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util/ifittool: Add an option to set the FIT pointer a CBFS file 

The purpose of this is to eventually move the FIT table out of the
bootblock, generate it separately as a cbfs file and then have the FIT
pointer point to that cbfs file.

TESTED: extracted a FIT table using dd, added it as a cbfs file and see
that the FIT pointer correctly points to it. Also test that trying to
add a non valid FIT cbfs file results in an error.

Change-Id: I6e38b7df31e6b30f75b0ae57a5332f386e00f16b
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50925
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
This commit is contained in:
Arthur Heymans 2021-02-17 17:34:44 +01:00 committed by Patrick Georgi
parent 6ca3375c08
commit e9e4e54e27
3 changed files with 105 additions and 30 deletions
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40
util/cbfstool/fit.c
View File

@ -519,6 +519,40 @@ int fit_add_microcode_file(struct fit_table *fit,
return 0;
}
static uint32_t *get_fit_ptr(struct buffer *bootblock, fit_offset_converter_t offset_fn,
uint32_t topswap_size)
{
return rom_buffer_pointer(bootblock,
ptr_to_offset(offset_fn, bootblock,
FIT_POINTER_LOCATION - topswap_size));
}
/* Set the FIT pointer to a FIT table. */
int set_fit_pointer(struct buffer *bootblock,
const uint32_t fit_address,
fit_offset_converter_t offset_fn,
uint32_t topswap_size)
{
struct fit_table *fit;
uint32_t *fit_pointer = get_fit_ptr(bootblock, offset_fn, topswap_size);
fit = rom_buffer_pointer(bootblock, ptr_to_offset(offset_fn, bootblock, fit_address));
if (fit_address < FIT_TABLE_LOWEST_ADDRESS) {
ERROR("FIT must be reside in the top 16MiB.\n");
return 1;
}
if (!fit_table_verified(fit)) {
ERROR("FIT not found at address.\n");
return 1;
}
fit_pointer[0] = fit_address;
fit_pointer[1] = 0;
return 0;
}
/*
* Return a pointer to the active FIT.
*/
@ -527,11 +561,7 @@ struct fit_table *fit_get_table(struct buffer *bootblock,
uint32_t topswap_size)
{
struct fit_table *fit;
uint32_t *fit_pointer;
fit_pointer = rom_buffer_pointer(bootblock,
ptr_to_offset(offset_fn, bootblock,
FIT_POINTER_LOCATION));
uint32_t *fit_pointer = get_fit_ptr(bootblock, offset_fn, 0);
/* Ensure pointer is below 4GiB and within 16MiB of 4GiB */
if (fit_pointer[1] != 0 || fit_pointer[0] < FIT_TABLE_LOWEST_ADDRESS) {

3
util/cbfstool/fit.h
View File

@ -57,5 +57,6 @@ int fit_add_microcode_file(struct fit_table *fit,
const char *blob_name,
fit_offset_converter_t offset_helper,
const size_t max_fit_entries);
int set_fit_pointer(struct buffer *bootblock, const uint32_t offset,
fit_offset_converter_t offset_fn, uint32_t topswap_size);
#endif

54
util/cbfstool/ifittool.c
View File

@ -15,7 +15,7 @@
/* Global variables */
partitioned_file_t *image_file;
static const char *optstring = "H:j:f:r:d:t:n:s:cAaDvh?";
static const char *optstring = "H:j:f:r:d:t:n:s:cAaDvhF?";
static struct option long_options[] = {
{"file", required_argument, 0, 'f' },
{"region", required_argument, 0, 'r' },
@ -23,6 +23,7 @@ static struct option long_options[] = {
{"add-region", no_argument, 0, 'A' },
{"del-entry", required_argument, 0, 'd' },
{"clear-table", no_argument, 0, 'c' },
{"set-fit-pointer", no_argument, 0, 'F' },
{"fit-type", required_argument, 0, 't' },
{"cbfs-filename", required_argument, 0, 'n' },
{"max-table-size", required_argument, 0, 's' },
@ -43,6 +44,7 @@ static void usage(const char *name)
"\t\t-a|--add-entry : Add a CBFS file as new entry to FIT\n"
"\t\t-A|--add-region : Add region as new entry to FIT (for microcodes)\n"
"\t\t-d|--del-entry number : Delete existing <number> entry\n"
"\t\t-F|--set-fit-pointer : Set the FIT pointer to a CBFS file\n"
"\t\t-t|--fit-type : Type of new entry\n"
"\t\t-n|--name : The CBFS filename or region to add to table\n"
"\tOPTIONAL ARGUMENTS:\n"
@ -127,7 +129,8 @@ enum fit_operation {
NO_OP = 0,
ADD_CBFS_OP,
ADD_REGI_OP,
DEL_OP
DEL_OP,
SET_FIT_PTR_OP
};
int main(int argc, char *argv[])
@ -199,6 +202,14 @@ int main(int argc, char *argv[])
case 'f':
input_file = optarg;
break;
case 'F':
if (op != NO_OP) {
ERROR("specified multiple actions at once\n");
usage(argv[0]);
return 1;
}
op = SET_FIT_PTR_OP;
break;
case 'H':
headeroffset = strtoul(optarg, &suffix, 0);
if (!*optarg || (suffix && *suffix)) {
@ -253,6 +264,14 @@ int main(int argc, char *argv[])
}
}
if (op == SET_FIT_PTR_OP) {
if (name == NULL) {
ERROR("Adding FIT entry, but no name set\n");
usage(argv[0]);
return 1;
}
}
if (!region_name) {
ERROR("Region not given\n");
usage(argv[0]);
@ -281,14 +300,15 @@ int main(int argc, char *argv[])
return 1;
}
struct fit_table *fit = fit_get_table(&bootblock,
convert_to_from_top_aligned,
topswap_size);
struct fit_table *fit = NULL;
if (op != SET_FIT_PTR_OP) {
fit = fit_get_table(&bootblock, convert_to_from_top_aligned, topswap_size);
if (!fit) {
partitioned_file_close(image_file);
ERROR("FIT not found.\n");
return 1;
}
}
if (clear_table) {
if (fit_clear_table(fit)) {
@ -352,6 +372,30 @@ int main(int argc, char *argv[])
}
break;
}
case SET_FIT_PTR_OP:
{
uint32_t fit_address;
struct cbfs_file *cbfs_file = cbfs_get_entry(&image, name);
if (!cbfs_file) {
partitioned_file_close(image_file);
ERROR("%s not found in CBFS.\n", name);
return 1;
}
fit_address = offset_to_ptr(convert_to_from_top_aligned, &image.buffer,
cbfs_get_entry_addr(&image, cbfs_file)
+ ntohl(cbfs_file->offset));
if (set_fit_pointer(&bootblock, fit_address, convert_to_from_top_aligned,
topswap_size)) {
partitioned_file_close(image_file);
ERROR("%s is not a FIT table\n", name);
return 1;
}
fit = fit_get_table(&bootblock, convert_to_from_top_aligned, topswap_size);
break;
}
case DEL_OP:
{
if (fit_delete_entry(fit, table_entry)) {