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firmware-utils/ptgen: change GPT to LBA addressing

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Do not align partitions with sectors. Only kb align
for GPT is supported.

Use 254 heads and 63 sectors for PMBR.

Signed-off-by: Oskari Lemmela <oskari@lemmela.net>
This commit is contained in:
Oskari Lemmela 2021-03-02 21:42:09 +02:00 committed by Daniel Golle
parent 460dd2fe28
commit 87406bbc09
1 changed files with 20 additions and 13 deletions
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33
tools/firmware-utils/src/ptgen.c
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@ -94,6 +94,7 @@ typedef struct {
#define GPT_ENTRY_SIZE 128
#define GPT_ENTRY_MAX 128
#define GPT_ENTRY_NAME_SIZE 72
#define GPT_SIZE GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE
#define GPT_ATTR_PLAT_REQUIRED BIT(0)
#define GPT_ATTR_EFI_IGNORE BIT(1)
@ -120,6 +121,7 @@ struct pte {
};
struct partinfo {
unsigned long actual_start;
unsigned long start;
unsigned long size;
int type;
@ -383,7 +385,8 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
.entry_size = cpu_to_le32(GPT_ENTRY_SIZE),
};
struct gpte gpte[GPT_ENTRY_MAX];
uint64_t start, end, sect = 0;
uint64_t start, end;
uint64_t sect = GPT_SIZE + GPT_FIRST_ENTRY_SECTOR;
int fd, ret = -1;
unsigned i, pmbr = 1;
@ -396,7 +399,7 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
fprintf(stderr, "Invalid size in partition %d!\n", i);
return ret;
}
start = sect + sectors;
start = sect;
if (parts[i].start != 0) {
if (parts[i].start * 2 < start) {
fprintf(stderr, "Invalid start %ld for partition %d!\n",
@ -407,11 +410,10 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
} else if (kb_align != 0) {
start = round_to_kb(start);
}
parts[i].actual_start = start;
gpte[i].start = cpu_to_le64(start);
sect = start + parts[i].size * 2;
if (kb_align == 0)
sect = round_to_cyl(sect);
gpte[i].end = cpu_to_le64(sect -1);
gpte[i].guid = guid;
gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
@ -445,13 +447,15 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
printf("%" PRIu64 "\n", (sect - start) * DISK_SECTOR_SIZE);
}
gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE);
gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64((kb_align ? round_to_kb(sectors) : (unsigned long)sectors) - 1);
gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
gpte[GPT_ENTRY_MAX - 1].guid = guid;
gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
if (parts[0].actual_start > GPT_FIRST_ENTRY_SECTOR + GPT_SIZE) {
gpte[GPT_ENTRY_MAX - 1].start = cpu_to_le64(GPT_FIRST_ENTRY_SECTOR + GPT_SIZE);
gpte[GPT_ENTRY_MAX - 1].end = cpu_to_le64(parts[0].actual_start - 1);
gpte[GPT_ENTRY_MAX - 1].type = GUID_PARTITION_BIOS_BOOT;
gpte[GPT_ENTRY_MAX - 1].guid = guid;
gpte[GPT_ENTRY_MAX - 1].guid.b[sizeof(guid_t) -1] += GPT_ENTRY_MAX;
}
end = sect + sectors - 1;
end = sect + GPT_SIZE;
pte[0].type = 0xEE;
pte[0].start = cpu_to_le32(GPT_HEADER_SECTOR);
@ -459,7 +463,7 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
to_chs(GPT_HEADER_SECTOR, pte[0].chs_start);
to_chs(end, pte[0].chs_end);
gpth.last_usable = cpu_to_le64(end - GPT_ENTRY_SIZE * GPT_ENTRY_MAX / DISK_SECTOR_SIZE - 1);
gpth.last_usable = cpu_to_le64(end - GPT_SIZE - 1);
gpth.alternate = cpu_to_le64(end);
gpth.entry_crc32 = cpu_to_le32(gpt_crc32(gpte, GPT_ENTRY_SIZE * GPT_ENTRY_MAX));
gpth.crc32 = cpu_to_le32(gpt_crc32((char *)&gpth, GPT_HEADER_SIZE));
@ -651,11 +655,14 @@ int main (int argc, char **argv)
}
}
argc -= optind;
if (argc || (heads <= 0) || (sectors <= 0) || !filename)
if (argc || (!use_guid_partition_table && ((heads <= 0) || (sectors <= 0))) || !filename)
usage(argv[0]);
if (use_guid_partition_table)
if (use_guid_partition_table) {
heads = 254;
sectors = 63;
return gen_gptable(signature, guid, part) ? EXIT_FAILURE : EXIT_SUCCESS;
}
return gen_ptable(signature, part) ? EXIT_FAILURE : EXIT_SUCCESS;
}