"devices" command prints all the uefi variables on the system.
=> efi devices Scanning disk ahci_scsi.id0lun0... Scanning disk ahci_scsi.id1lun0... Found 4 disks Device Device Path ================ ==================== 000000007ef07ea0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b) 000000007ef00c10 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(0,0) 000000007ef00dd0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0) 000000007ef07be0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(1,MBR,0x086246ba,0x800,0x40000) 000000007ef07510 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(2,MBR,0x086246ba,0x40800,0x3f800)
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- cmd/efidebug.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 101 insertions(+), 1 deletion(-)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c index d836576cf6e0..8a7f775b117a 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -15,6 +15,102 @@ #include <search.h> #include <linux/ctype.h>
+#define BS systab.boottime + +static int efi_get_handles_by_proto(efi_guid_t *guid, efi_handle_t **handlesp, + int *num) +{ + efi_handle_t *handles = NULL; + efi_uintn_t size = 0; + efi_status_t ret; + + if (guid) { + ret = BS->locate_handle(BY_PROTOCOL, guid, NULL, &size, + handles); + if (ret == EFI_BUFFER_TOO_SMALL) { + handles = calloc(1, size); + if (!handles) + return -1; + + ret = BS->locate_handle(BY_PROTOCOL, guid, NULL, &size, + handles); + } + if (ret != EFI_SUCCESS) { + free(handles); + return -1; + } + } else { + ret = BS->locate_handle(ALL_HANDLES, NULL, NULL, &size, NULL); + if (ret == EFI_BUFFER_TOO_SMALL) { + handles = calloc(1, size); + if (!handles) + return -1; + + ret = BS->locate_handle(ALL_HANDLES, NULL, NULL, &size, + handles); + } + if (ret != EFI_SUCCESS) { + free(handles); + return -1; + } + } + + *handlesp = handles; + *num = size / sizeof(efi_handle_t); + + return 0; +} + +static int efi_get_device_handle_info(efi_handle_t handle, u16 **dev_path_text) +{ + struct efi_device_path *dp; + efi_status_t ret; + + ret = BS->open_protocol(handle, &efi_guid_device_path, + (void **)&dp, NULL /* FIXME */, NULL, + EFI_OPEN_PROTOCOL_GET_PROTOCOL); + if (ret == EFI_SUCCESS) { + *dev_path_text = efi_dp_str(dp); + return 0; + } else { + return -1; + } +} + +#define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2) + +static const char spc[] = " "; +static const char sep[] = "================"; + +static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + efi_handle_t *handles; + u16 *dev_path_text; + int num, i; + + handles = NULL; + num = 0; + if (efi_get_handles_by_proto(NULL, &handles, &num)) + return CMD_RET_FAILURE; + + if (!num) + return CMD_RET_SUCCESS; + + printf("Device%.*s Device Path\n", EFI_HANDLE_WIDTH - 6, spc); + printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep); + for (i = 0; i < num; i++) { + if (!efi_get_device_handle_info(handles[i], &dev_path_text)) { + printf("%p %ls\n", handles[i], dev_path_text); + efi_free_pool(dev_path_text); + } + } + + free(handles); + + return CMD_RET_SUCCESS; +} + static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { @@ -406,6 +502,8 @@ static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
static cmd_tbl_t cmd_efidebug_sub[] = { U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""), + U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices, + "", ""), };
/* Interpreter command to configure UEFI environment */ @@ -451,7 +549,9 @@ static char efidebug_help_text[] = " - set UEFI BootNext variable\n" "efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n" " - set/show UEFI boot order\n" - "\n"; + "\n" + "efidebug devices\n" + " - show uefi devices\n"; #endif
U_BOOT_CMD(