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firmware-utils/ptgen: set GPT partition attributes and name

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Allow setting GPT partition names as used by TF-A bl2 to identify the
FIP volume to load from eMMC and SD-card.
While at it, also allow setting 'required' attribute as it should be
used for volumes which are essential for the system to boot.
Also properly handle setting the LEGACY_BOOT flag on the partition
selected as 'active', as this is how it is specified in the spec.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2021-02-25 22:49:55 +00:00
parent 0235186182
commit 049ac36b2f
1 changed files with 71 additions and 10 deletions
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81
tools/firmware-utils/src/ptgen.c
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@ -52,6 +52,8 @@
#define swap(a, b) \
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
#define BIT(_x) (1UL << (_x))
typedef struct {
uint8_t b[16];
} guid_t;
@ -80,11 +82,23 @@ typedef struct {
GUID_INIT( 0x21686148, 0x6449, 0x6E6F, \
0x74, 0x4E, 0x65, 0x65, 0x64, 0x45, 0x46, 0x49)
#define GUID_PARTITION_LINUX_FIT_GUID \
GUID_INIT( 0xcae9be83, 0xb15f, 0x49cc, \
0x86, 0x3f, 0x08, 0x1b, 0x74, 0x4a, 0x2d, 0x93)
#define GUID_PARTITION_LINUX_FS_GUID \
GUID_INIT( 0x0fc63daf, 0x8483, 0x4772, \
0x8e, 0x79, 0x3d, 0x69, 0xd8, 0x47, 0x7d, 0xe4)
#define GPT_HEADER_SIZE 92
#define GPT_ENTRY_SIZE 128
#define GPT_ENTRY_MAX 128
#define GPT_ENTRY_NAME_SIZE 72
#define GPT_ATTR_PLAT_REQUIRED BIT(0)
#define GPT_ATTR_EFI_IGNORE BIT(1)
#define GPT_ATTR_LEGACY_BOOT BIT(2)
#define GPT_HEADER_SECTOR 1
#define GPT_FIRST_ENTRY_SECTOR 2
@ -109,6 +123,9 @@ struct partinfo {
unsigned long start;
unsigned long size;
int type;
char *name;
short int required;
guid_t guid;
};
/* GPT Partition table header */
@ -294,7 +311,7 @@ static int gen_ptable(uint32_t signature, int nr)
if (parts[i].start != 0) {
if (parts[i].start * 2 < start) {
fprintf(stderr, "Invalid start %ld for partition %d!\n",
parts[i].start, i);
parts[i].start, i, start);
return ret;
}
start = parts[i].start * 2;
@ -381,7 +398,7 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
if (parts[i].start != 0) {
if (parts[i].start * 2 < start) {
fprintf(stderr, "Invalid start %ld for partition %d!\n",
parts[i].start, i);
parts[i].start, i, start);
return ret;
}
start = parts[i].start * 2;
@ -396,12 +413,16 @@ static int gen_gptable(uint32_t signature, guid_t guid, unsigned nr)
gpte[i].end = cpu_to_le64(sect -1);
gpte[i].guid = guid;
gpte[i].guid.b[sizeof(guid_t) -1] += i + 1;
if (parts[i].type == 0xEF || (i + 1) == (unsigned)active) {
gpte[i].type = GUID_PARTITION_SYSTEM;
init_utf16("EFI System Partition", (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
} else {
gpte[i].type = GUID_PARTITION_BASIC_DATA;
}
gpte[i].type = parts[i].guid;
if (parts[i].name)
init_utf16(parts[i].name, (uint16_t *)gpte[i].name, GPT_ENTRY_NAME_SIZE / sizeof(uint16_t));
if ((i + 1) == (unsigned)active)
gpte[i].attr |= GPT_ATTR_LEGACY_BOOT;
if (parts[i].required)
gpte[i].attr |= GPT_ATTR_PLAT_REQUIRED;
if (verbose)
fprintf(stderr, "Partition %d: start=%" PRIu64 ", end=%" PRIu64 ", size=%" PRIu64 "\n",
@ -498,21 +519,44 @@ fail:
static void usage(char *prog)
{
fprintf(stderr, "Usage: %s [-v] [-n] [-g] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [-l <align kB>] [-G <guid>] [[-t <type>] -p <size>[@<start>]...] \n", prog);
fprintf(stderr, "Usage: %s [-v] [-n] [-g] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [-l <align kB>] [-G <guid>] [[-t <type>] [-r] [-N <name>] -p <size>[@<start>]...] \n", prog);
exit(EXIT_FAILURE);
}
static guid_t type_to_guid_and_name(unsigned char type, char **name)
{
guid_t guid = GUID_PARTITION_BASIC_DATA;
switch (type) {
case 0xef:
*name = "EFI System Partition";
guid = GUID_PARTITION_SYSTEM;
break;
case 0x83:
guid = GUID_PARTITION_LINUX_FS_GUID;
break;
case 0x2e:
guid = GUID_PARTITION_LINUX_FIT_GUID;
break;
}
return guid;
}
int main (int argc, char **argv)
{
unsigned char type = 0x83;
char *p;
int ch;
int part = 0;
char *name = NULL;
unsigned short int required = 0;
uint32_t signature = 0x5452574F; /* 'OWRT' */
guid_t guid = GUID_INIT( signature, 0x2211, 0x4433, \
0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0x00);
guid_t part_guid = GUID_PARTITION_BASIC_DATA;
while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vngl:S:G:")) != -1) {
while ((ch = getopt(argc, argv, "h:s:p:a:t:o:vnN:gl:rS:G:")) != -1) {
switch (ch) {
case 'o':
filename = optarg;
@ -543,11 +587,28 @@ int main (int argc, char **argv)
parts[part].start = to_kbytes(p);
}
parts[part].size = to_kbytes(optarg);
parts[part].required = required;
parts[part].name = name;
parts[part].guid = part_guid;
fprintf(stderr, "part %ld %ld\n", parts[part].start, parts[part].size);
parts[part++].type = type;
/*
* reset 'name' and 'required'
* 'type' is deliberately inherited from the previous delcaration
*/
name = NULL;
required = 0;
part_guid = type_to_guid_and_name(type, &name);
break;
case 'N':
name = optarg;
break;
case 'r':
required = 1;
break;
case 't':
type = (char)strtoul(optarg, NULL, 16);
part_guid = type_to_guid_and_name(type, &name);
break;
case 'a':
active = (int)strtoul(optarg, NULL, 0);