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x86: Allow showing details about a HOB entry 

Some HOBs include information that can be decoded. Add a -v option to the
hob command, to allow this to be displayed. Add the ability to decode a
resource descriptor.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-09-22 14:54:50 -06:00 committed by Bin Meng
parent 10536ceae9
commit 51af144eb7
1 changed files with 45 additions and 4 deletions
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49
cmd/x86/hob.c
View File

@ -27,6 +27,16 @@ static char *hob_type[] = {
"Capsule",
};
static char *res_type[] = {
"System",
"Memory-mapped I/O",
"I/O",
"Firmware device",
"Memory-mapped I/O port",
"Reserved",
"I/O reserved",
};
static struct guid_name {
efi_guid_t guid;
const char *name;
@ -58,6 +68,26 @@ static const char *guid_to_name(const efi_guid_t *guid)
return NULL;
}
static void show_hob_details(const struct hob_header *hdr)
{
const void *ptr = hdr;
switch (hdr->type) {
case HOB_TYPE_RES_DESC: {
const struct hob_res_desc *res = ptr;
const char *typename;
typename = res->type > 0 && res->type <= RES_MAX_MEM_TYPE ?
res_type[res->type] : "unknown";
printf(" base = %08llx, len = %08llx, end = %08llx, type = %d (%s)\n\n",
res->phys_start, res->len, res->phys_start + res->len,
res->type, typename);
break;
}
}
}
static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
const struct hob_header *hdr;
@ -66,12 +96,20 @@ static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
int i = 0;
efi_guid_t *guid;
char uuid[UUID_STR_LEN + 1];
bool verbose = false;
int seq = -1; /* Show all by default */
argc--;
argv++;
if (argc)
seq = simple_strtol(*argv, NULL, 16);
if (argc) {
if (!strcmp("-v", *argv)) {
verbose = true;
argc--;
argv++;
}
if (argc)
seq = simple_strtol(*argv, NULL, 16);
}
hdr = gd->arch.hob_list;
printf("HOB list address: 0x%08x\n\n", (unsigned int)hdr);
@ -111,13 +149,16 @@ static int do_hob(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
printf("%36s", "Not Available");
}
printf("\n");
if (verbose)
show_hob_details(hdr);
}
return 0;
}
U_BOOT_CMD(hob, 2, 1, do_hob,
"[seq] Print Hand-Off Block (HOB) information"
U_BOOT_CMD(hob, 3, 1, do_hob,
"[-v] [seq] Print Hand-Off Block (HOB) information"
" -v - Show detailed HOB information where available"
" seq - Record # to show (all by default)",
""
);