Some commands need to enumerate the existing UEFI load option variable("Boot####"). This commit transfers some code from cmd/efidebug.c to lib/efi_loder/, then exposes efi_varname_is_load_option() function to check whether the UEFI variable name is "Boot####".
Signed-off-by: Masahisa Kojima masahisa.kojima@linaro.org Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- v2->v3: - add static qualifier to u16_tohex()
Newly created in v2
cmd/efidebug.c | 23 +---------------------- include/efi_loader.h | 1 + lib/efi_loader/efi_helper.c | 33 +++++++++++++++++++++++++++++++++ 3 files changed, 35 insertions(+), 22 deletions(-)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c index ef239bb34b..ceb3aa5cee 100644 --- a/cmd/efidebug.c +++ b/cmd/efidebug.c @@ -1010,17 +1010,6 @@ static void show_efi_boot_opt(u16 *varname16) } }
-static int u16_tohex(u16 c) -{ - if (c >= '0' && c <= '9') - return c - '0'; - if (c >= 'A' && c <= 'F') - return c - 'A' + 10; - - /* not hexadecimal */ - return -1; -} - /** * show_efi_boot_dump() - dump all UEFI load options * @@ -1041,7 +1030,6 @@ static int do_efi_boot_dump(struct cmd_tbl *cmdtp, int flag, u16 *var_name16, *p; efi_uintn_t buf_size, size; efi_guid_t guid; - int id, i, digit; efi_status_t ret;
if (argc > 1) @@ -1074,16 +1062,7 @@ static int do_efi_boot_dump(struct cmd_tbl *cmdtp, int flag, return CMD_RET_FAILURE; }
- if (memcmp(var_name16, u"Boot", 8)) - continue; - - for (id = 0, i = 0; i < 4; i++) { - digit = u16_tohex(var_name16[4 + i]); - if (digit < 0) - break; - id = (id << 4) + digit; - } - if (i == 4 && !var_name16[8]) + if (efi_varname_is_load_option(var_name16, NULL)) show_efi_boot_opt(var_name16); }
diff --git a/include/efi_loader.h b/include/efi_loader.h index 0c6c95ba46..0899e293e5 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -707,6 +707,7 @@ int algo_to_len(const char *algo);
int efi_link_dev(efi_handle_t handle, struct udevice *dev); int efi_unlink_dev(efi_handle_t handle); +bool efi_varname_is_load_option(u16 *var_name16, int *index);
/** * efi_size_in_pages() - convert size in bytes to size in pages diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c index c71e87d118..788cb9faec 100644 --- a/lib/efi_loader/efi_helper.c +++ b/lib/efi_loader/efi_helper.c @@ -190,3 +190,36 @@ int efi_unlink_dev(efi_handle_t handle)
return 0; } + +static int u16_tohex(u16 c) +{ + if (c >= '0' && c <= '9') + return c - '0'; + if (c >= 'A' && c <= 'F') + return c - 'A' + 10; + + /* not hexadecimal */ + return -1; +} + +bool efi_varname_is_load_option(u16 *var_name16, int *index) +{ + int id, i, digit; + + if (memcmp(var_name16, u"Boot", 8)) + return false; + + for (id = 0, i = 0; i < 4; i++) { + digit = u16_tohex(var_name16[4 + i]); + if (digit < 0) + break; + id = (id << 4) + digit; + } + if (i == 4 && !var_name16[8]) { + if (index) + *index = id; + return true; + } + + return false; +}