if (p[j].start) {
+ end = p[j].start;
+ break;
+ }
+ allocated += p[j].size;
+ }
+ p[i].size = end - allocated - p[i].start;
+ }
+ if (p[i].sys_ind == 0x05)
+ ext = &p[i];
+ }
+
+ if (count < 4)
+ return 0;
+
+ if (!ext) {
+ log_err("extended partition is needed for more than 4 partitions\n");
+ return -EINVAL;
+ }
+
+ /* calculate extended volumes start and size if needed */
+ ext_vol_start = ext->start;
+ for (i = 4; i < count; i++) {
+ if (!p[i].start)
+ p[i].start = ext_vol_start + DOS_PART_DEFAULT_GAP;
+ if (!p[i].size) {
+ lbaint_t end = ext->start + ext->size;
+ lbaint_t allocated = 0;
+
+ for (j = i + 1; j < count; j++) {
+ if (p[j].start) {
+ end = p[j].start - DOS_PART_DEFAULT_GAP;
+ break;
+ }
+ allocated += p[j].size + DOS_PART_DEFAULT_GAP;
+ }
+ p[i].size = end - allocated - p[i].start;
+ }
+ ext_vol_start = p[i].start + p[i].size;
+ }
+
+ return 0;
+}
+#endif
+
+int write_mbr_sector(struct blk_desc *dev_desc, void *buf)
{
if (is_valid_dos_buf(buf))
return -1;
return 1;
}
+ /* Update the partition table entries*/
+ part_init(dev_desc);
+
return 0;
}
projects / platform / kernel / u-boot.git / blobdiff