#include <command.h>
#include <ide.h>
#include <memalign.h>
+#include <asm/unaligned.h>
+#include <linux/compiler.h>
#include "part_dos.h"
#include <part.h>
* to use large numbers of partitions */
#define MAX_EXT_PARTS 256
-/* 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]
- );
-}
-
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 int get_bootable(dos_partition_t *p)
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",
}
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,
#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 */
(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); */
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,
+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 / J-u-boot.git / blobdiff