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>
diff --git a/cmd/x86/hob.c b/cmd/x86/hob.c
index 98a6760..9e555c7 100644
--- a/cmd/x86/hob.c
+++ b/cmd/x86/hob.c
@@ -27,6 +27,16 @@
"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 @@
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 @@
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 @@
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)",
""
);